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首页> 外文期刊>Atmospheric chemistry and physics >Detection of anthropogenic dust using CALIPSO lidar measurements
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Detection of anthropogenic dust using CALIPSO lidar measurements

机译：使用CALIPSO激光雷达测量检测人为灰尘

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Anthropogenic dusts are those produced by human activities on disturbedsoils, which are mainly cropland, pastureland, and urbanized regions, and are asubset of the total dust load which includes natural sources from desertregions. Our knowledge of anthropogenic dusts is still very limited due to alack of data. To understand the contribution of anthropogenic dust to thetotal global dust load, it is important to identify it apart from total dust. Inthis study, a new technique for distinguishing anthropogenic dust fromnatural dust is proposed by using Cloud-Aerosol Lidar and Infrared PathfinderSatellite Observation (CALIPSO) dust and planetary boundary layer (PBL)height retrievals along with a land use data set. Using this technique, theglobal distribution of dust is analyzed and the relative contribution ofanthropogenic and natural dust sources to regional and global emissions areestimated. Results reveal that local anthropogenic dust aerosol due to humanactivity, such as agriculture, industrial activity, transportation, andovergrazing, accounts for about 25 % of the global continental dust load.Of these anthropogenic dust aerosols, more than 53 % come from semi-aridand semi-wet regions. Annual mean anthropogenic dust column burden (DCB)values range from 0.42 g m?2, with a maximum in India, to0.12 g m?2, with a minimum in North America. A better understanding ofanthropogenic dust emission will enable us to focus on human activities inthese critical regions and with such knowledge we will be more able toimprove global dust models and to explore the effects of anthropogenicemission on radiative forcing, climate change, and air quality in the future.
机译：人为扬尘是人类在受干扰的土壤上活动产生的尘土，主要是农田，牧场和城市化地区，是总尘埃负荷的一个子集，其中包括来自沙漠地区的自然资源。由于缺乏数据，我们对人为扬尘的知识仍然非常有限。要了解人为粉尘对全球总粉尘负荷的贡献，重要的是将其与总粉尘区分开来。在这项研究中，通过使用云气溶胶激光雷达和红外探路者卫星观测（CALIPSO）尘埃和行星边界层（PBL）高度检索以及土地利用数据集，提出了一种区分人为尘埃和自然尘埃的新技术。使用该技术，分析了粉尘的全球分布，并估算了人为和自然粉尘源对区域和全球排放的相对贡献。结果表明，由于人类活动（如农业，工业活动，运输和过度放牧）而导致的局部人为粉尘气溶胶约占全球大陆粉尘负荷的25％，在这些人为粉尘气溶胶中，超过53％来自半干旱和半干旱。潮湿的地区。人为的尘埃柱年平均负荷值（DCB）值范围从0.42 gm ？2 （印度最大）到0.12 gm ？2 （北美最小） 。更好地了解人为扬尘排放将使我们能够专注于这些关键区域的人类活动，并且借助这些知识，我们将更有能力改善全球扬尘模型，并探讨人为排放对未来辐射强迫，气候变化和空气质量的影响。 。

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