Affiliation:
1. a National Climate Center, China Meteorological Administration, Beijing, China
Abstract
Abstract
Based on the standardized precipitation evapotranspiration index (SPEI), a significant increase after the mid-1990s is detected in the annual number of days with drought in the zonal belt from southern Xinjiang to southern Northeast China and North China. This change features the predominant mode of the annual number of days with drought in China. Meanwhile, two significant breakpoints in 1981 and 2001 indicate a continuous increase of days with drought in the meridional belt from eastern Northwest China to eastern Southwest China. The increase in days with drought is closely related to the significant warming in the zonal belt but is attributed to both the increase of temperature and the decrease of precipitation in the meridional belt. The typical circulation patterns responsible for the increase of days with drought comprise a wave train stretching from North Atlantic to East Asia, the generally anomalous high pressure over China, the northerly anomalies prevailing over northern and central China, and the suppressed convection in most of the zonal and meridional belt. Both the AMO and the PDO after the 1980s have a close relationship with the interdecadal variation of the number of days with drought. On one hand, either a positive AMO phase or negative PDO phase motivates the typical circulation patterns favorable for the occurrence of drought. On the other hand, both the AMO and PDO affect the warming in the zonal and meridional belt, and the PDO is also closely connected with the precipitation in the meridional belt.
Funder
the National Key Research and Development Program of China
Publisher
American Meteorological Society
Reference200 articles.
1. The influence of the interdecadal Pacific oscillation on temperature and precipitation over the globe;Dong;Climate Dyn.,2015
2. Observed spatiotemporal characteristics of drought on various time scales over the Czech Republic;Potop;Theor. Appl. Climatol.,2014
3. An approach toward a rational classification of climate;Thornthwaite;Geogr. Rev.,1948
4. Atmospheric water vapor transport associated with typical anomalous summer rainfall patterns in China;Zhou;J. Geophys. Res.,2005
5. The interdecadal variation of summer precipitation in China and the drought trend in North China (in Chinese);Huang;Plateau Meteor.,1999
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