利用对流层监测仪进行二氧化氮的高分辨率绘图：加拿大油砂地区的初步结果与验证
High resolution mapping of nitrogen dioxide with TROPOMI: First results and validation over the Canadian oil sands.
作者信息
Griffin Debora, McLinden Chris A, Boersma Folkert, Bourassa Adam, Dammers Enrico, Degenstein Doug, Eskes Henk, Fehr Lukas, Fioletov Vitali, Hayden Katherine, Kharol Shailesh K, Li Shao-Meng, Makar Paul, Martin Randall V, Mihele Cristian, Mittermeier Richard L, Krotkov Nickolay, Sneep Maarten, Lamsal Lok N, Ter Linden Mark, van Geffen Jos, Veefkind Pepijn, Wolde Mengistu, Zhao Xiaoyi
机构信息
Air Quality Research Division, Environment and Climate Change Canada, Toronto, Ontario, Canada.
Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands.
出版信息
Geophys Res Lett. 2019 Jan 28;46(2):1049-1060. doi: 10.1029/2018GL081095. Epub 2018 Dec 28.
UNLABELLED
TROPOMI, on-board the Sentinel-5 Precursor satellite is a nadir-viewing spectrometer measuring reflected sunlight in the ultraviolet, visible, near-infrared, and shortwave infrared spectral range. From these spectra several important air quality and climate-related atmospheric constituents are retrieved at an unprecedented high spatial resolution, including nitrogen dioxide (NO). We present the first retrievals of TROPOMI NO over the Canadian Oil Sands, contrasting them with observations from the OMI satellite instrument, and demonstrate its ability to resolve individual plumes and highlight its potential for deriving emissions from individual mining facilities. Further, the first TROPOMI NO validation is presented, consisting of aircraft and surface in-situ NO observations, as well as ground-based remote-sensing measurements between March and May 2018. Our comparisons show that the TROPOMI NO vertical column densities are highly correlated with the aircraft and surface in-situ NO observations, and the ground-based remote-sensing measurements with a low bias (15-30 %) over the Canadian Oil Sands.
PLAIN LANGUAGE SUMMARY
Nitrogen dioxide (NO) is a pollutant that is linked to respiratory health issues and has negative environmental impacts such as soil and water acidification. Near the surface the most significant sources of NO are fossil fuel combustion and biomass burning. With a recently launched satellite instrument (TROPOspheric Monitoring Instrument; TROPOMI) NO can be measured with an unprecedented combination of accuracy, spatial coverage, and resolution. This work presents the first TROPOMI NO measurements near the Canadian Oil Sands and shows that these measurements have an outstanding ability to detect NO on a very high horizontal resolution that is unprecedented for satellite NO observations. Further, these satellite measurements are in excellent agreement with aircraft and ground-based measurements.
未标注
搭载于哨兵-5号前驱卫星上的对流层监测仪（TROPOMI）是一台天底观测光谱仪，用于测量紫外线、可见光、近红外和短波红外光谱范围内的反射太阳光。从这些光谱中，可以以前所未有的高空间分辨率反演几种重要的与空气质量和气候相关的大气成分，包括二氧化氮（NO）。我们展示了对流层监测仪首次在加拿大油砂地区反演的二氧化氮数据，将其与臭氧监测仪（OMI）卫星仪器的观测结果进行对比，并证明了它分辨单个羽流的能力，以及突出了其从单个采矿设施推算排放量的潜力。此外，还展示了对流层监测仪首次二氧化氮验证结果，该验证包括2018年3月至5月期间的飞机和地面原位二氧化氮观测，以及地基遥感测量。我们的比较表明，对流层监测仪的二氧化氮垂直柱密度与飞机和地面原位二氧化氮观测以及地基遥感测量高度相关，在加拿大油砂地区偏差较低（15%-30%）。
通俗易懂的总结
二氧化氮（NO）是一种与呼吸系统健康问题相关的污染物，对环境有负面影响，如土壤和水体酸化。在地表附近，二氧化氮的最重要来源是化石燃料燃烧和生物质燃烧。借助最近发射的卫星仪器（对流层监测仪器；TROPOMI），可以以前所未有的精度、空间覆盖范围和分辨率组合来测量二氧化氮。这项工作展示了对流层监测仪首次在加拿大油砂地区附近测量二氧化氮的结果，表明这些测量具有卓越的能力，能够在极高的水平分辨率下检测二氧化氮，这在卫星二氧化氮观测中是前所未有的。此外，这些卫星测量结果与飞机和地基测量结果高度吻合。
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