Glyoxal vertical columns from GOME-2 backscattered light measurements and comparisons with a global model
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In this article, a two-step DOAS approach was used to calculate glyoxal vertical column densities from nadir backscattered radiances measured from 2007 to 2009 by the spaceborne GOME-2/METOP-A sensor.Abstract:
. Glyoxal vertical column densities have been retrieved from nadir backscattered radiances measured from 2007 to 2009 by the spaceborne GOME-2/METOP-A sensor. The retrieval algorithm is based on the DOAS technique and optimized settings have been used to determine glyoxal slant columns. The liquid water absorption is accounted for using a two-step DOAS approach, leading to a drastic improvement of the fit quality over remote clear water oceans. Air mass factors are calculated by means of look-up tables of weighting functions pre-calculated with the LIDORT v3.3 radiative transfer model and using a priori glyoxal vertical distributions provided by the IMAGESv2 chemical transport model. The total error estimate comprises random and systematic errors associated to the DOAS fit, the air mass factor calculation and the cloud correction. The highest glyoxal vertical column densities are mainly observed in continental tropical regions, while the mid-latitude columns strongly depend on the season with maximum values during warm months. An anthropogenic signature is also observed in highly populated regions of Asia. Comparisons with glyoxal columns simulated with IMAGESv2 in different regions of the world generally point to a missing glyoxal source, most probably of biogenic origin.read more
Citations
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Comparative Analysis of Atmospheric Glyoxal Column Densities Retrieved from MAX-DOAS Observations in Pakistan and during MAD-CAT Field Campaign in Mainz, Germany
TL;DR: In this article, a comparative analysis of the results of the MAD-CAT (Multi Axis DOAS-Comparison Campaign for Aerosols and Trace gases) was presented.
Journal ArticleDOI
Concentrations and Photochemistry of Acetaldehyde, Glyoxal, and Methylglyoxal in the Northwest Atlantic Ocean.
Yuting Zhu,David J. Kieber +1 more
TL;DR: The results suggest that acetaldehyde is likely supersaturated in surface seawater relative to its typical atmospheric concentrations, whereas glyoxal and methylglyoxal are significantly undersaturated.
Investigating the role of glyoxal using satellite and MAX-DOAS measurements
TL;DR: In this paper, an improved retrieval for glyoxal from OMI measurements is presented, where two different approaches to reduce the interference of liquid water absorption over oceanic regions are evaluated, achieving a significant reduction of negative columns over clear water regions.
Posted ContentDOI
Glyoxal tropospheric column retrievals from TROPOMI, multi-satellite intercomparison and ground-based validation
Christophe Lerot,François Hendrick,Michel Van Roozendael,Leonardo M. A. Alvarado,Andreas Richter,Isabelle De Smedt,Nicolas Theys,Jonas Vlietinck,Huan Yu,Jeroen van Gent,Trissevgeni Stavrakou,Jean-François Müller,Pieter Valks,Diego Loyola,Hitoshi Irie,Vinod Kumar,Thomas Wagner,Stefan F. Schreier,Vinayak Sinha,Ting Wang,Pucai Wang,Christian Retscher +21 more
TL;DR: In this paper, the first global glyoxal (CHOCHOCHO) tropospheric column product derived from the TROPOspheric Monitoring Instrument (TROPOMI) on board of the Sentinel-5 Precursor satellite is presented.
Unexpected long-range transport of glyoxal and formaldehyde observed from the Copernicus Sentinel-5 Precursor satellite during the 2018 Canadian wildfires
Leonardo M. A. Alvarado,Mihalis Vrekoussis,Andreas Richter,Andreas Hilboll,A. B. Kalisz Hedegaard,Oliver Schneising,John P. Burrows +6 more
TL;DR: In this article, the authors used the DOAS method to detect the presence of volatile organic compounds (VOCs) and formaldehyde (HCHO) in the atmosphere during a fire season in British Columbia Canada.
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