Preprints
https://doi.org/10.5194/cp-2022-30
https://doi.org/10.5194/cp-2022-30
 
04 Apr 2022
04 Apr 2022
Status: this preprint is currently under review for the journal CP.

How changing the height of the Antarctic ice sheet affects global climate: A mid-Pliocene case study

Xiaofang Huang1,2, Shiling Yang1,2,3, Alan Haywood4, Julia Tindall4, Dabang Jiang5,3, Yongda Wang1,2,3, Minmin Sun1,2,3, and Shihao Zhang1,2,3 Xiaofang Huang et al.
  • 1Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
  • 2CAS Center for Excellence in Life and Paleoenvironment, Beijing, 100044, China
  • 3College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • 4School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK
  • 5Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Abstract. Warming-induced topographic changes of the East Antarctic Ice Sheet (EAIS) could have significant influence on the climate. However, how large changes in the EAIS height could theoretically affect global climate have yet to be studied. Here, the influence of possible height changes of the EAIS on climate is investigated through numerical climate modeling, using the Pliocene as a test case. As expected, the investigation reveals that the reduction of ice sheet height leads to a warmer and wetter East Antarctica. However, unintuitively, both the surface air temperature and the sea surface temperature decrease over the rest of the globe. These temperature changes result from the higher air pressure over Antarctica and the corresponding lower air pressure over extra-Antarctic regions with the reduction of EAIS height. This topography effect is further confirmed by energy balance analyses. These findings could provide insights into future climate change caused by warming-induced height reduction of the Antarctic ice sheet.

Xiaofang Huang et al.

Status: open (until 30 May 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Xiaofang Huang et al.

Xiaofang Huang et al.

Viewed

Total article views: 367 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
289 72 6 367 3 3
  • HTML: 289
  • PDF: 72
  • XML: 6
  • Total: 367
  • BibTeX: 3
  • EndNote: 3
Views and downloads (calculated since 04 Apr 2022)
Cumulative views and downloads (calculated since 04 Apr 2022)

Viewed (geographical distribution)

Total article views: 358 (including HTML, PDF, and XML) Thereof 358 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Discussed

Latest update: 20 May 2022
Download
Short summary
The sensitivity of climate to the height changes of East Antarctic ice sheet (EAIS) during the mid-Pliocene has been conducted using the HadCM3 model. The results show that the height reduction of EAIS leads to a warmer and wetter East Antarctica. However, unintuitively, both the surface air temperature and the sea surface temperature decrease over the rest of the globe. These findings could provide insights into future changes caused by warming-induced decay of the Antarctic ice sheet.