气候变化领域集成服务门户(CCPortal): Retrieval of total column and surface NO2 from Pandora zenith-sky measurements

CCPortal

DOI	10.5194/acp-19-10619-2019
	Retrieval of total column and surface NO2 from Pandora zenith-sky measurements
	Zhao X.; Griffin D.; Fioletov V.; McLinden C.; Davies J.; Ogyu A.; Lee S.C.; Lupu A.; Moran M.D.; Cede A.; Tiefengraber M.; Müller M.
发表日期	2019
ISSN	16807316
起始页码	10619
结束页码	10642
卷号	19 期号:16
英文摘要	Pandora spectrometers can retrieve nitrogen dioxide (NO2) vertical column densities (VCDs) via two viewing geometries: direct Sun and zenith sky. The direct-Sun NO2 VCD measurements have high quality (0.1 DU accuracy in clear-sky conditions) and do not rely on any radiative transfer model to calculate air mass factors (AMFs); however, they are not available when the Sun is obscured by clouds. To perform NO2 measurements in cloudy conditions, a simple but robust NO2 retrieval algorithm is developed for Pandora zenith-sky measurements. This algorithm derives empirical zenith-sky NO2 AMFs from coincident high-quality direct-Sun NO2 observations. Moreover, the retrieved Pandora zenith-sky NO2 VCD data are converted to surface NO2 concentrations with a scaling algorithm that uses chemical-transport-model predictions and satellite measurements as inputs. NO2 VCDs and surface concentrations are retrieved from Pandora zenith-sky measurements made in Toronto, Canada, from 2015 to 2017. The retrieved Pandora zenith-sky NO2 data (VCD and surface concentration) show good agreement with both satellite and in situ measurements. The diurnal and seasonal variations of derived Pandora zenith-sky surface NO2 data also agree well with in situ measurements (diurnal difference within ±2 ppbv). Overall, this work shows that the new Pandora zenith-sky NO2 products have the potential to be used in various applications such as future satellite validation in moderate cloudy scenes and air quality monitoring. © 2019 The Author(s).
语种	英语
scopus关键词	atmospheric chemistry; clear sky; diurnal variation; in situ measurement; nitrogen dioxide; seasonal variation; spectrometer; Canada; Ontario [Canada]; Toronto
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/144757
作者单位	Air Quality Research Division, Environment and Climate Change Canada, Toronto, M3H 5T4, Canada; NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; LuftBlick, Kreith 39A, Mutter, 6162, Austria; Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
推荐引用方式 GB/T 7714	Zhao X.,Griffin D.,Fioletov V.,et al. Retrieval of total column and surface NO2 from Pandora zenith-sky measurements[J],2019,19(16).
APA	Zhao X..,Griffin D..,Fioletov V..,McLinden C..,Davies J..,...&Müller M..(2019).Retrieval of total column and surface NO2 from Pandora zenith-sky measurements.Atmospheric Chemistry and Physics,19(16).
MLA	Zhao X.,et al."Retrieval of total column and surface NO2 from Pandora zenith-sky measurements".Atmospheric Chemistry and Physics 19.16(2019).