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Comparison of Ozone Retrievals from the Pandora Spectrometer System and Dobson Spectrophotometer in Boulder, ColoradoA comparison of retrieved total column ozone (TCO) amounts between the Pandora #34 spectrometer system and the Dobson #061 spectrophotometer from direct-sun observations was performed on the roof of the Boulder, Colorado, NOAA building. This paper, part of an ongoing study, covers a 1-year period starting on 17 December 2013. Both the standard Dobson and Pandora TCO retrievals required a correction, TCO(sub corr) = TCO (1 + C(T)), using a monthly varying effective ozone temperature, T(sub E), derived from a temperature and ozone profile climatology. The correction is used to remove a seasonal difference caused by using a fixed temperature in each retrieval algorithm. The respective corrections C(T(sub E)) are C(sub Pandora) = 0.00333(T(sub E) - 225) and C(sub Dobson) = -0.0013(T(sub E) - 226.7) per degree K. After the applied corrections removed most of the seasonal retrieval dependence on ozone temperature, TCO agreement between the instruments was within 1% for clear-sky conditions. For clear-sky observations, both co-located instruments tracked the day-to-day variation in total column ozone amounts with a correlation of r(exp 2) = 0.97 and an average offset of 1.1 +/- 5.8 DU. In addition, the Pandora TCO data showed 0.3% annual average agreement with satellite overpass data from AURA/OMI (Ozone Monitoring Instrument) and 1% annual average offset with Suomi-NPP/OMPS (Suomi National Polar-orbiting Partnership, the nadir viewing portion of the Ozone Mapper Profiler Suite).
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Herman, J. (Maryland Univ. Baltimore County Baltimore, MD, United States)
Evans, R. (National Oceanic and Atmospheric Administration Boulder, CO, United States)
Cede, A. (Universities Space Research Association Greenbelt, MD, United States)
Abuhassan, N. (Maryland Univ. Baltimore County Baltimore, MD, United States)
Petropavlovskikh, I. (Colorado Univ. Boulder, CO, United States)
McConville, G. (Colorado Univ. Boulder, CO, United States)
Date Acquired
October 29, 2015
Publication Date
August 24, 2015
Publication Information
Publication: Atmospheric Measurement Techniques
Volume: 8
Subject Category
Instrumentation and Photography
Report/Patent Number
Funding Number(s)
Distribution Limits