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  • 1
    Electronic Resource
    Electronic Resource
    High-latitude influence on the eastern equatorial Pacific climate in the early Pleistocene epoch (2004)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 427 (2004), S. 720-723 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Many records of tropical sea surface temperature and marine productivity exhibit cycles of 23 kyr (orbital precession) and 100 kyr during the past 0.5 Myr (refs 1–5), whereas high-latitude sea surface temperature records display much more pronounced ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nature02338
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    Paper (German National Licenses)
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  • 2
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    South China Sea hydrological changes and Pacific Walker Circulation variations over the last millennium (2011)
    Nature Publishing Group
    Details
    Publication Date: 2022-05-25
    Description: © Macmillan Publishers Limited, 2011. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Nature Communications 2 (2011): 293, doi:10.1038/ncomms1297.
    Description: The relative importance of north–south migrations of the intertropical convergence zone (ITCZ) versus El Niño-Southern Oscillation and its associated Pacific Walker Circulation (PWC) variability for past hydrological change in the western tropical Pacific is unclear. Here we show that north–south ITCZ migration was not the only mechanism of tropical Pacific hydrologic variability during the last millennium, and that PWC variability profoundly influenced tropical Pacific hydrology. We present hydrological reconstructions from Cattle Pond, Dongdao Island of the South China Sea, where multi-decadal rainfall and downcore grain size variations are correlated to the Southern Oscillation Index during the instrumental era. Our downcore grain size reconstructions indicate that this site received less precipitation during relatively warm periods, AD 1000–1400 and AD 1850–2000, compared with the cool period (AD 1400–1850). Including our new reconstructions in a synthesis of tropical Pacific records results in a spatial pattern of hydrologic variability that implicates the PWC.
    Description: This work was supported by the Natural Science Foundation of China (NSFC) (40730107) and the Major State Basic Research Development Program of China (973 Program) (No.2010CB428902). DWO acknowledges support from the US NSF.
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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    PAPER (OA)
  • 3
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    Isotopic determinations on water samples from the northeastern Tibetan Plateau (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Description: On the Tibetan Plateau, applications of dD and d18O values in paleoclimate studies tend to be complicated due to multiple processes influencing isotopic compositions in paleoclimatic archives. In this study, isotopic compositions of modern waters in the eastern Qaidam Basin on the northeastern Tibetan Plateau, and dD values of n-fatty acids (n-FA dD) from a sediment core at Hurleg Lake were systematically analyzed to infer hydroclimate controls during the Holocene. The modern water isotopic results show a major contribution of snowmelt water originating from high-elevation mountains to the north of the Qaidam Basin via river and groundwater discharge, and the importance of evaporation in affecting lake water budget in this region. n-C26 FA dD values tend to be more negative at millennial-scale warm-dry periods during the Holocene, and vice versa, opposite to what is commonly expected. Assisted with modern water isotopic results, we infer amplified contribution of snowmelt water to the soil water around this open lake system at warm-dry periods. Meanwhile, changes in n-C16 FA dD values at Hurleg Lake reflect the evolution of isotopic compositions of lake water, thus we use the isotopic difference between n-C26 and n-C16 FA (dDC16-C26) to infer hydroclimate and evaporation variations in this region. Based on our data, relatively low n-C26 FA dD and n-C16 FA dD values at 10-6 cal ka BP indicate large contribution of snowmelt water into the lake during the Holocene Climate Optimum. After 6 cal ka BP, changes in evaporation became the major control on lake hydrology and led to larger fluctuations of dDC16-C26. Our study highlights the importance of systematic analysis on modern processes before using stable isotopes for paleoclimate reconstructions, and demonstrates that dD difference between long-chain and short-chain n-FA might be an effective way to better understand the controlling factor of hydrological variations in a climatic complex region like the Tibetan Plateau.
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 4
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    (Table S2) Alkenone (C37:4) determination from Hurleg Lake (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: Alkenone, C37:4; Calendar age; Event label; Lake_Hurleg_20050601; Sample comment; Tibetan Plateau; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 726 data points
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  • 5
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    (Table S3) Fatty acids (average chain length) determination from Hurleg Lake (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: Calendar age; Event label; Lake_Hurleg_20050601; n-fatty acids, average chain length; Sample comment; Tibetan Plateau; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 354 data points
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  • 6
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    (Table S4) Long chain acids determination from Hurleg Lake (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: -; Calendar age; Computed MgO Standard Deviation max; Event label; Lake_Hurleg_20050601; n-fatty acid C16, δD; n-fatty acid C24, δD; n-fatty acid C28, δD; Sample comment; Tibetan Plateau; Water sample; WS
    Type: Dataset
    Format: text/tab-separated-values, 384 data points
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  • 7
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    (Table S1) Local meteorological water isotope results from rain, river and lakes around the Lake Hurleg region (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: Event label; Lake_Gahai_20050717; Lake_Gahai_20050726; Lake_Gahai_20050727; Lake_Gahai_20070307; Lake_Hurleg_20050408; Lake_Hurleg_20050501; Lake_Hurleg_20050601; Lake_Hurleg_20050725; Lake_Hurleg_20050728; Lake_Hurleg_20060517; Lake_Hurleg_20060715; Lake_Hurleg_20060716; Lake_Hurleg_20060807; Lake_Hurleg_20061006; Lake_Hurleg_20061104; Lake_Hurleg_20070307; Lake_Jinzhai_20060717; Lake_Sugan_20060719; Lake_Toson_20050408; Lake_Toson_20050701; Lake_Toson_20050716; Lake_Toson_20050728; Lake_Yazi_20050729; Qinghai_Well-Spring_20050701; Qinghai_Well-Spring_20050726; Qinghai_Well-Spring_20050727; Qinghai_Well-Spring_20050728; Qinghai_Well-Spring_20060716; Qinghai_Well-Spring_20060719; Qinghai_Well-Spring_20070307-01; Qinghai_Well-Spring_20070407-02; Qinghai_Well-Spring_20070407-03; Qinghai_Well-Spring_20070507-04; Qinghai_Well-Spring_20070507-05; River_Baishui_20070507; River_Baiyin_20050401; River_Baiyin_20050701; River_Baiyin_20050724; River_Baiyin_20050728; River_Baiyin_20060719; River_Baiyin_20070407; River_Baiyin_20070507; River_Balegen_20070307; Sample comment; Tibetan Plateau; Water sample; WS; δ18O; δ Deuterium
    Type: Dataset
    Format: text/tab-separated-values, 168 data points
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  • 8
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    Alkenone-based SST record in sediment core YJ from northern South China Sea (2019)
    PANGAEA
    In:  Supplement to: Zhang, Yancheng; Zhu, Kai; Huang, Chao; Kong, Deming; He, Yuxin; Wang, Huanye; Liu, Weiguo; Xie, Zhouqing; Wei, Gangjian; Liu, Zhonghui (2019): Asian Winter Monsoon Imprint on Holocene SST Changes at the Northern Coast of the South China Sea. Geophysical Research Letters, 46(22), 13363-13370, https://doi.org/10.1029/2019GL085617
    Details
    Publication Date: 2023-10-16
    Description: Independent inference of the Asian winter monsoon (AWM), albeit achieved at several sparse sites, has reached no consensus for its variability through the Holocene. A sediment core from the northern coast of the South China Sea (SCS) was utilized to analyze organic biomarkers at (bi‐)decadal resolution, unveiling how SCS oceanic conditions fingerprint the AWM signal. Generally, alkenone sea surface temperature (SST) record, resembling the temporal structures of integrated tropical SST over the past 7500 years, shows abnormal cool temperatures (up to ~4°C) during the Little Ice Age (LIA) and between ~1200 and 2500 yr BP, when windborne terrigenous hopane compounds experienced considerable increases superimposed on a general increasing trend. Our results, together with augmented SST gradient between the SCS coast and open ocean, consistently suggest AWM strengthening toward the late Holocene. An intensified AWM during cold intervals like the LIA would have provided strong positive feedback to enhance coastal cooling.
    Keywords: Age; AGE; Alkenone, C37:3+C37:2; alkenone SST; Biomarkers; DEPTH, sediment/rock; GC; Gravity corer; Hopane, total; northern coast; Sample code/label; SCS_YJ; Sea surface temperature; South China Sea; SST, from UK'37
    Type: Dataset
    Format: text/tab-separated-values, 2314 data points
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  • 9
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    (Appendix A) Sea surface temperature reconstruction for ODP Site 184-1143 (2011)
    PANGAEA
    In:  Supplement to: Li, Li; Li, Qianyu; Tian, Jun; Wang, Pinxian; Wang, Hui; Liu, Zhonghui (2011): A 4-Ma record of thermal evolution in the tropical western Pacific and its implications on climate change. Earth and Planetary Science Letters, 309(1-2), 10-20, https://doi.org/10.1016/j.epsl.2011.04.016
    Details
    Publication Date: 2024-01-09
    Description: Orbital resolution thermal histories over the last 4 Ma at ODP Site 1143 in the tropical western Pacific are reconstructed using alkenone paleothermometry. The temperature profile is characterized by a steady state of ~29 °C with fluctuations 〈 1 °C before 2.7 Ma and by a strong oscillating state from 2.7 Ma, largely due to cooling by up to 4 °C from ~29 °C in interglacial to 26 °C in glacial intervals. This implies a relative warm and stable surface hydrography during the early and mid Pliocene in this region influenced by the warm pool before temperature decreases in responding to global cooling and the formation of the distinct glacial stages since the late Pliocene. Therefore, the smaller SST gradient between tropical eastern and western Pacific and between southern and northern South China Sea before the late Pliocene indicates a super sized Pliocene Pacific warm pool, while the larger SST gradient since then marks progressively intensification of the zonal Walker circulation and meridional Hadley circulation, representing the monsoon circulations in the region. The intensification of the Walker and Hadley circulations over the tropical Pacific may also have helped on the onset of glaciations and subsequent deglaciations during the late Pliocene and Pleistocene.
    Keywords: 184-1143; AGE; Alkenone, unsaturation index UK'37; Calculated from UK'37 (Müller et al, 1998); COMPCORE; Composite Core; DEPTH, sediment/rock; Gas chromatography; Joides Resolution; Leg184; Ocean Drilling Program; ODP; Sea surface temperature, annual mean; South China Sea
    Type: Dataset
    Format: text/tab-separated-values, 3176 data points
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  • 10
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    (Table S2) Age control points used to derive Eocene-Oligocene chronologies for DSDP and ODP sites (2009)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 101-628A; 165-998B; 29-277; 38-336; 71-511; 95-603D; Age model; Age model, Berggren et al (1995) BKSA95; Ageprofile Datum Description; Antarctic Ocean/PLATEAU; Colombia Basin, Caribbean Sea; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Joides Resolution; Leg101; Leg165; Leg29; Leg38; Leg71; Leg95; North Atlantic/Norwegian Sea; North Atlantic/RIDGE; Ocean Drilling Program; ODP; Reference/source; Sample code/label; Sample code/label 2; South Atlantic/PLATEAU; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 186 data points
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