The enhanced synoptic variation in sea ice over Pacific sector of Arctic Ocean during summer half year  

作　　者：LI Yijiao JIANG Zhina DAI Guokun DING Minghu 

机构地区：[1]State Key Laboratory of Severe Weather and Institute of Global Change and Polar Meteorology,Chinese Academy of Meteorological Sciences,Beijing 100081,China [2]Key Laboratory of Polar Atmosphere-ocean-ice System for Weather and Climate,Ministry of Education,Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences,Fudan University,Shanghai 200438,China

出　　处：《Advances in Polar Science》2024年第4期438-448,共11页极地科学进展（英文版）

基　　金：supported by S&T Development Fund of CAMS(Grant no.2023KJ018);Basic Research Fund of CAMS(Grant nos.2023Z015 and 2023Z025);Key Laboratory of Polar Atmosphere-ocean-ice System for Weather and Climate,Ministry of Education,China.

摘　　要：This study investigates the synoptic Arctic sea ice variation during the summer half year based on a regional daily sea ice concentration(SIC)tendency index during 1979-2021.Results indicate an enhancement in synoptic SIC variation over the Pacific sector of Arctic Ocean,with the maximum amplitude concentrating along the sea ice edge to covering a larger domain.Most synoptic severe sea ice variations occur for a single day or 2-3 d,typically starting after mid-June and ending in mid-November over Beaufort-Chukchi seas.However,there is a clear shift in ending time over the East Siberian-Laptev seas from early October to early November.Further analysis suggests that wind-driven sea ice drift may significantly contribute to the amplification of synoptic sea ice variation.This result contributes to our understanding of regional Arctic sea ice predictability,particularly in relation to the Arctic northeast shipping passage.

关 键 词：sea ice synoptic variability ARCTIC enhancement SUMMER 

分 类 号：P941.62[天文地球—自然地理学] P731.15P467