“Once-in-a-century” late summer monsoon causes historical floods in China and India in July 2020; Climate change brings stronger late monsoon in Asia

Many parts of China and India with a hundred millions people in the summer 2020 hit historical late monsoon floods, which caused extensive damages and hundreds lost lives in region. Reports about damaging storms with severe floods was reported from Asia during June and in July 2020 situation has became even worse.

During the July, the worst floods has been slowly shifting from northern parts of China and central China above southern China, Nepal, Bangladesh and India, currently is situation the worst in Bangladesh, India, southern China and Myanmar.

Heavy floods are caused by climate change according to scientists – late summer monsoon has becoming stronger in parts of southern, southeastern and eastern Asia, with maximum increase in the Bengal Gulf, Eastern Himalayas and central China. On the other hand, Indonesia and parts of northern Australia are becoming drier.

According to Wang (2014), warm Northern Hemisphere-cool Southern Hemisphere pattern induced hemispheric SLP difference favors the Asian monsoon but reduces the Australian summer monsoon rainfall. Such as tropical air from deserts in African-European and North-American sector is shifting, humid monsoon climate is too expanding from south to the north, with precipitation increases +2/+10 mm/day/year above mentioned area and in southwestern India.

It is possible, that similar summer will be in the next years in Asia more often and China, India and Southeast Asian countries had to be prepared for more severe storms and flooding during next decades thanks to climate change.

Situation in China and India is critical, Asia faces to the worst floods for past 100 years
In the square is a change of precipitation in area Asian-Australian monsoon between simulated years 2071-2100 and historical years 1901-2005 /Wang et al., 2014
Wang et al. (2014) found, that in simulations for the period 2071-2100 were simulated precipitation +2/+10 mm higher than during historical observation period 1901-2005 /Wang et al., 2014

A videodocumentation from China and India from July 2020


Used study:

Wang, B., Yim, S., Lee, J. et al. Future change of Asian-Australian monsoon under RCP 4.5 anthropogenic warming scenario. Clim Dyn 42, 83–100 (2014). https://doi.org/10.1007/s00382-013-1769-x

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Author: marekkucera
Writer about weather since 2007. The goal of this project is to inform a wide audience about extremes of weather, atmospheric circulation, and climate change around the world. If you like our work, you can support us on Patreon or donate.