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TROPOMI Geometry-dependent Lambertian-Equivalent surface Reflectivity (GLER) Product for Improved Trace-Gas RetrievalAccurate information about the reflectivity of the Earth's surface is required for most satellite retrievals of atmospheric composition, and this information is generally taken from monthly surface reflectivity climatology that neglects angular dependence. Previously we introduced Geometry-dependent Lambertian-equivalent surface reflectivity (GLER) which captures solar and satellite viewing angle dependence as well as daily and seasonal changes. GLER is calculated from simulations of Rayleigh-only top-of-atmosphere (TOA) radiances over non-Lambertian surfaces. We use NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) bidirectional reflectance distribution function (BRDF) product over land and the wind-dependent Cox–Munk wave-facet slope distribution including water-leaving radiance over water to accounts for surface BRDF. We have developed global GLER product, previously for the Ozone Monitoring Instrument (OMI) and recently for Sentinel-5 Precursor (S5P) TROPOspheric Monitoring Instrument (TROPOMI) with several new improvements and updates. We have implemented the near real time daily V006 MODIS MCD43C1 BRDF data and gap-filled with a daily BRDF coefficient climatology created from 2002-2017 V006 MCD43GF data. The NASA’s Global Modelling Initiative hourly 0.25 x 0.25 deg Replay simulations are used for more accurate determination of pixel specific terrain pressure. To improve detection of seasonal snow/ice scenes, we use the 4-km snow cover product from the Interactive Multi-sensor Snow and Ice Mapping System (IMS). Finally, we use an improved version of the vector linearized discrete ordinate radiative transfer (VLIDORT) for update of the top-of-atmosphere (TOA) radiance look-up-tables (LUTs). We demonstrate how the use of GLER is beneficial to TROPOMI’s high spatial resolution (up to 3.5 km x 3.5 km) measurements to monitor atmospheric trace gas pollutants down to the sub-city scale.
Document ID
20220014055
Acquisition Source
Goddard Space Flight Center
Document Type
Poster
Authors
Wenhan Qin
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Zachary Fasnacht
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Lok Lamsal
(Universities Space Research Association Columbia, Maryland, United States)
Joanna Joiner
(Goddard Space Flight Center Greenbelt, Maryland, United States)
Nickolay Krotkov
(Goddard Space Flight Center Greenbelt, Maryland, United States)
Bradford Fisher
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Alexander Vasilkov
(Science Systems and Applications (United States))
David Haffner
(Science Systems and Applications (United States) Lanham, Maryland, United States)
Robert Spurr
(RT Solutions, Cambridge, MA, USA)
Date Acquired
September 14, 2022
Subject Category
Geosciences (General)
Meeting Information
Meeting: Sentinel-5P Mission: 5 years anniversary
Location: Taormina, Sicily
Country: IT
Start Date: October 10, 2022
End Date: October 14, 2022
Sponsors: European Space Agency
Funding Number(s)
WBS: 953005.02.01.01.55
CONTRACT_GRANT: NNG17HP01C
CONTRACT_GRANT: NNG17HP01C
CONTRACT_GRANT: 80NSSC22M0001
CONTRACT_GRANT: NNG17HP01C
CONTRACT_GRANT: NNG17HP01C
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
Technical Review
Single Expert
Keywords
TROPOMI
OMI
GLER
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