Two Types of Diurnal Variations in Heavy Rainfall during July over Korea

Park, Chang-Kyun; Chang, Minhee; Ho, Chang-Hoi; Ha, Kyung‐Ja; Kim, Jinwon; Sohn, Byung-Ju

doi:10.1007/s00376-021-1178-8

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…South Korea also experienced one of its most unusual East Asian Summer Monsoon seasons since 1973 due to the very active Changma front. Torrential rains wreaked havoc across the country causing landslides, flooding and taking lives (Park et al 2021 ). In July, ongoing heavy rains affected eastern and western areas of Japan in association with the stagnation of an active Baiu front over mainland Japan.…”

Section: Distinct Climatic Characteristics Of Monsoon 2020mentioning

confidence: 99%

Erratic Asian summer monsoon 2020: COVID-19 lockdown initiatives possible cause for these episodes?

Kripalani

et al. 2022

Clim Dyn

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The summer (June through September) monsoon 2020 has been very erratic with episodes of heavy and devastating rains, landslides and catastrophic winds over South Asia (India, Pakistan, Nepal, Bangladesh), East Asia (China, Korea, and Japan), and Southeast Asia (Singapore, Thailand, Vietnam, Laos, Cambodia, Philippines, Indonesia). The withdrawal of the summer monsoon over India was delayed by 2 weeks. The monsoon season over East Asia has been the longest. China recorded a Dam burst in the twentieth century. Furthermore, the Korean Peninsula has experienced back-to-back severe tropical cyclones. Could the lockdown activities initiate to control the COVID-19 spread a possible cause for these major episodes? The strict enforcement of the lockdown regulations has led to a considerable reduction of air pollutants—dust and aerosols throughout the world. A recent study based on satellites and merged products has documented a statistically significant mean reduction of about 20, 8, and 50% in nitrogen dioxide, Aerosol Optical Depth (AOD) and PM2.5 concentrations, respectively over the megacities across the globe. Our analysis reveals a considerable reduction of about 20% in AOD over South as well as over East Asia, more-over East Asia than over South Asia. The reduced aerosols have impacted the strength of the incoming solar radiation as evidenced by enhanced warming, more-over the land than the oceans. The differential warming over the land and the ocean has resulted in the amplification of the meridional ocean-land thermal contrast and strengthening of the monsoon flow. These intense features have supported the surplus transport of moisture from the oceans towards the main lands. Some similarity between the anomalous rainfall pattern and the anomalous AOD pattern is discernable. In particular, the enhancement of rainfall, the reduction in AOD and the surface temperature warming match very well over two regions one over West-Central India and the other over the Yangzte River Valley. Results further reveal that the heavy rains over the Yangzte River Valley could be associated with the preceding reduced aerosols, while the heavy rains over West-Central India could be associated with reduced aerosols and also due to the surface temperature warming.

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Section: Distinct Climatic Characteristics Of Monsoon 2020mentioning

confidence: 99%

Erratic Asian summer monsoon 2020: COVID-19 lockdown initiatives possible cause for these episodes?

Kripalani

et al. 2022

Clim Dyn

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“…Most of the total annual precipitation is distributed over the summer months via heavy rainfalls developed by various generating mechanisms of moisture transports from surrounding seas and remote oceans, including atmospheric rivers (e.g. Changma/Maiyu) and tropical cyclones (Ha et al 2012, Kim and Jin 2016, Park et al 2021. This rapid recovery of the meteorological droughts has been found in the eastern US region (Kam et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Sub-seasonal to seasonal outlook of the 2022–23 southwestern Korea meteorological drought

Park,

Lee,

Yoon

et al. 2023

Environ. Res. Lett.

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The southwestern (SW) Korean Peninsula has been experiencing persistent precipitation deficits since the early spring of 2022, causing a severe meteorological drought in March 2023. As a growing season is forthcoming, the sub-seasonal to seasonal outlook of this ongoing drought comes into question. This study aims to investigate a key driver of the ongoing drought and the required precipitation for its termination and examine sub-seasonal and seasonal outlooks of the ongoing drought via probabilistic and climate model forecasts. Results showed a comparable contribution of springtime and summertime precipitation deficits, indicating that six-month accumulated precipitation deficit was a key driver of the ongoing drought. We found that at least 80, 150, and 210 mm (170, 310, and 440 mm) of accumulated precipitation is required for the recovery (full recovery) in March, April, and May 2023, respectively. These required accumulated precipitation were found in 25% and 20% of empirical and dynamic precipitation forecasts, respectively. This study suggests the collaborative effort of national and local governments and local stakeholders to mitigate negative impacts of the ongoing drought on regional communities.

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Preface to the Special Issue on Summer 2020: Record Rainfall in Asia — Mechanisms, Predictability and Impacts

Clark

Dong

et al. 2021

Adv. Atmos. Sci.

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Two Types of Diurnal Variations in Heavy Rainfall during July over Korea

Cited by 6 publications

References 30 publications

Erratic Asian summer monsoon 2020: COVID-19 lockdown initiatives possible cause for these episodes?

Erratic Asian summer monsoon 2020: COVID-19 lockdown initiatives possible cause for these episodes?

Sub-seasonal to seasonal outlook of the 2022–23 southwestern Korea meteorological drought

Preface to the Special Issue on Summer 2020: Record Rainfall in Asia — Mechanisms, Predictability and Impacts

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