Mapping hydroxyl variability throughout the global remote troposphere via synthesis of airborne and satellite formaldehyde observations.
ATom
OMI
formaldehyde
hydroxyl
troposphere
Journal
Proceedings of the National Academy of Sciences of the United States of America
ISSN: 1091-6490
Titre abrégé: Proc Natl Acad Sci U S A
Pays: United States
ID NLM: 7505876
Informations de publication
Date de publication:
04 06 2019
04 06 2019
Historique:
pubmed:
22
5
2019
medline:
22
5
2019
entrez:
22
5
2019
Statut:
ppublish
Résumé
The hydroxyl radical (OH) fuels tropospheric ozone production and governs the lifetime of methane and many other gases. Existing methods to quantify global OH are limited to annual and global-to-hemispheric averages. Finer resolution is essential for isolating model deficiencies and building process-level understanding. In situ observations from the Atmospheric Tomography (ATom) mission demonstrate that remote tropospheric OH is tightly coupled to the production and loss of formaldehyde (HCHO), a major hydrocarbon oxidation product. Synthesis of this relationship with satellite-based HCHO retrievals and model-derived HCHO loss frequencies yields a map of total-column OH abundance throughout the remote troposphere (up to 70% of tropospheric mass) over the first two ATom missions (August 2016 and February 2017). This dataset offers unique insights on near-global oxidizing capacity. OH exhibits significant seasonality within individual hemispheres, but the domain mean concentration is nearly identical for both seasons (1.03 ± 0.25 × 10
Identifiants
pubmed: 31110019
pii: 1821661116
doi: 10.1073/pnas.1821661116
pmc: PMC6561255
doi:
Types de publication
Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
11171-11180Commentaires et corrections
Type : ErratumIn
Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
Références
Science. 2000 Apr 21;288(5465):500-3
pubmed: 10775106
Science. 2001 Jun 8;292(5523):1882-8
pubmed: 11337586
Science. 1995 Jul 14;269(5221):187-92
pubmed: 17789846
Science. 1987 Nov 13;238(4829):945-50
pubmed: 17829360
Ann Rev Mar Sci. 2009;1:19-42
pubmed: 21141028
Science. 2011 Jan 7;331(6013):67-9
pubmed: 21212353
Chem Soc Rev. 2012 Oct 7;41(19):6348-404
pubmed: 22907645
Nature. 2014 Sep 11;513(7517):219-23
pubmed: 25209800
Proc Natl Acad Sci U S A. 2017 May 23;114(21):5373-5377
pubmed: 28416657
Proc Natl Acad Sci U S A. 2017 May 23;114(21):5367-5372
pubmed: 28416668
J Geophys Res Atmos. 2017 Oct 27;122(20):11201-11226
pubmed: 29527424
Atmos Chem Phys. 2016;16(21):13477-13490
pubmed: 29619044
Proc Natl Acad Sci U S A. 2018 Sep 4;115(36):8931-8936
pubmed: 30127020