Systematic analysis of tropospheric NO 2 long-range transport events detected in GOME-2 satellite data
Systematic analysis of tropospheric NO 2 long-range transport events detected in GOME-2 satellite data
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DOI：
10.5194/acp-14-7367-2014
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发表时间：
2013-11
影响因子：
6.3
通讯作者：
A. Zien;A. Richter;A. Hilboll;A. Blechschmidt;J. Burrows
中科院分区：
文献类型：
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作者：
A. Zien;A. Richter;A. Hilboll;A. Blechschmidt;J. Burrows
摘要。二氧化氮的洲际远程运输（LRT）事件将空气污染的影响从排放区转移到偏远的原始地区。本文利用GOME-2/MetOp-A仪器测量的对流层NO2柱，用一种专门的算法检测了输送羽流，并利用HYSPLIT拉格朗日输运模型追踪了羽流的来源。使用该算法，我们找到了2007年至2011年期间海洋上空的3808个轻轨事件。轻轨事件经常发生在中纬度地区，通常出现在沿海高排放地区。在自由对流层中，二氧化氮的羽状物可以在数天内到达极地海洋大气或其他大陆。它们沿着特定的路线行进，并起源于连续的人为排放和诸如丛林火灾之类的排放事件。大多数NO2轻轨事件发生在秋季和冬季，这是气象条件和排放最有利的时期。对气象资料的评价表明，观测到的二氧化氮轻轨常与经过排放区的气旋有关。
Abstract. Intercontinental long-range transport (LRT) events of NO2 relocate the effects of air pollution from emission regions to remote, pristine regions. We detect transported plumes in tropospheric NO2 columns measured by the GOME-2/MetOp-A instrument with a specialized algorithm and trace the plumes to their sources using the HYSPLIT Lagrangian transport model. With this algorithm we find 3808 LRT events over the ocean for the period 2007 to 2011. LRT events occur frequently in the mid-latitudes, emerging usually from coastal high-emission regions. In the free troposphere, plumes of NO2 can travel for several days to the polar oceanic atmosphere or to other continents. They travel along characteristic routes and originate from both continuous anthropogenic emission and emission events such as bush fires. Most NO2 LRT events occur during autumn and winter months, when meteorological conditions and emissions are most favorable. The evaluation of meteorological data shows that the observed NO2 LRT is often linked to cyclones passing over an emission region.