Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability
The findings of an extensive midsummer survey of CH4 emissions measurements representing the Alaska Arctic tundra are presented. Variability in rates of emissions was similar in magnitude on local and regional scales, ranging from 0 to 286.5 mg/sq m/d overall and often varying across two orders of m...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19930032545 2023-05-15T14:49:41+02:00 Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability Morrissey, L. A. Livingston, G. P. Unclassified, Unlimited, Publicly available Oct. 30, 1992 http://ntrs.nasa.gov/search.jsp?R=19930032545 unknown http://ntrs.nasa.gov/search.jsp?R=19930032545 Accession ID: 93A16542 Copyright Other Sources 46 Journal of Geophysical Research; 97; D15; p. 16,661-16,670. 1992 ftnasantrs 2012-02-15T19:59:09Z The findings of an extensive midsummer survey of CH4 emissions measurements representing the Alaska Arctic tundra are presented. Variability in rates of emissions was similar in magnitude on local and regional scales, ranging from 0 to 286.5 mg/sq m/d overall and often varying across two orders of magnitude within 0.5 m distances. Primary control on rates of emission was determined by the substrate and position of the water table relative to the surface. Emission rates in the Arctic Foothills ranged from 0.2 mg/sq m/d for tussock tundra to 55.53 mg/sq m/d over wet meadows. Plant-mediated release of CH4 to the atmosphere was directly proportional to green leaf area and represented 92-98 percent of the total emission rates over vegetated sites. The results suggest the current published emission rates may have overestimated the contribution of boreal ecosystems to the global CH4 budget by several fold. Other/Unknown Material Arctic Tundra Alaska NASA Technical Reports Server (NTRS) Arctic |
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NASA Technical Reports Server (NTRS) |
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46 |
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46 Morrissey, L. A. Livingston, G. P. Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability |
topic_facet |
46 |
description |
The findings of an extensive midsummer survey of CH4 emissions measurements representing the Alaska Arctic tundra are presented. Variability in rates of emissions was similar in magnitude on local and regional scales, ranging from 0 to 286.5 mg/sq m/d overall and often varying across two orders of magnitude within 0.5 m distances. Primary control on rates of emission was determined by the substrate and position of the water table relative to the surface. Emission rates in the Arctic Foothills ranged from 0.2 mg/sq m/d for tussock tundra to 55.53 mg/sq m/d over wet meadows. Plant-mediated release of CH4 to the atmosphere was directly proportional to green leaf area and represented 92-98 percent of the total emission rates over vegetated sites. The results suggest the current published emission rates may have overestimated the contribution of boreal ecosystems to the global CH4 budget by several fold. |
format |
Other/Unknown Material |
author |
Morrissey, L. A. Livingston, G. P. |
author_facet |
Morrissey, L. A. Livingston, G. P. |
author_sort |
Morrissey, L. A. |
title |
Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability |
title_short |
Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability |
title_full |
Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability |
title_fullStr |
Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability |
title_full_unstemmed |
Methane emissions from Alaska Arctic tundra - An assessment of local spatial variability |
title_sort |
methane emissions from alaska arctic tundra - an assessment of local spatial variability |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930032545 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Tundra Alaska |
genre_facet |
Arctic Tundra Alaska |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930032545 Accession ID: 93A16542 |
op_rights |
Copyright |
_version_ |
1766320766839685120 |