Comparison of stratospheric aerosol and gas experiment I (SAGE I) and Umkehr ozone profiles including a search for Umkehr aerosol effects

Thesis/Dissertation · Wed Jan 01 00:00:00 EST 1986

OSTI ID:5027918

Newchurch, M J

After briefly reviewing ozone depletion predictions from atmospheric models and results from trend analysis of Umkehr data, this paper outlines the Umkehr method for deducing the vertical profile of ozone and reviews the theoretical and empirical studies of the aerosol effect on Umkehr measurements. A brief description of the Stratospheric Aerosol and Gas Experiment I (SAGE I) is followed by a method for approximating the best representation of the conditions over the Umkehr ground site as seen by the SAGE I satellite. Using a spatially weighted average of SAGE I events derived from an autocorrelation analysis, the authors find 337 co-located SAGE I and Umkehr events. The approximate total column ozone measured by SAGE I is 5% higher than that measured by Umkehr on average. Most of this difference resides in Umkehr layer two, three, and four, while layers seven, eight, and nine contain small differences in average ozone content. Intercomparison with four other ozone studies indicates agreement between SAGE I and SBUV in most layers and at most Umkehr stations north of 30/sup 0/. However, significant differences in Umkehr layer eight between SAGE I and SBUV remain. Ozone differences between SAGE I and Umkehr are strong functions of both total column ozone and season in the lower layers but not in the upper layers.

• Research Organization: Georgia Inst. of Tech., Atlanta (USA)
• OSTI ID: 5027918
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
OZONE
AIR POLLUTION MONITORING
AEROSOLS
AIR POLLUTION
COMPARATIVE EVALUATIONS
ECOLOGICAL CONCENTRATION
REMOTE SENSING
SATELLITES
SEASONAL VARIATIONS
STRATOSPHERE
COLLOIDS
DISPERSIONS
EARTH ATMOSPHERE
POLLUTION
SOLS
VARIATIONS
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)