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标题

河套灌区近50年气候变化特征及趋势分析

作者

王丽萍 刘廷玺 丁艳宏 王国强 刘霞

机构

内蒙古农业大学水利与土木建筑工程学院; 北京师范大学水科学研究院

摘要

以河套灌区为研究区, 收集、整理和分析了河套灌区由西向东的磴口、杭后、临河、五原、前旗5个区域近50年的气候资料:包括降水量、气温、日照总时数、无霜期、平均风速、蒸发量等, 分别运用线性趋势法、Mann-Kendell法和小波分析等手段, 研究了该地区不同时段、不同区域的气象因子的趋势性、突变性和周期性. 结果显示:近50 年来灌区年平均气温呈逐年上升的趋势, 并且通过了M-K显著性检验.50 年间增温幅度约为2℃, 各月极端气温差约为41℃, 且各月气温呈明显的升高趋势, 突变点为1990年;灌区年降水量在波动中呈微弱增加的线性趋势, 增加总量不足10 mm ; 而灌区年蒸发量自2000 年以来呈现出明显的增加趋势, 增加的蒸发量体现在春季的2 、3 、4 月份; 灌区年平均风速有明显的降低趋势, 突变点为2000年; 年日照总时数有变短、年无霜期有增加趋势, 但二者变化趋势并不明显.

关键词

河套灌区;气候变化;特征;趋势

引用

王丽萍 刘廷玺 丁艳宏 王国强 刘霞.河套灌区近50年气候变化特征及趋势分析.[J]. 北京师范大学学报(自然科学版),2016,52(3)402.

基金

中国科学院“西部之光”人才培养计划资助项目, 国家自然科学基金资助项目(50969003)

分类号

S16 ; S27

DOI

10.16360/j.cnki.jbnuns.2016.03.024

Title

Characteristics and tendency of climate change in the Hetao Irrigation District in the past 50 years

Author

WANG Liping, LIU Tingxi, DING Yanhong, WANG Guoqiang, LIU Xia

Affiliations

College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University; College of Water Sciences ,Beijing Normal University

Abstract

To understand impact of climate change , more studies are focused to analyze characteristics and tendency of regional climate changes . Close to 50 years of data on precipitation , temperature , sunshine hours , frost-free period , average wind speed and evaporation from west to east in the Hetao Irrigation District are collected in this study . Li near trend method , Mann-Kendell method and Wavelet analysis were used to clarify trends , mutations and periodicities of meteorological factors at different times and in different areas of the district . It was found that annual mean temperature in the last 50 years increased by about 2 ℃ in this area . Extre memonthly temperature difference was about 41 ℃, monthly mean temperature showed a maked rising trend with main periodicity of 2 and 16 years and amutation in 1990 . Annual precipitation showed a weak upward trend during fluctuation . The increase was smaller than 10 mm , whereas the annual evaporation showed a clear increasing trend with total of over 300 mm mainly concentrated in spring including February , March and April . Average annual wind speed decreased significantly with main periodicity of 2 and 16 years and a mutation in 2000 . Total annual sunshine hour has become shorter , frost-free period longer but the trends were not marked .

Key words

Hetao Irrigation District ; climate change ; characteristic ; trend

cite

WANG Liping, LIU Tingxi, DING Yanhong, WANG Guoqiang, LIU Xia. Characteristics and tendency of climate change in the Hetao Irrigation District in the past 50 years [J]. Journal of Beijing Normal University (Natural Science), 2016,52(3):402.

DOI

10.16360/j.cnki.jbnuns.2016.03.024

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