Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 400162
Title Small Interannual Variability of Global Atmospheric Hydroxyl
Author(s) Montzka, S.A.; Krol, M.C.; Dlugokencky, E.; Hall, B.; Jöckel, P.; Lelieveld, J.
Source Science 331 (2011)6013. - ISSN 0036-8075 - p. 67 - 69.
Department(s) Meteorology and Air Quality
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) methyl chloroform - carbon-monoxide - tropospheric oh - (co)-c-14 - chemistry - emissions - abundance - capacity - radicals - ozone
Abstract 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.
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