EGU24-2976, updated on 08 Mar 2024
https://doi.org/10.5194/egusphere-egu24-2976
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Intensification of mesoscale convective systems in the East Asian rainband over the past two decades

Puxi Li1, Fengfei Song2, Haoming Chen1, Jian Li1, Andreas Prein3, and Wenxia Zhang4
Puxi Li et al.
  • 1Chinese Academy of Meteorological Sciences, State Key Laboratory of Severe Weather, Beijing, China (lipx@cma.gov.cn)
  • 2Frontier Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory, Ocean University of China, Qingdao, China
  • 3National Center for Atmospheric Research, 3090 Center Green Drive, Boulder, CO 80301, USA
  • 4LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

 As one of the major producers of extreme precipitation, mesoscale convective systems (MCSs) have received much attention. Recently, MCSs over several hotpots, including the Sahel and US Great Plains, have been found to intensify under global warming. However, relevant studies on the East Asian rainband, another MCS hotpot, are scarce. Here, by using a novel rain-cell tracking algorithm on a high spatiotemporal resolution satellite precipitation product, we show that both the frequency and intensity of MCSs over the East Asian rainband have increased by 21.8% and 9.8% respectively over the past two decades (2000-2021). The more frequent and intense MCSs contribute nearly three quarters to the total precipitation increase. The changes in MCSs are caused by more frequent favorable large-scale water vapor-rich environments that are likely to increase under global warming. The increased frequency and intensity of MCSs have profound impacts on the hydroclimate of East Asia, including producing extreme events such as severe flooding. 

How to cite: Li, P., Song, F., Chen, H., Li, J., Prein, A., and Zhang, W.: Intensification of mesoscale convective systems in the East Asian rainband over the past two decades, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-2976, https://doi.org/10.5194/egusphere-egu24-2976, 2024.

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