Early Pleistocene East Antarctic temperature in phase with local insolation
Early Pleistocene East Antarctic temperature in phase with local insolation
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早更新世南极东部温度与局部日照同步
DOI：
10.1038/s41561-022-01095-x
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发表时间：
2022
影响因子：
18.3
通讯作者：
Higgins, John A.
中科院分区：
文献类型：
--
作者：
Yan, Yuzhen;Kurbatov, Andrei V.;Mayewski, Paul A.;Shackleton, Sarah;Higgins, John A.
更新世冰期-间冰期旋回被假设为通过地球轨道参数对北方半球夏季日照的影响而被调制。地球自转轴倾斜度的变化可以解释早更新世41,000年的冰川循环。然而，19，000年和23，000年的频率与地球自转轴从这些周期中的岁差相对应的缺失仍然是个谜。在这里，我们调查这些轨道强迫可能已经改变了开发的日射代理的基础上收集的艾伦山蓝冰区在南极洲东部的冰芯样品中捕获的气体的氧氮比。我们发现，东南极温度与当地，南半球夏季日照在早更新世呈正相关，而这种相关性在晚更新世成为负，只有后者是与以前的研究结果一致，即北方半球日照节奏南极气候。如果早更新世的冰量和当地南极温度共同变化，我们的结果支持的假设，属性没有岁差在41,000年的冰川周期，以取消岁差频率在半球冰量的变化，是响应当地的日照，这表明一个更动态的东南极冰盖在早更新世比在过去的80万年。
Pleistocene glacial–interglacial cycles are hypothesized to be modulated by Earth’s orbital parameters through their influence on the Northern Hemisphere summer insolation. Changes in obliquity—Earth’s axial tilt—can explain the 41,000-year glacial cycles in the Early Pleistocene. However, the absence of 19,000- and 23,000-year frequencies corresponding to Earth’s precession of the rotation axis from those cycles remains enigmatic. Here we investigate how these orbital forcings may have changed by developing an insolation proxy based on the oxygen-to-nitrogen ratio of gases trapped in ice core samples collected from the Allan Hills Blue Ice Area in East Antarctica. We find that East Antarctic temperature was positively correlated with local, Southern Hemisphere summer insolation in the Early Pleistocene, while this correlation became negative in the late Pleistocene, with only the latter being consistent with the previous findings that Northern Hemisphere insolation paced Antarctic climate. If Early Pleistocene ice volume and local Antarctic temperature co-varied, our result supports the hypothesis that attributes the absence of precession in the 41,000-year glacial cycles to cancellation of precession frequencies in hemispheric ice volume changes that are responding to local insolation, suggesting a more dynamic East Antarctic Ice Sheet in the Early Pleistocene than in the past 800,000 years.
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影响因子：
4.3
作者：
Yuzhen Yan;N. Spaulding;M. Bender;E. Brook;J. Higgins;A. Kurbatov;P. Mayewski
通讯作者：
Yuzhen Yan;N. Spaulding;M. Bender;E. Brook;J. Higgins;A. Kurbatov;P. Mayewski
南极洲艾伦山蓝冰区的冰运动和质量平衡对古气候重建的影响
影响因子：
3.4
作者：
SPAULDING, Nicole E.;SPIKES, Vandy B.;HAMILTON, Gordon S.;MAYEWSKI, Paul A.;DUNBAR, Nelia W.;HARVEY, Ralph P.;SCHUTT, John;KURBATOV, Andrei V.
通讯作者：
KURBATOV, Andrei V.
南极洲富士圆顶层状雪的变质作用：气泡关闭期间气体传输条件的局部日照调节机制
DOI：
--
发表时间：
2009
期刊：
Journal of Geophysical Research-Earth Surface 114,F03023
影响因子：
--
作者：
Fujita S.;J.Okuyama;A.Hori;T.Hondoh
通讯作者：
T.Hondoh
影响因子：
64.8
作者：
Yuzhen Yan;M. Bender;E. Brook;H. Clifford;P. Kemeny;A. Kurbatov;Sean L. Mackay;P. Mayewski;J. Ng;J. Severinghaus;J. Higgins
通讯作者：
Yuzhen Yan;M. Bender;E. Brook;H. Clifford;P. Kemeny;A. Kurbatov;Sean L. Mackay;P. Mayewski;J. Ng;J. Severinghaus;J. Higgins
影响因子：
3.4
作者：
Dadic, Ruzica;Schneebeli, Martin;Matzl, Margret
通讯作者：
Matzl, Margret