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Record 4 of 958
Sources of Tropospheric Ozone along the Asian Pacific Rim: An Analysis of Ozonesonde Observations
External Online Source: doi:10.1029/2001JD002005
Author and Affiliation:
Liu, Hong-Yu(Harvard Univ., Dept. of Earth and Planetary Sciences, Cambridge, MA, United States)
Jacob, Daniel J.(Harvard Univ., Dept. of Earth and Planetary Sciences, Cambridge, MA, United States)
Chan, Lo Yin(Hong Kong Polytechnic, Dept. of Civil and Structural Engineering, Hong Kong)
Oltmans, Samuel J.(National Oceanic and Atmospheric Administration, Climate Monitoring and Diagnostics Lab., Boulder, CO, United States)
Bey, Isabelle(Harvard Univ., Dept. of Earth and Planetary Sciences, Cambridge, MA, United States)
Yantosca, Robert M.(Harvard Univ., Dept. of Earth and Planetary Sciences, Cambridge, MA, United States)
Harris, Joyce M.(National Oceanic and Atmospheric Administration, Climate Monitoring and Diagnostics Lab., Boulder, CO, United States)
Duncan, Bryan N.(Harvard Univ., Dept. of Earth and Planetary Sciences, Cambridge, MA, United States)
Martin, Randall V.(Harvard Univ., Dept. of Earth and Planetary Sciences, Cambridge, MA, United States)
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 less than 32 deg.N in spring. Maximum European pollution influence (less than 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.
Publication Date: Jan 01, 2002
Document ID:
20040111407
(Acquired Sep 30, 2004)
Subject Category: ENVIRONMENT POLLUTION
Document Type: Journal Article
Publication Information: Journal of Geophysical Research (ISSN 0148-0227); Volume 107; No. D21; 3-1 - 3-16
Publisher Information: American Geophysical Union, United States
Contract/Grant/Task Num: NAG1-2307
Financial Sponsor: NASA Langley Research Center; Hampton, VA, United States
Hong Kong Polytechnic; Hong Kong
Organization Source: Harvard Univ.; Dept. of Earth and Planetary Sciences; Cambridge, MA, United States
Description: 24p; In English; Original contains color and black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: TROPOSPHERE; OZONE; POLLUTION TRANSPORT; THREE DIMENSIONAL MODELS; BIOMASS BURNING; ATMOSPHERIC COMPOSITION; ASIA; STRATOSPHERE; TEMPERATE REGIONS; TROPICAL REGIONS; CHEMICAL COMPOSITION; METEOROLOGICAL PARAMETERS
Availability Source: Other Sources
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