摘要
开展塔克拉玛干沙漠沙垄起伏地形夏季地表温度观测试验,旨在为塔克拉玛干沙漠环境陆面过程研究提供科学依据。2019年6月7日—9月2日在塔中地区,沿沙垄迎风坡以及背风坡底部、中部、上部、顶点及垄间谷地共设8个地表温度观测点。结果表明:(1)夏季沙垄地表温度最高温出现在垄间谷地,为74.63℃,最低温出现在迎风坡底部,为10.52℃;地表温度一天中在07:00左右达到最低,15:00左右达到最高。(2)晴天、多云以及浮尘天气各观测点地表温度日均变化曲线呈单峰型,降水、扬沙及沙尘暴天气地表温度呈双峰型;地表温度的最高温与日均值的最大值均出现在晴天的垄间谷地,地表温度的最低温及日均值的最小值均出现在降水天气的迎风坡底部。(3)沙垄顶点与底部夏季地表温差为0~18.62℃,迎风坡与背风坡夏季地表温差为0~16.93℃。其中,沙垄顶点与背风坡底部在晴天的地表温差最大,为0~18.62℃,而沙垄顶点与迎风坡底部在降水天气的地表温差最小,为0.01~6.18℃;沙垄迎风坡和背风坡在晴天的地表温度温差最大,为0.01~16.93℃,降水天气的温差最小,为0.01~4.15℃。塔克拉玛干沙漠地表温度变化特征在不同典型天气类型下不同,沙垄顶点与底部、迎风坡与背风坡地表温度差异受风力及起伏沙丘作用明显。
An experiment of summer land surface temperature(LST)observation on dunes in the Taklimakan Desert(TD)was conducted to provide a scientific basis for the study of environmental land surface processes in the TD.Eight LST observation sites were established along the bottom,middle,upper and top of the windward and leeward sides of the dune and the valleys between the dunes from June 7 to September 2,2019 in the TD.The results shows that:(1)In summer,the highest LST appears in the valleys between the dunes,which is 74.63℃,and the lowest LST appears at the bottom of the dune windward sides,which is 10.52℃.The LST reaches its lowest at approximately 07:00 and its highest at approximately 15:00 during the day.(2)The average daily variation curve of LST on sunny,cloudy and dusty days presents a unimodal pattern,while that on precipitation,sand blowing and sandstorm days presents a bimodal pattern.The highest LST and the maximum daily mean value occur in the valleys between the dunes on sunny days,while the lowest LST and the minimum daily mean value occur at the bottom of the dune windward sides on rainy days.(3)The LST difference between the top and bottom of dune in summer ranges from 0 to 18.62℃,and the LST difference between the dune windward and leeward sides ranges from 0 to 16.93℃.Among them,the range of LST difference between the top of dune and the bottom of dune leeward sides is the largest on sunny days,which is 0-18.62℃,while the range of LST difference between the top of dune and the bottom of dune windward sides is the smallest on rainy days,which is 0.01-6.18℃.The LST difference between windward sides and leeward sides of dune is the largest on sunny days,which is 0.01-16.93℃,and the smallest on rainy days,which is 0.01-4.15℃.The variation characteristics of LST in the TD are different under different typical weather types.The difference of LST between the top and bottom of dune,dune windward and the leeward sides is obviously affected by wind and fluctuated dunes.
作者
王国胜
何清
金莉莉
赵佳伟
阿力木·阿巴斯
邢红艳
WANG Guosheng;HE Qing;JIN Lili;ZHAO Jiawei;Alim Abbas;XING Hongyan(College of Geography Science and Tourism,Xinjiang Normal University,Urumqi,830054,China;Institute of Desert Meteorology,China Meteorological Administration/National observation and Research Station of Desert Meteorology,Taklimakan Desert of Xinjiang/Taklimakan Desert Meteorology Field Experiment Station of China Meteorological Administration/Xinjiang Key Laboratory of Desert Meteorology and Sandstorm,Urumqi,830002,China;School of Earth Sciences,Yunnan University,Kunming 650500,China)
出处
《沙漠与绿洲气象》
2022年第6期131-140,共10页
Desert and Oasis Meteorology
基金
国家自然科学基金重点项目(NO.41830968,42030612)。
关键词
塔克拉玛干沙漠
起伏沙丘
地表温度
空间差异
Taklimakan Desert
fluctuated dunes
land surface temperature
spatial difference