Journal
ENVIRONMENTAL RESEARCH LETTERS
Volume 9, Issue 12, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1748-9326/9/12/124004
Keywords
decacdal drought frequency in China; Atlantic Multi-decadal Oscillation; global warming; Pacific Decadal Oscillation; early-1990s climate shift; Eurasian wave train
Funding
- US National Science Foundation [AGS-1233542]
- NOAA [NA11OAR4310102]
- Natural High Technology Program of China [2013AA09A505, SS2013AA12120303]
- Ocean University of China
- Directorate For Geosciences [1233542] Funding Source: National Science Foundation
- Div Atmospheric & Geospace Sciences [1233542] Funding Source: National Science Foundation
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Decadal variations in summer drought events during 1956-2005 are examined over Eastern China to identify their leading variability modes and their linkages to the Pacific Decadal Oscillation (PDO), Atlantic Multi-decadal Oscillation (AMO), and global warming. The PDO influence is found to dominate China drought frequency from the 1960s to early 1990s via modulating the Western Pacific Subtropical High and the Mongolian High. The four-pole drought pattern produced by the PDO diminished after the early 1990s, being replaced by a dipolar drought pattern that is produced by the AMO via a Eurasian wave train emanating from North Atlantic to China. The increasing influence of the AMO on China drought since the early 1990s is further shown to be a consequence of global warming. This study indicates that the early 1990s is a time when the Atlantic began to exert a stronger influence on climate over China and even larger part of Asia.
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