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Small Interannual Variability of Global Atmospheric Hydroxyl

Montzka, S. A. and Krol, M. and Dlugokencky, E. and Hall, B. and Jöckel, Patrick and Lelieveld, Jos (2011) Small Interannual Variability of Global Atmospheric Hydroxyl. Science, 133, pp. 67-69. DOI: 10.1126/science.1197640.

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Official URL: http://www.sciencemag.org/content/331/6013/67.short


The oxidizing capacity of the global atmosphere is largely determined by hydroxyl (OH) radicals and is diagnosed by analyzing methyl chloroform (CH3CCl3) measurements. Previously, large year-to-year changes in global mean OH concentrations have been inferred from such measurements, suggesting that the atmospheric oxidizing capacity is sensitive to perturbations by widespread air pollution and natural influences. We show how the interannual variability in OH has been more precisely estimated from CH3CCl3 measurements since 1998, when atmospheric gradients of CH3CCl3 had diminished as a result of the Montreal Protocol. We infer a small interannual OH variability as a result, indicating that global OH is generally well buffered against perturbations. This small variability is consistent with measurements of methane and other trace gases oxidized primarily by OH, as well as global photochemical model calculations.

Document Type:Article
Title:Small Interannual Variability of Global Atmospheric Hydroxyl
AuthorsInstitution or Email of Authors
Montzka, S. A.stephen.a.montzka@noaa.gov
Krol, M.Univ. of Utrecht, Utrecht, NL
Dlugokencky, E.NOAA Earth System Research Lab., Boulder, CO, USA
Hall, B.NOAA Earth System Research Lab., Boulder, CO, USA
Jöckel, PatrickPatrick.Joeckel@dlr.de
Lelieveld, JosJos.Lelieveld@mpic.de
Date:7 January 2011
Journal or Publication Title:Science
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 67-69
Keywords:oxidation capacity, atmospheric chemistry, hydroxyl radical, atmospheric modeling
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Patrick Jöckel
Deposited On:21 Nov 2011 10:50
Last Modified:07 Feb 2013 20:43

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