| 运城市降水集中度和集中期的时空特征分析 |
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| 引用本文： | 藏曦.运城市降水集中度和集中期的时空特征分析[J].新疆气象,2017,11(1):76-80. |
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| 作者姓名： | 藏曦 |
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| 作者单位： | 芮城县气象局 |
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| 基金项目： | 山西省气象局一般项目（SXKYBTQ201510079） |
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| 摘 要： | 利用运城市9个气象站1960—2014年逐候降水资料,运用线性趋势、MannKendall曲线、相关系数和合成分析等方法探讨了运城市近55 a来年降水量、降水集中度(PCD)和集中期(PCP)的时空特征。结果表明:时间上,年降水量呈减少趋势,变化倾向率为-7.94 mm/10 a;PCD年际变化显著,在0.30~0.72,多年平均为0.53;PCP多年平均41.63候,最早与最晚相差13候。空间上,年降水量区域差异明显,由东南向西北递减;PCD从西南向东北递增,有2个大值和2个小值中心,PCP呈现"南早北晚"形势。PCD、PCP与年降水量、汛期降水量、月最大降水量、候最大降水量和日最大降水量之间都存在正相关,表明汛期降水量、月最大降水量、候最大降水量和日最大降水量越大的年份,PCD值就越大,降水就越集中,出现洪涝灾害的可能性就越大;降水集中期出现的越晚。
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| 关 键 词： | 降水 降水集中度 降水集中期 |
| 收稿时间： | 2016/7/9 0:00:00 |
| 修稿时间： | 2016/10/8 0:00:00 |
Temporal and spatial characteristics of precipitation concentration(PCD)and concentration period(PCP) in Yuncheng |
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| zangxi.Temporal and spatial characteristics of precipitation concentration(PCD)and concentration period(PCP) in Yuncheng[J].Bimonthly of Xinjiang Meteorology,2017,11(1):76-80. |
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| Authors: | zangxi |
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| Institution: | Ruicheng County Meteorological Bureau |
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| Abstract: | Based on daily rainfall data of 9 stations in Yuncheng in 1960-2014,the space-time characteristics and change rules of annual precipitation, precipitation concentration degree(PCD) and precipitation concentration period(PCD) in recent 55 years in Yuncheng are studied by using linear- trend,M-K curve correlation and synthetic methods analysis. Conlusion:on time,annual precipitation showed a decreasing tendency, the tendency ratio was -7.94mm/10a;the inter-annual change of PCD is obvious,the variability is between 0.30 and 0.72,the average is 0.53;the average of PCP is 41.63 pentad,difference between the latest and the earliest is 13 pentad. On space, the regional difference of annual preprecipitation decreased significantly fron the Southeast to the Northerwest,the PCD has 2 large and 2 small centers,; increasing from the Southest to the Northeast;the PCP in south areas is earlier than that in northern areas.There is a good positive relationship between PCD,PCPand annual precipitation ,flood season precipitation,mothly precipitation,pentad maximum precipitation,daily maximum precipitation, the larger the flood precipitation, pentad maximum precipitation,daily maximum precipitation are,the larger PCD is ,it will lead to the floods possibility more likely;the more late the PCD is ,the more concentrated precipitation will occur. |
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