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A trajectory-based estimate of the tropospheric ozone column using the residual method
- Source :
- Journal of Geophysical Research: Atmospheres, Journal of Geophysical Research: Atmospheres, 2007, 112 (24), pp.D24S49. ⟨10.1029/2007JD008773⟩, EPIC3Journal of Geophysical Research, 112, D24S49, Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2007, 112 (24), pp.D24S49. ⟨10.1029/2007JD008773⟩, ARCIMIS. Archivo Climatológico y Meteorológico Institucional (AEMET), Agencia Estatal de Meteorología (AEMET), Journal of Geophysical Research. D, Atmospheres, 112(24):D24S49, D24S49-1/21. Wiley-Blackwell
- Publication Year :
- 2007
- Publisher :
- HAL CCSD, 2007.
-
Abstract
- We estimate the tropospheric column ozone using a forward trajectory model to increase the horizontal resolution of the Aura Microwave Limb Sounder (MLS) derived stratospheric column ozone. Subtracting the MLS stratospheric column from Ozone Monitoring Instrument total column measurements gives the trajectory enhanced tropospheric ozone residual (TTOR). Because of different tropopause definitions, we validate the basic residual technique by computing the 200-hPa-to-surface column and comparing it to the same product from ozonesondes and Tropospheric Emission Spectrometer measurements. Comparisons show good agreement in the tropics and reasonable agreement at middle latitudes, but there is a persistent low bias in the TTOR that may be due to a slight high bias in MLS stratospheric column. With the improved stratospheric column resolution, we note a strong correlation of extratropical tropospheric ozone column anomalies with probable troposphere-stratosphere exchange events or folds. The folds can be identified by their colocation with strong horizontal tropopause gradients. TTOR anomalies due to folds may be mistaken for pollution events since folds often occur in the Atlantic and Pacific pollution corridors. We also compare the 200-hPa-to-surface column with Global Modeling Initiative chemical model estimates of the same quantity. While the tropical comparisons are good, we note that chemical model variations in 200-hPa-to-surface column at middle latitudes are much smaller than seen in the TTOR.
- Subjects :
- Atmospheric Science
Residual method
010504 meteorology & atmospheric sciences
Microwave Limb Sounder
Soil Science
010501 environmental sciences
Aquatic Science
Oceanography
Atmospheric sciences
01 natural sciences
Troposphere
chemistry.chemical_compound
Geochemistry and Petrology
Earth and Planetary Sciences (miscellaneous)
pollution
Tropospheric ozone
Stratosphere
0105 earth and related environmental sciences
Earth-Surface Processes
Water Science and Technology
Ozone Monitoring Instrument
tropospheric ozone
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
Ecology
Paleontology
Forestry
air quality
Geophysics
Tropospheric Emission Spectrometer
chemistry
13. Climate action
Space and Planetary Science
Climatology
Middle latitudes
Environmental science
Tropospheric column ozone
Tropopause
Subjects
Details
- Language :
- English
- ISSN :
- 2169897X and 21698996
- Database :
- OpenAIRE
- Journal :
- Journal of Geophysical Research: Atmospheres, Journal of Geophysical Research: Atmospheres, 2007, 112 (24), pp.D24S49. ⟨10.1029/2007JD008773⟩, EPIC3Journal of Geophysical Research, 112, D24S49, Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2007, 112 (24), pp.D24S49. ⟨10.1029/2007JD008773⟩, ARCIMIS. Archivo Climatológico y Meteorológico Institucional (AEMET), Agencia Estatal de Meteorología (AEMET), Journal of Geophysical Research. D, Atmospheres, 112(24):D24S49, D24S49-1/21. Wiley-Blackwell
- Accession number :
- edsair.doi.dedup.....ccb7764c239ea7ccafb5c41aa0cad7d1