摘要
古尔班通古特沙漠是中国唯一冬季存在长期积雪的沙漠,在此特殊地理环境下,沙漠及周边区域冬季雪深和边界层高度的时空变化特征和相互关系尚未明确。本文利用1980—2019年SMMR(Scanning Multichannel Microwave Radiometer)、SSM/I(Special Sensor Microwave/Imager)、SSMI/S(Special Sensor Microwave Imager/Sounder)被动微波遥感雪深数据、古尔班通古特沙漠腹地雪深观测数据和ERA5再分析资料(the Fifth Generation ECMWF Reanalysis)边界层高度数据,分析了沙漠及周边区域冬季雪深和边界层高度的时空变化特征与相互关系。结果表明:古尔班通古特沙漠及周边区域冬季雪深年均值为8.45 cm,整体呈现东北部和南部积雪较深,其他区域积雪较浅并呈现出由沙漠中心区域向四周逐渐减少的特点,雪深在古尔班通古特沙漠及其东北、南边的邻近区域呈升高趋势,剩余地区呈下降趋势。古尔班通古特沙漠及周边区域冬季边界层高度年均值为105.54 m,呈现东南部和西北部高,中心沙漠区域、东北部、西南部较低的特点,边界层高度在沙漠及周边区域升高而其他区域降低。古尔班通古特沙漠的冬季雪深和大气边界层高度时空变化整体呈负相关,其中93.17%以上的沙漠区域呈负相关,平均相关系数为-0.32,最大相关系数绝对值为-0.58,空间相关系数为-0.42(P<0.05)。
The Gurbantunggut Desert is the only desert in China with long-term snow cover in winter.In such a special geographical environment,the temporal and spatial variation of winter snow depth and boundary layer height over the desert and its surrounding areas are not clear.To explore its temporal and spatial variations and relationships,this paper compiled 2014—2019 SMMR(Scanning Multichannel Microwave Radiometer),SSM/I(Special Sensor Microwave/Imager),SSMI/S(Special Sensor Microwave Imager/Sounder)passive micro⁃wave snow depth data,snow depth observations in the hinterland of the Gurbantunggut Desert,and boundary layer height data from the Fifth Generation ECMWF Reanalysis,for the analysis of the temporal and spatial vari⁃ation of winter snow depth and boundary layer height in desert and its surrounding areas,using trend analysis method and Pearson correlation analyses are analyzed.It provides a reference for understanding the impact of Gurbantunggut Desert snow on regional atmospheric boundary layer.The results show that the annual average winter snow depth in the Gurbantunggut Desert and its surrounding areas is 8.45 cm,showing a deep snow cov⁃er in the northeast and south as a whole,and a shallow snow cover in other areas.The snow cover gradually de⁃creases from the center of the desert to the surrounding areas.The snow depth in the Gurbantunggut Desert and its northeast and south adjacent areas shows a rising trend,while the remaining areas show a downward trend.The average annual height of the boundary layer in the Gurbantunggut Desert and its surrounding areas in winter is 105.54 m,which is high in the southeast and northwest,and shallow in the central,northeast and southwest desert area.The height of the boundary layer in the desert and its surrounding areas increases while that in other areas decreases.The winter snow depth in Gurbantunggut Desert is negatively correlated with the spatial and temporal changes of the atmospheric boundary layer height,of which 93.17%of the desert areas are negatively
作者
张梦肖
王豫
买买提艾力·买买提依明
刘永强
高佳程
肖婉秋
温聪
宋美琪
艾力亚尔·艾海提
王卫平
孟湘尧
ZHANG Mengxiao;WANG Yu;Ali Mamtimin;LIU Yongqiang;GAO Jiacheng;XIAO Wanqiu;WEN Cong;SONG Meiqi;Ailiyaer Aihaiti;WANG Weiping;MENG Xiangyao(College of Geography and Remote sensing Sciences,Xinjiang University,Urumqi 830017,China;Xinjiang Key Laboratory of Oasis Ecology,Xinjiang University,Urumqi 830017,China;Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China;National Observation and Research Station of Desert Meteorology,Taklimakan Desert of Xinjiang/Xinjiang Key Laboratory of Desert Meteorology and Sandstorm,Urumqi 830002,China;Taklimakan Desert Meteorological Field Experiment Base/Key Laboratory of Tree-ring Physical and Chemical Research,China Meteorological Administration,Urumqi 830002,China)
出处
《冰川冻土》
CSCD
北大核心
2022年第5期1558-1569,共12页
Journal of Glaciology and Geocryology
基金
国家自然科学基金项目(41875023)
中央级公益科研院所基本科研业务费项目(IDM2021005
IDM2021001)
国家重点研发计划(2019YFC1510505)资助。
关键词
古尔班通古特沙漠
雪深
大气边界层高度
时空分布
Gurbantunggut Desert
snow depth
atmospheric boundary layer height
time and space distribution
