Attribution of the Record-Breaking Extreme Cold Event Over Northern East Asia in December 2023

被引：3
作者：
Gong, Hainan [1 ,2 ]
Ma, Kangjie [1 ,3 ]
Wang, Lin [1 ,2 ]
Chen, Wen [4 ]
机构：
[1] Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, Beijing, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Nanjing, Peoples R China
[3] Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
[4] Yunnan Univ, Dept Atmospher Sci, Kunming, Peoples R China
来源：
GEOPHYSICAL RESEARCH LETTERS | 2024年 / 51卷 / 23期
基金：
中国国家自然科学基金;
关键词：
extreme cold events; atmospheric teleconnection; Arctic-midlatitude linkage; Attribution; East Asia; internal variability; ARCTIC SEA-ICE; ATMOSPHERIC CIRCULATION; LOW-TEMPERATURE; SOUTHERN CHINA; SNOW COVER; WINTER; VARIABILITY; JANUARY; MONSOON; TELECONNECTIONS;
D O I：
10.1029/2024GL112568
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Against the backdrop of global warming, Northern East Asia experienced a record-breaking extreme cold event during December 13 to 19 in 2023. The mechanisms behind this extreme cold event remain unclear. This study uses the circulation projection method to detect and quantify the contributions of various factors to this extreme cold event. The findings indicate that large-scale atmospheric circulation anomalies are the predominant factors triggering this cold wave. The Polar-Eurasian (POL)-like teleconnection pattern is identified as a key driver for the cold anomalies, contributing approximately 85% of total cold anomalies in Northern East Asia in this event. Although the POL-like teleconnection is largely internally generated, the preceding low sea ice levels in the Barents and Kara Seas can strengthen and maintain POL teleconnection. Additionally, preceding November increased snow cover in Northern East Asia can further amplify this cold event by enhancing local surface albedo and reducing incoming solar shortwave radiation.
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页数：10
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