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How do intermittency and simultaneous processes obfuscate the Arctic influence on midlatitude winter extreme weather events?

Cited 19 time in wos
Cited 20 time in scopus
Title
How do intermittency and simultaneous processes obfuscate the Arctic influence on midlatitude winter extreme weather events?
Other Titles
순간순간 변하는 대기상태가 어떻게 북극의 중위도에 미치는 극한기상의 영향을 모호하게 만드는가?
Authors
Overland, J. E.
Ballinger, T. J.
Cohen, J.
Francis, J. A.
Hanna, E.
Jaiser, R.
Kim, B. -M
Kim, Seong-Joong
Ukita, J.
Vihma, T.
Wang, M.
Zhang, X.
Subject
Environmental Sciences & EcologyMeteorology & Atmospheric Sciences
Keywords
Arcticpolar vortexclimate changeextreme weathersea iceArctic amplification
Issue Date
2021-03-18
Citation
Overland, J. E., et al. 2021. "How do intermittency and simultaneous processes obfuscate the Arctic influence on midlatitude winter extreme weather events?". ENVIRONMENTAL RESEARCH LETTERS, 16(4): 1-21.
Abstract
Pronounced changes in the Arctic environment add a new potential driver of anomalous weather patterns in midlatitudes that affect billions of people. Recent studies of these Arctic/midlatitude weather linkages, however, state inconsistent conclusions. A source of uncertainty arises from the chaotic nature of the atmosphere. Thermodynamic forcing by a rapidly warming Arctic contributes to weather events through changing surface heat fluxes and large-scale temperature and pressure gradients. But internal shifts in atmospheric dynamics ― the variability of the location, strength, and character of the jet stream, blocking, and stratospheric polar vortex (SPV) ― obscure the direct causes and effects. It is important to understand these associated processes to differentiate Arctic-forced variability from natural variability. For example in early winter, reduced Barents/Kara Seas sea-ice coverage may reinforce existing atmospheric teleconnections between the North Atlantic/Arctic and central Asia, and affect downstream weather in East Asia. Reduced sea ice in the Chukchi Sea can amplify atmospheric ridging of high pressure near Alaska, influencing downstream weather across North America. In late winter southward displacement of the SPV, coupled to the troposphere, leads to weather extremes in Eurasia and North America. Combined tropical and sea ice conditions can modulate the variability of the SPV. Observational evidence for Arctic/midlatitude weather linkages continues to accumulate, along with understanding of connections with pre-existing climate states. Relative to natural atmospheric variability, sea-ice loss alone has played a secondary role in Arctic/midlatitude weather linkages; the full influence of Arctic amplification remains uncertain.
URI
https://repository.kopri.re.kr/handle/201206/12961
DOI
http://dx.doi.org/10.1088/1748-9326/abdb5d
Type
Article
Station
해당사항없음
Indexed
SCIE
Appears in Collections  
2021-2021, Earth System Model-based Korea Polar Prediction System (KPOPS-Earth) Development and Its Application to the High-impact Weather Events originated from the Changing Arctic Ocean and Sea Ice (21-21) / Kim, Joo-Hong (PE21010)
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