青藏高原典型冰川群卫星遥感资料的检验及其与局地气候联系  

Testing satellite remote sensing data of typical glacier groups and a preliminary study of the associated local climate in the Tibetan Plateau

作　　者：王园香[1] 郑照军[1] 陈洁 WANG Yuan-xiang;ZHENG Zhao-jun;CHEN Jie(Key Laboratory of Radiometric Calibration-and Validation for Environmental Satellites,National Satellite Meteorological Center(National Center for Space Weather),Innovation Center for Xiyianmin Meteorological Satelite,China Meteorological Administration,Beijing 100081,China)

机构地区：[1]中国气象局中国遥感卫星辐射测量和定标重点开放实验室,国家卫星气象中心(国家空间天气监测预警中心),许健民气象卫星创新中心,北京100081

出　　处：《兰州大学学报（自然科学版）》2022年第3期306-312,共7页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(41775084);财政部公益性行业(气象)科研专项(GYHY201306054)。

摘　　要：采用中分辨率成像光谱仪数据中的积雪覆盖日数,利用百分比阈值法,提取青藏高原典型冰川群面积,进行滑动t检验和M-K检验,与人工判识结果和线性拟合结果进行对比并进行质量检验,在资料真实可信的基础上,分析其时空变化特征.结合气候因子,采用回归分析法,研究不同区域高原典型冰川群与局地气候的联系.结果表明,假如冬季青藏高原典型冰川群面积增加,至夏季一部分积雪融化后,典型冰川群面积仍比常年偏大,故其上空温度也比常年偏低、湿度偏大,形成冷岛和高湿中心,当过境气流的水平湍流加强时,青藏高原典型冰川群上空形成阻岛,产生降水天气,非湍流区降水不会增加.Using the threshold method of percentage of days covered with snow and extracting the area of plateau typical glacier groups,a quality inspection for these data by the sliding t-test and M-K test were performed,and a comparison made between manual identification and linear fitting results.And on that basis,space-time distributions of plateau typical glacier groups were analyzed.Combined with climate factors and using regression analysis,the associated local climate with the typical glacier groups in different regions of the plateau were studied,with the results that,if the area of typical glacial groups in winter increased,and after some of the snow had melted in summer,the glacier groups were still larger than usual.The air temperature above them was also lower and the humidity higher than usual,and then cold islands and high humidity centers were formed.When the horizontal turbulence of the cross-boundary airstream strengthened,barrier islands were formed over typical glacier groups,rainfall was produced,and precipitation did not increase in non-turbulent areas.

关 键 词：高原典型冰川群 卫星遥感资料 气候 

分 类 号：P46[天文地球—大气科学及气象学]