| 摘要: |
| 使用NCEP 1°×1°周平均表层海温资料（1982－1994）对南海与其邻近西太平洋进行谐波分析，结果发现对于SST的年变化，南海与其邻近西太平洋海域位相连续；而对于准两年变化（QBO），南海与其邻近西太平洋海域位相不连续。并据E1 Nino年与La Nina年对此现象的成因做了进一步分析。 |
| 关键词: 南海 西太平洋 SST 位相不连续 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，49676276号;国家教委博士点基金资助项目，96062330号 |
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| PHASE DISCONTINUITY OF THE SST INTERANNUAL OSCILLATION BETWEEN THE SOUTH CHINA SEA AND ITS ADJOINING WEST PACIFIC REGION |
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ZHOU Fa-xiu1, WANG Jough-tai2
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1.Department of Marine Meteorology, Ocean University of Qingdao, Qingdao, 266003;2.Dapartment of Atmospheric Science, Contral University, Chung-Li, Taiwan, 32054
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| Abstract: |
| In this paper, the 1°×1° / longitude × latitude weekly mean SST data (1982–1994) of American national center of environment prediction (NCEP) have been analyzed using the harmonic analysis method. Two cross sections are chosen along latitude 14.5° N and 7.5° N from 100° E to 140° E for analyzing the spatial SST phase evolution in the spatial domain of the South China Sea (SCS) and its neighboring West Pacific. Moreover, two time domains 1982–1983 and 1988–1989 are selected for analyzing the typical events of E1 Nino and La Nina. The results are summarized as follows.
(1) The annual cycle of SST both in the SCS and its neighboring West Pacific are continuous in the phase domain.
(2) The interannual variation of SST in both the SCS and its neighboring West Pacific are discontinuous in the phase domain. SST anomaly SSTA was positive in 1982–1983 winter, while SSTA was negative in 1988–1989 winter. Reversibly, SSTA in the West Pacific is negative in 1982–1983 winter, but positive in 1988–1989 winter. The above result describes the SSTA features of E1 Nino and La Nina events. The reason is related to the spatial geographical distribution of the semi-closed SCS and the open West Pacific region.
(3) The phase difference of SST between the SCS and its neighboring West Pacific would cause the atmospheric waves in the tropical West Pacific because of the nonlinear air-sea interaction. |
| Key words: SCS, West pacific, SST, Phase discontinuity |
