| 蒙古五十年来旱涝变化和降水趋势的研究 |
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| 引用本文： | 马晓波.蒙古五十年来旱涝变化和降水趋势的研究[J].高原气象,1993,12(4):450-457. |
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| 作者姓名： | 马晓波 |
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| 作者单位： | 中国科学院兰州高原大气物理研究所 甘肃省 |
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| 基金项目： | 中科院KY85-10项目资助 |
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| 摘 要： | 本文利用蒙古２５个台站的５２年逐月降水量资料，研究了蒙古旱变化和降水趋势。结果表明：蒙古平均年降水量为２１６．１ｍｍ，分布由南向北增加，东西部少，中部多，南部和西部为干旱区，中部和东部为半干旱区，与我国干旱半干旱区是一个整体，降水主要集中在夏季；年降水量变率为１５．６％－３８．０％。蒙古旱涝都很频繁，旱的频率高于涝的频率，而大涝的频率是大旱的两倍。年降水量服从正态分布，并有准３年和１１－１４年周期
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| 关 键 词： | 蒙古 降水量 旱涝 降水 |
STUDY OF DROUGHT, FLOOD AND PRECIPITA-TION TREND IN MONGOLIA FOR LAST 52 YEARS |
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| Ma Xiaobo.STUDY OF DROUGHT, FLOOD AND PRECIPITA-TION TREND IN MONGOLIA FOR LAST 52 YEARS[J].Plateau Meteorology,1993,12(4):450-457. |
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| Authors: | Ma Xiaobo |
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| Abstract: | In this paper, drought, flood and precipitation trend are studied by using month by month precipitation data for last 52 years(1940-1991 ) at 25 stations in Mongolia. The results show: mean annual precipitation is 216.1 mm, southern and western parts are arid zone, middle and eastern parts are semi-arid zone; annual precipitation variability is 15.6%-38.0%. It is shown that both drought and flood are very frequent in Mongolia. The frequency of drought is higher then the flood, the frequency of severe flood is the two times of the severe drought. Annual precipitation distribution is normal distribution, and it has the quasi-three years and 11-14 years periods. Annual precipitation increases about 0.34 mm / decade years. Annual precipitation increases in the rate of 5.13 mm/year in 1980's and it continue increases in 1990's. |
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| Keywords: | Mongolia Precipitation Drought and flood trend |
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