Enhanced Asian warming increases Arctic amplification

The Arctic has been experiencing prominent warming amplification. However, despite anthropogenic emissions and oceanic variability, whether Arctic amplification has a connection with land in the lower latitudes remains unknown. Here, we newly identify enhanced Asian warming as a factor underlying Ar...

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Bibliographic Details
Published in:Environmental Research Letters
Main Authors: Yongkun Xie, Jianping Huang, Guoxiong Wu, Nan Lei, Yimin Liu
Format: Article in Journal/Newspaper
Language:English
Published: IOP Publishing 2023
Subjects:
Asian warming
Arctic amplification
Tibetan Plateau
dryland
Barents–Kara Seas
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
Science
Q
Physics
QC1-999
Arctic
Arctic Ocean
albedo
Climate change
Sea ice
Online Access:https://doi.org/10.1088/1748-9326/acbdb1
https://doaj.org/article/d39d7d9424d1470798c9eec694be1c3f
Description
Summary:The Arctic has been experiencing prominent warming amplification. However, despite anthropogenic emissions and oceanic variability, whether Arctic amplification has a connection with land in the lower latitudes remains unknown. Here, we newly identify enhanced Asian warming as a factor underlying Arctic amplification. The simulations demonstrate that enhanced Asian warming contributes 22% of the wintertime amplified warming over the Barents–Kara Seas (BKS). We demonstrate that Asian warming remotely affects the Arctic by affecting poleward atmospheric heat and moisture transport. The external anomalous heat and moisture further trigger local feedbacks concerning sea ice-albedo feedback and changes in longwave radiation and evaporation, thus facilitating BKS warming amplification. The capacitor effect of the Arctic Ocean further modulates the seasonality of BKS warming via turbulent heat flux exchange between the atmosphere and ocean. Moreover, anomalous Rossby wave trains are responsible for the anomalous atmospheric circulations favoring the atmospheric heat and moisture transport into BKS. Our findings illuminate a new factor from remote lower latitudes affecting Arctic climate change.

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