Comprehensive study of tropospheric ozone in the western Pacific Rim: Data analysis and 3-dimensional model simulation
The behavior of tropospheric ozone in the western Pacific Rim is studied utilizing satellite, surface, and sonde measurements along with numerical simulations with a three dimensional model. The results from this study show that a combination of transport, both vertical and horizontal, and photochemistry, near source regions and following range transport, determine the spatial and temporal distribution of tropospheric ozone in the western Pacific Rim. Surface level point measurements are mostly affected by local and regional meteorology, elevation, and proximity to source regions. The seasonal cycle exhibits a strong spring maximum, with higher values relative to the rest of the world, and a summer minimum, the latter being a result of regional meteorology specific to this area. Interactions with dust originating from the Chinese deserts may be causing perturbations in the ozone concentrations as they are mixed together during long range transport. These basic features of ozone behavior are being confirmed at a site in nearby Korea. Measurements of the tropospheric ozone column densities in the western Pacific Rim from satellite data have been analyzed. The column ozone has a broad spring-summer peak for East Asia with the highest values located within the latitude band of 30[approximately]40[degrees]N. Correlation studies show that the influence of photochemistry is most prominent in the summer. In the colder months, the regions above and below 35[degrees]N appear to be governed by a different combination of influencing factors. Validation studies with ozonesonde and surface ozone measurements generally show good agreement but the discrepancy for the summer season has yet to be completely resolved. Three-dimensional simulation results from a transport/chemistry/removal model show that the long range transport of ozone and its precursors have a significant impact on the ozone concentrations at remote locations far removed from source regions.
- Research Organization:
- Iowa Univ., Iowa City, IA (United States)
- OSTI ID:
- 7162728
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Description and evaluation of tropospheric chemistry and aerosols in the Community Earth System Model (CESM1.2)
Climatology of tropospheric ozone in southern Europe and its relation to potential vorticity