气候变化领域集成服务门户(CCPortal): Observed Antarctic sea ice expansion reproduced in a climate model after correcting biases in sea ice drift velocity

CCPortal

DOI	10.1038/s41467-021-21412-z
	Observed Antarctic sea ice expansion reproduced in a climate model after correcting biases in sea ice drift velocity
	Sun S.; Eisenman I.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The Antarctic sea ice area expanded significantly during 1979–2015. This is at odds with state-of-the-art climate models, which typically simulate a receding Antarctic sea ice cover in response to increasing greenhouse forcing. Here, we investigate the hypothesis that this discrepancy between models and observations occurs due to simulation biases in the sea ice drift velocity. As a control we use the Community Earth System Model (CESM) Large Ensemble, which has 40 realizations of past and future climate change that all undergo Antarctic sea ice retreat during recent decades. We modify CESM to replace the simulated sea ice velocity field with a satellite-derived estimate of the observed sea ice motion, and we simulate 3 realizations of recent climate change. We find that the Antarctic sea ice expands in all 3 of these realizations, with the simulated spatial structure of the expansion bearing resemblance to observations. The results suggest that the reason CESM has failed to capture the observed Antarctic sea ice expansion is due to simulation biases in the sea ice drift velocity, implying that an improved representation of sea ice motion is crucial for more accurate sea ice projections. © 2021, The Author(s).
语种	英语
scopus关键词	climate change; climate modeling; ice cover; ice drift; ice-ocean interaction; observational method; sea ice; Antarctica; article; climate change; motion; sea ice; simulation; velocity; Antarctica
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250767
作者单位	Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, United States; Environmental Science and Engineering, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Sun S.,Eisenman I.. Observed Antarctic sea ice expansion reproduced in a climate model after correcting biases in sea ice drift velocity[J],2021,12(1).
APA	Sun S.,&Eisenman I..(2021).Observed Antarctic sea ice expansion reproduced in a climate model after correcting biases in sea ice drift velocity.Nature Communications,12(1).
MLA	Sun S.,et al."Observed Antarctic sea ice expansion reproduced in a climate model after correcting biases in sea ice drift velocity".Nature Communications 12.1(2021).