Derivation of tropospheric column ozone from the Earth Probe TOMS/GOES co-located data sets using the cloud slicing technique

Details Derivation of tropospheric column ozone from the Earth Probe TOMS/GOES co-located data sets using the cloud slicing technique Derivation of tropospheric column ozone from the Earth Probe TOMS/GOES co-located data sets using the cloud slicing technique

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jastp..65.1127a&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 65, Issue 10, p. 1127-1137.

Physics

5

Tropospheric Ozone, Cloud Slicing, Earth Probe Toms, Goes

Scientific paper

A recently developed technique called cloud slicing used for deriving upper tropospheric ozone from the Nimbus 7 total ozone mapping spectrometer (TOMS) instrument combined with temperature-humidity and infrared radiometer (THIR) is not applicable to the Earth Probe TOMS (EP TOMS) because this satellite platform does not have an instrument to measure cloud-top temperatures. For continuing monitoring of tropospheric ozone between 200 and 500hPa and testing the feasibility of this technique across spacecrafts, EP TOMS data are co-located in time and space with the Geostationary Operational Environmental Satellite (GOES)-8 infrared data for year 2001 and early 2002, covering most of North and South America (45°S-45°N and 120°W-30°W). Results show that the maximum column amounts for the mid-latitudinal sites of the northern hemisphere are found in the March-May season. For the mid-latitudinal sites in the southern hemisphere, the highest column amounts are found in the September-November season with overall seasonal variability smaller than that in the northern hemisphere. The tropical sites show weaker seasonal variability compared to higher latitudes. The derived results for selected sites are cross-validated qualitatively with the seasonality of ozonesonde observations and the results from THIR analyses over the 1979-1984 time period. These comparisons show a reasonably good agreement among THIR, ozonesonde observations, and cloud slicing-derived column ozone. Cloud slicing measurements from TOMS coincide with large-scale convection events, especially in regions of the tropospheric wind jets (around +/-30° latitude). In these cases they may not be representative of typical conditions in the atmosphere. Two new variant approaches, high-low cloud slicing and ozone profile derivation from cloud slicing are introduced to estimate column ozone amounts using the entire cloud information in the troposphere. A future satellite platform such as the earth observing system (EOS) Aura with the ozone monitoring instrument (OMI) can provide better statistics of derived ozone because of improved spatial resolution and improved measurements of cloud-top pressures.

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