亚洲-太平洋涛动变化与北太平洋海温异常的联系

e East Asian summer monsoon (EASM), which is an important influencing summer climate of East Asia, is associated with large-scale change of the land-sea thermal contrast. e Asian-Pacific Oscillation (APO) can modulate the EASM because it not only represents the upper-tropospheric zonal land-sea thermal contrast over Asia and the Pacific region, but it also affects the sea surface temperature (SST) over the North Pacific, which can tune the land-sea thermal contrast for the EASM. is study revealed weakening of the APO-EASM relationship since the 1990s. It was found that the relationship between the APO and the EASM during 1948-1990 (1991-2016) was statistically significant (insignificant). Further study indicated that the APO was concurrent with significant positive SST in the central North Pacific and subtropical central-western Pacific during , which contributed to the shift of the Pacific Decadal Oscillation (PDO) from its cold to warm phase and led to a weakened EASM. e APO-related SST and atmospheric circulation anomalies were found statistically to be insignificant during 1991-2016, which indicates a weakening of influence of the APO on shift of the PDO, and even a weaker link to the EASM.

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Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s

Hua

Lin

Wang

et al. 2019

Advances in Meteorology

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亚洲-太平洋涛动变化与北太平洋海温异常的联系

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Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s

Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s

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