|
Read Full Article (file size: 2499815 bytes) Cited by
JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 107, NO. D21,
4573,
doi:10.1029/2001JD002005,
2002
Sources of tropospheric ozone along the Asian Pacific Rim: An analysis of ozonesonde observations
Hongyu Liu
Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences,
Harvard University,
Cambridge,
Massachusetts,
USA
Daniel J. Jacob
Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences,
Harvard University,
Cambridge,
Massachusetts,
USA
Lo Yin Chan
Department of Civil and Structural Engineering,
Hong Kong Polytechnic University,
Hong Kong,
People's Republic of China
Samuel J. Oltmans
Climate Monitoring and Diagnostics Laboratory,
NOAA,
Boulder,
Colorado,
USA
Isabelle Bey
Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences,
Harvard University,
Cambridge,
Massachusetts,
USA
Robert M. Yantosca
Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences,
Harvard University,
Cambridge,
Massachusetts,
USA
Joyce M. Harris
Climate Monitoring and Diagnostics Laboratory,
NOAA,
Boulder,
Colorado,
USA
Bryan N. Duncan
Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences,
Harvard University,
Cambridge,
Massachusetts,
USA
Randall V. Martin
Department of Earth and Planetary Sciences and Division of Engineering and Applied Sciences,
Harvard University,
Cambridge,
Massachusetts,
USA
Abstract
The sources contributing to tropospheric ozone over the Asian Pacific Rim in different seasons are quantified by analysis
of Hong Kong and Japanese ozonesonde observations with a global three-dimensional (3-D) chemical transport model (GEOS-CHEM)
driven by assimilated meteorological observations. Particular focus is placed on the extensive observations available from
Hong Kong in 1996. In the middle-upper troposphere (MT-UT), maximum Asian pollution influence along the Pacific Rim occurs
in summer, reflecting rapid convective transport of surface pollution. In the lower troposphere (LT) the season of maximum
Asian pollution influence shifts to summer at midlatitudes from fall at low latitudes due to monsoonal influence. The UT ozone
minimum and high variability observed over Hong Kong in winter reflects frequent tropical intrusions alternating with stratospheric
intrusions. Asian biomass burning makes a major contribution to ozone at <32°N in spring. Maximum European pollution influence
(<5 ppbv) occurs in spring in the LT. North American pollution influence exceeds European influence in the UT-MT, reflecting
the uplift from convection and the warm conveyor belts over the eastern seaboard of North America. African outflow makes a
major contribution to ozone in the low-latitude MT-UT over the Pacific Rim during November–April. Lightning influence over
the Pacific Rim is minimum in summer due to westward UT transport at low latitudes associated with the Tibetan anticyclone.
The Asian outflow flux of ozone to the Pacific is maximum in spring and fall and includes a major contribution from Asian
anthropogenic sources year-round.
Published 8
November
2002.
Index Terms: 0322 Atmospheric Composition and Structure: Constituent sources and sinks; 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry; 0399 Atmospheric Composition and Structure: General or miscellaneous; 0365 Atmospheric Composition and Structure: Troposphere—composition and chemistry.
Read Full Article (file size: 2499815 bytes) Cited by
Citation: Liu, H., D. J. Jacob, L. Y. Chan, S. J. Oltmans, I. Bey, R. M. Yantosca, J. M. Harris, B. N. Duncan, and R. V. Martin
(2002),
Sources of tropospheric ozone along the Asian Pacific Rim: An analysis of ozonesonde observations,
J. Geophys. Res.,
107(D21),
4573,
doi:10.1029/2001JD002005.
Copyright 2002 by the American Geophysical Union.
|