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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Preprints
https://doi.org/10.5194/tc-2018-191
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2018-191
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  27 Sep 2018

27 Sep 2018

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This preprint was under review for the journal TC but the revision was not accepted.

Response of Antarctic Ice Sheet Mass Balance to Climate Change

Jingang Zhan1, Hongling Shi1, Yong Wang1, Yixin Yao1,2, and Yongbin Wu3 Jingang Zhan et al.
  • 1State Key Laboratory of Geodesy and Earth’s Dynamics, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Institute of Remote Sensing and Surveying and Mapping of Henan Province, Zhengzhou, 450003, China

Abstract. The ice record should have recorded and will likely reflect information on environmental changes such as atmospheric circulation. In this paper, 153 months of Gravity Recovery and Climate Experiment (GRACE) satellite time-varying gravity solutions were used to study the principal components of the Antarctic ice sheet mass change and their time-frequency variation. This assessment is based on complex principal component analysis and the wavelet amplitude-period spectrum method to reveal the main climatic factors that affect the change on the ice sheet. The complex principal component analysis results reveal the principal components that affect the mass change of the ice sheet; the wavelet analysis present the time-frequency variation of each component and the possible relationship between each principal component and different climatic factors. The results show that the specific climate factors represented by low-frequency signals with a period greater than 5 years dominate the changes of the Antarctic ice sheet mass balance. These climate factors are related to the abnormal sea surface temperature changes in the equatorial Pacific (Niño 1+2 region), the correlation between the low-frequency periodic signal of sea surface temperature anomalies in the equatorial Pacific and the first principal component of the ice sheet mass change in Antarctica is 0.65. The first principal component explains 85.45 % of the mass change in the ice sheet. The change in the meridional wind at 700 hPa in the South Pacific may be the key factor that determines the effect of sea surface temperature anomalies in the equatorial Pacific on the Antarctic ice sheet. The atmospheric temperature change in Antarctica is the second most important factor that affects the mass balance of the ice sheet in the area, and its contribution to the mass balance of the ice sheet is only 6.35 %. This result means that with the increase of low-frequency signals during the El Niño period, Antarctic ice sheet mass changes may intensify.

Jingang Zhan et al.

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Jingang Zhan et al.

Jingang Zhan et al.

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Short summary
Ice record recorded environmental change information such as atmospheric circulation. We assessment the main climatic factors that affect the ice sheet change using GRACE data. The results indicate that the low-frequency signals of SSTA in the Niño region is the major factors, temperature changes in the Antarctica have little effect on mass loss. The change in the meridional wind at 700 hPa in the South Pacific may be the key factor that determines the effect of SSTA on the Antarctic ice sheet.
Ice record recorded environmental change information such as atmospheric circulation. We...
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