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An ecosystem-scale perspective of the net land methanol flux: synthesis of micrometeorological flux measurements

Wohlfahrt, G ; Amelynck, C ; Ammann, C ; Arneth, A ; Bamberger, I ; Goldstein, A H ; Gu, L ; Guenther, A ; Hansel, A ; Heinesch, B ; Holst, T ; Hörtnagl, L ; Karl, T ; Laffineur, Q ; Neftel, A ; McKinney, K ; Munger, J W ; Pallardy, S G ; Schade, G W ; Seco, R ; Schoon, N

Atmospheric chemistry and physics, 2015-07, Vol.15 (2), p.2577-7427 [Periódico revisado por pares]

Germany: Copernicus GmbH

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Título:
An ecosystem-scale perspective of the net land methanol flux: synthesis of micrometeorological flux measurements
Autor: Wohlfahrt, G ; Amelynck, C ; Ammann, C ; Arneth, A ; Bamberger, I ; Goldstein, A H ; Gu, L ; Guenther, A ; Hansel, A ; Heinesch, B ; Holst, T ; Hörtnagl, L ; Karl, T ; Laffineur, Q ; Neftel, A ; McKinney, K ; Munger, J W ; Pallardy, S G ; Schade, G W ; Seco, R ; Schoon, N
Assuntos: Atmospheric chemistry ; Budgets ; Climate Research ; Deposition ; Earth and Related Environmental Sciences ; Earth sciences & physical geography ; Emission analysis ; Environmental aspects ; ENVIRONMENTAL SCIENCES ; Exchange ; Flux ; Geovetenskap och miljövetenskap ; Klimatforskning ; Land ; Methanol ; Methyl alcohol ; micrometeorological ; Natural Sciences ; Naturvetenskap ; Physical, chemical, mathematical & earth Sciences ; Physique, chimie, mathématiques & sciences de la terre ; Sciences de la terre & géographie physique ; Terrestrial ecosystems ; Troposphere ; VOC
É parte de: Atmospheric chemistry and physics, 2015-07, Vol.15 (2), p.2577-7427
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
scopus-id:2-s2.0-84945952481
P19849-B16; P23267-B16; L518-N20; AC05-00OR22725
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Descrição: Methanol is the second most abundant volatile organic compound in the troposphere and plays a significant role in atmospheric chemistry. While there is consensus about the dominant role of living plants as the major source and the reaction with OH as the major sink of methanol, global methanol budgets diverge considerably in terms of source/sink estimates reflecting uncertainties in the approaches used to model, and the empirical data used to separately constrain these terms. Here we compiled micrometeorological methanol flux data from eight different study sites and reviewed the corresponding literature in order to provide a first cross-site synthesis of the terrestrial ecosystem-scale methanol exchange and present an independent data-driven view of the land-atmosphere methanol exchange. Our study shows that the controls of plant growth on the production, and thus the methanol emission magnitude, and stomatal conductance on the hourly methanol emission variability, established at the leaf level, hold across sites at the ecosystem-level. Unequivocal evidence for bi-directional methanol exchange at the ecosystem scale is presented. Deposition, which at some sites even exceeds methanol emissions, represents an emerging feature of ecosystem-scale measurements and is likely related to environmental factors favouring the formation of surface wetness. Methanol may adsorb to or dissolve in this surface water and eventually be chemically or biologically removed from it. Management activities in agriculture and forestry are shown to increase local methanol emission by orders of magnitude; they are however neglected at present in global budgets. While contemporary net land methanol budgets are overall consistent with the grand mean of the micrometeorological methanol flux measurements, we caution that the present approach of simulating methanol emission and deposition separately is prone to opposing systematic errors and does not allow taking full advantage of the rich information content of micrometeorological flux measurements.
Editor: Germany: Copernicus GmbH
Idioma: Inglês

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An ecosystem-scale perspective of the net land methanol flux: synthesis of micrometeorological flux measurements

Wohlfahrt, G ; Amelynck, C ; Ammann, C ; Arneth, A ; Bamberger, I ; Goldstein, A H ; Gu, L ; Guenther, A ; Hansel, A ; Heinesch, B ; Holst, T ; Hörtnagl, L ; Karl, T ; Laffineur, Q ; Neftel, A ; McKinney, K ; Munger, J W ; Pallardy, S G ; Schade, G W ; Seco, R ; Schoon, N

Germany: Copernicus GmbH

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