HR: 09:30h
AN: A21B-07    [PDF]
TI: Asian Outflow to the Pacific Observed During PEACE-B Aircraft Campaign in April-May 2002
AU: * Koike, M
EM: koike@eps.s.u-tokyo.ac.jp
AF: University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033 Japan
AU: Oshima, N
EM: oshima@aos.eps.s.u-tokyo.ac.jp
AF: University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033 Japan
AU: Nakamura, H
EM: hisashi@eps.s.u-tokyo.ac.jp
AF: University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033 Japan
AU: Kondo, Y
EM: kondo@atmos.rcast.u-tokyo.ac.jp
AF: Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8904 Japan
AU: Takegawa, N
EM: takegawa@atmos.rcast.u-tokyo.ac.jp
AF: Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8904 Japan
AU: Miyazaki, Y
EM: yuzom@atmos.rcast.u-tokyo.ac.jp
AF: Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo, 153-8904 Japan
AU: Kita, K
EM: kita@env.sci.ibaraki.ac.jp
AF: Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki, 310-8512 Japan
AU: Blake, D R
EM: dblake@orion.oac.uci.edu
AF: University of California, Irvine, Irvine, California, Irvine, CA 92697-2025 United States
AU: Shirai, T
EM: shirai@eorc.nasda.go.jp
AF: National Space Development Agency of Japan (NASDA), Earth Observation Research Center (EORC), Harumi Island Triton Square Office Tower X 23F, 1-8-10 Harumi, Chuo-ku, Tokyo, 104-6023 Japan
AU: Kawakami, S
EM: kawakami.shuuji@nasda.go.jp
AF: National Space Development Agency of Japan (NASDA), Earth Observation Research Center (EORC), Harumi Island Triton Square Office Tower X 23F, 1-8-10 Harumi, Chuo-ku, Tokyo, 104-6023 Japan
AU: Ogawa, T
EM: t_ogawa@eorc.nasda.go.jp
AF: National Space Development Agency of Japan (NASDA), Earth Observation Research Center (EORC), Harumi Island Triton Square Office Tower X 23F, 1-8-10 Harumi, Chuo-ku, Tokyo, 104-6023 Japan
AU: Watai, T
EM: watai.tomonori@nies.go.jp
AF: National Institute of Environmental Sudies, Onogawa 16-2, Tsukuba, Ibaraki, 305-8506 Japan
AB: Aircraft measurements of CO, NO, NO2, NOy, O3, and various other species were made during Pacific Exploration of Asian Continental Emission phase B (PEACE-B) conducted over the western Pacific in April-May 2002. Enhancements of CO up to 350 ppbv were observed at altitudes between 6 and 10 km over the southern part of Japan Sea on May 14. Back trajectories of sampled air masses suggest that some part of these air masses were uplifted over central China at latitudes around 30N one day prior to the encounter. High-altitude clouds were detected from the Geostationary Meteorological Satellite (GMS-5) in this region suggesting that convective transport of polluted air masses was responsible for these high CO values. Meteorological data analyses indicate that during PEACE-B warm moist air was frequently advected into this region at low altitudes from lower latitudes forming a frontal zone. In association with this unstable condition, cumulus convection that reached at altitudes higher than 500 hPa frequently appeared over this region. The sub-tropical jet was also located around 30N in this region and air masses uplifted by convection were efficiently transported to the Pacific by the jet. These mechanisms are considered to play important roles for venting polluted air masses in the boundary layer to the free troposphere over East Asia and rapid horizontal transport of uplifted air masses to the Pacific during PEACE-B. Chemical characteristics of air masses influenced by these processes are also presented and discussed.
UR: http://atmchem.eorc.nasda.go.jp/GLACE/PEACE/htdocs/index.html
DE: 0345 Pollution--urban and regional (0305)
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting