Release time:2024-09-20  Hits:

• Journal:Geophysical Research Letters
• Key Words:Recent extremely heavy precipitation has led to more frequent floods, storm surges, and other natural hazards in the Lancang‐Mekong River Basin, resulting in substantial economic losses and affecting millions of residences. This study used annual maximum precipitation to represent the extreme precipitation and analyzed its spatial‐temporal characteristics and the moisture sources and pathways. Results show that the extreme precipitation of the upstream region mainly occurred in July, while that of the downstream region mainly occurred in August‐September. The moisture pathways of the historical extreme precipitation were identified using a physical‐based model, and are classified into three clusters using a machine‐learning model. West Pacific Ocean and East China, local evapotranspiration, and Indian Ocean and Bay of Bengal (IO/BOB) are the three moisture transport pathways with contributions of 68.3%, 20.4%, and 11.3% to the total pathways. The tropical cyclones bring large amounts of moisture and mainly affect R1Xs in the downstream eastern area. Tropical cyclones shifted northward under climate change impact, and more extreme precipitation occurred over the LMRB due to moisture coming from the West Pacific Ocean and East China, but those from the IO and BOB had decreased because of the slowdown of flows across the Equator.
• Indexed by:SCI一区TOP
• Document Type:Journal
• Volume:51
• Issue:6
• Translation or Not:no
• Date of Publication:2024-02-20
• Included Journals:SCI