Differences and links between the East Asian and South Asian summer monsoon systems: Characteristics and Variability

Huang, Ronghui; Liu, Yong; Du, Zheng; Jilong, Chen; Huangfu, Jingliang

doi:10.1007/s00376-017-7008-3

Cited by 31 publications

(14 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various pathways transporting moisture from the South Asian region towards the East Asian region and vice-versa have been proposed (eg Zhang 2001;Huang et al 2017;Yong and Huang 2019) between the in-phase as well as out of phase relationships between these two monsoon subsystems. The vertically integrated (from surface to 300 hPa) moisture transport and convergence mean pattern (Fig.…”

Section: Moisture Flux Transport and Convergencementioning

confidence: 99%

Erratic Asian Summer Monsoon 2020: COVID-19 Lockdown Initiatives Possible Cause for These Episodes?

Kripalani

et al. 2021

Preprint

View full text Add to dashboard Cite

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 two weeks. The monsoon season over East Asia has been the longest. China recorded a Dam burst in the 20th 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

show abstract

Section: Moisture Flux Transport and Convergencementioning

confidence: 99%

Erratic Asian Summer Monsoon 2020: COVID-19 Lockdown Initiatives Possible Cause for These Episodes?

Kripalani

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Various pathways transporting moisture from the South Asian region towards the East Asian region and vice-versa have been proposed (e.g. Zhang 2001 ; Huang et al 2017 ; Yong and Huang 2019 ) between the in-phase as well as out of phase relationships between these two monsoon subsystems. The vertically integrated (from surface to 300 hPa) moisture transport and convergence mean pattern (Fig.…”

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

View full text Add to dashboard Cite

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.

show abstract

“…NE has a cool temperate East Asian monsoon climate. NC, CC, and SC are under the control of the subtropical East Asian monsoon, while SW is under the control of the South Asian monsoon with alternate wet and dry seasons (Huang et al, ). (Note that Tibet and northwest China in Figure are not controlled by monsoon climate and had minimal fire activity.…”

Section: Methodsmentioning

confidence: 99%

Atmospheric Circulation Patterns Associated With Wildfires in the Monsoon Regions of China

Zhao

Liu

2019

Geophysical Research Letters

View full text Add to dashboard Cite

Major atmospheric circulation patterns for wildfires have been identified in regions with boreal, Mediterranean, and semiarid climates. This study investigates such patterns in the monsoon regions of China, where the climate is controlled by multiple atmospheric systems and wildfires have large spatial variability. We identified three patterns. The first pattern was characterized by a high‐pressure ridge in northeast China and contributed to wildfires by creating warmer and drier conditions. The second, meridional pattern contributed to wildfires in north, central, and south China by increasing dry air transport. The third, zonal pattern had a weaker westerly ridge and trough and contributed to wildfires in southwest China by decreasing the transport from westerly systems. We showed that a circulation index defined as the pressure difference between the positive and negative centers of fire‐pressure correlations had higher monthly fire prediction skills for large fire occurrences than local weather.

show abstract

Differences and links between the East Asian and South Asian summer monsoon systems: Characteristics and Variability

Cited by 31 publications

References 34 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?

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

Atmospheric Circulation Patterns Associated With Wildfires in the Monsoon Regions of China

Contact Info

Product

Resources

About