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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-383
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Technical note
08 May 2017
Review status
This discussion paper is under review for the journal Atmospheric Chemistry and Physics (ACP).
The US Dobson Station Network Data Record Prior to 2015, Re-evaluation of NDACC and WOUDC archived records with WinDobson processing software
Robert D. Evans2, Irina Petropavlovskikh1, Audra McClure-Begley1, Glen McConville1, Dorothy Quincy2, and Koji Miyagawa3 1Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder 80309, USA
2Retired from NOAA/ESRL, Global Monitoring Division, Boulder, CO, 80305, USA
3Visitor with NOAA/ESRL, Global Monitoring Division, Bould er, CO, 80305, USA
Abstract. The United States government has operated Dobson Ozone Spectrophotometers at various sites, starting during the International Geophysical Year (July 1, 1957 to December 31, 1958). A network of stations for longterm monitoring of the total column content (thickness of the ozone layer) of the atmosphere was established in the early 1960s, and eventually grew to sixteen stations, fourteen of which are still operational and submit data to the United States of America’s National Oceanic and Atmospheric Administration (NOAA). Seven of these sites are also part of the Network for the Detection of Atmospheric Composition Change (NDACC), an organization that maintains its own data archive. Due to recent changes in data processing software the entire data set was reevaluated for possible changes. To evaluate and minimize potential changes caused by the new processing software, the reprocessed data record was compared to the original data record archived in the World Ozone and UV Data Center (WOUDC) in Toronto, Canada. The history of the observations at the individual stations, the instruments used for the NOAA network monitoring at the station, the method for reducing zenith sky observations to total ozone, and calibration procedures were re-evaluated using data quality control tools built into the new software. At the completion of the evaluation, the new data sets are to be published as an update to the WOUDC and NDACC archives, and the entire data set is to be made available to the scientific community. The procedure for reprocessing Dobson data and the results of the re-analysis on the archived record is presented in this paper. A summary of historical changes to fourteen station records is also provided.

Citation: Evans, R. D., Petropavlovskikh, I., McClure-Begley, A., McConville, G., Quincy, D., and Miyagawa, K.: The US Dobson Station Network Data Record Prior to 2015, Re-evaluation of NDACC and WOUDC archived records with WinDobson processing software, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-383, in review, 2017.
Robert D. Evans et al.
Robert D. Evans et al.
Robert D. Evans et al.

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Short summary
The record of the total ozone column (TOC) from stations using the Dobson Ozone spectrophotometer is one of the longest geophysical records in existence. Recent adoption of a new data processing scheme, with improved results prompted a re-processing of the historical record from these NOAA/NDACC Sites. As the original record of TOC from these stations are used for trend analysis and satellite verification, the scientific community should be aware of the changes in the new data set.
The record of the total ozone column (TOC) from stations using the Dobson Ozone...
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