Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Transport and chemistry of formaldehyde by mesoscale convective systems in West Africa during AMMA 2006
Journal of Geophysical Research Atmospheres, Volume 117, No. 12, Article D12301, Year 2012
Notification
URL copied to clipboard!
Description
In situ measurements of formaldehyde (CH
2
O) onboard four European research aircraft in August 2006 as part of the African Monsoon Multidisciplinary Analysis (AMMA) experiment in West Africa are used (1) to examine the redistribution of CH
2
O by mesoscale convective systems (MCS) in the tropical upper troposphere (UT), (2) to evaluate the scavenging efficiency (SE) of CH
2
O by MCS and (3) to quantify the impact of CH
2
O on UT photooxidant production downwind of MCS. The intercomparison of CH
2
O measurements is first tested, providing a unique and consistent 3-D-spatially resolved CH
2
O database in background and convective conditions. While carbon monoxide (CO) is vertically uplifted by deep convection up to 12 km, CH
2
O is also affected by cloud processing as seen from its ratio relative to CO with altitude. A new observation-based model is established to quantify the SE of CH
2
O. This model shows that convective entrainment of free tropospheric air cannot be neglected since it contributes to 40% of the convective UT air. For the 4 studied MCS, SE shows a large variability within a 4% to 39% range at a relative standard deviation of 30%, which is consistent with MCS features. A time-dependent photochemical box model is applied to convective UT air. After convection, 60% of CH
2
O is due to its photochemical production rather than to its direct transport. Model results indicate that CH
2
O directly injected by convection does not impact ozone and HOx production in the tropical UT of West Africa. NOx and anthropogenic hydrocarbon precursors dominate the secondary production of CH
2
O, ozone and HOx. © 2012 American Geophysical Union. All Rights Reserved.
Authors & Co-Authors
Borbon, Agnès
France, Creteil
Laboratoire Interuniversitaire Des Systèmes Atmosphériques Lisa - Umr 7583
Ruiz, M.
France, Creteil
Laboratoire Interuniversitaire Des Systèmes Atmosphériques Lisa - Umr 7583
Bechara, Joëlle
France, Creteil
Laboratoire Interuniversitaire Des Systèmes Atmosphériques Lisa - Umr 7583
Aumont, B.
France, Creteil
Laboratoire Interuniversitaire Des Systèmes Atmosphériques Lisa - Umr 7583
Chong, Michel
France, Toulouse
Université Fédérale Toulouse Midi-pyrénées
Huntrieser, H.
Germany, Koln
Deutsches Zentrum Für Luft- Und Raumfahrt Dlr
Mari, Céline H.
France, Toulouse
Université Fédérale Toulouse Midi-pyrénées
Reeves, Claire E.
United Kingdom, Norwich
University of East Anglia
Scialom, G.
France, Guyancourt
Laboratoire Atmosphères, Observations Spatiales
Hamburger, Thomas
Germany, Koln
Deutsches Zentrum Für Luft- Und Raumfahrt Dlr
Sweden, Stockholm
Stockholms Universitet
Stark, Harald J.
United States, Boulder
Noaa Earth System Research Laboratory
United States, Billerica
Aerodyne Research, Inc.
United States, Boulder
University of Colorado Boulder
Afif, Charbel
France, Creteil
Laboratoire Interuniversitaire Des Systèmes Atmosphériques Lisa - Umr 7583
Lebanon, Beirut
Université Saint-joseph de Beyrouth
Jambert, Corinne
France, Toulouse
Université Fédérale Toulouse Midi-pyrénées
Mills, Graham P.
United Kingdom, Norwich
University of East Anglia
Schlager, Hans
Germany, Koln
Deutsches Zentrum Für Luft- Und Raumfahrt Dlr
Perros, P. E.
France, Creteil
Laboratoire Interuniversitaire Des Systèmes Atmosphériques Lisa - Umr 7583
Statistics
Citations: 19
Authors: 16
Affiliations: 10
Identifiers
Doi:
10.1029/2011JD017121
ISSN:
01480227
Research Areas
Environmental
Study Approach
Quantitative
Study Locations
Multi-countries