ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 35 Issue 12 > 2009,35(12):37-43. DOI:10.7519/j.issn.1000-0526.2009.12.005 Prev Next
Possible Reasons for Northward Shift of Meiyu Belt in YangtzeHuaihe River Region During 2000-2005
- Article
- Figures
- Metrics
- Preview PDF
- Reference
- Related
- Cited by
- Materials
Abstract:
Since 2000, the probability of deficit Meiyu year has increased and Meiyu rainfall has stepped into a period of decrease in the Yangtze River regio n. The rainfall observational data show that the axis of Meiyu belt has shifted 2 degrees in latitude northwards and the rainfall has increased by 20% in the Huaihe River region during 2000-2005 in comparison with that of 1971-1999. Therefore, a ccording to the NCEP/NCAR reanalysis data, the anomaly situation of general circulation has been analyzed from the aspects of 200hPa wind field, 500hPa potential height field, 850hPa relative vorticity field, vertical velocity, apparentpparent water vapor sink (Q2) for the recent 6 years. In the end, the research s hows that all of the northward movement of the ridge line location of the West Pacific subtropical high, the reinforcement of the East Asian summer monsoon circulation and the weakening of cold air from the north have contributed to the northward shift of Meiyu belt during 2000-2005 in the YangtzeHuaihe River region.
Keywords:
Project Supported:
Clc Number:
Mobile website
