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  • 1
    Book
    Book
    Thunderstorm tracking and monitoring of the basis of three-dimensional lightning data and conventional and polarimetric radar data : 14 Tab. (2010)
    Köln : DLR
    Details Availability
    Keywords: Hochschulschrift ; Forschungsbericht ; Gewitter ; Radarmeteorologie ; Gewitter ; Radarmeteorologie
    Type of Medium: Book
    Pages: V, 128 S. , Ill., graph. Darst.
    Edition: Als Ms. gedr.
    Series Statement: Forschungsbericht / Deutsches Zentrum für Luft- und Raumfahrt 2010,31
    DDC: 681.2
    RVK:
    UT 8000
    Language: English
    Note: Mit dt. u. engl. Zsfassung , Zugl.: München, Univ., Diss., 2010
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  • 2
    Online Resource
    Online Resource
    Vorhabenbezeichnung: ImPulsBio - Innovative methodische Plattformen für eine umweltfreundlichere, leistungsfähigere und systematische Bioprodukt- und Prozessentwicklung - Konzeptphase : Kurze Darstellung zum Verwendungsnachweis : Innovationsräume Bioökonomie : Laufzeit des Vorhabens: 01.09.2017 - 31.08.2018 : Berichtszeitraum: 01.09.2017 bis 31.08.2018 (2018)
    [Berlin] : [Technische Universität Berlin]
    Details Availability
    Keywords: Forschungsbericht ; Wirkstoff ; Produktentwicklung
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (15 Seiten, 341,03 KB)
    URL: https://doi.org/10.2314/KXP:167217872X
    DOI: 10.2314/KXP:167217872X
    Language: German
    Note: Förderkennzeichen BMBF 031B0472 , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden
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  • 3
    Online Resource
    Online Resource
    Graph-PoC - Elektronik für hochsensitive Diagnostik-PLattform auf Basis von 3D-Graphen : Abschlussbericht Graph-PoC 2022 : Projektlaufzeit: 01.04.2018-30.09.2021 (nach Verlängerung im 6 Monate) : Teilvorhaben: AVT und Funktionalisierungschemie für die PoC-Plattform = Electronics for highly sensitive diagnostic platform based on 3D graphene - Graph-PoC (2022)
    Berlin : Technische Universität Berlin
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    Keywords: Forschungsbericht ; Biosensor ; Bedside-Methode ; Mikrofluidik ; Mikroelektronik ; Sensortechnik ; Infektion ; Graphen ; Biomarker ; Schnelltest ; Blut ; Impedanzmessung
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (41 Seiten, 2,40 MB) , Illustrationen, Diagramme
    URL: https://doi.org/10.2314/KXP:1845292251
    DOI: 10.2314/KXP:1845292251
    Language: German , English
    Note: Förderkennzeichen BMBF 16ES0792K , Verbundnummer 01182217 , Paralleltitel dem englischen Berichtsblatt entnommen , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Sprachen der Zusammenfassungen: Deutsch, Englisch
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  • 4
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    Isotopic composition of terrestrial plant waxes (dD and δ¹³C of n-alkanes) of sediment core SO188_342 from the Northern Bay of Bengal for the last 18 ka (2014)
    PANGAEA
    In:  Supplement to: Contreras-Rosales, Lorena Astrid; Jennerjahn, Tim C; Tharammal, Thejna; Meyer, Vera D; Lückge, Andreas; Paul, André; Schefuß, Enno (2014): Evolution of the Indian Summer Monsoon and terrestrial vegetation in the Bengal region during the past 18 ka. Quaternary Science Reviews, 102, 133-148, https://doi.org/10.1016/j.quascirev.2014.08.010
    Details
    Publication Date: 2023-03-03
    Description: The Indian Summer Monsoon (ISM) is a major global climatic phenomenon. Long-term precipitation proxy records of the ISM, however, are often fragmented and discontinuous, impeding an estimation of the magnitude of precipitation variability from the Last Glacial to the present. To improve our understanding of past ISM variability, we provide a continuous reconstructed record of precipitation and continental vegetation changes from the lower Ganges-Brahmaputra-Meghna catchment and the Indo-Burman ranges over the last 18,000 years (18 ka). The records derive from a marine sediment core from the northern Bay of Bengal (NBoB), and are complemented by numerical model results of spatial moisture transport and precipitation distribution over the Bengal region. The isotopic composition of terrestrial plant waxes (dD and d13C of n-alkanes) are compared to results from an isotope-enabled general atmospheric circulation model (IsoCAM) for selected time slices (pre-industrial, mid-Holocene and Heinrich Stadial 1). Comparison of proxy and model results indicate that past changes in the dD of precipitation and plant waxes were mainly driven by the amount effect, and strongly influenced by ISM rainfall. Maximum precipitation is detected for the Early Holocene Climatic Optimum (EHCO; 10.5-6 ka BP), whereas minimum precipitation occurred during the Heinrich Stadial 1 (HS1; 16.9-15.4 ka BP). The IsoCAM model results support the hypothesis of a constant moisture source (i.e. the NBoB) throughout the study period. Relative to the pre-industrial period the model reconstructions show 20% more rain during the mid-Holocene (6 ka BP) and 20% less rain during the Heinrich Stadial 1 (HS1), respectively. A shift from C4-plant dominated ecosystems during the glacial to subsequent C3/C4-mixed ones during the interglacial took place. Vegetation changes were predominantly driven by precipitation variability, as evidenced by the significant correlation between the dD and d13C alkane records. When compared to other records across the ISM domain, precipitation and vegetation changes inferred from our records and the numerical model results provide evidence for a coherent regional variability of the ISM from the Last Glacial to the present.
    Keywords: Center for Marine Environmental Sciences; Leibniz Centre for Tropical Marine Research; MARUM; ZMT
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
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    Mass, inverse of mass, uncertainty in inverse of mass, F14C value and uncertainty in F14C value of standard compounds used for 14C blank assessment in compound-specific radiocarbon analysis of lipid biomarkers and lignin phenols (2020)
    PANGAEA
    Details
    Publication Date: 2023-04-22
    Description: Compound-specific radiocarbon dating often requires working with small samples of 〈 100 µg carbon (µgC). This makes the radiocarbon dates of biomarker compounds very sensitive to biases caused by extraneous carbon of unknown composition, a procedural blank, which is introduced to the samples during the steps necessary to prepare a sample for radiocarbon analysis by accelerator mass spectrometry (i.e., isolating single compounds from a heterogeneous mixture, combustion, gas purification and graphitization). Reporting accurate radiocarbon dates thus requires a correction for the procedural blank. We present our approach to assess the fraction modern carbon (F14C) and the mass of the procedural blanks introduced during the preparation procedures of lipid biomarkers (i.e. n-alkanoic acids) and lignin phenols. We isolated differently sized aliquots (6-151 µgC) of n-alkanoic acids and lignin phenols obtained from standard materials with known F14C values. Each compound class was extracted from two standard materials (one fossil, one modern) and purified using the same procedures as for natural samples of unknown F14C. There was an inverse linear relationship between the measured F14C values of the processed aliquots and their mass, which suggests constant contamination during processing of individual samples. We used Bayesian methods to fit linear regression lines between F14C and 1/mass for the fossil and modern standards. The intersection points of these lines were used to infer F14Cblank and mblank and their associated uncertainties. We estimated 4.88±0.69 μgC of procedural blank with F14C of 0.714±0.077 for n-alkanoic acids, and 0.90±0.23 μgC of procedural blank with F14C of 0.813±0.155 for lignin phenols. These F14Cblank and mblank can be used to correct AMS results of lipid and lignin samples by isotopic mass balance. This method may serve as a standardized procedure for blank assessment in small-scale radiocarbon analysis.
    Keywords: AWI_Envi; Center for Marine Environmental Sciences; MARUM; Polar Terrestrial Environmental Systems @ AWI
    Type: Dataset
    Format: application/zip, 2.5 MBytes
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  • 6
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    Mass and F14C values of standard compounds for the blank assessment for n-alkanoic acid methyl ester and lignin phenols (2020)
    PANGAEA
    Details
    Publication Date: 2023-04-22
    Keywords: AWI_Envi; Compounds; Event label; Fraction modern carbon; Fraction modern carbon, standard deviation; Laboratory code/label; Mass; Mass, standard deviation; Messel_oil_shale; Messel, Germany; OUTCROP; Outcrop sample; Polar Terrestrial Environmental Systems @ AWI; Type
    Type: Dataset
    Format: text/tab-separated-values, 205 data points
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  • 7
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    Bulk and amino acid parameters of core SO188-342KL from the Northern Bay of Bengal for the last 18 ka (2016)
    PANGAEA
    In:  Supplement to: Contreras-Rosales, Lorena Astrid; Schefuß, Enno; Meyer, Vera D; Palamenghi, Luisa; Lückge, Andreas; Jennerjahn, Tim C (2016): Origin and fate of sedimentary organic matter in the northern Bay of Bengal during the last 18 ka. Global and Planetary Change, 146, 53-66, https://doi.org/10.1016/j.gloplacha.2016.09.008
    Details
    Publication Date: 2023-01-13
    Description: The Northern Bay of Bengal (NBoB) is a globally important region for deep-sea organic matter (OM) deposition due to massive fluvial discharge from the Ganges-Brahmaputra-Meghna (G-B-M) rivers and moderate to high surface productivity. Previous studies have focused on carbon burial in turbiditic sediments of the Bengal Fan. However, little is known about the storage of carbon in pelagic and hemipelagic sediments of the Bay of Bengal over millennial time scales. This study presents a comprehensive history of OM origin and fate as well as a quantification of carbon sediment storage in the Eastern Bengal Slope (EBS) during the last 18 ka. Bulk organic proxies (TOC, TIC, TN, d13CTOC, d15NTN) and content and composition of total hydrolysable amino acids (THAA) in a sediment core (SO188-342KL) from the EBS were analyzed. Three periods of high OM accumulation were identified: the Late Glacial (LG), the Bölling/Alleröd (B/A), and the Early Holocene Climatic Optimum (EHCO). Lower eustatic sea level before 15 ka BP allowed a closer connection between the EBS and the fluvial debouch, favoring high terrestrial OM input to the core site. This connection was progressively lost between 15 and 7 ka BP as sea level rose to its present height and terrestrial OM input decreased considerably. Export and preservation of marine OM was stimulated during periods of summer monsoon intensification (B/A and EHCO) as a consequence of higher surface productivity enhanced by cyclonic-eddy nutrient pumping and fluvial nutrient delivery into the photic zone. Changes in the THAA composition indicate that the marine plankton community structure shifted from calcareous-dominated before 13 ka BP to siliceous-dominated afterwards. They also indicate that the relative proportion of marine versus terrestrial OM deposited at site 342KL was primarily driven by relative sea level and enlarged during the Holocene. The ballasting effect of lithogenic particles during periods of high coastal proximity and/or enhanced fluvial discharge promoted the export and preservation of OM. The high organic carbon accumulation rates in the EBS during the LG (18-17 ka BP) were 5-fold higher than at present and comparable to those of glacial upwelling areas. Despite the differences in sediment and OM transport and storage among the Western and Eastern sectors of the NBoB, this region remains important for global carbon sequestration during sea level low-stands. In addition, the summer monsoon was a key promotor of terrestrial and marine OM export to the deep-ocean, highlighting its relevance as regulator of the global carbon budget.
    Keywords: Leibniz Centre for Tropical Marine Research; ZMT
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 8
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    Biomarker and compound-specific radiocarbon data in sediment cores from the Bering Sea and the Northwest Pacific (2019)
    PANGAEA
    In:  Supplement to: Meyer, Vera D; Hefter, Jens; Köhler, Peter; Tiedemann, Ralf; Gersonde, Rainer; Wacker, Lukas; Mollenhauer, Gesine (2019): Permafrost-carbon mobilization in Beringia caused by deglacial meltwater runoff, sea-level rise and warming. Environmental Research Letters, 14(8), 085003, https://doi.org/10.1088/1748-9326/ab2653
    Details
    Publication Date: 2023-01-13
    Description: The dataset comprises contents, mass-accumulation rates and compound-specific radiocarbon data of several terrigenous biomarkers in sediment cores from the Northwest Pacific (core SO201-2-12KL) and the Bering Sea (cores SO201-2-114KL, SO202/1_18-6 and SO202/1_18-3). The dataset includes contents and mass accumulation rates of high molecular weight n-alkanoic acids, high molecular weight n-alkanes and branched glycerol dialkyl glycerol tetraethers. Moreover, contents and fractional abundances of homohopane isomers are given. Contents are calculated relative to total organic carbon contents and to the dry weight of the sediment. The dataset also contains Paq values and the carbon preference indices of n-alkanoic acids and n-alkanes. Compound-specific radiocarbon data have been obtained from high molecular weight n-alkanoic acids (n-C26:0 alkanoic acid) and high molecular weight n-alkanes (n-C23, n-C27 and n-C29 alkanes). The F14C has been corrected for procedural blanks associated with the isolation of the biomarkers. The data compilation contains the measured (AMS-results) as well as the blank-corrected F14C values. The 14C-data are reported with the 1sigma uncertainty.
    Type: Dataset
    Format: application/zip, 12 datasets
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  • 9
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    Fractional abundances and concentrations of branched glycerol dialkyl glycerol tetraethers (brGDGT) of core SO201-2-12KL (2017)
    PANGAEA
    In:  Supplement to: Meyer, Vera D; Hefter, Jens; Lohmann, Gerrit; Max, Lars; Tiedemann, Ralf; Mollenhauer, Gesine (2017): Summer temperature evolution on the Kamchatka Peninsula, Russian Far East, during the past 20000 years. Climate of the Past, 13(4), 359-377, https://doi.org/10.5194/cp-13-359-2017
    Details
    Publication Date: 2023-03-16
    Description: Little is known about the climate evolution on the Kamchatka Peninsula during the last glacial?interglacial transition as existing climate records do not reach beyond 12 ka BP. In this study, a summer temperature record for the past 20 kyr is presented. Branched glycerol dialkyl glycerol tetraethers, terrigenous biomarkers suitable for continental air temperature reconstructions, were analyzed in a sediment core from the western continental margin off Kamchatka in the marginal northwest Pacific (NW Pacific). The record suggests that summer temperatures on Kamchatka during the Last Glacial Maximum (LGM) equaled modern temperatures. We suggest that strong southerly winds associated with a pronounced North Pacific High pressure system over the subarctic NW Pacific accounted for the warm conditions. A comparison with an Earth system model reveals discrepancies between model and proxy-based reconstructions for the LGM temperature and atmospheric circulation in the NW Pacific realm. The deglacial temperature development is characterized by abrupt millennial-scale temperature oscillations. The Bølling?Allerød warm phase and the Younger Dryas cold spell are pronounced events, suggesting a connection to North Atlantic climate variability.
    Keywords: AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
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    Fractional abundances of isoprenoid and branched glycerol dialkyl glycerol tetraethers (GDGT) of cores SO201-2-12KL and SO201-2-114KL (2016)
    PANGAEA
    In:  Supplement to: Meyer, Vera D; Max, Lars; Hefter, Jens; Tiedemann, Ralf; Mollenhauer, Gesine (2016): Glacial-to-Holocene evolution of sea surface temperature and surface circulation in the subarctic northwest Pacific and the Western Bering Sea. Paleoceanography, 31, 12 pp, https://doi.org/10.1002/2015PA002877
    Details
    Publication Date: 2023-03-16
    Description: It has been proposed that North Pacific sea surface temperature (SST) evolution was intimately linked to North Atlantic climate oscillations during the last glacial-interglacial transition. However, during the early deglaciation and the Last Glacial Maximum, the SST development in the subarctic northwest Pacific and the Bering Sea is poorly constrained as most existing deglacial SST records are based on alkenone paleothermometry, which is limited prior to 15 ka B.P. in the subarctic North Pacific realm. By applying the TEXL86 temperature proxy we obtain glacial-Holocene-SST records for the marginal northwest Pacific and the Western Bering Sea. Our TEXL86-based records and existing alkenone data suggest that during the past 15.5 ka, SSTs in the northwest Pacific and the Western Bering Sea closely followed millennial-scale climate fluctuations known from Greenland ice cores, indicating rapid atmospheric teleconnections with abrupt climate changes in the North Atlantic. Our SST reconstructions indicate that in the Western Bering Sea SSTs drop significantly during Heinrich Stadial 1 (HS1), similar to the known North Atlantic climate history. In contrast, progressively rising SST in the northwest Pacific is different to the North Atlantic climate development during HS1. Similarities between the northwest Pacific SST and climate records from the Gulf of Alaska point to a stronger influence of Alaskan Stream waters connecting the eastern and western basin of the North Pacific during this time. During the Holocene, dissimilar climate trends point to reduced influence of the Alaskan Stream in the northwest Pacific.
    Keywords: AWI_Paleo; Paleoenvironmental Reconstructions from Marine Sediments @ AWI
    Type: Dataset
    Format: application/zip, 2 datasets
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