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Atmospheric science
George Mason University
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Upcoming Events

Apr30

Heal Together - Fairfax Campus

Apr 30, 2025, 10:00 AM - 4:00 PM

Apr30

Health Together - SciTech Campus

Apr 30, 2025, 10:00 AM - 4:00 PM

Apr30

30 Apr (CLIM) Hsu, Hydrology in a Warming Climate

Apr 30, 2025, 1:30 - 2:30 PM

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14 May (CLIM) Lee, East Asian Heatwave

May 14, 2025, 1:30 - 2:30 PM

Myong-In Lee, Ulsan Institute of Science and Technology 

Distinctive features of the Summer Arctic Oscillations and its implications for the East Asian Heatwave 

Wed, 14 May, 1:30pm 

Innovation 134 and via Zoom (email bklinger@gmu.edu for link) 

Host: Nakbin Choi 

 

The Summer Arctic Oscillation (SAO) has a potential influence on extreme heat events in East Asia, contributing an estimated 5.5 additional days to the severe 2018 South Korean heatwave. The seminar highlights an emerging upper-tropospheric teleconnection pattern associated with the SAO, which has intensified since the late-1990s. This pattern plays a dominant role in modulating anticyclonic circulation over East Asia, surpassing the influence of ENSO during boreal summer. SAO exhibits a distinct spatial structure, with its core variability centered poleward of near 75N, and may originate from wave forcing in the near-Arctic. Additionally, the summer Arctic cloud radiative effect—characterized by a positive shortwave response—points to the importance of moist processes and cloud response in maintaining SAO variability. The observed equatorward expansion of SAO-related influences further underscores the necessity of investigating wave-mean flow interactions specific to the summer season. 

 

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