Accelerated Increase in the Arctic Tropospheric Warming Events Surpassing Stratospheric Warming Events During Winter

TitleAccelerated Increase in the Arctic Tropospheric Warming Events Surpassing Stratospheric Warming Events During Winter
Publication TypeJournal Article
Year of Publication2017
AuthorsLin, Yen-Heng, Wang S.-Y. Simon, Lee Ming-Ying, Yoon Jin-Ho, Meyer Jonathan D. D., and Rasch Philip J.
JournalGeophysical Research Letters
Volume44
Number8
Pages3806-3815
Date Published08/2017
Abstract / Summary

In January 2016, a robust reversal of the Arctic Oscillation took place associated with a rapid tropospheric warming in the Arctic region; this was followed by the occurrence of a classic sudden stratospheric warming in March. The succession of these two distinct Arctic warming events provides a stimulating opportunity to examine their characteristics in terms of similarities and differences. Historical cases of these two types of Arctic warming were identified and validated based upon tropical linkages with the Madden-Julian Oscillation and El Niño as documented in previous studies. The analysis indicates a recent and seemingly accelerated increase in the tropospheric warming type versus a flat trend in stratospheric warming type. The shorter duration and more rapid transition of tropospheric warming events may connect to the documented increase in midlatitude weather extremes, more so than the route of stratospheric warming type. Forced simulations with an atmospheric general circulation model suggest that the reduced Arctic sea ice contributes to the observed increase in the tropospheric warming events and associated remarkable strengthening of the cold Siberian high manifest in 2016.

URLhttp://doi.org/10.1002/2017gl073012
DOI10.1002/2017gl073012
Journal: Geophysical Research Letters
Year of Publication: 2017
Volume: 44
Number: 8
Pages: 3806-3815
Date Published: 08/2017

In January 2016, a robust reversal of the Arctic Oscillation took place associated with a rapid tropospheric warming in the Arctic region; this was followed by the occurrence of a classic sudden stratospheric warming in March. The succession of these two distinct Arctic warming events provides a stimulating opportunity to examine their characteristics in terms of similarities and differences. Historical cases of these two types of Arctic warming were identified and validated based upon tropical linkages with the Madden-Julian Oscillation and El Niño as documented in previous studies. The analysis indicates a recent and seemingly accelerated increase in the tropospheric warming type versus a flat trend in stratospheric warming type. The shorter duration and more rapid transition of tropospheric warming events may connect to the documented increase in midlatitude weather extremes, more so than the route of stratospheric warming type. Forced simulations with an atmospheric general circulation model suggest that the reduced Arctic sea ice contributes to the observed increase in the tropospheric warming events and associated remarkable strengthening of the cold Siberian high manifest in 2016.

DOI: 10.1002/2017gl073012
Citation:
Lin, Y, SS Wang, M Lee, J Yoon, JD Meyer, and PJ Rasch.  2017.  "Accelerated Increase in the Arctic Tropospheric Warming Events Surpassing Stratospheric Warming Events During Winter."  Geophysical Research Letters 44(8): 3806-3815.  https://doi.org/10.1002/2017gl073012.