| 江西省降水集中程度的变化特征 |
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| 引用本文： | 杨爱萍,杜筱玲.江西省降水集中程度的变化特征[J].中国农业气象,2010,31(4):512-516. |
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| 作者姓名： | 杨爱萍 杜筱玲 |
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| 作者单位： | 江西省气象台,南昌330046 |
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| 基金项目： | 江西省科技攻关计划项目 |
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| 摘 要： | 根据《江西省双季稻气象灾害指标》中降水集中期的定义,从降水集中期、降水集中期内的站次和平均单站雨量三个角度,探讨江西省83个气象站1971-2008年历年4-9月降水集中程度的变化特征。结果表明:江西省降水集中期的时空分布比较集中,赣西北地区的降水集中期平均每年只有赣东北地区的50%,6月中旬-7月上旬是降水集中期的主要时段;出现降水集中期的站次和平均单站雨量随年份变化均呈增多趋势,年倾向率分别为8.2站/10a和3.7mm/10a;20世纪90年代的降水集中期站次和平均单站雨量多于其他年代,而每年出现在6月中旬-7月上旬的降水集中期站次和平均单站雨量均多于其余时段。
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| 关 键 词： | 降水集中期 降水集中期站次 降水集中期雨量 |
Characteristics of Concentrative Precipitation in Jiangxi Province |
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| YANG Ai-ping,DU Xiao-ling.Characteristics of Concentrative Precipitation in Jiangxi Province[J].Chinese Journal of Agrometeorology,2010,31(4):512-516. |
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| Authors: | YANG Ai-ping DU Xiao-ling |
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| Institution: | (Jiangxi Meteorological Observatory,Nanchang 330046,China) |
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| Abstract: | According to the definition of concentrative precipitation in meteorological disaster indexes of double cropping rice in Jiangxi province,the characteristics of concentrative precipitation during April to September in Jiangxi province from 1971 to 2008,including the variation of concentrated period of precipitation,occurrence times of concentrative precipitation and average rainfall per station,was analyzed,by using statistical and trend analysis method.The results showed that concentrative period of precipitation was mainly distributed in the northeastern of Jiangxi each year,which was twice in the southwest,and usually happened from mid-June to early-July.The occurrence times of concentrative precipitation increased at the rate of 8.2/10y,and the average rainfall per station in concentrative period of precipitation increased at the rate of 3.7mm/10y.Both the occurrence times and the average rainfall per station in concentrative period of precipitation were more in the 1990s.And they were more from mid-June to early-July every year. |
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| Keywords: | Concentrative period of precipitation Occurrence times Average rainfall per station |
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