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  1. Book ; Online: Stable oxygen isotope record from Greenland ice cores, supplementary data to: Vinther, Bo M; Jones, Phil D; Briffa, Keith R; Clausen, Henrik B; Andersen, Katrine K; Dahl-Jensen, Dorthe; Johnsen, Sigfus J (2010): Climatic signals in multiple highly resolved stable isotope records from Greenland. Quaternary Science Reviews, 29(3-4), 522-538

    Vinther, Bo M / Andersen, Katrine K / Briffa, Keith R / Clausen, Henrik B / Dahl-Jensen, Dorthe / Johnsen, Sigfus J / Jones, Phil D

    2010  

    Abstract: Twenty ice cores drilled in medium to high accumulation areas of the Greenland ice sheet have been used to extract seasonally resolved stable isotope records. Relationships between the seasonal stable isotope data and Greenland and Icelandic temperatures ...

    Abstract Twenty ice cores drilled in medium to high accumulation areas of the Greenland ice sheet have been used to extract seasonally resolved stable isotope records. Relationships between the seasonal stable isotope data and Greenland and Icelandic temperatures as well as atmospheric flow are investigated for the past 150-200 years. The winter season stable isotope data are found to be influenced by the North Atlantic Oscillation (NAO) and very closely related to SW Greenland temperatures. The linear correlation between the first principal component of the winter season stable isotope data and Greenland winter temperatures is 0.71 for seasonally resolved data and 0.83 for decadally filtered data. The summer season stable isotope data display higher correlations with Stykkisholmur summer temperatures and North Atlantic SST conditions than with SW Greenland temperatures. The linear correlation between Stykkisholmur summer temperatures and the first principal component of the summer season stable isotope data is 0.56, increasing to 0.66 for decadally filtered data.
    Winter season stable isotope data from ice core records that reach more than 1400 years back in time suggest that the warm period that began in the 1920s raised southern Greenland temperatures to the same level as those that prevailed during the warmest intervals of the Medieval Warm Period some 900-1300 years ago. This observation is supported by a southern Greenland ice core borehole temperature inversion. As Greenland borehole temperature inversions are found to correspond better with winter stable isotope data than with summer or annual average stable isotope data it is suggested that a strong local Greenland temperature signal can be extracted from the winter stable isotope data even on centennial to millennial time scales.
    Language English
    Dates of publication 2010-9999
    Size Online-Ressource
    Publisher PANGAEA - Data Publisher for Earth & Environmental Science
    Publishing place Bremen/Bremerhaven
    Document type Book ; Online
    Note This dataset is supplement to doi:10.1016/j.quascirev.2009.11.002
    DOI 10.1594/PANGAEA.786362
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  2. Book ; Online: Stable isotope stacks from GRIP and GISP ice cores, supplementary data to: Steig, Eric J; Grootes, Pieter Meiert; Stuiver, Minze (1994): Seasonal precipitation timing and ice core records. Science, 266(5192), 1885-1886

    White, James WC / Barlow, L K / Clausen, Henrik B / Fisher, D / Grootes, Pieter Meiert / Johnsen, Sigfus J / Jouzel, Jean / Stuiver, Minze

    2009  

    Abstract: Recent efforts to link the isotopic composition of snow in Greenland with meteorological and climatic parameters have indicated that relatively local information such as observed annual temperatures from coastal Greenland sites, as well as more synoptic ... ...

    Abstract Recent efforts to link the isotopic composition of snow in Greenland with meteorological and climatic parameters have indicated that relatively local information such as observed annual temperatures from coastal Greenland sites, as well as more synoptic scale features such as the North Atlantic Oscillation (NAO) and the temperature seesaw between Jakobshaven, Greenland, and Oslo, Norway, are significantly correlated with d18O and dD values from the past few hundred years measured in ice cores. In this study we review those efforts and then use a new record of isotope values from the Greenland Ice Sheet Project 2 and Greenland Ice Core Project sites at Summit, Greenland, to compare with meteorological and climatic parameters. This new record consists of six individual annually resolved isotopic records which have been average to produce a Summit stacked isotope record. The stacked record is significantly correlated with local Greenland temperatures over the past century (r=0.471), as well as a number of other records including temperatures and pressures from specific locations as well as temperature and pressure patterns such as the temperature seesaw and the North Atlantic Oscillation. A multiple linear regression of the stacked isotope record with a number of meteorological and climatic parameters in the North Atlantic region reveals that five variables contribute significantly to the variance in the isotope record: winter NAO, solar irradiance (as recorded by sunspot numbers), average Greenland coastal temperature, sea surface temperature in the moisture source region for Summit (30?-20?N), and the annual temperature seesaw between Jakobshaven and Oslo. Combined, these variables yield a correlation coefficient of r=0.71, explaining half of the variance in the stacked isotope record.

    REFERENCE:
    Stuiver, Minze; Grootes, Pieter Meiert; Braziunas, TF (1995): The GISP2 d18O Climate Record of the Past 16,500 Years and the Role of the Sun, Ocean, and Volcanoes. Quaternary Research, 44(3), 341-354
    White, James WC; Barlow, L K; Fisher, D; Grootes, Pieter Meiert; Jouzel, Jean; Johnsen, Sigfus J; Stuiver, Minze; Clausen, Henrik B (1997): The climate signal in the stable isotopes of snow from Summit, Greenland: Results of comparisons with modern climate observations. Journal of Geophysical Research-Oceans, 102(C12), 26425-26440
    GRIP/GISP (1997): The Greenland Summit Ice Cores CD-ROM and new data archived since 1998. National Snow and Ice Data Center, University of Colorado at Boulder, and World Data Center for Paleoclimatology, National Geophysical Data Center, Boulder Colorado
    Language English
    Dates of publication 2009-9999
    Size Online-Ressource
    Publisher PANGAEA - Data Publisher for Earth & Environmental Science
    Publishing place Bremen/Bremerhaven
    Document type Book ; Online
    Note This dataset is cited by doi:10.1006/qres.1995.1079 ; This dataset is cited by doi:10.1029/97JC00162 ; This dataset is supplement to doi:10.1126/science.266.5192.1885
    DOI 10.1594/PANGAEA.716878
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  3. Book ; Online: (Data D1) Annual climate proxy data from the NGRIP ice core, Greenland, supplementary data to: Steffensen, Jørgen Peder; Andersen, Katrine K; Bigler, Matthias; Clausen, Henrik B; Dahl-Jensen, Dorthe; Fischer, Hubertus; Goto-Azuma, Kumiko; Hansson, Margareta E; Johnsen, Sigfus J; Jouzel, Jean; Masson-Delmotte, Valerie; Popp, Trevor; Rasmussen, Sune O; Röthlisberger, Regine; Ruth, Urs; Stauffer, Bernhard; Siggaard-Andersen, Marie-Louise; Sveinbjörnsdottir, Arny E; Svensson, Anders M; White, James WC (2008): High-resolution Greenland ice core data show abrupt climate change happens in few years. Science, 321(5889), 680-684

    Steffensen, Jørgen Peder / Andersen, Katrine K / Bigler, Matthias / Clausen, Henrik B / Dahl-Jensen, Dorthe / Fischer, Hubertus / Goto-Azuma, Kumiko / Hansson, Margareta E / Johnsen, Sigfus J / al., et

    2008  

    Abstract: The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a ... ...

    Abstract The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a proxy of Greenland precipitation moisture source, switched mode within 1 to 3 years over these transitions and initiated a more gradual change (over 50 years) of the Greenland air temperature, as recorded by stable water isotopes. The onsets of both abrupt Greenland warmings were slightly preceded by decreasing Greenland dust deposition, reflecting the wetting of Asian deserts. A northern shift of the Intertropical Convergence Zone could be the trigger of these abrupt shifts of Northern Hemisphere atmospheric circulation, resulting in changes of 2 to 4 kelvin in Greenland moisture source temperature from one year to the next.
    Language English
    Dates of publication 2008-9999
    Size Online-Ressource
    Publisher PANGAEA - Data Publisher for Earth & Environmental Science
    Publishing place Bremen/Bremerhaven
    Document type Book ; Online
    Note This dataset is supplement to doi:10.1126/science.1157707
    DOI 10.1594/PANGAEA.786474
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  4. Article ; Online: A stratigraphic framework for abrupt climatic changes during the Last Glacial period based on three synchronized Greenland ice-core records

    Rasmussen, Sune O. / Bigler, Matthias / Blockley, Simon P. / Blunier, Thomas / Buchardt, Susanne L. / Clausen, Henrik B. / Cvijanovic, Ivana / Dahl-Jensen, Dorthe / Johnsen, Sigfus J. / Fischer, Hubertus / Gkinis, Vasileios / Guillevic, Myriam / Hoek, Wim Z. / Lowe, J. John / Pedro, Joel B. / Popp, Trevor / Seierstad, Inger K. / Steffensen, Jørgen Peder / Svensson, Anders M. /
    Vallelonga, Paul / Vinther, Bo M. / Walker, Mike J.C. / Wheatley, Joe J. / Winstrup, Mai

    refining and extending the INTIMATE event stratigraphy

    2014  

    Abstract: Due to their outstanding resolution and well-constrained chronologies, Greenland ice-core records provide a master record of past climatic changes throughout the Last InterglacialeGlacial cycle in the North Atlantic region. As part of the INTIMATE ( ... ...

    Abstract Due to their outstanding resolution and well-constrained chronologies, Greenland ice-core records provide a master record of past climatic changes throughout the Last InterglacialeGlacial cycle in the North Atlantic region. As part of the INTIMATE (INTegration of Ice-core, MArine and TErrestrial records) project, protocols have been proposed to ensure consistent and robust correlation between different records of past climate. A key element of these protocols has been the formal definition and ordinal numbering of the sequence of Greenland Stadials (GS) and Greenland Interstadials (GI) within the most recent glacial period. The GS and GI periods are the Greenland expressions of the characteristic DansgaardeOeschger events that represent cold and warm phases of the North Atlantic region, respectively. We present here a more detailed and extended GS/GI template for the whole of the Last Glacial period. It is based on a synchronization of the NGRIP, GRIP, and GISP2 ice-core records that allows the parallel analysis of all three records on a common time scale. The boundaries of the GS and GI periods are defined based on a combination of stable-oxygen isotope ratios of the ice (d18O, reflecting mainly local temperature) and calcium ion concentrations (reflecting mainly atmospheric dust loading) measured in the ice. The data not only resolve the well-known sequence of DansgaardeOeschger events that were first defined and numbered in the ice-core records more than two decades ago, but also better resolve a number of short-lived climatic oscillations, some defined here for the first time. Using this revised scheme, we propose a consistent approach for discriminating and naming all the significant abrupt climatic events of the Last Glacial period that are represented in the Greenland ice records. The final product constitutes an extended and better resolved Greenland stratotype sequence, against which other proxy records can be compared and correlated. It also provides a more secure basis for investigating the dynamics ...
    Subject code 005
    Language English
    Publisher Elsevier
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: High-resolution Greenland ice core data show abrupt climate change happens in few years.

    Steffensen, Jørgen Peder / Andersen, Katrine K / Bigler, Matthias / Clausen, Henrik B / Dahl-Jensen, Dorthe / Fischer, Hubertus / Goto-Azuma, Kumiko / Hansson, Margareta / Johnsen, Sigfús J / Jouzel, Jean / Masson-Delmotte, Valérie / Popp, Trevor / Rasmussen, Sune O / Röthlisberger, Regine / Ruth, Urs / Stauffer, Bernhard / Siggaard-Andersen, Marie-Louise / Sveinbjörnsdóttir, Arny E / Svensson, Anders /
    White, James W C

    Science (New York, N.Y.)

    2008  Volume 321, Issue 5889, Page(s) 680–684

    Abstract: The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a ... ...

    Abstract The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a proxy of Greenland precipitation moisture source, switched mode within 1 to 3 years over these transitions and initiated a more gradual change (over 50 years) of the Greenland air temperature, as recorded by stable water isotopes. The onsets of both abrupt Greenland warmings were slightly preceded by decreasing Greenland dust deposition, reflecting the wetting of Asian deserts. A northern shift of the Intertropical Convergence Zone could be the trigger of these abrupt shifts of Northern Hemisphere atmospheric circulation, resulting in changes of 2 to 4 kelvin in Greenland moisture source temperature from one year to the next.
    Language English
    Publishing date 2008-08-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.1157707
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: High-Resolution Greenland Ice Core Data Show Abrupt Climate Change Happens in Few Years

    Steffensen, Jørgen Peder / Andersen, Katrine K / Bigler, Matthias / Clausen, Henrik B / Dahl-Jensen, Dorthe / Fischer, Hubertus / Goto-Azuma, Kumiko / Hansson, Margareta / Johnsen, Sigfús J / Jouzel, Jean / Masson-Delmotte, Valérie / Popp, Trevor / Röthlisberger, Regine / Rasmussen, Sune O / Ruth, Urs / Siggaard-Andersen, Marie-Louise / Stauffer, Bernhard / Sveinbjörnsdóttir, Árný E / Svensson, Anders /
    White, James W.C

    Science. 2008 Aug. 1, v. 321, no. 5889

    2008  

    Abstract: The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a ... ...

    Abstract The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a proxy of Greenland precipitation moisture source, switched mode within 1 to 3 years over these transitions and initiated a more gradual change (over 50 years) of the Greenland air temperature, as recorded by stable water isotopes. The onsets of both abrupt Greenland warmings were slightly preceded by decreasing Greenland dust deposition, reflecting the wetting of Asian deserts. A northern shift of the Intertropical Convergence Zone could be the trigger of these abrupt shifts of Northern Hemisphere atmospheric circulation, resulting in changes of 2 to 4 kelvin in Greenland moisture source temperature from one year to the next.
    Keywords air temperature ; atmospheric circulation ; climate change ; cooling ; deserts ; deuterium ; dust ; ice ; isotopes ; Greenland
    Language English
    Dates of publication 2008-0801
    Size p. 680-684.
    Publishing place American Association for the Advancement of Science
    Document type Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.1157707
    Database NAL-Catalogue (AGRICOLA)

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