文献类型：期刊文献

中文题名：柴达木盆地极端气候时空趋势及周期特征

英文题名：Spatiotemporal trends and periodic features of climate extremes over the Qaidam Basin,China,during 1960-2014

作者：葛根巴图[1,2] 魏巍[3] 张晓[1] 杨晓晖[1] 时忠杰[1]

第一作者：葛根巴图

机构：[1]中国林业科学研究院荒漠化研究所,北京100091;[2]中国林业科学研究院沙漠林业实验中心,内蒙古磴口015200;[3]北京林业大学水土保持学院,北京100083

年份：2020

卷号：37

期号：2

起止页码：304-313

中文期刊名：干旱区研究

外文期刊名：Arid Zone Research

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：中国林业科学研究院中央公益性科研院所基本科研业务费专项项目(CAFYBB2017ZA06)资助。

语种：中文

中文关键词：极端气候;时空趋势;周期特征;交叉小波变换;柴达木盆地

外文关键词：climate extremes;spatiotemporal trend;periodic feature;cross wavelet transform;Qaidam Basin

分类号：P46

摘要：利用柴达木盆地8个气象站1960-2014年气温和降水的日值数据,分析该区域极端气候的时空变化趋势、周期特征及极端降水对南亚季风和西风环流变化的响应。结果表明:1960-2014年柴达木盆地极端温度总体表现出显著的变暖趋势,变化幅度在空间上表现为由西向东逐渐降低;极端降水频率、降水量和降水强度均有所增加,但中西部地区变化速率远小于东部,仅连续无雨日数通过了显著性检验。平均温差、霜冻日数、冷夜日数的周期特征较弱,结冰日数和生长季日数的显著周期都有变长的趋势,而最低气温的显著周期有变短趋势;极端降水指标均有显著的周期特征,其中连续无雨日数和最大5日降水量的显著周期有变短趋势。同时,南亚季风环流与各极端降水指标间相关振荡的凝聚性很强,具有较强的关联性;而西风环流只与普通日降水强度存在着较强的共振关系。研究结果可为柴达木盆地可持续发展和生态环境保护提供理论与实践参考。
In this study,the meteorological data obtained from eight weather stations enabled the analysis of the spatiotemporal trends and periodic features of the climate extremes over the Qaidam Basin from 1960 to 2014.The responses of the precipitation extremes to the South Asian summer monsoon and westerly circulation were also examined.The results indicated that the variability and trends in the Qaidam Basin demonstrate a significant tendency toward warm conditions from 1960 to 2014 and that the magnitude of this trend decreased from the west to the east on a regional scale.The changes in extreme precipitation indicated that the frequency,intensity,and amount of heavy precipitation increased over time;consecutive dry days were considered to be significant.The trend magnitudes in the central and western regions were considerably less than those in the eastern region.The periodic features of the diurnal temperature range,frost days,and cold night frequency were weaker than those of other extreme temperature indices;the ice days and length of the seasons were longer,whereas the coldest nights were shorter.All the extreme precipitation indices exhibited obvious periodic features,and the significant periods of the consecutive dry days and maximum five-day precipitation tended to reduce with time.Meanwhile,the coherence of the oscillation with respect to each extreme precipitation index based on the South Asian summer monsoon as well as their correlations are particularly strong;however,only the simple daily intensity index exhibited a significant and steady oscillation with westerly circulation.The results of this study may provide theoretical and practical references for achieving sustainable development and ecological protection in the Qaidam Basin.