柴达木盆地气溶胶光学厚度时空分布特征及气象要素影响分析  

Spatial and Temporal Distribution Characteristics of AOD and Influence of Meteorological Factors in Qaidam Basin

作　　者：肖鸿丹 何清[2] 袁淑杰[1] 李京龙 阴璐璐 XIAO Hongdan;HE Qing;YUAN Shujie;LI Jinglong;YIN Lulu(College of Atmospheric Sciences,Chengdu University of Information Technology/Sichuan Key Laboratory of Plateau Atmosphere and Environment,Chengdu 610225,Sichuan,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;College of Geography Remote sensing Sciences,Xinjiang University,Urumqi 830017,China;College of Geography Science and Tourism,Xinjiang Normal University,Urumqi 830054,China)

机构地区：[1]成都信息工程大学大气科学学院,四川成都610225 [2]中国气象局乌鲁木齐沙漠研究所新疆塔克拉玛干沙漠气象国家野外科学观测站中国气象局塔克拉玛干沙漠气象野外科学试验基地新疆维吾尔自治区沙漠气象与沙尘暴重点实验室,新疆乌鲁木齐830002 [3]新疆大学地理与遥感科学学院,新疆乌鲁木齐830017 [4]新疆师范大学地理科学与旅游学院,新疆乌鲁木齐830054

出　　处：《高原气象》2024年第3期762-774,共13页Plateau Meteorology

基　　金：国家自然科学基金项目(42030612);第二次青藏高原综合科学考察研究项目(2019QZKK010206)。

摘　　要：基于MODIS MCD19A2气溶胶数据集,利用线性趋势、Spearman相关性分析及?ngstr?m指数内插法,探究柴达木盆地2001-2021年大气气溶胶光学厚度的时空分布特征及气象因子影响。结果表明:在年际尺度上,柴达木盆地AOD波动上升,年增幅为3.74%,年均值为0.110±0.002;在季节尺度上,AOD季节性变化明显,其值由高到低分别为春季、夏季、秋季、冬季,其中,春夏季AOD呈波动变化,秋冬季AOD无明显变化;月尺度上,AOD呈单峰型,峰值为4月。在空间上,AOD高值区位于柴达木盆地腹部,呈现中间高四周低的分布特征,低值区位于昆仑山脉和祁连山脉等高海拔地区及植被覆盖率较高的区域。气象要素对AOD都有着一定影响,其中风速、温度、相对湿度、云量和降水都与AOD呈正相关,风速和温度对AOD的影响最大。Based on the MODIS MCD19A2 aerosol dataset,the temporal and spatial distribution characteristics of the atmospheric aerosol optical thickness(AOD)and the influence of meteorological factors in the Qaidam Basin from 2001 to 2021 were investigated by using linear trend,Spearman correlation analysis,andÅngström exponential interpolation,and the results show that:(1)On the interannual scale,the AOD in the Qaidam Basin fluctuates upward,with an annual increase of 3.74%and an annual mean value of 0.110±0.002;on the seasonal scale,AOD has obvious seasonal changes,and its value from high to low is spring,summer,autumn and winter,respectively.AOD in spring and summer fluctuates,while AOD in autumn and winter has no obvious change.on the monthly scale,the AOD is in the shape of a single peak,and the peak value is in April.(2)In space,the high value area of AOD is located in the hinterland of Qaidam Basin,showing the distribution characteristics of high in the middle and low around,and the low value area is located in the high altitude areas such as Kunlun Mountain Range and Qilian Mountain Range and the area with high vegetation cover.(3)Meteorological factors have a certain influence on AOD,among which wind speed,temperature,relative humidity,cloudiness and precipitation are positively correlated with AOD,and wind speed and temperature have the greatest influence on AOD.

关 键 词：气溶胶光学厚度 时空分布 个例分析 气象要素 柴达木盆地 

分 类 号：X513[环境科学与工程—环境工程]