[1]甄英,何静.青藏高原东南缘阿坝州降水变化时空特征及突变性分析[J].水土保持研究,2018,25(04):195-199.
　ZHEN Ying,HE Jing.Spatial and Temporal Characteristics and Mutation Analysis of Precipitation Variation in Aba Prefecture on the Southeast Margin of Qinghai-Tibet Plateau[J].Research of Soil and Water Conservation,2018,25(04):195-199.
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青藏高原东南缘阿坝州降水变化时空特征及突变性分析

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 25 期数: 2018年04期 页码: 195-199 栏目: 出版日期: 2018-06-13
Title:
Spatial and Temporal Characteristics and Mutation Analysis of Precipitation Variation in Aba Prefecture on the Southeast Margin of Qinghai-Tibet Plateau
作者:
甄英1, 何静2
1. 内江师范学院 地理与资源科学学院, 四川 内江 641199;
2. 成都信息工程大学 大气科学学院, 成都 610225
Author(s):
ZHEN Ying1, HE Jing2
1. School of Geography & Resource Science, Neijiang Normal University, Neijiang, Sichuan 641199, China;
2. School of Atmospheric Sciences, Chengdu University of Information Technology, Chengdu 610225, China
关键词:
阿坝州; 降水; 集中度; 集中期
Keywords:
Aba Prefecture; precipitation; concentration; concentrated period
分类号:
P426.6;P461
摘要:
根据阿坝州6个气象站1961—2010年的降水资料，采用年内分配不均匀系数（Cut）、降水集中度（PCD）和集中期（PCP）、Mann-Kendall检验法等方法并结合GIS空间分析技术分析了其降水时空分布特征及突变性。结果表明：（1）趋势上，近50年来阿坝州降水整体呈上升趋势，倾向率为4.25 mm/10 a；降水年内分配不均匀系数Cut呈下降趋势，均值为0.92；PCD和PCP整体也呈下降趋势，PCD多年均值为0.57，PCP多年均值为13.43候，Mann-Kendall曲线分别表现为“升降交替和平稳”以及“降升降升”几个阶段。（2）空间上，年降水量表现为从中南部向东北部和南部减少的趋势，Cut从东部向西北递增，PCD从东向西递增，PCP出现“南早北晚”的差异。（3）合成分析，多水年的PCD比少水年的略大，并且南部地区大于北部地区；多水年的PCP比少水年偏晚，并且西北部的PCP比其他地方都偏晚。
Abstract:
According to the precipitation data of 6 meteorological stations in Aba Prefecture from 1961 to 2010, temporal and spatial distribution of precipitation and its mutation were analyzed by annual uneven distribution coefficient(Cut), precipitation concentration degree (PCD), precipitation concentration period (PCP), Mann-Kendall test method and other methods combining with GIS spatial analysis technology. The results showed that: (1) in the past 50 years, precipitation in Aba was increasing, and the inclination rate was 4.25 mm per decade; the distribution of non-uniformity coefficient in precipitation was decreasing, the mean was 0.92. PCD and PCP were also declining, and the mean value was 0.57; the average value of PCP was 13.43 years, and Mann-Kendall curves was expressed as ‘ascending and descending alternately and stable’ and ‘descending-ascending-descending-ascending’; (2) the annual precipitation was decreasing from south to northeast and south, and Cut increased from east to northwest; PCD increased from east to west, and PCP had the characteristics of ‘southern early, northern late’; (3) for the synthetic analysis, PCD in the year with larger precipitation was slightly larger than that of the year with less precipitation, and it was larger in the southern part than the northern region. PCP with larger precipitation was later than the year with less precipitation, and PCP was later in northwest than any other place.

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备注/Memo

收稿日期:2017-07-08;改回日期:2017-08-30。
基金项目:四川省教育厅项目“基于SLM模型的岷江流域气候水文响应特征研究”（16ZB0303）
作者简介:甄英(1983-),女,河北承德人,硕士研究生,讲师,主要从事资源脆弱区环境保护与利用研究。E-mail:zhen2153343@163.com

更新日期/Last Update: 1900-01-01