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Article: Magnitude and seasonality of wetland methane emissions from the Hudson Bay Lowlands (Canada)

TitleMagnitude and seasonality of wetland methane emissions from the Hudson Bay Lowlands (Canada)
Authors
Issue Date2011
Citation
Atmospheric Chemistry and Physics, 2011, v. 11, n. 8, p. 3773-3779 How to Cite?
AbstractThe Hudson Bay Lowlands (HBL) is the second largest boreal wetland ecosystem in the world and an important natural source of global atmospheric methane. We quantify the HBL methane emissions by using the GEOS-Chem chemical transport model to simulate aircraft measurements over the HBL from the ARCTAS and pre-HIPPO campaigns in May-July 2008, together with continuous 2004-2008 surface observations at Fraserdale (southern edge of HBL) and Alert (Arctic background). The difference in methane concentrations between Fraserdale and Alert is shown to be a good indicator of HBL emissions, and implies a sharp seasonal onset of emissions in late May (consistent with the aircraft data), a peak in July-August, and a seasonal shut-off in September. The model, in which seasonal variation of emission is mainly driven by surface temperature, reproduces well the observations in summer but its seasonal shoulders are too broad. We suggest that this reflects the suppression of emissions by snow cover and greatly improve the model simulation by accounting for this effect. Our resulting best estimate for HBL methane emissions is 2.3 Tg a-1, several-fold higher than previous estimates (Roulet et al., 1994; Worthy et al., 2000). © 2011 Author(s).
Persistent Identifierhttp://hdl.handle.net/10722/268522
ISSN
2023 Impact Factor: 5.2
2023 SCImago Journal Rankings: 2.138
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorPickett-Heaps, C. A.-
dc.contributor.authorJacob, D. J.-
dc.contributor.authorWecht, K. J.-
dc.contributor.authorKort, E. A.-
dc.contributor.authorWofsy, S. C.-
dc.contributor.authorDiskin, G. S.-
dc.contributor.authorWorthy, D. E.J.-
dc.contributor.authorKaplan, J. O.-
dc.contributor.authorBey, I.-
dc.contributor.authorDrevet, J.-
dc.date.accessioned2019-03-25T07:59:54Z-
dc.date.available2019-03-25T07:59:54Z-
dc.date.issued2011-
dc.identifier.citationAtmospheric Chemistry and Physics, 2011, v. 11, n. 8, p. 3773-3779-
dc.identifier.issn1680-7316-
dc.identifier.urihttp://hdl.handle.net/10722/268522-
dc.description.abstractThe Hudson Bay Lowlands (HBL) is the second largest boreal wetland ecosystem in the world and an important natural source of global atmospheric methane. We quantify the HBL methane emissions by using the GEOS-Chem chemical transport model to simulate aircraft measurements over the HBL from the ARCTAS and pre-HIPPO campaigns in May-July 2008, together with continuous 2004-2008 surface observations at Fraserdale (southern edge of HBL) and Alert (Arctic background). The difference in methane concentrations between Fraserdale and Alert is shown to be a good indicator of HBL emissions, and implies a sharp seasonal onset of emissions in late May (consistent with the aircraft data), a peak in July-August, and a seasonal shut-off in September. The model, in which seasonal variation of emission is mainly driven by surface temperature, reproduces well the observations in summer but its seasonal shoulders are too broad. We suggest that this reflects the suppression of emissions by snow cover and greatly improve the model simulation by accounting for this effect. Our resulting best estimate for HBL methane emissions is 2.3 Tg a-1, several-fold higher than previous estimates (Roulet et al., 1994; Worthy et al., 2000). © 2011 Author(s).-
dc.languageeng-
dc.relation.ispartofAtmospheric Chemistry and Physics-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleMagnitude and seasonality of wetland methane emissions from the Hudson Bay Lowlands (Canada)-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.5194/acp-11-3773-2011-
dc.identifier.scopuseid_2-s2.0-79955504757-
dc.identifier.volume11-
dc.identifier.issue8-
dc.identifier.spage3773-
dc.identifier.epage3779-
dc.identifier.eissn1680-7324-
dc.identifier.isiWOS:000290014300014-
dc.identifier.issnl1680-7316-

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