| 青藏高原东部牧区雪灾的环流型及水汽场分析 |
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| 引用本文： | 梁潇云,钱正安,李万元.青藏高原东部牧区雪灾的环流型及水汽场分析[J].高原气象,2002,21(4):359-367. |
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| 作者姓名： | 梁潇云 钱正安 李万元 |
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| 作者单位： | 中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000 |
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| 基金项目： | 国家自然科学基金项目 (4 9765 0 11、40 0 0 5 0 0 8)的资助 |
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| 摘 要： | 冬、春季雪灾是青藏高原东部牧区重要的灾害性天气。本文利用历史天气图和国家气象中心T106L19全球模式的分析值格点资料，分析了青藏高原东部牧区近20年来冬，冬季降雨的天气形势和水汽场。结果表明，北脊南槽型、乌山脊型、阶梯槽型和国境槽型是造成高原东部牧区降雪的四类主要环流型；在高原东部牧区强降雪天气过程时气柱可降水量有明显增加，记要降雪区与水汽通量辐合区吻合，主要水汽来自孟加拉湾地区。
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| 关 键 词： | 青藏高原 雪灾环流型 可降水量 水汽通量 牧区 |
| 文章编号： | 1000-0534(2002)04-0359-09 |
| 修稿时间： | 2001年3月16日 |
Analyses on Circulation Patterns and Water Vapor Fields of Snow DisasterWeather in Eastern Pasture Areas of Qinghai-Xizang Plateau |
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| LIANG Xiao yun,QIAN Zheng an,LI Wan yuan.Analyses on Circulation Patterns and Water Vapor Fields of Snow DisasterWeather in Eastern Pasture Areas of Qinghai-Xizang Plateau[J].Plateau Meteorology,2002,21(4):359-367. |
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| Authors: | LIANG Xiao yun QIAN Zheng an LI Wan yuan |
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| Abstract: | The snow disaster weather occurred in winter and spring, is one of crucial catastrophe weathers in eastern pasture area of Qinghai Xizang Plateau(QXP). In this paper, the circulation patterns of the winter and spring snow disaster weathers over the area and some of their water vapor fields have been analyzed utilizing the historic synoptic charts and the analyzed gridded data of global model T106L19 of National Meteorological Center of China. The main conclusions are as follows: (1) There are four main circulation patterns causing snow disaster weathers in 500 hPa over the area in winter and spring. They are the pattern with the ridge to the north and the trough to the south of QXP, the one with ridges in Ural Mountain, the one with step like troughs, and the one with the troughs in China Kazakstan boundary. (2) The significant increasing of air column precipitable water happens when the strong snowing weathers occur. The main snowy regions are in well agreement with the convergence regions of water vapor fluxes. (3) The water vapor comes mainly from the Bay of Bengal when snow disaster weather occurs. |
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| Keywords: | QXP Snow disaster circulation pattern Precipitable water Water vapor fluxes |
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