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Position: Home > Articles > Spatial-temporal variations in extreme precipitation and their relationship with atmospheric circulation in the Guanzhong Plain Arid Zone Research 2022,39 (1) 104-112

关中平原极端降水时空变化及其与大气环流的关系

作  者：
丁莹莹;邱德勋;吴常雪;穆兴民;高鹏
单  位：
西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;中国科学院水利部水土保持研究所
关键词：
关中平原;极端降水;时空变化;大气环流
摘  要：
基于关中平原13个气象站1957—2019年逐日降水资料,运用一元线性回归、Pearson相关分析和小波相干分析等方法,计算各极端降水指数,分析其时空变化特征,探讨极端降水与大气环流的关系。结果表明:(1)在时间上,除极端降水强度以0.007 mm·d~(-1)·(10a)~(-1)速率的上升外,其他极端降水指数均呈下降趋势,其中年均极端降水总量(PRCPTOT)下降最快,下降速率为-5.528 mm·(10a)~(-1),并且各极端降水指数均无显著突变点。(2)在空间上,极端降水指数南高北低,空间差异显著。(3)反映大气环流的南方涛动指数(SOI)对极端降水影响最为显著。SOI越大,关中平原越易出现少雨现象。本研究可为关中平原洪水灾害防治提供科学理论依据。
译  名：
Spatial-temporal variations in extreme precipitation and their relationship with atmospheric circulation in the Guanzhong Plain
作  者：
DING Yingying;QIU Dexun;WU Changxue;MU Xingmin;GAO Peng;State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University;Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources;
关键词：
Guanzhong Plain;;extreme precipitation;;spatial-temporal variation;;atmospheric circulation
摘  要：
Based on daily precipitation data collected from 13 meteorological stations in the Guanzhong Plain in1957-2019, the extreme precipitation indices were calculated and their spatial-temporal variation characteristics were analyzed. Specifically, the correlation between extreme precipitation and atmospheric general circulation was explored using a unitary linear regression method, Pearson correlation analysis, and wavelet coherence analysis. The results showed the following.(1) Extreme precipitation intensity showed an increasing trend at a rate of 0.007 mm·d~(-1)·(10 a)~(-1), whereas other extreme precipitation indices showed a decreasing trend in which the annual total extreme precipitation showed the most pronounced decreased with a rate of-5.528 mm ·(10 a)~(-1).Additionally, none of the extreme precipitation indices had a significant mutation point.(2) The extreme precipitation indices were higher in the south and lower in the north, with a significant spatial difference detected.(3) Only the southern oscillation index(SOI) had a significant effect on extreme precipitation. The larger the SOI value, the more likely it was to rain less on the Guanzhong Plain. These results provide a theoretical basis for flood disaster prevention and control on the Guanzhong Plain.

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