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MAIAC Thermal Technique for Smoke Injection Height From MODIS

机译:MODIS烟雾喷射高度的MAIAC热技术

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We present a new algorithm to derive smoke plume height ( $ext{H}<^>{mathrm {a}}$ ) using the thermal contrast from the rising mixture of aerosol and emitted gases in the Moderate Resolution Imaging Spectroradiometer (MODIS) 11- $mu ext{m}$ channel. Validation shows good agreement with the wind-corrected Multi-angle Imaging SpectroRadiometer (MISR)-MISR Interactive Explorer (MINX) values, with about 60% of the MODIS Terra thermal retrievals within 500 m of MISR $ext{H}<^>{mathrm {a}}$ and 450 m lower on average. The bias is expected because the thermal technique represents an effective rather than a top plume height from MISR MINX. The comparison of MODIS Aqua retrievals with Cloud-Aerosol LiDAR with Orthogonal Polarization (CALIOP) Cloud-Aerosol LiDAR and Infrared Pathfinder Satellite Observations (CALIPSO) shows similar statistics, with a standard deviation of 458 m for the mean plume height and 216 m lower on average. $ext{H}<^>{mathrm {a}}$ is part of the Multi-Angle Implementation of Atmospheric Correction (MAIAC) MODIS Collection 6 suite of products (MCD19), accessible via the Land Product Distributed Active Archive Center (LP DAAC). Aerosol injection height is reported in the daily MAIAC atmospheric product MCD19A2 along with the cloud mask (CM), column water vapor, aerosol optical depth (AOD), AOD uncertainty, and aerosol type, at 1-km resolution on a global sinusoidal grid. Despite some limitations, the vastly increased coverage from MODIS observations makes it a valuable data set complementing the established MISR and CALIOP products.
机译:我们介绍了一种新的算法来使用从温泉和中断成像光谱分布计(MODIS中的气溶胶和发射气体的上升混合物(MODIS)的热对比度来派生烟雾羽毛高度($ text {h} <^> { {a}} $) )11- $ mu text {m} $频道。验证与风校正的多角度成像光谱仪(MISR)-MISR交互式资源管理器(MINX)值展示了良好的一致性,在MISR $ Text {H} <^>中,大约60%的Modis Terra热检索。 { mathrm {a}} $和450米平均降低。预期偏差是因为热技术代表了来自MISR minx的有效而不是顶部羽流高度。 Modis Aqua Retrivals与具有正交极化(Caliop)云气溶胶激光雷达和红外探测器卫星观测(Calipso)的云 - 气溶胶激光葡萄球菌的比较显示了类似的统计数据,对于平均羽流高度,258米的标准差为216米平均数。 $ text {h} <^> { mathrm {a}} $是大气校正的多角度执行的一部分(MAIAC)MODIS系列6套件产品(MCD19),可通过土地产品分布式活动档案中心访问(LP DAAC)。在每日MAIAC大气产品MCD19A2中报告气溶胶喷射高度以及云面罩(CM),柱水蒸气,气溶胶光学深度(AOD),AOD不确定度和气溶胶类型,在全球正弦网格上以1公里的分辨率。尽管有一些局限性,Modis观察的大大增加了覆盖率使其成为符合已建立的MISR和Caliop产品的有价值的数据集。

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