气候变化领域集成服务门户(CCPortal): ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica

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DOI	10.1029/2020JD033140
	ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica
	Isaacs F.E.; Renwick J.A.; Mackintosh A.N.; Dadic R.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	Antarctica’s sea ice cover is an important component of the global climate system, yet the drivers of sea ice variability are not well understood. Here we investigated the effects of climate variability on sea ice concentration (SIC) around East Antarctica by correlating the 40-years (1979–2018) satellite sea ice record and ERA5 reanalysis data. We found that summer and autumn SIC around Dronning Maud Land (DML) between 10 and 70°E exhibited a statistically significant negative correlation with the Niño 3.4 index. Sea ice in DML was also correlated with sea surface temperature (SST) anomalies in the tropical Pacific, and to an atmospheric wave train pattern extending from the South Pacific to DML. We suggest that a southward-propagating atmospheric wave train triggered by SST anomalies in the tropical Pacific extends into DML and alters sea ice concentration by encouraging meridional airflow. Our results showed that shifts in meridional flow in DML affected sea ice thermodynamically, by altering local heat transport and in turn altering sea ice formation and melt. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	climate variability; East Antarctica; ENSO; sea ice
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185435
作者单位	Antarctic Research Centre, School of Geography, Environment, and Earth Science, Victoria University of Wellington, Wellington, New Zealand; School of Earth, Atmosphere, and Environment, Monash University, Melbourne, VIC, Australia
推荐引用方式 GB/T 7714	Isaacs F.E.,Renwick J.A.,Mackintosh A.N.,et al. ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica[J],2021,126(5).
APA	Isaacs F.E.,Renwick J.A.,Mackintosh A.N.,&Dadic R..(2021).ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Isaacs F.E.,et al."ENSO Modulates Summer and Autumn Sea Ice Variability Around Dronning Maud Land, Antarctica".Journal of Geophysical Research: Atmospheres 126.5(2021).