Gas-aerosol partitioning of ammonia in biomass burning plumes: Implications for the interpretation of spaceborne observations of ammonia and the radiative forcing of ammonium nitrate

Paulot, F.; Paynter, D.; Ginoux, P.; Naik, V.; Whitburn, S.; Van Damme, M.; Clarisse, L.; Coheur, P.‐F.; Horowitz, L. W.

doi:10.1002/2017gl074215

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Gas-aerosol partitioning of ammonia in biomass burning plumes: Implications for the interpretation of spaceborne observations of ammonia and the radiative forcing of ammonium nitrate

2017
By Paulot, F. ; Paynter, D. ; Ginoux, P. ; ...
Source: Geophysical Research Letters, 44(15), 8084-8093.

[PDF-1.60 MB]

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Journal Title:

Geophysical Research Letters
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Paulot, F. ; Paynter, D. ; Ginoux, P. ; Naik, V. ; Whitburn, S. ; ... More +

Paulot, F. ; Paynter, D. ; Ginoux, P. ; Naik, V. ; Whitburn, S. ; Van Damme, M. ; Clarisse, L. ; Coheur, P.‐F. ; Horowitz, L. W. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CICSP (Cooperative Institute for Climate Science) ; GFDL (Geophysical Fluid Dynamics Laboratory)

OAR (Oceanic and Atmospheric Research) ; CICSP (Cooperative Institute for Climate Science) ; GFDL (Geophysical Fluid Dynamics Laboratory) Less -
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Satellite-derived enhancement ratios of NH3 relative to CO column burden (ERNH3/CO) in fires over Alaska, the Amazon, and South Equatorial Africa are 35, 45, and 70% lower than the corresponding ratio of their emissions factors (EFNH3/CO) from biomass burning derived from in situ observations. Simulations performed using the Geophysical Fluid Dynamics Laboratory AM3 global chemistry-climate model show that these regional differences may not entirely stem from an overestimate of NH3 emissions but rather from changes in the gas-aerosol partitioning of NH3 to NH4+. Differences between ERNH3/CO and EFNH3/CO are largest in regions where EFNOx/NH3 is high, consistent with the production of NH4NO3. Biomass burning is estimated to contribute 11-23% of the global burden and direct radiative effect (DRE) of NH4NO3 (-15 to -28 mW m(-2)), despite accounting for less than 6% of the global source of NH3. Production of NH4NO3 is largely concentrated over the Amazon and South Equatorial Africa, where its DRE can reach -1.9Wm(-2) during the biomass burning season.
Source:

Geophysical Research Letters, 44(15), 8084-8093.
DOI:

https://doi.org/10.1002/2017gl074215
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Journal Article
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Grant no. NA14OAR4320106
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urn:sha256:6d31e1424fd283ccd970604644bbec2b7eed215bc152b7adbaae5c13aa99231b
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Gas-aerosol partitioning of ammonia in biomass burning plumes: Implications for the interpretation of spaceborne observations of ammonia and the radiative forcing of ammonium nitrate

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