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  • Cambridge University Press  (12,515)
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  • 1
    Publication Date: 2022-10-26
    Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Xu, L., Roberts, M., Elder, K., Hansman, R., Gagnon, A., & Kurz, M. Radiocarbon in dissolved organic carbon by UV oxidation: an update of procedures and blank characterization at NOSAMS. Radiocarbon, 64(1), (2022): 195-199, https://doi.org/10.1017/rdc.2022.4.
    Description: This note describes improvements of UV oxidation method that is used to measure carbon isotopes of dissolved organic carbon (DOC) at the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS). The procedural blank is reduced to 2.6 ± 0.6 μg C, with Fm of 0.42 ± 0.10 and δ13C of –28.43 ± 1.19‰. The throughput is improved from one sample per day to two samples per day.
    Description: We gratefully acknowledge support from the U.S. National Science Foundation, via NSF-OCE-1755125.
    Keywords: Blank ; Dissolved organic carbon ; Radiocarbon ; UV-oxidation
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 2
    Publication Date: 2022-06-22
    Description: Pliocene–Quaternary faults are relevant structures with which to constrain the seismotectonic context and contribute to the evaluation of the seismic hazard of a region. Many of these faults, however, do not show clear surface evidence even when releasing earthquakes. For these reasons they can be extremely dangerous as they receive relatively little attention and can be difficult to identify. From among the various surface geology studies and/or palaeoseismological investigations, we focus our attention on the integration of different datasets such as seismic reflection profiles, surface kinematic data and the relocation of seismological data, which make it possible to identify and characterize active faults whose dimension and earthquake potential would otherwise not be large enough to make them identifiable. We take as an example the Montespertoli NE-trending fault in southern Tuscany (central Italy) with which we associate the 2016 M=3.9 Castelfiorentino earthquake. This structure is part of a wider (in the order of 15–20 km) crustal-scale shear zone, which may be responsible for strong historical earthquakes in the area.
    Description: Published
    Description: 853 - 872
    Description: 4T. Sismicità dell'Italia
    Description: JCR Journal
    Keywords: active faults ; seismic faults ; Earthquakes ; strike-slip faults ; inner Northern Apennines ; solid earth
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 3
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    Cambridge University Press
    Publication Date: 2022-10-26
    Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in McNichol, A., Key, R., & Guilderson, T. Global ocean radiocarbon programs. Radiocarbon, (2022): 1–13, https://doi.org/10.1017/rdc.2022.17.
    Description: The importance of studying the radiocarbon content of dissolved inorganic carbon (DI14C) in the oceans has been recognized for decades. Starting with the GEOSECS program in the 1970s, 14C sampling has been a part of most global survey programs. Early results were used to study air-sea gas exchange while the more recent results are critical for helping calibrate ocean general circulation models used to study the effects of climate change. Here we summarize the major programs and discuss some of the important insights the results are starting to provide.
    Description: Authors received funding from the National Science Foundation OCE-85865400 (APM) and a Woods Hole Oceanographic Technical Staff Award (APM).
    Keywords: Dissolved inorganic carbon ; Ocean models ; Oceanography ; Radiocarbon
    Repository Name: Woods Hole Open Access Server
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  • 4
    Publication Date: 2022-10-26
    Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Druffel, E., Beaupre, S., Grotheer, H., Lewis, C., McNichol, A., Mollenhauer, G., & Walker, B. Marine organic carbon and radiocarbon – present and future challenges. Radiocarbon, (2022): 1-17, https://doi.org/10.1017/RDC.2021.105.
    Description: We discuss present and developing techniques for studying radiocarbon in marine organic carbon (C). Bulk DOC (dissolved organic C) Δ14C measurements reveal information about the cycling time and sources of DOC in the ocean, yet they are time consuming and need to be streamlined. To further elucidate the cycling of DOC, various fractions have been separated from bulk DOC, through solid phase extraction of DOC, and ultrafiltration of high and low molecular weight DOC. Research using 14C of DOC and particulate organic C separated into organic fractions revealed that the acid insoluble fraction is similar in 14C signature to that of the lipid fraction. Plans for utilizing this methodology are described. Studies using compound specific radiocarbon analyses to study the origin of biomarkers in the marine environment are reviewed and plans for the future are outlined. Development of ramped pyrolysis oxidation methods are discussed and scientific questions addressed. A modified elemental analysis (EA) combustion reactor is described that allows high particulate organic C sample throughput by direct coupling with the MIniCArbonDAtingSystem.
    Keywords: CSRA ; Dissolved organic carbon ; Methodology ; Organic carbon ; Radiocarbon
    Repository Name: Woods Hole Open Access Server
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  • 5
    Publication Date: 2022-10-26
    Description: © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Priscu, J. C., Kalin, J., Winans, J., Campbell, T., Siegfried, M. R., Skidmore, M., Dore, J. E., Leventer, A., Harwood, D. M., Duling, D., Zook, R., Burnett, J., Gibson, D., Krula, E., Mironov, A., McManis, J., Roberts, G., Rosenheim, B. E., Christner, B. C., Kasic, K., Fricker, H. A., Lyons, W. B., Barker, J., Bowling, M., Collins, B., Davis, C., Gagnon, A., Gardner, C., Gustafson, C., Kim, O-S., Li, W., Michaud, A., Patterson, M. O., Tranter, M., Ryan Venturelli, R., Trista Vick-Majors, T., & Elsworth, C. Scientific access into Mercer Subglacial Lake: scientific objectives, drilling operations and initial observations. Annals of Glaciology, 62(85–86), (2021): 340–352, https://doi.org/10.1017/aog.2021.10.
    Description: The Subglacial Antarctic Lakes Scientific Access (SALSA) Project accessed Mercer Subglacial Lake using environmentally clean hot-water drilling to examine interactions among ice, water, sediment, rock, microbes and carbon reservoirs within the lake water column and underlying sediments. A ~0.4 m diameter borehole was melted through 1087 m of ice and maintained over ~10 days, allowing observation of ice properties and collection of water and sediment with various tools. Over this period, SALSA collected: 60 L of lake water and 10 L of deep borehole water; microbes 〉0.2 μm in diameter from in situ filtration of ~100 L of lake water; 10 multicores 0.32–0.49 m long; 1.0 and 1.76 m long gravity cores; three conductivity–temperature–depth profiles of borehole and lake water; five discrete depth current meter measurements in the lake and images of ice, the lake water–ice interface and lake sediments. Temperature and conductivity data showed the hydrodynamic character of water mixing between the borehole and lake after entry. Models simulating melting of the ~6 m thick basal accreted ice layer imply that debris fall-out through the ~15 m water column to the lake sediments from borehole melting had little effect on the stratigraphy of surficial sediment cores.
    Description: This material is based upon work supported by the US National Science Foundation, Section for Antarctic Sciences, Antarctic Integrated System Science program as part of the interdisciplinary (Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated study of carbon cycling in hydrologically-active subglacial environments) project (NSF-OPP 1543537, 1543396, 1543405, 1543453 and 1543441). Ok-Sun Kim was funded by the Korean Polar Research Institute. We are particularly thankful to the SALSA traverse personnel for crucial technical and logistical support. The United States Antarctic Program enabled our fieldwork; the New York Air National Guard and Kenn Borek Air provided air support; UNAVCO provided geodetic instrument support. Hot water drilling activities, including repair and upgrade modifications of the WISSARD hot water drill system, for the SALSA project were supported by a subaward from the Ice Drilling Program of Dartmouth College (NSF-PLR 1327315) to the University of Nebraska-Lincoln. J. Lawrence assisted with manuscript preparation. Finally, we are grateful to C. Dean, the SALSA Project Manager, and R. Ricards, SALSA Project Coordinator at McMurdo Station, for their organizational skills, and B. Huber of Lamont-Doherty Earth Observatory for providing the SBE39 PT sensors and the Nortek Aquadopp current meter and assisting with interpretation of the data. B. Huber also provided helpful input on programing and calibrating the SBE19PlusV2 6112 CTD.
    Keywords: Antarctic glaciology ; Basal ice ; Biogeochemistry ; Glacial sedimentology ; Subglacial lakes
    Repository Name: Woods Hole Open Access Server
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  • 6
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    Cambridge University Press
    In:  EPIC3Climate Change 2022: Impacts, adaptation and vulnerability. Contribution of the WGII to the 6th assessment report of the intergovernmental panel on climate change, ,, IPCC AR6 WGII, https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_FinalDraft_Chapter03.pdf, Cambridge University Press
    Publication Date: 2022-08-23
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , NonPeerReviewed
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  • 7
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    Cambridge University Press
    In:  EPIC3Climate Change 2022: Impacts, adaptation and vulnerability. Contribution of the WGII to the 6th assessment report of the intergovernmental panel on climate change, IPCC AR6 WGII, Climate Change 2022: Impacts, adaptation and vulnerability. Contribution of the WGII to the 6th assessment report of the intergovernmental panel on climate change, IPCC AR6 WGII, https://www.ipcc.ch/report/ar6/wg2/downloads/report/IPCC_AR6_WGII_FinalDraft_Chapter02.pdf, Cambridge University Press, 5 p., pp. 22-26
    Publication Date: 2022-06-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
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  • 8
    Publication Date: 2022-07-20
    Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Tan, S., Pratt, L. J., Voet, G., Cusack, J. M., Helfrich, K. R., Alford, M. H., Girton, J. B., & Carter, G. S. Hydraulic control of flow in a multi-passage system connecting two basins. Journal of Fluid Mechanics, 940, (2022): A8, https://doi.org/10.1017/jfm.2022.212.
    Description: When a fluid stream in a conduit splits in order to pass around an obstruction, it is possible that one branch will be critically controlled while the other remains not so. This is apparently the situation in Pacific Ocean abyssal circulation, where most of the northward flow of Antarctic bottom water passes through the Samoan Passage, where it is hydraulically controlled, while the remainder is diverted around the Manihiki Plateau and is not controlled. These observations raise a number of questions concerning the dynamics necessary to support such a regime in the steady state, the nature of upstream influence and the usefulness of rotating hydraulic theory to predict the partitioning of volume transport between the two paths, which assumes the controlled branch is inviscid. Through the use of a theory for constant potential vorticity flow and accompanying numerical model, we show that a steady-state regime similar to what is observed is dynamically possible provided that sufficient bottom friction is present in the uncontrolled branch. In this case, the upstream influence that typically exists for rotating channel flow is transformed into influence into how the flow is partitioned. As a result, the partitioning of volume flux can still be reasonably well predicted with an inviscid theory that exploits the lack of upstream influence.
    Description: This work was supported by the National Science Foundation under grants OCE-1029268, OCE-1029483, OCE-1657264, OCE-1657795, OCE-1657870 and OCE-1658027.
    Repository Name: Woods Hole Open Access Server
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  • 9
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    Cambridge University Press
    In:  EPIC3Antarctic Science, Cambridge University Press, 33(6), pp. 575-595, ISSN: 0954-1020
    Publication Date: 2022-01-13
    Description: The waters along the West Antarctic Peninsula (WAP) have experienced warming and increased freshwater inputs from melting sea ice and glaciers in recent decades. Challenges exist in understanding the consequences of these changes on the inorganic carbon system in this ecologically important and highly productive ecosystem. Distributions of dissolved inorganic carbon (CT), total alkalinity (AT) and nutrients revealed key physical, biological and biogeochemical controls of the calcium carbonate saturation state (Ωaragonite) in different water masses across the WAP shelf during the summer. Biological production in spring and summer dominated changes in surface water Ωaragonite (ΔΩaragonite up to +1.39; ∼90%) relative to underlying Winter Water. Sea-ice and glacial meltwater constituted a minor source of AT that increased surface water Ωaragonite (ΔΩaragonite up to +0.07; ∼13%). Remineralization of organic matter and an influx of carbon-rich brines led to cross-shelf decreases in Ωaragonite in Winter Water and Circumpolar Deep Water. A strong biological carbon pump over the shelf created Ωaragonite oversaturation in surface waters and suppression of Ωaragonite in subsurface waters. Undersaturation of aragonite occurred at 〈 ∼1000 m. Ongoing changes along the WAP will impact the biologically driven and meltwater-driven processes that influence the vulnerability of shelf waters to calcium carbonate undersaturation in the future.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev , info:eu-repo/semantics/article
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  • 10
    Publication Date: 2022-10-26
    Description: © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in [Schiller, C. M., Whitlock, C., Elder, K. L., Iverson, N. A., & Abbott, M. B. Erroneously old radiocarbon ages from terrestrial pollen concentrates in Yellowstone Lake, Wyoming, USA. Radiocarbon, 63(1), (2021): 321-342, https://doi.org/10.1017/RDC.2020.118.
    Description: Accelerator mass spectrometry (AMS) dating of pollen concentrates is often used in lake sediment records where large, terrestrial plant remains are unavailable. Ages produced from chemically concentrated pollen as well as manually picked Pinaceae grains in Yellowstone Lake (Wyoming) sediments were consistently 1700–4300 cal years older than ages established by terrestrial plant remains, tephrochronology, and the age of the sediment-water interface. Previous studies have successfully utilized the same laboratory space and methods, suggesting the source of old-carbon contamination is specific to these samples. Manually picking pollen grains precludes admixture of non-pollen materials. Furthermore, no clear source of old pollen grains occurs on the deglaciated landscape, making reworking of old pollen grains unlikely. High volumes of CO2 are degassed in the Yellowstone Caldera, potentially introducing old carbon to pollen. While uptake of old CO2 through photosynthesis is minor (F14C approximately 0.99), old-carbon contamination may still take place in the water column or in surficial lake sediments. It remains unclear, however, what mechanism allows for the erroneous ages of highly refractory pollen grains while terrestrial plant remains were unaffected. In the absence of a satisfactory explanation for erroneously old radiocarbon ages from pollen concentrates, we propose steps for further study.
    Description: This research was supported by NSF Grant No. 1515353 to C. Whitlock and sampling in Yellowstone National Park was conducted under permits YELL-SCI-0009 and YELL-SCI-5054.
    Keywords: AMS dating ; Chronology ; Contamination ; Paleoecology ; Pine
    Repository Name: Woods Hole Open Access Server
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  • 11
    Publication Date: 2022-10-26
    Description: © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Baker, M. G., Aster, R. C., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. Teleseismic earthquake wavefields observed on the Ross Ice Shelf. Journal of Glaciology, 67(261), (2021): 58-74, https://doi.org/10.1017/jog.2020.83.
    Description: Observations of teleseismic earthquakes using broadband seismometers on the Ross Ice Shelf (RIS) must contend with environmental and structural processes that do not exist for land-sited seismometers. Important considerations are: (1) a broadband, multi-mode ambient wavefield excited by ocean gravity wave interactions with the ice shelf; (2) body wave reverberations produced by seismic impedance contrasts at the ice/water and water/seafloor interfaces and (3) decoupling of the solid Earth horizontal wavefield by the sub-shelf water column. We analyze seasonal and geographic variations in signal-to-noise ratios for teleseismic P-wave (0.5–2.0 s), S-wave (10–15 s) and surface wave (13–25 s) arrivals relative to the RIS noise field. We use ice and water layer reverberations generated by teleseismic P-waves to accurately estimate the sub-station thicknesses of these layers. We present observations consistent with the theoretically predicted transition of the water column from compressible to incompressible mechanics, relevant for vertically incident solid Earth waves with periods longer than 3 s. Finally, we observe symmetric-mode Lamb waves generated by teleseismic S-waves incident on the grounding zones. Despite their complexity, we conclude that teleseismic coda can be utilized for passive imaging of sub-shelf Earth structure, although longer deployments relative to conventional land-sited seismometers will be necessary to acquire adequate data.
    Description: This research was supported by NSF grants PLR-1142518, 1141916, 1142126, 1246151, 1246416 and OPP-1744852 and 1744856.
    Keywords: Glacier geophysics ; Ice shelves ; Seismology
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  • 12
    Publication Date: 2022-05-27
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Tison, J.-L., Maksym, T., Fraser, A. D., Corkill, M., Kimura, N., Nosaka, Y., Nomura, D., Vancoppenolle, M., Ackley, S., Stammerjohn, S., Wauthy, S., Van der Linden, F., Carnat, G., Sapart, C., de Jong, J., Fripiat, F., & Delille, B. Physical and biological properties of early winter Antarctic sea ice in the Ross Sea. Annals of Glaciology, 61(83), (2020): 241–259, https://doi.org/10.1017/aog.2020.43.
    Description: This work presents the results of physical and biological investigations at 27 biogeochemical stations of early winter sea ice in the Ross Sea during the 2017 PIPERS cruise. Only two similar cruises occurred in the past, in 1995 and 1998. The year 2017 was a specific year, in that ice growth in the Central Ross Sea was considerably delayed, compared to previous years. These conditions resulted in lower ice thicknesses and Chl-a burdens, as compared to those observed during the previous cruises. It also resulted in a different structure of the sympagic algal community, unusually dominated by Phaeocystis rather than diatoms. Compared to autumn-winter sea ice in the Weddell Sea (AWECS cruise), the 2017 Ross Sea pack ice displayed similar thickness distribution, but much lower snow cover and therefore nearly no flooding conditions. It is shown that contrasted dynamics of autumnal-winter sea-ice growth between the Weddell Sea and the Ross Sea impacted the development of the sympagic community. Mean/median ice Chl-a concentrations were 3–5 times lower at PIPERS, and the community status there appeared to be more mature (decaying?), based on Phaeopigments/Chl-a ratios. These contrasts are discussed in the light of temporal and spatial differences between the two cruises.
    Description: S. Stammerjohn was supported by the PIPERS and LTER Programs of the U.S. National Science Foundation, ANT-1341606 (S. Stammerjohn and J. Cassano, U Colorado) and ANT-0823101 (H. Ducklow, LDEO/Columbia University), respectively. Steve Ackley (UTSA) was supported by the PIPERS program of the U.S. National Science Foundation ANT-1341717 and by NASA Grant 80NSSC19M0194 to the Center for Adv. Meas. in Extreme Environments at UTSA.Ted Maksym (WHOI) was supported by the PIPERS program of the U.S. National Science Foundation ANT-1341513. This research was supported by the Belgian F.R.S-FNRS (project ISOGGAP and IODIne, contract T.0268.16 and J.0262.17, respectively). Fanny Van der Linden, Sarah Wauthy, Gauthier Carnat, Célia Sapart and Bruno Delille are PhD students, postdoctoral researchers and research associate, respectively, of the Belgian F.R.S.-FNRS. This work was also supported by the Australian Government's Cooperative Research Centre program through the Antarctic Climate & Ecosystems Cooperative Research Centre, and by the Australian Research Council's Special Research Initiative for Antarctic Gateway Partnership (Project ID SR140300001). Daiki Nomura was supported by grants from the Japan Society for the Promotion of Science (#17H04715) and the National Institute for Polar Research through Project Research KP-303 (ROBOTICA) and #28-14.
    Keywords: Antarctic glaciology ; biogeochemistry ; sea ice
    Repository Name: Woods Hole Open Access Server
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  • 13
    Publication Date: 2022-10-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Roberts, Mark L., Elder, Kathryn L., Jenkins, William J., Gagnon, Alan R., Xu, Li, Hlavenka, Joshua D., & Longworth, Brett E. C-14 Blank Corrections for 25-100 mu G samples at the National Ocean Sciences AMS Laboratory. Radiocarbon, 61(5), (2019): 1403-1411, Doi: 10.1017/RDC.2019.74.
    Description: Replicate radiocarbon (14C) measurements of organic and inorganic control samples, with known Fraction Modern values in the range Fm = 0–1.5 and mass range 6 μg–2 mg carbon, are used to determine both the mass and radiocarbon content of the blank carbon introduced during sample processing and measurement in our laboratory. These data are used to model, separately for organic and inorganic samples, the blank contribution and subsequently “blank correct” measured unknowns in the mass range 25–100 μg. Data, formulas, and an assessment of the precision and accuracy of the blank correction are presented.
    Description: This work is supported by a Cooperative Agreement (OCE-1755125) with the U.S. National Science Foundation.
    Keywords: AMS ; AMS dating ; Blank corrections
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  • 14
    Publication Date: 2022-10-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Baker, M. G., Aster, R. C., Anthony, R. E., Chaput, J., Wiens, D. A., Nyblade, A., Bromirski, P. D., Gerstoft, P., & Stephen, R. A. Seasonal and spatial variations in the ocean-coupled ambient wavefield of the Ross Ice Shelf. Journal of Glaciology, 65(254), (2019): 912-925, doi:10.1017/jog.2019.64.
    Description: The Ross Ice Shelf (RIS) is host to a broadband, multimode seismic wavefield that is excited in response to atmospheric, oceanic and solid Earth source processes. A 34-station broadband seismographic network installed on the RIS from late 2014 through early 2017 produced continuous vibrational observations of Earth's largest ice shelf at both floating and grounded locations. We characterize temporal and spatial variations in broadband ambient wavefield power, with a focus on period bands associated with primary (10–20 s) and secondary (5–10 s) microseism signals, and an oceanic source process near the ice front (0.4–4.0 s). Horizontal component signals on floating stations overwhelmingly reflect oceanic excitations year-round due to near-complete isolation from solid Earth shear waves. The spectrum at all periods is shown to be strongly modulated by the concentration of sea ice near the ice shelf front. Contiguous and extensive sea ice damps ocean wave coupling sufficiently so that wintertime background levels can approach or surpass those of land-sited stations in Antarctica.
    Description: This research was supported by NSF grants PLR-1142518, 1141916, 1142126, 1246151 and 1246416. JC was additionally supported by Yates funds in the Colorado State University Department of Mathematics. PDB also received support from the California Department of Parks and Recreation, Division of Boating and Waterways under contract 11-106-107. We thank Reinhard Flick and Patrick Shore for their support during field work, Tom Bolmer in locating stations and preparing maps, and the US Antarctic Program for logistical support. The seismic instruments were provided by the Incorporated Research Institutions for Seismology (IRIS) through the PASSCAL Instrument Center at New Mexico Tech. Data collected are available through the IRIS Data Management Center under RIS and DRIS network code XH. The PSD-PDFs presented in this study were processed with the IRIS Noise Tool Kit (Bahavar and others, 2013). The facilities of the IRIS Consortium are supported by the National Science Foundation under Cooperative Agreement EAR-1261681 and the DOE National Nuclear Security Administration. The authors appreciate the support of the University of Wisconsin-Madison Automatic Weather Station Program for the data set, data display and information; funded under NSF grant number ANT-1543305. The Ross Ice Shelf profiles were generated using the Antarctic Mapping Tools (Greene and others, 2017). Regional maps were generated with the Generic Mapping Tools (Wessel and Smith, 1998). Topography and bathymetry data for all maps in this study were sourced from the National Geophysical Data Center ETOPO1 Global Relief Model (doi:10.7289/V5C8276M). We thank two anonymous reviewers for suggestions on the scope and organization of this paper.
    Keywords: Antarctic glaciology ; Ice shelves ; Seismology
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  • 15
    Publication Date: 2022-10-21
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ackley, S. F., Stammerjohn, S., Maksym, T., Smith, M., Cassano, J., Guest, P., Tison, J., Delille, B., Loose, B., Sedwick, P., DePace, L., Roach, L., & Parno, J. Sea-ice production and air/ice/ocean/biogeochemistry interactions in the Ross Sea during the PIPERS 2017 autumn field campaign. Annals of Glaciology, 61(82), (2020): 181-195, doi:10.1017/aog.2020.31.
    Description: The Ross Sea is known for showing the greatest sea-ice increase, as observed globally, particularly from 1979 to 2015. However, corresponding changes in sea-ice thickness and production in the Ross Sea are not known, nor how these changes have impacted water masses, carbon fluxes, biogeochemical processes and availability of micronutrients. The PIPERS project sought to address these questions during an autumn ship campaign in 2017 and two spring airborne campaigns in 2016 and 2017. PIPERS used a multidisciplinary approach of manned and autonomous platforms to study the coupled air/ice/ocean/biogeochemical interactions during autumn and related those to spring conditions. Unexpectedly, the Ross Sea experienced record low sea ice in spring 2016 and autumn 2017. The delayed ice advance in 2017 contributed to (1) increased ice production and export in coastal polynyas, (2) thinner snow and ice cover in the central pack, (3) lower sea-ice Chl-a burdens and differences in sympagic communities, (4) sustained ocean heat flux delaying ice thickening and (5) a melting, anomalously southward ice edge persisting into winter. Despite these impacts, airborne observations in spring 2017 suggest that winter ice production over the continental shelf was likely not anomalous.
    Description: NSF supported PIPERS award numbers: ANT-1341717 (S.F. Ackley, UTSA); ANT-1341513 (E. Maksym, WHOI); ANT-1341606 (S. Stammerjohn and J. Cassano, U Colorado); ANT-1341725 (P. Guest, NPS). P. Sedwick was supported by NSF ANT-1543483. S.F. Ackley was also supported by NASA Grant 80NSSC19M0194 to the Center for Advanced Measurements in Extreme Environments at UTSA. S. Stammerjohn was also supported by the LTER Program under NFS award number ANT-0823101 (H. Ducklow, LDEO/Columbia University). Additional support was by the Belgian F.R.S-FNRS (project ISOGGAP and IODIne, contract T.0268.16 and J.0262.17, respectively). Bruno Delille is a research associate of the F.R.S.-FNRS. Terra-Sar-X quicklook imagery was coordinated by Kathrin Hoeppner at DLR, and Andy Archer (with the Antarctic Support Contractor) provided selected (cloud-free) MODIS scenes and daily maps of AMSR2 sea-ice concentration.
    Keywords: Atmosphere/ice/ocean interactions ; Ice/ocean interactions ; Sea ice ; Sea-ice growth and decay
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  • 16
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Hughen, K. A., & Heaton, T. J. Updated Cariaco Basin C-14 calibration dataset from 0-60 cal kyr BP. Radiocarbon, 62(4), (2020): 1001-1043, doi:10.1017/RDC.2020.53.
    Description: We present new updates to the calendar and radiocarbon (14C) chronologies for the Cariaco Basin, Venezuela. Calendar ages were generated by tuning abrupt climate shifts in Cariaco Basin sediments to those in speleothems from Hulu Cave. After the original Cariaco-Hulu calendar age model was published, Hulu Cave δ18O records have been augmented with increased temporal resolution and a greater number of U/Th dates. These updated Hulu Cave records provide increased accuracy as well as precision in the final Cariaco calendar age model. The depth scale for the Ocean Drilling Program Site 1002D sediment core, the primary source of samples for 14C dating, has been corrected to account for missing sediment from a core break, eliminating age-depth anomalies that afflicted the earlier calendar age models. Individual 14C dates for the Cariaco Basin remain unchanged from previous papers, although detailed comparisons of the Cariaco calibration dataset to those from Hulu Cave and Lake Suigetsu suggest that the Cariaco marine reservoir age may have shifted systematically during the past. We describe these recent changes to the Cariaco datasets and provide the data in a comprehensive format that will facilitate use by the community.
    Description: K.A. Hughen was supported by funds from U.S. NSF grant #OCE-1657191, and by the Investment in Science Fund at WHOI. T.J. Heaton is supported by a Leverhulme Trust Fellowship RF-2019-140\9, “Improving the Measurement of Time Using Radiocarbon”.
    Keywords: Calibration ; Climate ; Radiocarbon
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    Publication Date: 2022-10-20
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Ackley, S. F., Perovich, D. K., Maksym, T., Weissling, B., & Xie, H. Surface flooding of Antarctic summer sea ice. Annals of Glaciology, 61(82), (2020): 117-126, doi:10.1017/aog.2020.22.
    Description: The surface flooding of Antarctic sea ice in summer covers 50% or more of the sea-ice area in the major summer ice packs, the western Weddell and the Bellingshausen-Amundsen Seas. Two CRREL ice mass-balance buoys were deployed on the Amundsen Sea pack in late December 2010 from the icebreaker Oden, bridging the summer period (January–February 2011). Temperature records from thermistors embedded vertically in the snow and ice showed progressive increases in the depth of the flooded layer (up to 0.3–0.35 m) on the ice cover during January and February. While the snow depth was relatively unchanged from accumulation (〈10 cm), ice thickness decreased by up to a meter from bottom melting during this period. Contemporaneous with the high bottom melting, under-ice water temperatures up to 1°C above the freezing point were found. The high temperature arises from solar heating of the upper mixed layer which can occur when ice concentration in the local area falls and lower albedo ocean water is exposed to radiative heating. The higher proportion of snow ice found in the Amundsen Sea pack ice therefore results from both winter snowfall and summer ice bottom melt found here that can lead to extensive surface flooding.
    Description: This work was supported by the National Science Foundation grant to UTSA, ANT-0839053-Sea Ice System in Antarctic Summer (S.F. Ackley, H. Xie and B. Weissling), and to WHOI, ANT-1341513 (T. Maksym), and by the NASA Center for Advanced Measurements in Extreme Environments or NASA-CAMEE at UTSA, NASA #80NSSC19M0194 (S.F. Ackley, H. Xie, B.Weissling).
    Keywords: Ice/ocean interactions ; Sea ice ; Sea-ice growth and decay ; Snow/ice surface processes
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  • 18
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Reimer, P. J., Austin, W. E. N., Bard, E., Bayliss, A., Blackwell, P. G., Ramsey, C. B., Butzin, M., Cheng, H., Edwards, R. L., Friedrich, M., Grootes, P. M., Guilderson, T. P., Hajdas, I., Heaton, T. J., Hogg, A. G., Hughen, K. A., Kromer, B., Manning, S. W., Muscheler, R., Palmer, J. G., Pearson, C., van der Plicht, J., Reimer, R. W., Richards, D. A., Scott, E. M., Southon, J. R., Turney, C. S. M., Wacker, L., Adolphi, F., Buentgen, U., Capano, M., Fahrni, S. M., Fogtmann-Schulz, A., Friedrich, R., Koehler, P., Kudsk, S., Miyake, F., Olsen, J., Reinig, F., Sakamoto, M., Sookdeo, A., & Talamo, S. The Intcal20 Northern Hemisphere radiocarbon age calibration curve (0-55 cal kBP). Radiocarbon, 62(4), (2020): 725-757, doi:10.1017/RDC.2020.41.
    Description: Radiocarbon (14C) ages cannot provide absolutely dated chronologies for archaeological or paleoenvironmental studies directly but must be converted to calendar age equivalents using a calibration curve compensating for fluctuations in atmospheric 14C concentration. Although calibration curves are constructed from independently dated archives, they invariably require revision as new data become available and our understanding of the Earth system improves. In this volume the international 14C calibration curves for both the Northern and Southern Hemispheres, as well as for the ocean surface layer, have been updated to include a wealth of new data and extended to 55,000 cal BP. Based on tree rings, IntCal20 now extends as a fully atmospheric record to ca. 13,900 cal BP. For the older part of the timescale, IntCal20 comprises statistically integrated evidence from floating tree-ring chronologies, lacustrine and marine sediments, speleothems, and corals. We utilized improved evaluation of the timescales and location variable 14C offsets from the atmosphere (reservoir age, dead carbon fraction) for each dataset. New statistical methods have refined the structure of the calibration curves while maintaining a robust treatment of uncertainties in the 14C ages, the calendar ages and other corrections. The inclusion of modeled marine reservoir ages derived from a three-dimensional ocean circulation model has allowed us to apply more appropriate reservoir corrections to the marine 14C data rather than the previous use of constant regional offsets from the atmosphere. Here we provide an overview of the new and revised datasets and the associated methods used for the construction of the IntCal20 curve and explore potential regional offsets for tree-ring data. We discuss the main differences with respect to the previous calibration curve, IntCal13, and some of the implications for archaeology and geosciences ranging from the recent past to the time of the extinction of the Neanderthals.
    Description: We would like to thank the National Natural Science Foundation of China grants NSFC 41888101 and NSFC 41731174, the 111 program of China (D19002), U.S. NSF Grant 1702816, and the Malcolm H. Wiener Foundation for support for research that contributed to the IntCal20 curve. The work on the Swiss and German YD trees was funded by the German Science foundation and the Swiss National Foundation (grant number: 200021L_157187). The operation in Aix-en-Provence is funded by the EQUIPEX ASTER-CEREGE, the Collège de France and the ANR project CARBOTRYDH (to EB). The work on the correlation of tree ring 14C with ice core 10Be was partially supported by the Swedish Research Council and the Knut and Alice Wallenberg foundation. M. Butzin was supported by the German Federal Ministry of Education and Research (BMBF) as Research for Sustainable Development (FONA; http://www.fona.de) through the PalMod project (grant number: 01LP1505B). S. Talamo and M. Friedrich are funded by the European Research Council under the European Union’s Horizon 2020 Research and Innovation Programme (grant agreement No. 803147-RESOLUTION, awarded to ST). CA. Turney would like to acknowledge support of the Australian Research Council (FL100100195 and DP170104665). P. Reimer and W. Austin acknowledge the support of the UKRI Natural Environment Research Council (Grant NE/M004619/1). T.J. Heaton is supported by a Leverhulme Trust Fellowship RF-2019-140\9. Other datasets and the IntCal20 database were created without external support through internal funding by the respective laboratories. We also would like to thank various institutions that provided funding or facilities for meetings.
    Keywords: Calibration curve ; Radiocarbon ; IntCal20
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    Publication Date: 2022-05-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Heaton, T. J., Koehler, P., Butzin, M., Bard, E., Reimer, R. W., Austin, W. E. N., Ramsey, C. B., Grootes, P. M., Hughen, K. A., Kromer, B., Reimer, P. J., Adkins, J., Burke, A., Cook, M. S., Olsen, J., & Skinner, L. C. Marine20-the marine radiocarbon age calibration curve (0-55,000 cal BP). Radiocarbon, 62(4), (2020): 779-820, doi:10.1017/RDC.2020.68.
    Description: The concentration of radiocarbon (14C) differs between ocean and atmosphere. Radiocarbon determinations from samples which obtained their 14C in the marine environment therefore need a marine-specific calibration curve and cannot be calibrated directly against the atmospheric-based IntCal20 curve. This paper presents Marine20, an update to the internationally agreed marine radiocarbon age calibration curve that provides a non-polar global-average marine record of radiocarbon from 0–55 cal kBP and serves as a baseline for regional oceanic variation. Marine20 is intended for calibration of marine radiocarbon samples from non-polar regions; it is not suitable for calibration in polar regions where variability in sea ice extent, ocean upwelling and air-sea gas exchange may have caused larger changes to concentrations of marine radiocarbon. The Marine20 curve is based upon 500 simulations with an ocean/atmosphere/biosphere box-model of the global carbon cycle that has been forced by posterior realizations of our Northern Hemispheric atmospheric IntCal20 14C curve and reconstructed changes in CO2 obtained from ice core data. These forcings enable us to incorporate carbon cycle dynamics and temporal changes in the atmospheric 14C level. The box-model simulations of the global-average marine radiocarbon reservoir age are similar to those of a more complex three-dimensional ocean general circulation model. However, simplicity and speed of the box model allow us to use a Monte Carlo approach to rigorously propagate the uncertainty in both the historic concentration of atmospheric 14C and other key parameters of the carbon cycle through to our final Marine20 calibration curve. This robust propagation of uncertainty is fundamental to providing reliable precision for the radiocarbon age calibration of marine based samples. We make a first step towards deconvolving the contributions of different processes to the total uncertainty; discuss the main differences of Marine20 from the previous age calibration curve Marine13; and identify the limitations of our approach together with key areas for further work. The updated values for ΔR, the regional marine radiocarbon reservoir age corrections required to calibrate against Marine20, can be found at the data base http://calib.org/marine/.
    Description: We would like to thank Jeremy Oakley and Richard Bintanja for informative discussions during the development of this work. T.J. Heaton is supported by a Leverhulme Trust Fellowship RF-2019-140\9, “Improving the Measurement of Time Using Radiocarbon”. M Butzin is supported by the German Federal Ministry of Education and Research (BMBF), as Research for Sustainability initiative (FONA); www.fona.de through the PalMod project (grant numbers: 01LP1505B, 01LP1919A). E. Bard is supported by EQUIPEX ASTER-CEREGE and ANR CARBOTRYDH. Meetings of the IntCal Marine Focus group have been supported by Collège de France. Data are available on the PANGAEA database at doi:10.159/ANGAEA.914500.
    Keywords: Bayesian modeling ; calibration ; carbon cycle ; computer model ; marine environment
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    The @journal of modern African studies 17 (1979), S. 219-251 
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    Notes: During the last few inflation-ridden years many countries have experienced a severe crisis of industrial relations as workers tried, through collective action, to preserve their living standards against the pressure of rising prices. But Tanzania stands as a conspicuous example of one country where, during the 1970s, strikes seem virtually to have disappeared, as may be seen from Table I.1 It is true that the Tanzanian definition of a strike excludes disputes lasting less than one day; and it is also true that there have been occasions since 1972 when workers have ‘downed tools’ for brief protest periods. But the lack of reported strikes in Tanzania is not a statistical illusion. The Labour Officers of the Ministry of Labour and Social Welfare keep a close watch on the state of industrial relations, and these occurrences are known to and are reported by them, as is shown by their recording of three strikes in 1977. This last fact also demonstrates that strikes can still occur in Tanzania.
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    The @journal of modern African studies 17 (1979), S. 342-344 
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    The @journal of modern African studies 17 (1979), S. 331-332 
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    The @journal of modern African studies 17 (1979), S. 348-349 
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    The @journal of modern African studies 17 (1979), S. 1-4 
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    The @journal of modern African studies 17 (1979), S. 29-46 
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    Notes: During the last decade or so there has been considerable interest in the nature and effects of protection policies on the economic performance of developing countries, and a number of attempts have been made to measure the levels of protection afforded local activities. It is, of course, desirable that such studies should take adequate account of the system of protection in its entirety, and this includes a consideration of direct (i.e. quantitative) as well as indirect (i.e. tariff) restrictions of imports.
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    Notes: At least since the beginning of this century, access to education has been the proximate determinant of class differentiation in Tanzania, and in much of Africa. Despite several initiatives to overcome this legacy of European rule, perhaps more sharply focused in Tanzania than in many other African countries, education and class situation continue to be firmly linked.
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    The @journal of modern African studies 17 (1979), S. 141-143 
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    The @journal of modern African studies 17 (1979), S. 629-654 
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    Notes: Economic dependence and cultural diversity are the bedrock upon which the élites of ex-colonial states attempt to construct a functioning state apparatus, a viable economy, and a sense of nationhood to surround and enshrine the emergent order. The achievement of national integration is sought in language and education policies, cultural and ideological programmes, and the structuring of access to – and distribution of – available resources. It is basically for this reason that a number of governments in the Third World require their highly educated youth to spend a year of service to the nation after they leave the university. Hence the National Youth Service Corps in Nigeria, which started operating in 1973, amidst great publicity, and has since become an established part of governmental and student planning. By mid-1979 about 46,000 had passed through the programme, serving the nation in a variety of jobs, mainly as teachers, before being employed in either the private or public sector.
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    Notes: The orthodox tradition in studies and explanations of lab our migration has been to adopt the perspective of those who move. Such a framework of analysis has then addressed itself to (i) the reasons why individuals and groups decide to migrate, and (ii) the consequences. As regards the first issue, it has generally been accepted that the phenomenon of migration is in response to economic forces that push and/or pull people out of their own communities into others – the ‘invisible hand of the market’. As for the second issue, emphasis is placed on the problematics of adjustment or assimilation into the host community, and also on the new values, as well as the other stimulants – good or bad – that the returning migrants bring home.
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    The @journal of modern African studies 17 (1979), S. 677-686 
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    Notes: In the 1950s the South African Government developed a broad strategy aimed at maintaining the supply of forced labour, named apartheid or ‘separate development’. Much more than a system of segregation, the programme involved moving large numbers of Africans from the urban centres into the underdeveloped Reserves, comprising 14 per cent of the least arable land in South Africa. Industry would then be shifted to the borders of these Bantustans. This last element of the scheme, the policy of industrial decentralisation, has been the main instrument for providing income to Africans in the rural areas. By examining this element in South African state planning, within the context of the apartheid system as a whole, I have tried to isolate some of the crucial dynamics of forced labour.
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    The @journal of modern African studies 17 (1979), S. 433-452 
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    Notes: This article analyses the nature of ideology in Nigeria and relates ideological competition to conflict between federal and local (especially urban) interests. It is argued that two strong ideologies exist: nationalism and populism. These two perspectives provide competing justifications for authority, and reflect the contradictory interests held by local-urban politicians and by the functional élites that dominate federal politics.
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    The @journal of modern African studies 17 (1979), S. 453-472 
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    Notes: Because there is growing evidence of interest in increasing the level and scope of activities in family planning programmes in sub-Saharan Africa, we believe that it is important to examine some of the assumptions under which these are being undertaken. In what is one of the poorest areas of the world, particularly in terms of health resources and educational facilities, with enormous gaps of trained personnel in both, the programmes already in existence have not been a notable success. Yet a rapidly expanding population quickly outpaces what efforts have been made in health and education, and there is now a growing concern that food supplies, particularly in West Africa, may soon enter a period of chronic shortage.
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    The @journal of modern African studies 17 (1979), S. 497-503 
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    The @journal of modern African studies 17 (1979), S. 503-504 
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    Notes: This article uses survey data from Tunisia to examine some of the ways that individual attitudes change in a developing society. At the same time, it is addressed to some inadequacies of modernisation theory, attempting both to understand better the impact of social change on attitudes, and to delineate the nature and consequences of different kinds of modernisation experiences. Modernisation studies usually treat lifestyle variations produced by social change as uni-dimensional so far as their effect on attitudes is concerned. The present study argues that lifestyles do not always change in an integrated fashion, and in particular that acculturation and socio-economic status, two basic dimensions of individual life circumstances in developing societies, often and increasingly vary independently of one another. It then demonstrates with data from Tunisia that measures of acculturation and socio-economic status bear independent and dissimilar relationships to many attitudes known to be associated with social change, and thereafter discusses the implications of these relationships for modernisation and political development. The focus of the analysis is on general theoretical issues.
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    Notes: This article compares the relative size and industrial distribution of artisanal manufacturing and service enterprises in Yaoundé and Accra, the capital cities of Cameroun and Ghana. The primary purpose is to provide evidence on the hypothesis that the characteristics of small-scale production are closely related to the level of development and industrialisation, and therefore likely to be similar in countries at similar levels elsewhere. The comparison is also used to highlight some operational problems of defining, measuring, and assisting ‘artisanal’ or ‘smallscale’ activities.
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    The @journal of modern African studies 17 (1979), S. 309-316 
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    Notes: The article by Michael F. Lofchie on ‘Agrarian Crisis and Economic Liberalisation in Tanzania’, published in this Journal, Vol. XVI, No. 3, September 1978, pp. 451–75, has already aroused considerable comment and raises a number of points of substantial general interest. It is, however, to my mind, somewhat misleading in several respects. Few, I think, would now dissent from the very general proposition that agricultural policies in the period up to 1974–5 contributed both to a generally slow rate of growth of production and to the major shortfall in output of that year, and that this in turn contributed to changes in policy since then.
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    The @journal of modern African studies 17 (1979), S. 334-335 
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    Notes: What, if anything, should be done about the rapidly mounting external debt of African and other Third-World countries? This question, prominent within the agenda of U.N.C.T.A.D. 5, is inseparable from the broader problem of what to do about the structure and performance of the global economy which, based on an international division of labour, puts numerous African countries in a situation where they experience acute and chronic deficits and unfavourable terms of trade. The accumulation of outstanding debt, and the concurrent obligation to meet growing service payments, is the result of that structure and process.
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    Notes: At the turn of the century, Sayid Maxamad Cabdille Xasan led a 21-year battle against foreign colonialists in the Somali lands. Then British aircraft mercilessly bombarded his main fort at Talex in 1920, and he died a few months later, his military forces in utter disarray. The Sayid, as he is known, is none the less considered the father of modern Somali nationalism. Military defeat did not spoil the lustre of this hero's feats.
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    The @journal of modern African studies 17 (1979), S. 144-145 
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    The @journal of modern African studies 17 (1979), S. 340-342 
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    The @journal of modern African studies 17 (1979), S. 156-157 
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    The @journal of modern African studies 17 (1979), S. 153-156 
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    The @journal of modern African studies 17 (1979), S. 170-172 
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    The @journal of modern African studies 17 (1979), S. 158-159 
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    The @journal of modern African studies 17 (1979), S. 164-166 
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    The @journal of modern African studies 17 (1979), S. 172-175 
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    The @journal of modern African studies 17 (1979), S. 703-709 
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    Notes: It is reasonable to assume that violence is a common recurring condition in all parts of the world, during all periods of history, and at all stages of social development. Yet there is not a single, compelling theory that specifies, even crudely, a comprehensive causal model of political violence.1 The reason, as C. N. Cnudde points out, is ‘that the processes which bring about change in a unit as vast as a nation are much more complex than any single theory predicts’.2 This complexity of the process has not, however, hindered the growth of scholarly literature. On the contrary, social scientists, despite certain theoretical and methodological difficulties, have subjected this relatively uncharted area to further exploration.
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    The @journal of modern African studies 17 (1979), S. 1-11 
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    The @journal of modern African studies 17 (1979), S. 1-4 
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    The @journal of modern African studies 17 (1979), S. 1-7 
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    The @journal of modern African studies 17 (1979), S. 199-217 
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    Notes: The ability of technological advancement to diversify the means of political control available to the state is a distinctive feature of modern life. Today, with the exception of the most underdeveloped and brutal régimes, the overt use of state force is complemented by a variety of control techniques, some so oblique as to defy detection even by the groups they are designed to regulate or repress. South Africa's stalled revolution, the subject of considerable concern to many analysts, is clearly not attributable to black acceptance of the present system, nor for that matter is it simply the result of the effectiveness with which the white minority has applied the more blatantly violent and directly coercive means of domination.1
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    The @journal of modern African studies 17 (1979), S. 183-197 
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    Notes: To speak of international co-operation and development is to speak of the past no less than the present – and of the future also. Indeed, a thin line divides evaluation of the past from analysis of the present, and both from prospects for the future. Let me start with the element of continuum.The Limits To Political IndependenceIt is in man's nature that each generation in turn reflects and inaugurates change. But the character and pace of change are never constant, and there are times when human needs demand that it proceed with unusual urgency. It is in such a time that we live; indeed, already, none of us live any longer in the kind of world into which we were born. Nor any university for that matter. And the rhythm of change is actually gaining momentum.
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    Modern Asian studies 13 (1979), S. 1-2 
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    Modern Asian studies 13 (1979), S. 1-11 
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    Modern Asian studies 13 (1979), S. 549-580 
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    Notes: India's military intervention in East Pakistan was an instance of the clear use of force for the achievement of limited political and security objectives. Indian policymakers' responses to the events in Pakistan were spread over a specific period of time and their decisions can be viewed in a series of distinct phases. The totality of actions involved diplomatic maneuvering in global, regional, and subcontinental geopolitical contexts. There were, in Indian perceptions, easily identified internal and external dimensions to the situation within East Pakistan such as to create potential threats to the Indian state, its territoriality, self-images, and international status in real and symbolic terms. The eventual settlement indicated a flexibility for action and achievement not ordinarily attributed to Indian capability.
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    Modern Asian studies 13 (1979), S. 529-548 
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    Notes: I should like to pay my tribute to the memory of Kingsley Martin by calling in question a part of the conventional wisdom of what passes for comparative sociology. I hope I shall not appear unduly contentious in doing so. I should not like to speak badly of comparative sociology. At the same time, it has to be admitted that a truly comparative sociology exists less in the work that scholars actually do than in the ideals they profess. The principal obstacle to its growth is, in my opinion, neither lack of wit nor lack of words: it is prejudice.
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    Modern Asian studies 13 (1979), S. 581-615 
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    Notes: This essay is the sequal to ‘The Missionary Activity of the Japan Congregational Church in Korea’. In the first part, I showed that the Congregational Church's missionary activity which started in 1911 was actually supported by the Government-General of Korea, and also mentioned a number of conscientious Christians such as Uchimura Kanzō and Kashiwagi Gien who not only opposed the Church's missionary activity in Korea but even went so far as to criticize the Japanese imperialist rule of Korea itself.
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    Modern Asian studies 13 (1979), S. 681-688 
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    Modern Asian studies 13 (1979), S. 617-641 
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    Notes: Education and assimilation were key components of Japanese colonial policy in Taiwan: assimilation of the island's native Taiwanese population (native islanders of Chinese ancestry) was an important goal; education was an instrument for attainment of this goal. When during their fifty years of rule (1895–1945) Taiwan's administrators altered their interpretation or definition of assimilation, they modified educational policies accordingly. From beginning to end of the Japanese period in Taiwan its government intended education for native islanders to be a major tool of its assimilation policy, which although a consistent policy was not a static one.
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    Modern Asian studies 13 (1979), S. 643-660 
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    Notes: Financial chaos was the rule during China's warlord period from 1916 to 1928. The Central Government in Peking was often short of funds because the warlords who controlled the provinces refused to forward tax receipts to the capital. The effectiveness of the financial administrative machinery in each province varied greatly, and if careful accounts were kept by the provincial governments, they have not been made public. Most confusing of all was the assortment of currencies circulating in the provinces. A bewildering variety of coins and paper notes, generally issued by local banks and money-changing shops, were used in each province, though they would probably not be accepted at face value in the neighbouring province. In some areas foreign currency, such as Mexican silver dollars or Japanese gold yen notes, could also be found in the key market towns. So many currencies were in use that local chambers of commerce met daily to calculate the relative values of the currencies traded in their immediate area.
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    Modern Asian studies 13 (1979), S. 688-689 
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    Modern Asian studies 13 (1979), S. 661-680 
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    Notes: When in August 1933 the German Minister to China, Dr Oskar P. Trautmann, reported to Berlin, ‘daβ die Völkerbundsmelodie politisch hier ausgespielt hat’, he had jumped to a conclusion too soon. When two years later the Journal Round Table commented, ‘to-day the League of Nations is no longer a political factor in the Far East’, this assessment was vindicated by evidence of every description. The two years between had witnessed the peak and decline of the League of Nation's ‘technical co-operation’ with the National Government of China. This episode plays its part as one of the major accomplishments of the League during the dismal second decade of its existence. It figures, however, only marginally in the history of twentieth-century China. Western works on modern Chinese history tend to neglect it altogether, and the most comprehensive scholarly treatment of China's foreign relations during the Republican period does not even deem it worth a reference in passing. On the other hand, the one authoritative textbook on modern Chinese economic history published in the People's Republic of China devotes ample space to the denunciation of the League's Chinese enterprise.
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    Modern Asian studies 13 (1979), S. 690-693 
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    Modern Asian studies 13 (1979), S. 693-694 
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    Modern Asian studies 13 (1979), S. 695-699 
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    Modern Asian studies 13 (1979), S. 699-700 
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    Modern Asian studies 13 (1979), S. 700-702 
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    Modern Asian studies 13 (1979), S. 702-703 
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    Modern Asian studies 13 (1979), S. 1-2 
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    Modern Asian studies 13 (1979), S. 1-6 
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    Modern Asian studies 13 (1979), S. 401-429 
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    Notes: The Purpose of this essay is to portray the missionary activity which the Japan Congregational Church (Nihon Kumiai Kirisuto Kyōkai) undertook in Korea between the years 1911 and 1921, and the various criticisms raised against it from both inside and outside the Church (owing to limited space we shall treat only the period up to the 1st March Movement).In doing so we shall try to illustrate at least partially the general views which Japanese Protestants held about Korea at the time.
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    Modern Asian studies 13 (1979), S. 521-523 
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    Modern Asian studies 13 (1979), S. 459-483 
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    Notes: The capitulation of China to the Western powers' military, commercial, and diplomatic offensive by 1860 removed the immediate formal façade of resistance to improved Sino-western relations which the West had sought. Not so easily removed were the endemic institutional and cultural obstacles to China's understanding and effective handling of foreign affairs which accompanied these expanded relations. Increased involvement with the West, both at the capital and in the provinces, generated more complex problems and renewed suspicion which made a practical knowledge of the Western powers and their behavior all the more urgent. Yet in a society which had consistently underestimated and depreciated the importance of the West, the requisite knowledge of the Western world did not lie readily at hand, and specialists in foreign affairs were few. This article examines the career of one foreign affairs expert in this critical period. Its purpose is twofold: First, to illuminate the origins and quality of ‘foreign affairs’ expertise in China, broadly defined here as the understanding and dealing with the West (including the knowledge of foreign activities and policies in China, of characteristics of, and distinctions among, foreigners and foreign nations, and policies with respect to foreigners); and second (and closely related to the first), to examine the role and significance of the specialist in Chinese society.
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    Modern Asian studies 13 (1979), S. 524-526 
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    Modern Asian studies 13 (1979), S. 526-527 
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    Modern Asian studies 13 (1979), S. 1-2 
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    Modern Asian studies 13 (1979), S. 485-517 
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    Notes: In this paper an attempt has been made to delineate the background of the religious support for the Pakistan movement in the Punjab by looking in particular at the connections between the structure of religious leadership and the structure of Muslim politics in 20th century Punjab. Only the rough outlines of these connections have been provided, but nevertheless some important patterns have emerged. From the time of the conversion to Islam of much of the western Punjab at the hands of sufi saints, religious leadership in the rural areas was focused on the hereditary sajjada nashins of the shrines of these saints. The position of these hereditary religious leaders was tied closely into the political organization of the rural areas, and this produced a considerable unity of political and economic interests between the religious and the secular leaders of rural society. Such common interests were strengthened by the British, who, in molding a system of rural administration in the Punjab, recognized the sajjada nashins of these shrines as part of a single ruling class of hereditary rural leaders. When the Unionist Party emerged in the 1920s as a party of rural interests led by this class of rural leaders, the sajjada nashins as a group were strongly disposed, therefore, to support it and to oppose the religious attacks on the Unionists which emanated from primarily urban reformist leaders.As a result of a widespread revival of sufi. influence in western Punjab in the post-Mughal era, however, many of the sajjada nashins in twentieth- century Punjab had also developed very strong religious commitments to spreading a deeper awareness of Islam. This revival had spread initially through the Chishti order but was later widened by the development of the Ahl-e-Sunnat-o-Jamaat group of ulama who gave religious legitimacy to the continuing emphasis on the forms of religious influence centered on the shrines. The sajjada nashins who drew on this revival tradition were not satisfied with the secular basis of the political system developed by the Unionists, but due to their structural grounding as sajjada nashins in the rural political milieu, they did not generally give the Unionists active opposition. The Unionist Party was thus able, with tacit religious support in the rural areas, to build a strong system of political authority based on rural control, and this propelled the Party to its sweeping victory in the 1937 elections.With the emergence of the Muslim League, however, which transcended the political question of rural interests versus urban, the revivalist sajjada nashins saw the opportunity to put rural politics on a more solid religious foundation. The concept of Pakistan was seen by them in traditional terms as the establishment of a religious state, ruled by the traditional leaders of rural society but firmly based on the Shariat. In the elections of 1946 the revivalist sajjada nashins provided the vanguard of religious support for Pakistan and played an important role in carrying the Muslim League to triumph over the Unionist Party. The victory was a sweeping religious mandate for Pakistan and marked the most important step on the road to Pakistan's formation.The important role of the sajjada nashins in the Muslim League's election victory was also an important pointer to the nature of the Pakistan state which was to emerge. Structurally, the revivalist sajjada nashins were themselves deeply rooted in rural society and their support for the Muslim League in no way represented a repudiation of the class of landed leaders who had long wielded power in western Punjab under the Unionist banner. The victory for Pakistan represented only, a call for a new religious definition of the old rural order, not for a new alignment of political power such as the reformist ulama had called for. The further definition of this system, however, remained to be developed in the new Muslim state.
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    Modern Asian studies 13 (1979), S. 1-2 
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    Modern Asian studies 13 (1979), S. 197-216 
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    Notes: The May Thirtieth Incident which occurred in Shanghai during 1925 has been regarded by the Chinese as one of the most important events in modern Chinese history, and the incident has been called ‘Wu-san Ch'an-an’ (the May 30th Tragedy) ever since 1925. Yet only a few studies in the Western languages deal with such an important event. Among those few studies, two of them concentrate on the role of labor in the movement, and the other after collecting a lot of source materials decides to add a subtitle, ‘an outline’, to recognize the vastness and complexity of the subject without making much effort to analyze or discuss the movement.
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    Modern Asian studies 13 (1979), S. 247-264 
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    Notes: The late nineteenth century was a period of selective institution-building by the British in India. Government's efforts were directed primarily towards the development of a more effective control and communications infrastructure. The initial impetus for such changes in Bengal came during the energetic administration of Sir George Campbell, the Lieutenant Governor from 1871 to 1874. Under his auspices, attempts were made to extend the administrative machinery down to the sub-district levels by the creation of sub-deputy collectorships and the revitalization of such local officials as kanungos (registrars), patwaris (village accountants) and chaukidars (village watchmen). Better connections to local society were also sought through institutions which linked government to its allies, such as municipal, local, and district boards, and the Court of Wards.
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    Modern Asian studies 13 (1979), S. 336-339 
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