Role of Land–Atmosphere Interaction in the 2016 Northeast Asia Heat Wave: Impact of Soil Moisture Initialization

Yoon, Donghyuck; Kang, TaeHun; Cha, Dong‐Hyun; Song, Chang‐Keun; Lee, Myong‐In; Min, Ki‐Hong; Kim, Joowan; Chun, Jong Ahn; Seo, Eunkyo

doi:10.1029/2022jd037718

Cited by 6 publications

(2 citation statements)

References 82 publications

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“…This indicates that the horizontal moisture flux is essential to forming rainbands in August. Furthermore, dry soil moisture conditions in Mongolia were identified as one of the significant drivers of heatwaves in 2016 (Seo et al, 2020; Yeh et al, 2018; Yoon et al, 2022); however, there are no significant anomalies in soil moisture in 2022 (not shown), indicating that horizontal moisture flux seems to be the dominant driver of opposite behaviour in 2016 and 2022.…”

Section: Resultsmentioning

confidence: 99%

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Comparison of the opposite behaviours of Korean heatwaves with extreme hot sea surface temperatures in August 2016 and 2022

Choi,

Lee

2023

Intl Journal of Climatology

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In South Korea, an unprecedented heatwave occurred in August 2016. That year, sea surface temperature (SST) in the Korean marginal seas (KMS) was remarkably higher than that in climatology, and upper‐level anticyclonic circulations favoured this heatwave. More recently, similar conditions that can expect the frequent occurrence of heatwaves prevailed in August 2022. However, the opposite extreme phenomenon, heatwave days below climatology, occurred with the emergence of a stationary rainband in South Korea. This study aims to understand the two different behaviours of heatwaves in Korea under the same hot SST conditions in the KMS. The most pronounced difference between these two extreme cases is the existence of moisture flux related to the western North Pacific summer monsoon (WNPSM). Although the WNPSM is not generally highly correlated with temperature and precipitation in Korea, their relationship is particularly strong when hot SST conditions develop in the KMS. This SST condition, combined with the WNPSM, plays a role in determining this anomalous moisture flux in Korea. Enough tropical moisture flux occurred to build a stationary front with declining heatwave days during August 2022. In contrast, extremely dry and hot weather was more likely in 2016 due to inactive moisture fluxes from the western North Pacific.

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Section: Resultsmentioning

confidence: 99%

“…High WNPSM years (6) 1990, 2001, 2004, 2006Low WNPSM years (4) 1998, 2022 Korea is marginal and statistically insignificant (Figure 9b and Table 1). However, with the background condition of hot KMS SST, moisture flux modulated by the WNPSM is important to precipitation responses in Korea.…”

Section: Classified Yearsmentioning

confidence: 95%

Comparison of the opposite behaviours of Korean heatwaves with extreme hot sea surface temperatures in August 2016 and 2022

Choi,

Lee

2023

Intl Journal of Climatology

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Analysis and Forecasting of High-Impact Weather Systems in East Asia Using Numerical Models

Cha,

Yoon

2023

Springer Atmospheric Sciences

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Effects of Initial and Boundary Conditions on Heavy Rainfall Simulation over the Yellow Sea and the Korean Peninsula: Comparison of ECMWF and NCEP Analysis Data Effects and Verification with Dropsonde Observation

Hwang,

Cha,

Yoon

et al. 2024

Adv. Atmos. Sci.

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Role of Land–Atmosphere Interaction in the 2016 Northeast Asia Heat Wave: Impact of Soil Moisture Initialization

Abstract: The recent increase in severe heat waves is a crucial indicator of global warming and has caused considerable socioeconomic damage (

Cited by 6 publications

References 82 publications

Comparison of the opposite behaviours of Korean heatwaves with extreme hot sea surface temperatures in August 2016 and 2022

Comparison of the opposite behaviours of Korean heatwaves with extreme hot sea surface temperatures in August 2016 and 2022

Analysis and Forecasting of High-Impact Weather Systems in East Asia Using Numerical Models

Effects of Initial and Boundary Conditions on Heavy Rainfall Simulation over the Yellow Sea and the Korean Peninsula: Comparison of ECMWF and NCEP Analysis Data Effects and Verification with Dropsonde Observation

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