Decadal summer drought frequency in China: the increasing influence of the Atlantic Multi-decadal Oscillation

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 C...

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Bibliographic Details
Published in:Environmental Research Letters
Main Authors: Chengcheng Qian, Jin-Yi Yu, Ge Chen
Format: Article in Journal/Newspaper
Language:English
Published: IOP Publishing 2014
Subjects:
decacdal drought frequency in China
Atlantic Multi-decadal Oscillation
global warming
Pacific Decadal Oscillation
early-1990s climate shift
Eurasian wave train
Environmental technology. Sanitary engineering
TD1-1066
Environmental sciences
GE1-350
Science
Q
Physics
QC1-999
Pacific
North Atlantic
Online Access:https://doi.org/10.1088/1748-9326/9/12/124004
https://doaj.org/article/99836170ee6d43c899880f46d8211977
Description
Summary: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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