- 1State Key Laboratory of Climate System Prediction and Risk Management /Key of Meteorological Disaster of Ministry of Education/CIC-FEMD,Nanjing University of Information Science and Technology,China
- 2School of Atmospheric Sciences, Nanjing University of Information Science and Technology,China（ydu@nuist.edu.cn）
- 3Jiangsu Climate Center, China(xiezhiqing9896@163.com)
Analysis of ground-based and remotely retrieved precipitation data reveals that heavy Meiyu precipitation events (HMPEs) produce a relatively independent rain-belt over eastern China. A rotating calipers algorithm is applied to quantify the spatial scales of HMPEs. We find that HMPEs have regular spatial scales with an average length, width and extent of about 1400 km, 500 km and 40.00 × 104 km2, respectively, through a comprehensive assessment of different types of HMPE, illustrating that HMPEs have a size similar to that of the sub-synoptic-scale Meiyu front (1500–2000 km). Convective activities along the Meiyu front zone and the upper westerly jet stream strongly affect the position and orientation of rain-belts of HMPEs. The Meiyu front zone, strong vertical motions and large transport of warm moisture have a comparable spatial scale to the HMPE rain-belts over eastern China.
How to cite: Du, Y., Xie, Z., and Miao, Q.: Spatial Scales of Heavy Meiyu Precipitation Events in Eastern China and Associated Atmospheric Processes, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-13901, https://doi.org/10.5194/egusphere-egu25-13901, 2025.
