Methane emission rates from a northern wetland; response to temperature, water table and transport

MacDonald, J. A.; Fowler, D.; Hargreaves, K. J.; Skiba, U. ORCID: https://orcid.org/0000-0001-8659-6092; Leith, I.; Murray, M. B.. 1998 Methane emission rates from a northern wetland; response to temperature, water table and transport. Atmospheric Environment, 32 (19). 3219-3227. 10.1016/S1352-2310(97)00464-0

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Official URL: http://dx.doi.org/10.1016/S1352-2310(97)00464-0

Abstract/Summary

Static chamber measurements of CH4 flux were made from a range of micro-environments in an area of blanket bog in Northern Scotland. CH4 flux covered a wide range, the largest rate of CH4 emission, at 175.6 μmol m−2 h−1, was observed in pool areas through the vascular plant Menyanthes trifoliata. Investigations into the response of net CH4 emission rates to temperature and water table were carried out under semi-natural conditions on 45 large peat monoliths, maintained in open-top chambers, over a three-year period. The mean rate of CH4 emission at 10°C was an order of magnitude larger from pool monoliths (surface water table) at 78.0 μmol m−2 h−1, than from hummock monoliths (water table 15 cm below surface) at 8.4 μmol m−2 h−1. Rates of CH4 emission showed a positive linear response to increasing temperature from pool and lawn monoliths with activation energies of 74.3 and 79.5 kJ mol−1 and Q10 values of 3.0 and 3.3, respectively. When conditions of temperature, water table, light and humidity were controlled pool cores showed an exponential increase in CH4 emission rates between 5 and 30°C.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/S1352-2310(97)00464-0
Programmes:	CEH Programmes pre-2009 publications > Biogeochemistry
UKCEH and CEH Sections/Science Areas:	_ Biogeochemistry & Ecosystem Function
ISSN:	1352-2310
Additional Keywords:	Methanogenesis, vascular, oxidation, peat, stomata
NORA Subject Terms:	Ecology and Environment Atmospheric Sciences
Date made live:	08 Sep 2008 15:03 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/3827

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/S1352-2310(97)00464-0

Programmes:

CEH Programmes pre-2009 publications > Biogeochemistry

UKCEH and CEH Sections/Science Areas:

_ Biogeochemistry & Ecosystem Function

ISSN:

1352-2310

Additional Keywords:

Methanogenesis, vascular, oxidation, peat, stomata