High-resolution measurements from the airborne Atmospheric Nitrogen Dioxide Imager (ANDI)
High-resolution measurements from the airborne Atmospheric Nitrogen Dioxide Imager (ANDI)
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DOI：
10.5194/amt-8-4735-2015
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发表时间：
2015-01-01
影响因子：
3.8
通讯作者：
Leigh, R. J.
中科院分区：
文献类型：
--
作者：
Lawrence, J. P.;Anand, J. S.;Leigh, R. J.
二氧化氮既是直接影响健康的主要污染物，也是二次污染物臭氧的关键前体。本文报道了大气二氧化氮成象仪（ANDI）遥感系统的研制、特性和试飞情况。ANDI系统包括一个成像UV/维斯光栅光谱仪，能够捕获散射的太阳光光谱，通过DOAS斜柱密度和垂直柱密度measurement.Results的对流层二氧化氮（NO2）的浓度测定显示在2013年2月的一个无云的冬日，在英国的莱斯特城上空的ANDI测试飞行。检索到的NO2柱网格表面分辨率为80 m x 20 m，揭示了莱斯特市周围一系列地点的热点，包括道路交叉口，火车站，主要停车场，重工业区，附近的机场（东米德兰兹）和发电站（Ratcliffe-on-Soar）在市中心，NO2排放的主要来源被确定为道路交通，有助于背景浓度以及产生局部热点。定量分析显示，在整个飞行过程中，市中心的城市增量显着增加。
Nitrogen dioxide is both a primary pollutant with direct health effects and a key precursor of the secondary pollutant ozone. This paper reports on the development, characterisation and test flight of the Atmospheric Nitrogen Dioxide Imager (ANDI) remote sensing system. The ANDI system includes an imaging UV/Vis grating spectrometer able to capture scattered sunlight spectra for the determination of tropospheric nitrogen dioxide (NO2) concentrations by way of DOAS slant column density and vertical column density measurements.Results are shown for an ANDI test flight over Leicester City in the UK on a cloud-free winter day in February 2013. Retrieved NO2 columns gridded to a surface resolution of 80m x 20m revealed hotspots in a series of locations around Leicester City, including road junctions, the train station, major car parks, areas of heavy industry, a nearby airport (East Midlands) and a power station (Ratcliffe-on-Soar). In the city centre the dominant source of NO2 emissions was identified as road traffic, contributing to a background concentration as well as producing localised hotspots. Quantitative analysis revealed a significant urban increment over the city centre which increased throughout the flight.