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1960—2015年中国西北地区大气可降水量变化特征
黄小燕
(中国气象局兰州干旱气象研究所)
Variation Characteristics of Precipitable Water Vapor in Northwest China during 1960-2015
HUANG Xiaoyan
(Institute of Arid Meteorology Lanzhou CMA,Key Laboratory of Arid Climate Change and Reducing Disaster of Gansu Province,Key Open Laboratory of Arid Climate Change and Reducing Disaster of CMA)
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投稿时间:2017-07-13    修订日期:2018-02-27
中文摘要: 采用中国西北地区1960—2015年113个地面气象站及24个探空站逐日气象资料,利用建立的西北地区大气可降水量与地面水汽压的经验关系式,计算西北地区各气象站点的大气可降水量,结合反距离加权插值、Mann-Kendall检验、小波分析等方法,对西北地区近56 a大气可降水量的时空分布特征及其与气象因子的关系进行了分析。结果表明:近56 a中国西北地区大气可降水总体呈增加趋势,平均每10 a增加0.11 mm,大气可降水量的月变化呈明显的单峰型;空间分布上,大气可降水量的高值区主要分布在西北东部地区,低值区主要分布在西北中部地区;空间变化上,西北大部分地区大气可降水量呈增加趋势,以陕西南部、甘肃东南部、青海西北部、新疆等地增加趋势明显;西北地区年平均大气可降水量存在明显的突变特征和周期性变化特征,在1983年左右发生突变,主振荡周期为4 a左右;西北地区大气可降水量与平均气温、相对湿度、降水量呈正相关性,与平均风速和日照时数呈负相关性。
Abstract:Based on the daily data of 113 meteorological stations and 24 radiosonde stations in Northwest China from 1960 to 2015, relation formula was established between precipitable water vapor (PWV) and ground water vapor pressure, and the PWV in Northwest China was calculated. With the methods of Inverse Distance Weighted, Mann-Kendall, Morlet wavelets, etc, temporal and spatial distribution of PWV characteristics and the relationship with the climate factors change was analyzed. The results showed that PWV increased in last 56 years with an increasing rate of 0.11?(10 a)-1, and the monthly variations of PWV appears obviously unimodal types. The high value of PWV area in Northwest China mainly distributed in the east of Northwest China, the middle area of Northwest China was a minimum part. The PWV in most parts of Northwest China increased, which were obvious in south of Shaanxi, southeast of Gansu, northwest of Qinghai, and Xinjiang. The annual average PWV in Northwest China showed an obvious mutation characteristic and periodical change characteristic, the mutation occured in 1983, and the primary period was 4 a. PWV in Northwest China showed a positive correlation with mean temperature, relative humidity and precipitation, negative correlation with wind speed and sunshine duration.
文章编号:201707130337     中图分类号:    文献标志码:
基金项目:公益性行业(气象)科研专项(重大专项)(GYHY201506001-4)、国家自然基金(41175081,41201370,31300376)和甘肃省自然科学基金(1208RJYA025)共同资助
引用文本:
黄小燕,0.[en_title][J].Meteor Mon,():-.
HUANG Xiaoyan,0.Variation Characteristics of Precipitable Water Vapor in Northwest China during 1960-2015[J].Meteor Mon,():-.