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
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Substantial Underestimation of Post-Harvest Burning Emissions in the North China Plain Revealed by Multi-Species Space Observations.
Trissevgeni Stavrakou,Jean-François Müller,Maite Bauwens,I. De Smedt,Christophe Lerot,M. Van Roozendael,Pierre-François Coheur,Cathy Clerbaux,Cathy Clerbaux,K. F. Boersma,K. F. Boersma,Yuqin Song +11 more
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Measurements of diurnal variations and eddy covariance (EC) fluxes of glyoxal in the tropical marine boundary layer: description of the Fast LED-CE-DOAS instrument
Sean Coburn,Sean Coburn,Ivan Ortega,Ivan Ortega,Ryan Thalman,Ryan Thalman,Ryan Thalman,Byron Blomquist,Christopher W. Fairall,Rainer Volkamer,Rainer Volkamer +10 more
TL;DR: Fast LED-CE-DOAS is a multispectral sensor that selectively and simultaneously measures glyoxal (CHOCHO), nitrogen dioxide (NO2), oxygen dimers (O4), and water vapor (H2O) with 2 Hz time resolution as discussed by the authors.
Journal ArticleDOI
DOAS measurements of formaldehyde and glyoxal above a south-east Asian tropical rainforest
S. M. MacDonald,Hilke Oetjen,Hilke Oetjen,Anoop S. Mahajan,Anoop S. Mahajan,Lisa K. Whalley,Peter Edwards,Peter Edwards,Dwayne E. Heard,C. E. Jones,C. E. Jones,John M. C. Plane +11 more
TL;DR: In this paper, the long-path (LP) and multi-axis (MAX) differential optical absorption spectroscopy (DOAS) techniques were used to measure the diurnal evolution of formaldehyde and glyoxal throughout the boundary layer.
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Adjoint inversion of Chinese non-methane volatile organic compound emissions using space-based observations of formaldehyde and glyoxal
Hansen Cao,Tzung-May Fu,Lin Zhang,Daven K. Henze,C. Chan Miller,Christophe Lerot,G. Gonzalez Abad,Isabelle De Smedt,Qiang Zhang,Michel Van Roozendael,François Hendrick,Kelly Chance,Jie Li,Junyu Zheng,Yuanhong Zhao +14 more
TL;DR: This article used the GEOS-Chem model and its adjoint to quantify Chinese non-methane volatile organic compound (NMVOC) emissions for the year 2007, using the globe ozone monitoring experiment 2A (GOME-2A) instrument and the ozone monitoring instrument (OMI) as quantitative constraints.
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