Modulation of dominant thermodynamic processes and relay dynamic processes in Arctic sea ice rapid melting  

作　　者：DING Ruichang HUANG Fei SHI Jian ZHAO Chuanhu &XIE Ruihuang 

机构地区：[1]Physical Oceanography Laboratory/Frontier Science Center for Deep Ocean Multispheres and Earth System,Ocean University of China,Qingdao 266000,China [2]College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266000,China [3]Laboratory for Ocean Dynamics and Climate,Qingdao Marine Science and Technology Center,Qingdao 266000,China

出　　处：《Advances in Polar Science》2025年第1期41-50,共10页极地科学进展(英文版)

基　　金：supported by the National Key Research and Development Program of China(Grant no.2019YFA0607004);the National Natural Science Foundation of China(Grant nos.42430411,42075024,42205029 and 42230405)。

摘　　要：Thermodynamic and dynamic processes(TDP)significantly modulate the rapid variability of Arctic sea ice,with complex interactions between them.This study quantifies the Arctic sea ice budget of volume from 1989 to 2021 using data from NSIDC and PIOMAS.Results show that thermodynamic processes dominate seasonal Arctic sea ice budget variation,covering 40%of the sea ice zone,strongest at the margins and in the seasonal ice zone.Dynamic processes play a relay role,contributing less than half of that from thermodynamic processes.Their influence is strongest in winter and weakest in summer,closely linked to sea ice drift circulation.TDP exhibit opposite seasonal cycles,with thermodynamic processes inversely correlated with sea ice volume changes.Dynamic processes are most negatively correlated with thermodynamic processes when they precede by 21 d.After strong thermodynamic processes,dynamic processes become more pronounced,peaking 76 d later,indicating a seasonal coupled effect where dynamic processes sustain and amplify the sea ice changes initiated by thermodynamic processes.Significant long-term trends in TDP are identified.Thermodynamic processes have increased over the past three decades,particularly in June to July and October to November.Dynamic processes decreases from June to August but increases in September.This study enhances understanding of the complex interplay between TDP modulate Arctic sea ice changes and highlights potential decadal trends under climate change.

关 键 词：Arctic sea ice budget dynamic-thermodynamic coupling sea ice volume 

分 类 号：P73[天文地球—海洋科学]