| 青藏高原大气热量源汇年际变化及其与大气环流的关系(英文) |
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| 引用本文： | 赵平,陈隆勋.青藏高原大气热量源汇年际变化及其与大气环流的关系(英文)[J].大气科学进展,2001(1). |
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| 作者姓名： | 赵平 陈隆勋 |
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| 作者单位： | Zhao Ping (Department of Geophysics，Peking University，Beijing 100871) Chen Longxun (Chinese Academy of Meteorological Sciences，Beijing 100081) |
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| 基金项目： | the auspices of the National!(G1998040800)，CAS's Key Project for Basic Research on the Tibetan Plateau! (KZ951-A1-204, KZ95T- |
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| 摘 要： | 本文使用１９６１～１９９５年逐月青藏高原地区大气机热量源汇＜Ｑ１＞资料、１９６１～１９９０年青藏高原地区积雪日数和积雪深度资料、美国ＮＣＥＰ／ ＮＣＡＲ的再分析资料以及１９７５～１９９４年全球ＯＬＲ资料，讨论了高原大气热状况年际变化及其与大气环流的关系，发现：高原地区大气热源年际变化明显，其中春季和秋季高原地区＜Ｑ１＞的变率最大，并且水平分布很不均匀；当冬季高原冷源弱（或强）时，东亚大槽位置偏东（或西），对应着东亚强（或弱）的冬季风；夏季高原热源强（或弱）的年份，在高原及其邻近地区的对流层中、低层为偏差气旋环流（或反气旋环流），在中国长江流域低层为异常的西南风（或东北风），对应着东亚强（或弱）的夏季风，夏季高原热源强度还与南亚高压的强度和位置有关；春季４月的积雪状况与夏季高原大气热源强度有明显关系；夏季高原热源与同期青藏高原东南部、孟加拉湾、中南半岛、东南亚、中国西南部、长江流域和从黄海到到日本海一带对流有明显正相关。
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| 关 键 词： | 青藏高原 视热量源汇 积雪 OLR |
Interannual Variability of Atmospheric Heat Source/ Sink over the Qinghai-Xizang (Tibetan) Plateau and its Relation to Circulation |
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| Zhao Ping.Interannual Variability of Atmospheric Heat Source/ Sink over the Qinghai-Xizang (Tibetan) Plateau and its Relation to Circulation[J].Advances in Atmospheric Sciences,2001(1). |
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| Authors: | Zhao Ping |
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| Abstract: | Based on the 1961 -1995 atmospheric apparent heat source / sink and the 1961-1990 snow-cover days and depth over the Qinghai-Xizang Plateau (QXP) and the 1961-1995 reanalysis data of NCEP / NCAR and the 1975-1994 OLR data, this paper discusses the interannual variability of the heat regime and its relation to atmospheric circulation. It is shown that the interannual variability is pronounced, with maximal variability in spring and autumn, and the variability is heterogeneous horizontally. In the years with the weak (or strong) winter cold source, the deep trough over East Asia is to the east (or west) of its normal, which corresponds to strong (or weak) winter monsoon in East Asia. In the years with the strong (or weak) summer heat source, there exists an anomalous cyclone (or anticyclone) in the middle and lower troposphere over the QXP and its neighborhood and anomalous southwest (or northeast) winds over the Yangtze River valley of China, corresponding to strong (or weak) summer monsoon in East Asia. The summer heat source of the QXP is related to the intensity and position of the South Asia high. The QXP snow cover condition of April has a close relation to the heating intensity of summer. There is a remarkable negative correlation between the summer heat source of the QXP and the convection over the southeastern QXP, the Bay of Bengal, the Indo-China Peninsula, the southeastern Asia, the southwest part of China and the lower reaches of the Yangtze River and in the area from the Yellow Sea of China to the Sea of Japan. |
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| Keywords: | Qinghai-Xizang Plateau Apparent heat source / sink Snow cover OL |
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