HR: 0830h
AN: B31C-0310    [PDF]
TI: Potential enhancement of CH$_{4}$ emission in North Slope Wetlands of Alaska by Caribou
AU: * Kim, Y
EM: kimyw@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Dr.,, Fairbanks, AK 99775 United States
AU: Kushida, K
EM: kkushida@pop.lowtem.hokudai.ac.jp
AF: Institute of Low Temperature Science, Hokkaido University, N19 W8, Kita-Ku, Sapporo, 060-0819 Japan
AU: Griffith, B
EM: ffdbg@uaf.edu
AF: Institute of Arctic Biology, University of Alaska Fairbanks, 900 Koyukuk Dr.,, Fairbanks, AK 757000 United States
AU: Tanaka, N
EM: norit@iarc.uaf.edu
AF: International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Dr.,, Fairbanks, AK 99775 United States
AB: Methane (CH$_{4}$) emissions were measured just after two caribous traversed wetland sites of the North Slope of Alaska using a static chamber technique during the summer. The maximum value (308 mgCH$_{4}$-C/m$^{2}$/day) in wetlands was found as a result from the stimulated ebullition by caribou passage during seasonal post-calving migration. The estimated CH$_{4}$ emission by caribou disturbance ranged 8.0 to 15 x 10$^{9}$ gCH$_{4}$-C/season, which was almost comparable to the background CH4 emission range of 3.6 to 7.0 x 10$^{9}$ gCH$_{4}$-C/season. This finding suggests that enhancement of CH$_{4}$ emission due to disturbance of wetlands should not be overlooked for the better understanding of global CH$_{4}$ cycle.
DE: 0315 Biosphere/atmosphere interactions
DE: 0322 Constituent sources and sinks
DE: 0330 Geochemical cycles
DE: 0400 Biogeosciences
SC: Biogeosciences [B]
MN: 2003 Fall Meeting