HR: 0800h
AN: A21B-0845    [Abstracts]
TI: Transpacific transport induced inter-annual variability of CO, and related biomass burning molecules in the Free Troposphere over Poker Flat, Alaska
AU: * KASAI, Y J
EM: ykasai@nict.go.jp
AF: National Institute of Information and Communications Technology (NICT), 4-2-1, Nukui-Kitamachi, Koganei, Tokyo, 184-8795 Japan
AU: Kagawa, A
A21B-0845 AF: National Institute of Information and Communications Technology (NICT), 4-2-1, Nukui-Kitamachi, Koganei, Tokyo, 184-8795 Japan
AU: Kagawa, A
A21B-0845 AF: Fujitsu FIP Corporation, 2-45, Oume, Koto, Tokyo, 135-8686 Japan
AU: Jones, N B
A21B-0845 AF: Department of Chemistry, University of Wollongong, Wollongong, NSW, 2522 Australia
AU: Fujiwara, A
A21B-0845 AF: National Institute of Information and Communications Technology (NICT), 4-2-1, Nukui-Kitamachi, Koganei, Tokyo, 184-8795 Japan
AU: Fujiwara, A
A21B-0845 AF: Tokyo University of Science, Kagurazaka, Shinjyuku, Tokyo, 162-8601 Japan
AU: Seki, K
A21B-0845 AF: National Institute of Information and Communications Technology (NICT), 4-2-1, Nukui-Kitamachi, Koganei, Tokyo, 184-8795 Japan
AU: Murayama, Y
A21B-0845 AF: National Institute of Information and Communications Technology (NICT), 4-2-1, Nukui-Kitamachi, Koganei, Tokyo, 184-8795 Japan
AU: Murcray, F
A21B-0845 AF: Department Physics, University of Denver, 2199 S. University Blvd., Denver, CO 80208 United States
AB: Poker Flat is a good site to detect polluted air transported over a long distances because of its' relatively clean background tropospheric air and isolation from most local industrial activity. Except for occasional local burn-offs, there are no significant regional sources of pollution. Also, Poker Flat is the entrance for transpacific transport of air parcels going to Northern America from Eastern Siberia and Asia, and biomass burning affected air masses that have been transported from Siberia. The Siberian region holds one of the largest pools of terrestrial carbon. Siberia is also located where some of the largest temperature increases are expected to occur under current climate change scenarios. It is therefore interesting to understand the behavior and impact of polluted air due to Siberian fires on the Alaska region, where the background air is relatively clean. Tropospheric partial column abundances of CO, HCN, C2H2, and C2H6 have been retrieved from infrared solar spectra observed with a ground-based spectrometer at Poker Flat Alaska (65N, 147W) over the time period from 2000 to 2004. From these data we report the transpacific transport induced inter-annual variability of tropospheric CO over Poker Flat. The five year time-span of the data also show significant differences in year to year CO and HCN tropospheric column enhancements driven by changes in Siberian biomass-burning sources.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005