An assessment of the long-term drift in TOMS total ozone data, based on comparison with the Dobson network

Details An assessment of the long-term drift in TOMS total ozone data, based on comparison with the Dobson network An assessment of the long-term drift in TOMS total ozone data, based on comparison with the Dobson network

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988georl..15.1133f&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 15, Sept. 1988, p. 1133-1136.

Physics

9

Atmospheric Composition, Drift (Instrumentation), Ozonometry, Satellite-Borne Instruments, Total Ozone Mapping Spectrometer, Ground Stations, Long Term Effects, Nimbus 7 Satellite, Time Series Analysis

Scientific paper

Seven years of total ozone data derived from the TOMS instrument on Nimbus-7 are compared with results from 41 Dobson stations. In this study, a significant improvement in fit from previous studies is obtained using a model which assumes a change in the rate of drift between TOMS and Dobson around the middle of 1982. Results indicate that the TOMS measurements have drifted relative to the Dobson stations with a two-part linear trend of -0.25 + or - 0.17 percent per year during the period from launch to 6/30/82, and -0.51 + or - 0.21 percent per year during 7/1/82 - 10/31/85. The causes of this drift cannot be definitively separated between residual uncorrected drift in the TOMS instrument (a similar drift is apparent in the SBUV-Dobson comparisons), limited sensitivity of the TOMS to increases in tropospheric ozone, and the effect of local increases in pollution levels on individual Dobson stations.

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