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Abstract:
Diagnostic studies have been done of the seasonal and interdecadal variations of the coupling patterns for the air-sea interactions in the northern Pacific region, by using 500-hPa geopotential height field of the Northern Hemisphere and monthly mean SST field of northern Pacific Ocean (1951 ~ 1995) and with the aid of the Singular Value Decomposition (SVD) technique. The results show that: (1) The distribution patterns of SVD, which link with the El Niño (or La Niña) events, are important in the interaction between the atmosphere and ocean while the atmosphere, coupling with it, varies like the PNA teleconnection does. The coupling of air-sea interactions is the highest in the winter (January), specifically linking the El Niño event with the PNA pattern in the geopotential height field. Of the four seasons, summer has the poorest coupling when the 500-hPa geopotential height field corresponding to the La Niña event displays patterns similar to the East Asian-Pacific one (PJ). The spring and autumn are both transitional and the coupling is less tight in the autumn than in the spring. (2) Significant changes have taken place around 1976 in the pattern of air-sea coupling, with the year’s winter having intensified PNA pattern of 500-hPa winter geopotential height field, deepened Aleutian low that moves southeast and the summer following it having outstanding PJ pattern of 500-hPa geopotential height field, which is not so before 1976.
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References
|
[1]
|
WALLACE J M, SMITH C, BRETHERTON C S. Singular value decomposition of wintertime sea surfacetemperature and 500 hPa anomalies [J]. Journal of Climate, 1992, 5: 561-576. |
|
[2]
|
LAU N C, NATH M J. A modeling study of the relative roles of the tropical and extra tropical SST anomaliesin the variability of the global atmosphere-ocean system [J]. Journal of Climate, 1994, 7: 1184-1207. |
|
[3]
|
HUANG Rong-hui, LI Wei-jing. Effect of heat source anomalies over tropical Pacific in summer on the subtropical high over East Asia and its physical mechanism [J]. Chinese Journal of Atmospheric Sciences(formerly Scientia Atmospherica Sinica), 1988 (Special issue), 107-116. |
|
[4]
|
NITTA T. Convective activities in the tropical Western Pacific and their impact on the Northern Hemispheresummer circulation [J]. Journal of Meteorological Society of Japan, 1987, 65: 373-390. |
|
[5]
|
TRENBERTH K E. Recent observal interdecadal climate change in the Northern Hemisphere[J]. Bulletin ofAtmospheric Society. 1990, 71: 988-993. |
|
[6]
|
ZHANG Qin. On the relationship between the anomalous development of ENSO in the 1990’s andinterdecadal climati change [D]. Beijing: Chinese Academy of Meteorological Sciences, 1999. |
|
[7]
|
NITTA T,YANMADA S. Recent warming of the tropical sea surface temperature and its relationship to theNorthern Hemisphere circulation [J]. Journal of Meteorological Society of Japan. 1989, 67: 375-383. |
|
[8]
|
DING Yu-guo, JIANG Zhi-hong. Generality of singular value decompositon in diagnostic analysis ofmeteorological field [J]. Acta Meteorologica Sinica, 1996, 54: 365-372. |
|
[9]
|
LAU K M, PENG L. Dynamics of atmospheric teleconnections during the nor-thern summer[J]. Journal ofClimate, 1992, 5: 142-158. |
|
[10]
|
FU Zong-bin, WANG Qiang. The definition and detection of the abrupt climatic change [J]. ChineseJournal of Atmospheric Sciences, 1992, 18: 482-493. |
|
[11]
|
GRAHAM N E. Decadal-scale climate variability in the tropical and North Pacific during the 1970s and1980s: observations and model results [J]. Climate Dynamics, 1994, 10: 135-162. |
|
[12]
|
MILLER A J. CAYAN D R, BARNETT T P, et al. Interdecadal variability of the Pacific Ocean: modelresponse to observed heat flux and wind stress anomalies [J]. Climate Dynamics, 1994, 10: 287-302. |
|
[13]
|
NITTA T, HU Zhen-zheng. Summer climate variability in China and its association with 500 hPa heightand tropical convection [J]. Journal of Meteorological Society of Japan, 1996, 74: 425-445. |
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