| 冬、夏季青藏高原地面加热场激发的500hPa遥相关型 |
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| 引用本文： | 李超.冬、夏季青藏高原地面加热场激发的500hPa遥相关型[J].高原气象,1994,13(2):122-127. |
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| 作者姓名： | 李超 |
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| 作者单位： | 成都气象学院气象系 |
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| 基金项目： | 国家基础性重大关键项目“气候预测理论的研究”资助 |
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| 摘 要： | 本文用青藏高原地面加热场强度来表征高原的加热状况，并用统计的方法，分析了冬季（２月）和夏季（７月）青藏高原地面加热场强度与同期５００ｈＰａ位势高度的遥相关关系，得到如下结论：冬季高原地面加热场可激发北半球５００ｈＰａ产生遥相关型，这种遥相关型可看成是二维Ｒｏｓｓｂｙ波列由低纬向东北方向传播；夏季高原地面加热场可激发北半球５００ｈＰａ产生类似于ＥＵ型的遥相关，这种遥相关型可看成二维Ｒｏｓｓｂｙ波列由
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| 关 键 词： | 遥相关型 青藏高原 地面加热场 |
500 hPa TELECONNECTION PATTERN EXCITED BY THE SURFACE HEATING FIELD IN THE QINGHAI- XIZANG PLATEAU IN WINTER AND SUMMER |
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| Li Chao.500 hPa TELECONNECTION PATTERN EXCITED BY THE SURFACE HEATING FIELD IN THE QINGHAI- XIZANG PLATEAU IN WINTER AND SUMMER[J].Plateau Meteorology,1994,13(2):122-127. |
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| Authors: | Li Chao |
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| Abstract: | In this paper,The thermodynamic influence of the Qinghai-Xizang Plateau is discussed based on the intensity of surface heating field in the Qinghai-Xizang Plateau and the correlation field between the intensity of surface heating field in the Qinghai-Xizang Plateau and 500 hPa gepopotential height field in winter(Feb.) and summer(July). According to the foregoing statistical discussion,it may be noted,the surface heating field in the Qinghai-Xizang Plateau in winter can excite the 500 hPa teleconnection pattern in the northern hemispheric atmosphere.The teleconnection pattern can be regarded as two-dimensional Rossby wave train and can propagate northeastward direction from low latitude to high latitude in northeastern direction. The surface heating field in the Qinghai-Xizang Plateau in summer can excite the teleconnection pattern in the northern hemispheric atmosphere.The teleconnection pattern is similar to EU teleconnection pattern,it can be regarded as two-dimensional Rossby wave train and can propagate northwestward direction from low latitude to high latitude.The propagation direction of the teleconnection pattern is opposite in winter and summer.This may be relate to the intensity of westly airstream in winter and in summer. |
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| Keywords: | s:Teleconnection pattern The Qinghai-Xizang Plateau The intensity of the surface heating field Two-dimensional Rossby wave train |
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