Abstract

This study aims to examine the mechanisms that drive extreme heat events in Siberia during boreal spring. The results from this study suggest that the upper-level atmospheric waves across Eurasia induced by the warm sea surface temperature (SST) in the eastern North Atlantic and large snow melting in southern Siberia are responsible for a large temperature increase in Siberia. These suggested mechanisms are examined by both observed data analysis and ideal numerical model simulations, which reasonably explain the record-breaking extreme heat events in 1997 and 2020. Future climate change scenarios simulated by a global climate model with large ensembles project a much larger increase in surface air temperature in Siberia compared to the surrounding area. Under future climate conditions, with significantly warmer SSTs in the eastern Atlantic and increased snowmelt in southern Siberia, the risk of extreme heat events in Siberia is expected to rise considerably. This is due to the enhanced large-scale atmospheric teleconnections and intensified local atmosphere-land feedback that will result from these changes.

Details

Title
Siberian heat extremes caused by Eurasian atmospheric teleconnections and amplified by local land surface conditions
Author
Choi, Nakbin 1   VIAFID ORCID Logo  ; Lee, Myong-In 2   VIAFID ORCID Logo  ; Sunlae Tak 2 ; Dong-Hyun Cha 2   VIAFID ORCID Logo  ; Watanabe, Masahiro 3 

 Department of Civil, Urban, Earth, and Environmental Engineering, Ulsan National Institute of Science and Technology , Ulsan, Republic of Korea; Department of Atmospheric, Oceanic and Earth Sciences, George Mason University , VA, United States of America 
 Department of Civil, Urban, Earth, and Environmental Engineering, Ulsan National Institute of Science and Technology , Ulsan, Republic of Korea 
 Atmosphere and Ocean Research Institute (AORI), University of Tokyo , Tokyo, Japan 
First page
034029
Publication year
2025
Publication date
Mar 2025
Publisher
IOP Publishing
e-ISSN
17489326
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
3169504020
Copyright
© 2025 The Author(s). Published by IOP Publishing Ltd. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.