An Assessment of SAGE II Version 6.1 Midlatitude Tropospheric Ozone Measurements Using Ozonesonde Data
Abstract
The focus of the present investigation is on the quality of the latest version (6.1) midlatitude tropospheric ozone data derived from the second Stratospheric Aerosol and Gas Experiment (SAGE II). To achieve this objective, the multiyear (1985-2000) observations from SAGE II are compared with ozonesonde measurements at two ground stations, one at Hohenpeissenberg (47.4N, 11E), Germany, and the other at Lauder (45S, 169.7E), New Zealand. The ozone data comparison searches the SAGE II data within a 1000-km radius and a 5-degree latitude of the ozonesonde profile measurements obtained in the same date. The SAGE II monthly mean ozone profile is then compared with the corresponding monthly mean of the ozonesonde. In general, the SAGE II and ozonesonde measurements exhibit similar ozone vertical distributions with the monthly mean profile differences within about 20%, down to an altitude of 10 km. In addition, the ozone profile from these two different types of instrument reveal similar seasonal variations featuring enhanced ozone concentration in the lower stratosphere and upper troposphere at midlatitudes during Spring. Furthermore, a study by using all available SAGE II data at latitudes near these ground stations shows that the monthly population distribution of ozone concentration at the tropopause resembles that determined from ozonesonde measurements, with an enhanced population of high values of ozone concentration during the Spring season.
- Publication:
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AGU Spring Meeting Abstracts
- Pub Date:
- May 2002
- Bibcode:
- 2002AGUSM.A42B..05T
- Keywords:
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- 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0394 Instruments and techniques;
- 0399 General or miscellaneous;
- 3360 Remote sensing;
- 3362 Stratosphere/troposphere interactions;
- 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0360 Transmission and scattering of radiation;
- 0365 Troposphere: composition and chemistry