| 北半球夏季中低纬地区的平均垂直环流与大气中冷热源分布的关系 |
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| 引用本文： | 叶笃正,杨广基.北半球夏季中低纬地区的平均垂直环流与大气中冷热源分布的关系[J].气象学报,1981,39(1):28-35. |
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| 作者姓名： | 叶笃正 杨广基 |
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| 作者单位： | 中国科学院大气物理研究所
(叶笃正)，中国科学院大气物理研究所(杨广基) |
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| 摘 要： | 本文应用中央气象局出版的“北半球高空气候图集”中的风场资料,计算了45°N以南、北半球范围、7月份850 mb—100 mb各标准等压面层上的平均垂直运动。分析了不同区域经向和纬向垂直环流的特点,并将它与大气中冷热源进行对照。指出:夏季北半球低纬度平均是个Hadley环流,其北是个道环流。形成这种环流形势的主要贡献地区在两个大洋上,这主要与低纬度大气是个热源、共北是个冷源的分布有关。另外,由纬向环流看到,夏季北半球中低纬主要上升运动区和下沉运动区各有两个,这两对上升气流区和下沉气流区构成了夏季北半球中低纬地区垂直环流的大形势。此外,本文还指出夏季青藏高原上空的上升气流向四周流出后所影响的地理区域。
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| 收稿时间： | 1980/2/28 0:00:00 |
| 修稿时间： | 1980/5/13 0:00:00 |
THE AVERAGE SUMMER VERTICAL CIRCULATION TO THE SOUTH OF 45°N OF NORTHERN HEMISPHERE AND ITS ROLATION TO THE DISTRIBUTION OF HEAT SOURCES AND SINKS IN THE ATMOSPHERE |
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| Ye Du-zheng.THE AVERAGE SUMMER VERTICAL CIRCULATION TO THE SOUTH OF 45°N OF NORTHERN HEMISPHERE AND ITS ROLATION TO THE DISTRIBUTION OF HEAT SOURCES AND SINKS IN THE ATMOSPHERE[J].Acta Meteorologica Sinica,1981,39(1):28-35. |
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| Authors: | Ye Du-zheng |
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| Institution: | Institute of Atmospheric Physics, Academia Sinica;Institute of Atmospheric Physics, Academia Sinica |
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| Abstract: | By using the data of the wind field of the upper climatic maps of northern hemisphere published by Central Meteorological Bureau, the average summer vertical motion at the verious standard layers to the south of 45°N has been calculated. The characteristics of the mean meridional and zonal circulation in various regions were analyzed and compared with the distribution of heat sources and sinks in the atmosphere. It is shown that the main contributions to the formation of the mean Hadley and Ferrel circulation come from Pacific and Atlantic Oceans. This may be attributed to the fact that over the two oceans there are heat sources in low latitudes and sinks to its north. It is also shown that there are two main ascending regions and two main descending regions to the south of 30°N. From these, the general features of the zonal vertical circulation are described. Finaly, in this paper, the influnce of ascending currents over Tsinghai-Tibetan plateau on the remote regions to the east, west, south and north of plateau is also discussed. |
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