Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s
The 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. The Asian-Pacific Oscillation (APO) can modulate the EASM because it not only represents the upper-tropospheric zonal land-sea...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/6012301 |
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| author | Wei Hua Zouxin Lin Xin Wang Guangzhou Fan |
| author_facet | Wei Hua Zouxin Lin Xin Wang Guangzhou Fan |
| author_sort | Wei Hua |
| collection | DOAJ |
| description | The 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. The 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. This 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 1948–1990, which contributed to the shift of the Pacific Decadal Oscillation (PDO) from its cold to warm phase and led to a weakened EASM. The 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. |
| format | Article |
| id | doaj-art-6cfc9a367104486c93d594873a64ace2 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-6cfc9a367104486c93d594873a64ace22025-02-03T01:32:45ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/60123016012301Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990sWei Hua0Zouxin Lin1Xin Wang2Guangzhou Fan3Joint Laboratory of Climate and Environment Change, School of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, ChinaJoint Laboratory of Climate and Environment Change, School of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, ChinaJoint Laboratory of Climate and Environment Change, School of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, ChinaJoint Laboratory of Climate and Environment Change, School of Atmospheric Sciences, Plateau Atmosphere and Environment Key Laboratory of Sichuan Province, Chengdu University of Information Technology, Chengdu 610225, ChinaThe 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. The 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. This 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 1948–1990, which contributed to the shift of the Pacific Decadal Oscillation (PDO) from its cold to warm phase and led to a weakened EASM. The 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.http://dx.doi.org/10.1155/2019/6012301 |
| spellingShingle | Wei Hua Zouxin Lin Xin Wang Guangzhou Fan Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s Advances in Meteorology |
| title | Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s |
| title_full | Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s |
| title_fullStr | Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s |
| title_full_unstemmed | Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s |
| title_short | Weakening Relationship between East Asian Summer Monsoon and Asian-Pacific Oscillation after 1990s |
| title_sort | weakening relationship between east asian summer monsoon and asian pacific oscillation after 1990s |
| url | http://dx.doi.org/10.1155/2019/6012301 |
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