| 基于TRMM数据的秦巴山区降水特征分析 |
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| 引用本文： | 廖伟,程志刚,李跃清.基于TRMM数据的秦巴山区降水特征分析[J].高原山地气象研究,2020,40(1):11-17. |
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| 作者姓名： | 廖伟 程志刚 李跃清 |
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| 作者单位： | 成都信息工程大学大气科学学院,成都 610225;中国气象局成都高原气象研究所,成都 610072 |
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| 基金项目： | 中国科学院战略性先导科技专项(A类)(编号:XDA23090103)；四川省气象局与南京信息工程大学局校合作项目预研培育项目(编号:SCJXHZ03)；国家自然科学基金重大研究计划(批准号:91937301)；中铁二院科学技术研究计划项目“复杂山区铁路桥梁建设期大风预测预警关键技术研究” |
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| 摘 要： | 本文利用1998~2015年TRMM卫星3B42的日降水资料,对秦巴山区的年降水量、季降水量、各个等级降雨日数、整个区域降水量的年际变化和季节变化进行了统计,同时还对各个不同降水类型的倾向率进行了统计,再根据他们的时空分布进行分析。结果表明:1)1998~2015年秦巴山区年平均降水量从东南到西北呈现依次递减的变化特征且呈带状分布,山区南部的降水量明显高于北部,山区东西部降水差别不大;2)四个季节的平均降水均呈现"南高北低"的空间分布特征;3)无雨日数在整个山区呈增大的趋势,小雨日数在整个山区呈减少的趋势,中雨日数除山区东南外呈增大的趋势,大雨日数除重庆、河南、四川北部外基本呈增大的趋势,暴雨日数除山区东西部暴雨日数减少外其他地方都呈增加的趋势;4)整个山区年降水量随着时间的增长在缓慢的增多。
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| 关 键 词： | 秦巴山区 降水特征 趋势变化 |
| 收稿时间： | 2020-02-28 |
Analysis of Precipitation Characteristics in Qin-Ba Mountainous Area Based on TRMM Data |
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| LIAO Wei,CHENG Zhigang,LI Yueqing.Analysis of Precipitation Characteristics in Qin-Ba Mountainous Area Based on TRMM Data[J].Plateau and Mountain Meteorology Research,2020,40(1):11-17. |
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| Authors: | LIAO Wei CHENG Zhigang LI Yueqing |
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| Institution: | 1. Chengdu University of Information Technology, Chengdu 610025, China;2. Chengdu Institute of Plateau Meteorology, CMA, Chengdu 610072, China |
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| Abstract: | Based on the daily precipitation data of TRMM satellite from 1998 to 2015, the annual precipitation, seasonal precipitation, rainfall days of various grades, the interannual and seasonal changes of precipitation in the entire region, the propensity rates of different precipitation types are calculated, and then analyzed according to their temporal and spatial distribution. The results show that: 1) The average annual precipitation in Qin-Ba Mountainous Area from 1998 to 2015 shows a decreasing trend from southeast to northwest, and it shows a stripe distribution. The precipitation in the south of the mountainous area is significantly higher than that in the north, and there is no significant difference in precipitation between the east and west of the mountainous area; 2) The average precipitation in the four seasons shows the spatial distribution characteristics of “high in the south and low in the north”; 3) The number of rainless days increases in the whole mountainous area and the number of light rainy days decreases in the whole mountainous area. The number of moderate rain days increases except the southeast of the Qin-Ba Mountainous Area. The number of heavy rain days increases except for Chongqing, Henan, and northern Sichuan. The number of rainstorm days increases except the number of rainstorm days decreases in the east and west of the mountainous area. 4)The annual precipitation in the whole mountainous area increases slowly over time. |
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| Keywords: | Qin-Ba mountainous area precipitation characteristics trend change |
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