• 关键词：AOD  大兴安岭  沙尘气溶胶  风  相对湿度

• 基金项目：国家自然科学基金（No.41461102，41761101）；内蒙古科技计划项目（No.201502113，201602086）；内蒙古财政厅科技创新引导项目

• 林泓锦
• 内蒙古自治区气象灾害监测预警与人工影响天气中心, 呼和浩特 010051

• 都瓦拉
• 内蒙古自治区生态与农业气象中心, 呼和浩特 010051

• 玉山
• 内蒙古自治区遥感与地理信息系统重点实验室, 呼和浩特 010022

• 苏玥
• 内蒙古自治区气象灾害监测预警与人工影响天气中心, 呼和浩特 010051

• 摘要：通过对2002-2018年采用融合算法反演的MODIS气溶胶光学厚度（AOD）数据进行分析，研究了内蒙古气溶胶的时空分布特征.结果表明，内蒙古AOD值在东北部地区最高，其次为工业发达的中西部地区，最低值出现在大兴安岭及其山脉上空.全年AOD峰值出现在4月和6月，4月峰值主要受沙尘影响，6月峰值受季节雨带位移带来的湿度变化影响.中部气溶胶成分以沙尘气溶胶为主，而中西部和东北部气溶胶成分中存在大量人为源气溶胶.风场和相对湿度场与AOD值的年代际变化有关.

• Abstract：Through analyzing the MODIS combined aerosol optical depth (AOD) data in 2002-2018, the spatial and temporal distribution characteristics of aerosols in Inner Mongolia are estimated. The highest AOD value in Inner Mongolia is in the northeast region, followed by the mid-west region where industry is developed, the lowest value being in the Daxinganling Mountains. The peak of AOD value in the whole year is in April and June, and the former is mainly affected by sand and dust. However, in June, the peak value is affected by the humidity change caused by the seasonal rain-belt march. The aerosol component in the mid-area is dominated by dust aerosol, while the mid-west and the northeast are affected by a large number of anthropogenic aerosols. The wind field and relative humidity are related to the interdecadal variations of AOD.

• Key words：AOD  Daxinganling Mountains  sand and dust  wind  relative humidity

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