Glyoxal vertical columns from GOME-2 backscattered light measurements and comparisons with a global model
TLDR
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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Glyoxal Retrieval from the Ozone Monitoring Instrument
TL;DR: In this paper, the authors present an algorithm for the retrieval of glyoxal from backscattered solar radiation, and apply it to spectra measured by the Ozone Monitoring Instrument (OMI).
Dissertation
Development and use of compact instruments for tropospheric investigations based on optical spectroscopy from mobile platforms
TL;DR: In this paper, the authors present the development of four different remote-sensing instruments dedicated to atmospheric research and their use in field campaigns between 2008 and 2012, installed on a scientific aircraft (Safire ATR-42), ultralight aircraft, and cars.
Journal ArticleDOI
Investigating missing sources of glyoxal over China using a regional air quality model (RAMS-CMAQ).
Jialin Li,Meigen Zhang,Guiqian Tang,Fangkun Wu,Leonardo M. A. Alvarado,Mihalis Vrekoussis,Mihalis Vrekoussis,Andreas Richter,John P. Burrows +8 more
TL;DR: Improvements to glyoxal VCDs were seen in high anthropogenic emissions regions, and improved concentrations agreed better with the measurements in regions of the lower reaches of the Yangtze River and Yellow River in January but not in July.
Ship-based detection of glyoxal over the remote tropical
TL;DR: In this paper, the authors presented the first detection of glyoxal (CHO-CHO) over the remote tropical Pacific Ocean in the Ma- rine Boundary Layer (MBL).
DissertationDOI
Measurements of reactive trace gases in the marine boundary layer using novel DOAS methods
TL;DR: In this article, shipborne measurements of BrO and IO were conducted in the MBL from 70°S to 90°N to obtain a global picture of their distribution over several years.
References
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