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Formaldehyde in the...
Formaldehyde in the Tropical Western Pacific: Chemical Sources and Sinks, Convective Transport, and Representation in CAM-Chem and the CCMI Models
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Anderson, D. C. (author)
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Nicely, J. M. (author)
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Wolfe, G. M. (author)
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show more...
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Hanisco, T. F. (author)
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Salawitch, R. J. (author)
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Canty, T. P. (author)
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Dickerson, R. R. (author)
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Apel, E. C. (author)
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Baidar, S. (author)
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Bannan, T. J. (author)
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Blake, N. J. (author)
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Chen, D. X. (author)
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Dix, B. (author)
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Fernandez, R. P. (author)
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Hall, S. R. (author)
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Hornbrook, R. S. (author)
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Huey, L. G. (author)
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Josse, B. (author)
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Jockel, P. (author)
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Kinnison, D. E. (author)
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Koenig, T. K. (author)
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- Le Breton, Michael, 1986 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology
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Marecal, V. (author)
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Morgenstern, O. (author)
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Oman, L. D. (author)
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Pan, L. L. (author)
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Percival, C. (author)
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Plummer, D. (author)
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Revell, L. E. (author)
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Rozanov, E. (author)
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Saiz-Lopez, A. (author)
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Stenke, A. (author)
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Sudo, K. (author)
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Tilmes, S. (author)
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Ullmann, K. (author)
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Volkamer, R. (author)
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Weinheimer, A. J. (author)
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Zeng, G. (author)
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(creator_code:org_t)
- 2017-10-26
- 2017
- English.
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In: Journal of Geophysical Research-Atmospheres. - : American Geophysical Union (AGU). - 2169-897X. ; 122:20, s. 11201-11226
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Abstract
Subject headings
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- Formaldehyde (HCHO) directly affects the atmospheric oxidative capacity through its effects on HOx. In remote marine environments, such as the tropical western Pacific (TWP), it is particularly important to understand the processes controlling the abundance of HCHO because model output from these regions is used to correct satellite retrievals of HCHO. Here we have used observations from the Convective Transport of Active Species in the Tropics (CONTRAST) field campaign, conducted during January and February 2014, to evaluate our understanding of the processes controlling the distribution of HCHO in the TWP as well as its representation in chemical transport/climate models. Observed HCHO mixing ratios varied from similar to 500 parts per trillion by volume (pptv) near the surface to similar to 75 pptv in the upper troposphere. Recent convective transport of near surface HCHO and its precursors, acetaldehyde and possibly methyl hydroperoxide, increased upper tropospheric HCHO mixing ratios by similar to 33% (22 pptv); this air contained roughly 60% less NO than more aged air. Output from the CAM-Chem chemistry transport model (2014 meteorology) as well as nine chemistry climate models from the Chemistry-Climate Model Initiative (free-running meteorology) are found to uniformly underestimate HCHO columns derived from in situ observations by between 4 and 50%. This underestimate of HCHO likely results from a near factor of two underestimate of NO in most models, which strongly suggests errors in NOx emissions inventories and/or in the model chemical mechanisms. Likewise, the lack of oceanic acetaldehyde emissions and potential errors in the model acetaldehyde chemistry lead to additional underestimates in modeled HCHO of up to 75 pptv (similar to 15%) in the lower troposphere.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Keyword
- volatile organic-compounds
- marine boundary-layer
- max-doas
- observations
- earth system model
- ground-based ftir
- mcm v3 part
- upper
- troposphere
- atmospheric chemistry
- oxidative capacity
- in-situ
- Meteorology & Atmospheric Sciences
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Anderson, D. C.
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Nicely, J. M.
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Wolfe, G. M.
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Hanisco, T. F.
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Salawitch, R. J.
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Canty, T. P.
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show more...
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Dickerson, R. R.
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Apel, E. C.
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Baidar, S.
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Bannan, T. J.
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Blake, N. J.
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Chen, D. X.
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Dix, B.
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Fernandez, R. P.
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Hall, S. R.
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Hornbrook, R. S.
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Huey, L. G.
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Josse, B.
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Jockel, P.
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Kinnison, D. E.
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Koenig, T. K.
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Le Breton, Micha ...
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Marecal, V.
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Morgenstern, O.
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Oman, L. D.
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Pan, L. L.
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Percival, C.
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Plummer, D.
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Revell, L. E.
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Rozanov, E.
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Saiz-Lopez, A.
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Stenke, A.
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Sudo, K.
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Tilmes, S.
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Ullmann, K.
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Volkamer, R.
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Weinheimer, A. J ...
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Zeng, G.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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Journal of Geoph ...
- By the university
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University of Gothenburg