ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Archive > Volume 42 Issue 5 > 2016,42(5):532-539. DOI:10.7519/j.issn.1000-0526.2016.05.002 Prev Next
Influences of the 2014-2016 Super El Ni〖AKn~D〗o Event on Climate
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Abstract:
A super El Ni〖AKn~D〗o event occurred over the equatorial centraleastern Pacific during 2014-2016. It peaked in November 2015 with its strength larger than two other super El Ni〖AKn~D〗o events (1982/1983 and 1997/1998 events), ranking as the strongest El Ni〖AKn~D〗o event since 1951. By April 2016, it has lasted for 20 months, thus becoming the longest El Ni〖AKn~D〗o event since 1951. During the developing process of this El Ni〖AKn~D〗o, the atmospheric circulation from the tropical Pacific to East Asia has shown significant responses. The convection over the equatorial centraleastern Pacific was more active than normal, and anomalously ascending motion. However, over the equatorial western Pacific, the convection was inhibited and anomalous subsidence prevailed. The anomalous lowlevel Philippine Sea anticyclone persistently controlled northwestern Pacific and became gradually stronger with the development of El Ni〖AKn~D〗o. As a result, the western Pacific subtropical high (WPSH) has become stronger than normal, and its west boundary extended more westward. The WPSH in winter 2015 has been the strongest since 1980. Meanwhile, precipitation was above normal in the southern part of 〖JP2〗the Yangtze River Valley in China during autumn and winter of 2015, with the mean precipitation over South China (Guangdong, Guangxi and Hainan) in winter 2015 ranking as the first since 1951. Recently, this super El Ni〖AKn~D〗o event has been decaying. However, its further influences on the climate anomaly in China may still persist during the following spring and summer of 2016.
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