Micrometeorological measurements of CH[sub 4] and CO[sub 2] exchange between the atmosphere and subarctic tundra

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/91JD02531· OSTI ID:7065763

Fan, S M; Wofsy, S C; Bakwin, P S; Jacob, D J; Anderson, S M; Kebabian, P L; Mcmanus, J B; Kolb, C E; Fitzjarrald, D R ^[1]

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1. Harvard Univ., Cambridge, MA (United States) Aerodyne Research, Inc., Center for Chemical and Environmental Physics, Billerica, MA (United States) New York State Univ., Albany (United States)

Eddy correlation flux measurements and concentration profiles of total hydrocarbons (THC) and CO[sub 2] were combined to provide a comprehensive record of atmosphere-biosphere exchange for these gases over a 30-day period in July-August 1988 in the Yukon-Kuskokwin River Delta of Alaska. Over 90 percent of net ecosystem exchanges of THC were due to methane. Lakes and wet meadow tundra provided the major sources of methane. The average fluxes from lake, dry tundra, and wet tundra were 11 +/- 3, 29 +/- 3, and 57 +/- 6 mg CH4/sq m/d, respectively. The mean remission rate for the site was 25 mg/sq m/d. Maximum uptake of CO[sub 2] by the tundra was 1.4 gC/sq m/d between 1000 and 1500 hrs, and nocturnal respiration averaged 0.73 gC/sq m/d. Net uptake of CO[sub 2] was 0.30 gC/sq m/d for the 30 days of measurement; methane flux accounted for 6 percent of CO2 net uptake. 53 refs.

• OSTI ID: 7065763
• Journal Information: Journal of Geophysical Research; (United States), Vol. 97; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ARCTIC REGIONS
MONITORING
EARTH ATMOSPHERE
HYDROCARBONS
TROPOSPHERE
ATMOSPHERIC CHEMISTRY
CARBON DIOXIDE
METHANE
TUNDRA
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLAR REGIONS
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)