Cloud Radiative Effects Slow Sea Ice Changes During Summer Arctic Dipole Anomaly

Abstract Over the past 30 years, the Arctic Dipole Anomaly (DA) has repeatedly led to record lows in summer sea ice extent, with cloud radiative effects (CRE) playing a crucial regulatory role. Here, we reveal the CRE variations between positive and negative DA events and elucidate the slowing impac...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Haotian Zhang, Chuanfeng Zhao, Yan Xia, Annan Chen, Yikun Yang, Jie Yang, Xin Zhao, Yulei Chi, Hongtao Xu, Shouyi Zhong
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 2024
Subjects:
Arctic dipole anomaly
sea ice thickness
cloud radiative effect
cloud variation
Geophysics. Cosmic physics
QC801-809
Beaufort Sea
Chukchi
Chukchi Sea
East Siberian Sea
Greenland
Greenland Sea
Sea ice
Online Access:https://doi.org/10.1029/2024GL111205
https://doaj.org/article/c498c08a439f47359b6d35a358c10870
Description
Summary:Abstract Over the past 30 years, the Arctic Dipole Anomaly (DA) has repeatedly led to record lows in summer sea ice extent, with cloud radiative effects (CRE) playing a crucial regulatory role. Here, we reveal the CRE variations between positive and negative DA events and elucidate the slowing impacts of CRE on sea ice thickness (SIT) changes. The DA triggers robust meridional winds and transpolar drift, markedly reducing SIT in the Beaufort Sea (BeS), Chukchi Sea (CS), and East Siberian Sea (ESS), while increasing it in the Greenland Sea (GS). CRE significantly slow SIT changes, contributing +14.4, +4.4, +16.4, and −26.7 cm to changes from June to August, against total changes of −55.9, −29.4, −39.8, and +42.8 cm in September over BeS, CS, ESS, and GS, respectively. This study underscores the key impacts of CRE on sea ice variation, emphasizing their significance in the polar climate system.

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