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  • 1
    Monograph available for loan
    Monograph available for loan
    Analytical methods in geochemical prospecting (1981)
    Amsterdam [u.a.] : Elsevier
    Associated volumes
    Details Availability
    Call number: G 8159 ; 10/M 93.0130/1
    In: Handbook of exploration geochemistry
    Type of Medium: Monograph available for loan
    Pages: XIII, 255 S.
    ISBN: 0444419306
    Series Statement: Handbook of exploration geochemistry 1
    Language: English
    Location: Upper compact magazine
    Location: Reading room
    Branch Library: GFZ Library
    Branch Library: GFZ Library
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  • 2
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    Pollen counts of sediment core KK12_comp (2018)
    PANGAEA
    Details
    Publication Date: 2023-11-01
    Keywords: AGE; Allium; Alnus; Apiaceae; Artemisia; Asteraceae matricaria-type; Asteraceae saussurea-type; Asteraceae senecio-type; Asteraceae undifferentiated; AWI_Envi; Berberis; Betula; Botryococcus; Brassicaceae; Caltha; Cannabinaceae; Caryophyllaceae; Cedrus deodara; cf. Centaura montana; Chenopodiaceae; Chironomidae; COMPCORE; Composite Core; Coniferae; Cyperaceae; DEPTH, sediment/rock; Echinops; Ephedra distachya-type; Ephedra fragilis-type; Epilobium; Fabaceae; Fenestrateae; Gentianaceae; Helianthemum; Hippophae; Juniperus; Karakul Lake, Tadschikistan; KK12_comp; Lamiaceae; Liliaceae; Lycopodium (counted); Palynomorpha, non-pollen; Papaveraceae; Pediastrum; Pinus; Plantago; Poaceae; Polar Terrestrial Environmental Systems @ AWI; Pollen indeterminata; Polygonaceae; Populus; Potamogeton; Potentilla; Primula; Prunella; Quercus; Ranunculaceae; Ranunculus acris-type; Rosaceae; Rubiaceae; Rumex; Salix; Saxifragaceae; Scrophularia; Sum; Tadschikistan2012; Thalictrum; Tilia; Triglochin; Tsuga; Typha; Typha latifolia; Xanthium
    Type: Dataset
    Format: text/tab-separated-values, 3200 data points
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  • 3
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    Postglacial diatom-climate responses in a small lake in the Pacific Northwest of North America - Cores collected from Moss Lake, WA, USA have been analysed for diatoms and pollen as well as LOI and magnetic susceptibility, age/depth model output (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: Data provided here includes a Holocene diatom and pollen record from Moss Lake, Washington, USA (N 47o 41' 35.7" W 121o 50' 48.6"). Cores from Moss Lake were collected in 2014 and contain tephra deposits from Mount Mazama and Glacier Peak. Investigations have been carried out on the impact of tephra deposition, but this publication analyses the whole Holocene record. Included in this data set are the raw diatom and pollen counts, sedimentary analyses including Loss on Ignition (raw and interpolated values) and magnetic susceptibility (using a loop scanner), and Radiocarbon dates including the output from an age/depth model created using OxCal. Abstract A diatom record spanning the last 14,500 cal yr BP from Moss Lake, Washington, USA is used to assess Holocene climate change in the Pacific Northwest including evidence for periodicities related to atmospheric-ocean interactions and/or variations in solar output and is directly compared to the pollen record from the same site. Three main climate phases were identified: (i) the Late Pleistocene (until 11,800 Cal yr BP, GI-1, GS-1), with a cold climate evidenced by the low abundance of diatoms; (ii) Greenlandian/early Northgrippian (11,800 - 7500 Cal yr BP), with a shift to a warmer climate,; and (iii) late Northgrippian and Meghalayan from 7500 Cal yr BP onwards, with a cooler and moist climate. These climate shifts are in good agreement with the pollen record of Moss Lake and other records from the region. Fluctuations in Discostella pseudostelligera and Aulacoseira taxa suggest climatic cycles of varying amplitude throughout the assemblage and are conceptually linked to ENSO/PDO like cycles. Spectral analyses revealed periodicities of approximately 2100 yrs, 1400 yrs, and 450 yrs. The ~2100 yr cycle is attributed to solar variation, particularly the Hallstatt Oscillation. Both the ~1400 yr and ~450 yr cycles are attributed to ENSO and PDO like cycles. The ~1400 periodicity is evident throughout the Late Pleistocene and late Northgrippian/Meghalayan reflecting high amplitude shifts from El Niño/positive PDO (weak wind intensity) to La Niña/Negative PDO (high wind intensity). The cycle amplitudes are reduced during the Greenlandian and occur on a 450-year cycle. ENSO suppression is recorded throughout the Pacific Northwest, but most state it occurred during the Northgrippian, suggesting the diatom record from Moss Lake is modulated by endogenic processes during this time. Diatom data from Moss Lake has helped to refine our understanding of Holocene climate change and ENSP/PDO in the Pacific Northwest.
    Keywords: Climate change; diatoms; ENSO; Holocene; PDO; Pollen; time series analysis
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 4
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    Raw Pollen data from Lateglacial to late Holocene from sediment core MLC from Moss Lake, Washington, USA (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: Samples were prepared for pollen analysis as follows. A volume of 0.6 ml of each sample was prepared in seven steps following Moore et al. (1991): i) adding HCl, ii) sieving at 180 µm to ensure larger conifer pollen was included, iii) KOH digestion, iv) HF to remove silicates (Heusser and Stock, 1984), v) acetolysis, vi) alcohol dehydration, vii) and mounted in silicone oil. At least 300 terrestrial pollen grains were counted for each sample.
    Keywords: Abies; Alnus rubra; Alnus sinuata; Apiaceae undifferentiated; Artemisia; Asteraceae; Calculated; CDRILL; Charcoal; Chenopodiaceae; Climate change; Core drilling; Corylus; Counting; Cupressaceae; Cyperaceae; DEPTH, sediment/rock; diatoms; ENSO; Equisetum; Ericaceae undifferentiated; Holocene; Larix/Pseudotsuga; Lycopodium; Microfossils indeterminata; MLC; Moss_Lake_center; Moss Lake, Washington, USA; Myriophyllum alterniflorum; Myriophyllum spicatum; Number; Nuphar; PDO; Pediastrum cf. integrum; Picea; Pinus diploxylon; Poaceae; Pollen; Pollen per unit sediment volume; Polypodium; Populus; Potamogeton subgen. Potamogeton; Quercus; Rosaceae; Rubiaceae; Salix; Sample volume; Sphagnum; Spores, monolete; time series analysis; Tsuga heterophylla; Typha latifolia-type
    Type: Dataset
    Format: text/tab-separated-values, 2366 data points
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  • 5
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    Stratigraphic analyses from Lateglacial to late Holocene from sediment core MLC from Moss Lake, Washington, USA (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: Magnetic susceptibility was measured at room temperature and low frequency (0.47 kHz) using the MS2C scanner of a Bartington Instruments Ltd MS2 meter to determine allochthonous inputs. The measurements were taken for 10 seconds for each 1 cm section. Organic matter content were estimated via loss-on-ignition (LOI) (heating 550 °C for the organic content)
    Keywords: Bartington Instruments Ltd MS2 meter, MS2C scanner; CDRILL; Climate change; Core drilling; Core section label; DEPTH, sediment/rock; diatoms; ENSO; Holocene; Loss on ignition; Magnetic susceptibility; MLC; Moss_Lake_center; Moss Lake, Washington, USA; PDO; Pollen; time series analysis
    Type: Dataset
    Format: text/tab-separated-values, 1262 data points
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  • 6
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    Raw Diatom data from Lateglacial to late Holocene from sediment core MLC from Moss Lake, Washington, USA (2020)
    PANGAEA
    Details
    Publication Date: 2023-11-02
    Description: Diatom preparation followed a standard procedure (Battarbee, 1986), and followed Renberg's (1990) recommendation of bulk preparation using a water-bath. Microspheres were added to each sample to determine diatom concentration (Battarbee and Kneen, 1982). The concentration of microspheres added was 2 ml of 5.01x10^6 per 0.01 g dry weight of sediment. The samples were then diluted, placed on a cover slip and mounted to the microscope slide using Naphrax®. Diatoms were identified and counted at 1000x magnification. Identification was aided by the website “Diatoms of the United States” (Spaulding, 2014) and identification keys (Krammer and Lange-Bertalot, 1991, 1999a,b). At least 300 diatom frustules were counted per slide.
    Keywords: Adlafia aquaeductae; Asterionella formosa; Aulacoaseira crassipunctata; Aulacoseira alpigena; Aulacoseira granulata; Aulacoseira italica; Aulacoseira lirata; Aulacoseira pusilla; Aulacoseira valida; Brachysira brebissonii; Calculated; CDRILL; Climate change; Core drilling; Counting; Cyclotella pseudostelligera; DEPTH, sediment/rock; Diatom frustules; diatoms; Diatoms, epilithic/epiphytic ratio; Diatoms, epipelic; Diatoms, epiphytic; Diatoms, planktic; Diatoms, total valves, per unit sediment dry mass; Diatoms, tychoplanktic; Encyonema muelleri; ENSO; Fragilaria brevistriata; Holocene; Microspheres; MLC; Moss_Lake_center; Moss Lake, Washington, USA; Navicula bremensis; Navicula leptostriata; Nitzschia palea; PDO; Pollen; Pseudostaurosira elliptica; Pseudostaurosira neoelliptica; Sample, dry mass; Sellaphora pupula; Stauroneis lapidicola; Staurosira venter; Tabellaria flocculosa; time series analysis
    Type: Dataset
    Format: text/tab-separated-values, 2496 data points
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  • 7
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    Calibrated high-resolution XRF core-scanning data of Holocene lake sediments from Lake Sidi Ali, Middle Atlas Morocco (2023)
    PANGAEA
    Details
    Publication Date: 2024-01-25
    Description: The North African desert margin is considered one of the areas most sensitive to future climate changes. Improved knowledge about Holocene climatic variability and environmental responses on millennial to centennial scale will help to refine scenarios related to future climate changes. This data set presents calibrated XRF core scanning data (Ca, Sr, Fe, Mn, S, K, Ti) of a ~20 m long Holocene lake sediment sequence from Lake Sidi Ali located in the Middle Atlas, Morocco. The ITRAX core scanner measurements were obtained every 1 mm and calibrated with depth equal quantitative Spectro Xepos XRF data (see. Schmidt et al. 2023, doi:10.1594/PANGAEA.960365) using the multivariate log-ratio calibration model of Weltje et al. 2015 (doi:10.1007/978-94-017-9849-5_21). According to the 210Pb and pollen-based 14C chronology, the calibrated XRF scanning data have a c. annual temporal resolution.
    Keywords: Age model; Calcium; DEPTH, sediment/rock; Holocene; Iron; Itrax; Lake_Sidi_Ali_2012; Lake sediment; Manganese; Middle Atlas, Morocco; Palaeolimnology; Piston corer (ITRAX); Potassium; Silicon; Spectro Xepos XRF; Strontium; Sulfur; Titanium; Western Mediterranean; Xelerate software; X-ray fluorescence spectrometry (XRF), Spectro Xepos; followed by multivariate log-ratio calibration according to Weltje et al. (2015); XRF core scanner data; Years
    Type: Dataset
    Format: text/tab-separated-values, 178630 data points
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  • 8
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    Pollen record of sediment core MD95-2043 (2008)
    PANGAEA
    In:  Supplement to: Fletcher, William J; Sanchez Goñi, Maria Fernanda (2008): Orbital- and sub-orbital-scale climate impacts on vegetation of the western Mediterranean basin over the last 48,000 yr. Quaternary Research, 70(3), 451-464, https://doi.org/10.1016/j.yqres.2008.07.002
    Details
    Publication Date: 2024-03-06
    Description: High-resolution pollen analysis of Alborán Sea core MD95-2043 provides a 48-ka continuous vegetation record that can be directly correlated with sea surface and deep-water changes. The reliability of this record is supported by comparison with that of Padul (Sierra Nevada, Spain). Marine Isotope Stage (MIS) 3 was characterised by fluctuations in Quercus forest cover in response to Dansgaard-Oeschger climate variability. MIS 2 was characterised by the dominance of semi-desert vegetation. Despite overall dry and cold conditions during MIS 2, Heinrich events (HEs) 2 and 1 were distinguished from the last glacial maximum by more intensely arid conditions. Taxon-specific vegetation responses to a tripartite climatic structure within the HEs are observed. In MIS 1, the Bölling-Allerød was marked by rapid afforestation, while a re-expansion of semi-desert environments occurred during the Younger Dryas. The maximum development of mixed Quercus forest occurred between 11.7 and 5.4 cal ka BP, with forest decline since 5.4 cal ka BP. On orbital timescales, a long-term expansion of semi-desert vegetation from MIS 3 into MIS 2 reflects global ice-volume trends, while Holocene arboreal decline reflects summer insolation decrease. The influence of precession on the amplitude of forest development and vegetation composition is also detected.
    Keywords: Abies; Acer; AGE; Alboran Sea; Alisma-type; Alnus; Ambrosia-type; Anogramma leptophylla; Anthemis-type; Apiaceae; Arceuthobium; Artemisia; Asphodelus; Aster-type; Betula; Boraginaceae; Botrychium-type; Brassicaceae; Bupleurum-type; Buxus; Calluna; CALYPSO; Calypso Corer; Campanulaceae; Carpinus; Caryophyllaceae; Cedrus; Centaurea nigra-type; Centaurea scabiosa-type; Centaurium; Cerealia-type; Chenopodiaceae; Cirsium-type; Cistus; Concentricystes; Coriaria myrtifolia; Corylus; Counting, palynology; Crassulaceae; Cryptogramma; Cupressaceae; Cyperaceae; DEPTH, sediment/rock; Echinops; Ephedra distachya-type; Ephedra fragilis-type; Ericaceae; Erodium; Euphorbia; Fabaceae; Filipendula; Fraxinus excelsior-type; Galium-type; Gentianaceae; Geranium; Halimium; Hedera helix; Helianthemum; Hippophae; IMAGES; IMAGES I; Indeterminable: broken; Indeterminable: corroded; Indeterminable: crumpled; Indeterminable: hidden; Indeterminable: unknown; International Marine Global Change Study; Isoetes; Lamiaceae; Lemna; Liliaceae; Linum; Lygeum spartum; Lythrum; Marion Dufresne (1995); Marker, added; Marker, found; MD101; MD952043; MD95-2043; Mentha-type; Mercurialis-type; Myrica; Olea; Ophioglossum lusitanicum; Pedicularis; Phillyrea; Picea; Pilularia globulifera; Pinus; Pistacia; Plantago; Plantago lanceolata-type; Plumbaginaceae; Poaceae; Pollen, main; Pollen, main concentration; Pollen, temperate Mediterranean forest; Pollen, total; Pollen and spores; Polygonum aviculare-type; Polygonum persicaria-type; Polypodium vulgare-type; Populus; Potamogeton; Primulaceae; Quercus, deciduous-type; Quercus evergreen-type; Quercus suber-type; Ranunculaceae; Rhamnus-type; Rosaceae; Rumex; Salix; Sample volume; Sanguisorba minor; Sanguisorba officinalis; Scabiosa; Scrophulariaceae; Selaginella denticulata; Serratula-type; Spergularia-type; Spores, monolete ornamented; Spores, monolete psilate; Spores, trilete ornamented; Spores, trilete psilate; Spores, trilete reworked; Tamarix; Taraxacum; Taxa analyzed; Taxus; Thalictrum; Tilia; Typha; Ulex-type; Ulmus; Urtica; Valerianaceae; Veronica-type; Vicia-type; Vitis
    Type: Dataset
    Format: text/tab-separated-values, 33536 data points
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  • 9
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    Age-depth model from Lateglacial to late Holocene from sediment core MLC from Moss Lake, Washington, USA (2020)
    PANGAEA
    Details
    Publication Date: 2024-01-25
    Description: Accelerator mass spectrometry (AMS) radiocarbon dates were obtained for eight bulk sediment samples (pre-treated with HCl) at the NERC Radiocarbon Facility in East Kilbride. An age-depth model was constructed through Bayesian modelling using a _P_sequence_ deposition model in OxCal v.4.2.4, which included an “event free depth scale” (Staff et al., 2011) to account for the instantaneous deposition of a 4 cm thick tephra layer and interpolated ages every 1 cm.
    Keywords: AGE; Age, 14C calibrated, OxCal 4.2.4, P sequence deposition model; Age, maximum/old; Age, minimum/young; Calculated; CDRILL; Climate change; Confidence level; Core drilling; DEPTH, sediment/rock; diatoms; ENSO; Holocene; MLC; Moss_Lake_center; Moss Lake, Washington, USA; PDO; Pollen; Sample code/label; time series analysis
    Type: Dataset
    Format: text/tab-separated-values, 472 data points
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  • 10
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    Holocene oxygen isotope data from Lake Sidi Ali, Middle Atlas, Morocco (2019)
    PANGAEA
    In:  Supplement to: Zielhofer, Christoph; Köhler, Anne; Mischke, Steffen; Benkaddour, Abdelfattah; Mikdad, Abdeslam; Fletcher, William J (2019): Western Mediterranean hydro-climatic consequences of Holocene ice-rafted debris (Bond) events. Climate of the Past, 15(2), 463-475, https://doi.org/10.5194/cp-15-463-2019
    Details
    Publication Date: 2024-01-25
    Description: The data set represents an improved Holocene δ18O record from Lake Sidi Ali Middle Atlas, Morocco). We add 82 new δ18O data of adult ostracod shell material from the closely related species Fabaeformiscandona sp. and Candona sp. to improve the chronological resolution of the previous oxygen isotope record (Zielhofer et al., 2017).
    Keywords: AGE; Holocene; Lake_Sidi_Ali; Mass spectrometer, Finnigan, MAT 253; Mediterranean; Middle Atlas, Morocco; Ostracoda, δ18O; ostracods; oxygen isotope data; PCUWI; Piston corer, UWITEC
    Type: Dataset
    Format: text/tab-separated-values, 168 data points
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