A three-dimensional-model inversion of methyl chloroform to constrain the atmospheric oxidative capacity

Variations in the atmospheric oxidative capacity, largely determined by variations in the hydroxyl radical (OH), form a key uncertainty in many greenhouse and other pollutant budgets, such as that of methane (CH.sub.4). Methyl chloroform (MCF) is an often-adopted tracer to indirectly put observation...

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Bibliographic Details
Published in:	Atmospheric chemistry and physics Vol. 21; no. 6; pp. 4809 - 4824
Main Authors:	Naus, Stijn, Montzka, Stephen A, Patra, Prabir K, Krol, Maarten C
Format:	Journal Article
Language:	English
Published:	Katlenburg-Lindau Copernicus GmbH 29-03-2021 Copernicus Publications
Subjects:	Airborne observation Aircraft observations Analysis Annual variations Atmospheric models Atmospheric transport Atmospheric transport models Budgets Chloroform Computer applications Convergence Distribution Gases Gradients Hydroxyl radicals Identification Interannual variations Inversion Inversions Measurement techniques Methane Oceans Optimization techniques Oxidation Pollutants Simulation Three dimensional models Tracers Transport Tropical climate Variation
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Summary:	Variations in the atmospheric oxidative capacity, largely determined by variations in the hydroxyl radical (OH), form a key uncertainty in many greenhouse and other pollutant budgets, such as that of methane (CH.sub.4). Methyl chloroform (MCF) is an often-adopted tracer to indirectly put observational constraints on large-scale variations in OH. We investigated the budget of MCF in a 4DVAR inversion using the atmospheric transport model TM5, for the period 1998-2018, with the objective to derive information on large-scale, interannual variations in atmospheric OH concentrations.
ISSN:	1680-7324 1680-7316 1680-7324
DOI:	10.5194/acp-21-4809-2021