Methane emissions on large scales
Two separate studies have been undertaken to improve estimates of methane emissions on a landscape scale. The first study took place over a palsa mire in northern Finland in August 1995. A tethered balloon and a tunable diode laser were used to measure profiles of methane in the nocturnal boundary l...
Published in: | Atmospheric Environment |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
1998
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/3842/ https://doi.org/10.1016/S1352-2310(98)00080-6 |
id |
ftnerc:oai:nora.nerc.ac.uk:3842 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:3842 2024-06-09T07:48:33+00:00 Methane emissions on large scales Beswick, K. M. Simpson, T. W. Fowler, D. Choularton, T. W. Gallagher, M. W. Hargreaves, K. J. Sutton, M. A. Kaye, A. 1998-10 http://nora.nerc.ac.uk/id/eprint/3842/ https://doi.org/10.1016/S1352-2310(98)00080-6 unknown Elsevier Beswick, K. M.; Simpson, T. W.; Fowler, D.; Choularton, T. W.; Gallagher, M. W.; Hargreaves, K. J.; Sutton, M. A. orcid:0000-0002-6263-6341 Kaye, A. 1998 Methane emissions on large scales. Atmospheric Environment, 32 (19). 3283-3291. https://doi.org/10.1016/S1352-2310(98)00080-6 <https://doi.org/10.1016/S1352-2310(98)00080-6> Atmospheric Sciences Publication - Article PeerReviewed 1998 ftnerc https://doi.org/10.1016/S1352-2310(98)00080-6 2024-05-15T08:46:53Z Two separate studies have been undertaken to improve estimates of methane emissions on a landscape scale. The first study took place over a palsa mire in northern Finland in August 1995. A tethered balloon and a tunable diode laser were used to measure profiles of methane in the nocturnal boundary layer. Using a simple box method or the flux gradient technique fluxes ranging from 18.5 to 658 μmol m−2 h−1 were calculated. The large fluxes may be caused by advection of methane pockets across the measurement site, reflecting the heterogeneous nature of methane source strengths in the surrounding area. Under suitable conditions, comparison with nearby ground-based eddy-correlation results suggested that the balloon techniques could successfully measure fluxes on field scales. The second study was carried out by the NERC Scientific Services Atmospheric Research Airborne Support Facility using the Hercules C130 operated by the United Kingdom Meteorological Research Flight. A flight path around the northern coastline of Britain under steady West-East wind conditions enabled the measurement of methane concentrations up- and down-wind of northern Britain. Using a simple one-dimensional, constant-source diffusion model, the difference between the upwind and downwind concentrations was accounted for by methane emission from the surface. The contribution to methane emissions from livestock was also modelled. Modelled non-agricultural methane emissions decreased with increasing latitude with fluxes in northern England being a factor of 4 greater than those in northern Scotland. Since the only major methane source in northern Scotland was peat bogs, these results indicated that emissions over northern England were dominated by anthropogenic sources. Emissions from livestock accounted for 12% of the total flux over northern England, decreasing to 4% in southern Scotland and becoming negligible in northern Scotland. The total methane flux over northern Scotland was consistent with previous results from the area, indicating that ... Article in Journal/Newspaper Northern Finland palsa Natural Environment Research Council: NERC Open Research Archive Hercules ENVELOPE(161.450,161.450,-77.483,-77.483) Atmospheric Environment 32 19 3283 3291 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Atmospheric Sciences |
spellingShingle |
Atmospheric Sciences Beswick, K. M. Simpson, T. W. Fowler, D. Choularton, T. W. Gallagher, M. W. Hargreaves, K. J. Sutton, M. A. Kaye, A. Methane emissions on large scales |
topic_facet |
Atmospheric Sciences |
description |
Two separate studies have been undertaken to improve estimates of methane emissions on a landscape scale. The first study took place over a palsa mire in northern Finland in August 1995. A tethered balloon and a tunable diode laser were used to measure profiles of methane in the nocturnal boundary layer. Using a simple box method or the flux gradient technique fluxes ranging from 18.5 to 658 μmol m−2 h−1 were calculated. The large fluxes may be caused by advection of methane pockets across the measurement site, reflecting the heterogeneous nature of methane source strengths in the surrounding area. Under suitable conditions, comparison with nearby ground-based eddy-correlation results suggested that the balloon techniques could successfully measure fluxes on field scales. The second study was carried out by the NERC Scientific Services Atmospheric Research Airborne Support Facility using the Hercules C130 operated by the United Kingdom Meteorological Research Flight. A flight path around the northern coastline of Britain under steady West-East wind conditions enabled the measurement of methane concentrations up- and down-wind of northern Britain. Using a simple one-dimensional, constant-source diffusion model, the difference between the upwind and downwind concentrations was accounted for by methane emission from the surface. The contribution to methane emissions from livestock was also modelled. Modelled non-agricultural methane emissions decreased with increasing latitude with fluxes in northern England being a factor of 4 greater than those in northern Scotland. Since the only major methane source in northern Scotland was peat bogs, these results indicated that emissions over northern England were dominated by anthropogenic sources. Emissions from livestock accounted for 12% of the total flux over northern England, decreasing to 4% in southern Scotland and becoming negligible in northern Scotland. The total methane flux over northern Scotland was consistent with previous results from the area, indicating that ... |
format |
Article in Journal/Newspaper |
author |
Beswick, K. M. Simpson, T. W. Fowler, D. Choularton, T. W. Gallagher, M. W. Hargreaves, K. J. Sutton, M. A. Kaye, A. |
author_facet |
Beswick, K. M. Simpson, T. W. Fowler, D. Choularton, T. W. Gallagher, M. W. Hargreaves, K. J. Sutton, M. A. Kaye, A. |
author_sort |
Beswick, K. M. |
title |
Methane emissions on large scales |
title_short |
Methane emissions on large scales |
title_full |
Methane emissions on large scales |
title_fullStr |
Methane emissions on large scales |
title_full_unstemmed |
Methane emissions on large scales |
title_sort |
methane emissions on large scales |
publisher |
Elsevier |
publishDate |
1998 |
url |
http://nora.nerc.ac.uk/id/eprint/3842/ https://doi.org/10.1016/S1352-2310(98)00080-6 |
long_lat |
ENVELOPE(161.450,161.450,-77.483,-77.483) |
geographic |
Hercules |
geographic_facet |
Hercules |
genre |
Northern Finland palsa |
genre_facet |
Northern Finland palsa |
op_relation |
Beswick, K. M.; Simpson, T. W.; Fowler, D.; Choularton, T. W.; Gallagher, M. W.; Hargreaves, K. J.; Sutton, M. A. orcid:0000-0002-6263-6341 Kaye, A. 1998 Methane emissions on large scales. Atmospheric Environment, 32 (19). 3283-3291. https://doi.org/10.1016/S1352-2310(98)00080-6 <https://doi.org/10.1016/S1352-2310(98)00080-6> |
op_doi |
https://doi.org/10.1016/S1352-2310(98)00080-6 |
container_title |
Atmospheric Environment |
container_volume |
32 |
container_issue |
19 |
container_start_page |
3283 |
op_container_end_page |
3291 |
_version_ |
1801380312413896704 |