INVESTIGATIONS ON MOISTURE TRANSPORTS, BUDGETS AND SOURCES RESPONSIBLE FOR THE DECADAL VARIABILITY OF PRECIPITATION IN SOUTHERN CHINA |
| |
Authors: | HU Ya-min SI Dong LIU Yan-ju ZHAO Liang |
| |
Affiliation: | Guangdong Climate Center, Guangdong Province, Guangzhou 510080 China |
| |
Abstract: | In the context of global warming, apparent decdal-interdecdal variabilities can be detected in summer precipitation in southern China. Especially around the 1990s, precipitation in South China experienced a phase transition from a deficiency regime to an abundance regime in the early 1990s, while the Yangtze River Valley witnessed a phase shift of summer precipitation from abundance to deficiency in the late 1990s. Pertinent analyses reveal a close relationship between such decadal precipitation shifts and moisture budgets, which is mainly modulated by the meridional component. This relationship can be attributed to large-scale moisture transport anomalies. Further, the HYSPLIT model is utilized to quantitatively evaluate relative moisture contributions from diverse sources during different regimes. It can be found that during the period with abundant precipitation in South China, the moisture contribution from the source of Indochina Peninsula-South China Sea increased significantly, while during the deficient precipitation regime in the Yangtze River Valley, moisture from local source, western Pacific and Indochina Peninsula-South China Sea contributed less to precipitation. It means some new features of relative moisture contributions from diverse sources to precipitation anomaly in southern China took shape after 1990s. |
| |
Keywords: | precipitation in southern China moisture transport moisture budget method tracing the air particle via Lagrange scheme |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《热带气象学报(英文版)》浏览原始摘要信息 |
|
点击此处可从《热带气象学报(英文版)》下载全文 |
|