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投稿e-mail: jbnuns_sub@bnu.edu.cn

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标题

1951—2012年中国降水集中度和集中期的时空格局

作者

孔 锋 方佳毅 刘 凡 方 建 史培军

机构

北京师范大学 地表过程与资源生态国家重点实验室; 民政部-教育部 减灾与应急管理研究院; 环境演变与自然灾害教育部重点实验室

摘要

以1978年为分界点,对1978年前后的以周为单位的降水集中度和集中期的时空格局和变化趋势进行研究.结果表明:1)中国的降水集中度首先具有明显南北分异规律,其次在中国北部具有明显东西差异;最后,中国整体降水集中度波动呈现减小趋势,且1978年之前波动较大,1978年之后趋于平稳.2)中国的降水集中期主要集中在第26~30周左右,并在1978年前后有1~3周不同幅度的滞后和提前,且南方以推迟为主,北方以提前为主;中国整体降水集中期波动呈现微弱减少趋势,且1978年前显著减少,但1978年后显著增加.

关键词

降水集中度;降水集中期;中国;区域差异;时空格局

引用

孔锋,方佳毅,刘凡,方建,史培军. 1951—2012年中国降水集中度和集中期的时空格局[J]. 北京师范大学学报(自然科学版),2015,04:404-411.

基金

国家自然科学基金创新研究群体资助项目(413221001); 国家重大科学研究计划(973)资助项目(2012CB955404)

分类号

X43, P333.2

DOI

10.16360/j.cnki.jbnuns.2015.04.014

Title

Variations in the spatiotemporal patterns of precipitation concentration degree and precipitation concentration period from 1951 to 2012 in China

Author

KONG Feng, FANG Jiayi, LIU Fan, FANG Jian, SHI Peijun

Affiliations

State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University; Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs & Ministry of Education; Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China, Beijing Normal University

Abstract

The year of 1978 was taken as a dividing point in the study of variations in precipitation concentration degree (PCD) and precipitation concentration period (PCP). It was found that PCD had a significant north-south pattern, but PCD had a significant east-west pattern in Northern China. Fluctuations in PCD showed a decreasing trend, PCD fluctuations were larger pre-1978 and smaller post-1978. PCP mainly fell between 26 and 30 weeks, 1-3 weeks of advance or lag were noted. Southern-based PCP mainly postponed, Northern-based PCP advanced. PCP showed a weak decreasing trend, with significant reduction pre-1978 and significant increase post-1978.

Key words

Precipitation concentration degree (PCD); precipitation concentration period (PCP); China; regional differences; spatial and temporal pattern

cite

KONG Feng, FANG Jiayi, LIU Fan, FANG Jian, SHI Peijun. Variations in the spatiotemporal patterns of precipitation concentration degree and precipitation concentration period from 1951 to 2012 in China[J]. Journal of Beijing Normal University(Natural Science)),2015,04:404-411.

DOI

10.16360/j.cnki.jbnuns.2015.04.014

Copyright © 2014 Journal of Beijing Normal University (Natural Science)
Designed by Mr. Sun Chumin. Email: cmsun@mail.bnu.edu.cn