| 斜压模,正压模和异常海温时间变化的位相关系 |
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| 引用本文： | 管兆勇,周铁汉.斜压模,正压模和异常海温时间变化的位相关系[J].气象科学,2000,21(3):376-388. |
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| 作者姓名： | 管兆勇 周铁汉 |
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| 作者单位： | 南京气象学院,南京,210044 |
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| 基金项目： | “National Key Programme for Developing Basic Sciences,G19980 40 90 1- 3”资助，国家自然科学基金项目!(编号 :49775 2 6 5 ) |
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| 摘 要： | 利用１９５８－１９９７共４０年ＮＥＣＰ／ＮＣＡＲ再分析大气资料和ＧＩＳＳＴ海表温度资料集，研究了大气斜压模、正压模与海表温度变化这三者之间位相关系，并从大气动力学方程组解释了这些位相关系。指出：大气了斜压西风异常时间变化的位相落略微后于ＳＳＴＡ的变化位相，而正压西风异常的变化位相超前于ＳＳ－ＴＡ变化位相。斜压纬向风异常的变化又超前于正压异常纬向风的变化。斜压纬向风异常与海表温度异常之间存在正相关关
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| 关 键 词： | ENSO 正压模 斜压模 位相 海温 |
THE PHASE RELATIONSHIP AMONG THE TEMPORAL VARIATIONS OF BAROCLINIC AND BAROTROPIC MODES AND SSTA |
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| Guan Zhaoyong,Zhou Tiehan.THE PHASE RELATIONSHIP AMONG THE TEMPORAL VARIATIONS OF BAROCLINIC AND BAROTROPIC MODES AND SSTA[J].Scientia Meteorologica Sinica,2000,21(3):376-388. |
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| Authors: | Guan Zhaoyong Zhou Tiehan |
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| Abstract: | In the context of the 1958~1997 NCEP/NCAR reanalyses and GISST datasets,the phase relations among baroclinic/barotropic modes and SSTA have been studied,and explained by the governing equations of atmospheric dynamics.It is showed that the phase of the baroclinic anomalous westerly leads that of SSTA.In turn,the baroclinic Zonal wind anomaly changes ahead of the baroctropic zonal wind anomaly wind anomalies and SSTA.The genesis of the baroclinic mode is related to thermal heating,but that of the barotropic mode is attributed to non-linear interactions between baroclinic disturbances.These phase relations governed by the dynamic and thermal processes contain the possible mechanism of ENSO cycle. |
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| Keywords: | ENSO Barotropic mode Baroclinic mode Phase |
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