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Unstable relationship between spring Arctic Oscillation and East Asian summer monsoon

Cited 21 time in wos
Cited 22 time in scopus
Unstable relationship between spring Arctic Oscillation and East Asian summer monsoon
Other Titles
봄철 북극진동과 동아시아 여름몬순의 불안정한 관계에대한 연구
Miao-Ni Gao
Kim, Seong-Joong
Dao-Yi Gong
Yang Jing
Meteorology & Atmospheric Sciences
Climate ChangeEast Asian MonsoonSpring Arctic Oscillation
Issue Date
Miao-Ni Gao, et al. 2014. "Unstable relationship between spring Arctic Oscillation and East Asian summer monsoon". INTERNATIONAL JOURNAL OF CLIMATOLOGY, 34: 2522-2528.
The relationship between spring (March to May) Arctic Oscillation (AO) and East Asian summer monsoon (EASM, May to July) on interannual timescale has a remarkable decadal variation in late 1990s, and their correlation coefficient abruptly turns from +0.77 during 1979?1997 to ?0.62 during 1998?2007. In the following summer after a spring positive AO phase, the lower-troposphere over East Asia (EA) features a cyclonic anomaly before 1997 but an anticyclonic anomaly after 1997, which results from different simultaneous air?sea features imposed by spring AO and distinctive evolution from spring to summer. In pre-1997, the spring AO-associated signal is mainly memorized and persists over Pacific, because the spring AO-associated wave activity prefers the high-latitude propagation from North Atlantic to Pacific. In contrast, a subtropical wave train from North Atlantic Ocean to Indian Ocean (IO) is evidently enhanced in post-1997 epoch, and accordingly the IO plays a dominant role in memorizing and extending the influence of spring AO on EASM. This subtropical route of spring AO-EASM teleconnection is a new finding. The strengthening of the subtropical wave train in post-1997 epoch could be partly attributed to the strengthening signals of spring AO over North Atlantic Ocean.
Appears in Collections  
2012-2013, Reconstruction and Observation of Components for the Southern and Northern Annular Mode to Investigate the Cause of Polar Climate Change (12-13) / Kim, Seong-Joong (PE12010; PE13010)
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