Antarctic surface temperature and elevation during the Last Glacial Maximum
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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Antarctic surface temperature and elevation during the Last Glacial Maximum. / Buizert, Christo; Fudge, T. J.; Roberts, William H. G.; Steig, Eric J.; Sherriff-Tadano, Sam; Ritz, Catherine; Lefebvre, Eric; Edwards, Jon; Kawamura, Kenji; Oyabu, Ikumi; Motoyama, Hideaki; Kahle, Emma C.; Jones, Tyler R.; Abe-Ouchi, Ayako; Obase, Takashi; Martin, Carlos; Corr, Hugh; Severinghaus, Jeffrey P.; Beaudette, Ross; Epifanio, Jenna A.; Brook, Edward J.; Martin, Kaden; Chappellaz, Jerome; Aoki, Shuji; Nakazawa, Takakiyo; Sowers, Todd A.; Alley, Richard B.; Ahn, Jinho; Sigl, Michael; Severi, Mirko; Dunbar, Nelia W.; Svensson, Anders; Fegyveresi, John M.; He, Chengfei; Liu, Zhengyu; Zhu, Jiang; Otto-Bliesner, Bette L.; Lipenkov, Vladimir Y.; Kageyama, Masa; Schwander, Jakob.
I: Science, Bind 372, Nr. 6546, 04.06.2021, s. 1097-1101.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Antarctic surface temperature and elevation during the Last Glacial Maximum
AU - Buizert, Christo
AU - Fudge, T. J.
AU - Roberts, William H. G.
AU - Steig, Eric J.
AU - Sherriff-Tadano, Sam
AU - Ritz, Catherine
AU - Lefebvre, Eric
AU - Edwards, Jon
AU - Kawamura, Kenji
AU - Oyabu, Ikumi
AU - Motoyama, Hideaki
AU - Kahle, Emma C.
AU - Jones, Tyler R.
AU - Abe-Ouchi, Ayako
AU - Obase, Takashi
AU - Martin, Carlos
AU - Corr, Hugh
AU - Severinghaus, Jeffrey P.
AU - Beaudette, Ross
AU - Epifanio, Jenna A.
AU - Brook, Edward J.
AU - Martin, Kaden
AU - Chappellaz, Jerome
AU - Aoki, Shuji
AU - Nakazawa, Takakiyo
AU - Sowers, Todd A.
AU - Alley, Richard B.
AU - Ahn, Jinho
AU - Sigl, Michael
AU - Severi, Mirko
AU - Dunbar, Nelia W.
AU - Svensson, Anders
AU - Fegyveresi, John M.
AU - He, Chengfei
AU - Liu, Zhengyu
AU - Zhu, Jiang
AU - Otto-Bliesner, Bette L.
AU - Lipenkov, Vladimir Y.
AU - Kageyama, Masa
AU - Schwander, Jakob
PY - 2021/6/4
Y1 - 2021/6/4
N2 - Water-stable isotopes in polar ice cores are a widely used temperature proxy in paleoclimate reconstruction, yet calibration remains challenging in East Antarctica. Here, we reconstruct the magnitude and spatial pattern of Last Glacial Maximum surface cooling in Antarctica using borehole thermometry and firn properties in seven ice cores. West Antarctic sites cooled similar to 10 degrees C relative to the preindustrial period. East Antarctic sites show a range from similar to 4 degrees to similar to 7 degrees C cooling, which is consistent with the results of global climate models when the effects of topographic changes indicated with ice core air-content data are included, but less than those indicated with the use of water-stable isotopes calibrated against modern spatial gradients. An altered Antarctic temperature inversion during the glacial reconciles our estimates with water-isotope observations.
AB - Water-stable isotopes in polar ice cores are a widely used temperature proxy in paleoclimate reconstruction, yet calibration remains challenging in East Antarctica. Here, we reconstruct the magnitude and spatial pattern of Last Glacial Maximum surface cooling in Antarctica using borehole thermometry and firn properties in seven ice cores. West Antarctic sites cooled similar to 10 degrees C relative to the preindustrial period. East Antarctic sites show a range from similar to 4 degrees to similar to 7 degrees C cooling, which is consistent with the results of global climate models when the effects of topographic changes indicated with ice core air-content data are included, but less than those indicated with the use of water-stable isotopes calibrated against modern spatial gradients. An altered Antarctic temperature inversion during the glacial reconciles our estimates with water-isotope observations.
KW - ABRUPT CLIMATE-CHANGE
KW - EPICA DOME-C
KW - ATMOSPHERIC NITROUS-OXIDE
KW - CORE WD2014 CHRONOLOGY
KW - VOSTOK ICE CORE
KW - AIR-CONTENT
KW - SIPLE DOME
KW - POLAR ICE
KW - VOLCANIC SYNCHRONIZATION
KW - ISOTOPIC COMPOSITION
U2 - 10.1126/science.abd2897
DO - 10.1126/science.abd2897
M3 - Journal article
C2 - 34083489
VL - 372
SP - 1097
EP - 1101
JO - Science
JF - Science
SN - 0036-8075
IS - 6546
ER -
ID: 272510273