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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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doi:10.5194/amt-2016-146
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
14 Jul 2016
Review status
This discussion paper is under review for the journal Atmospheric Measurement Techniques (AMT).
Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea
Jiyoung Kim1, Jhoon Kim1, Hi-Ku Cho1, Jay Herman2, Sang Seo Park1,3, HyunKwang Lim1, Jae-hwan Kim4, and Koji Miyagawa5 1Department of Atmospheric Sciences, Yonsei University, Seoul South Korea
2Joint Center for Earth Systems and Technology, University of Maryland, Baltimore County, UMBC-JCET and NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
3Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan
4Department of Atmospheric Science, Pusan National University, Busan, Korea
5NOAA ESRL Global Monitoring Division 325 Broadway R/GMD, Boulder, CO, 80325- 3328 Earth System Research Laboratory, Boulder, Colorado, USA
Abstract. Daily total column ozone (TCO) measured using the Pandora spectrophotometer (#19) was intercompared with data from the Dobson (#124) and Brewer (#148) spectrophotometers, as well as from the Ozone Monitoring Instrument (OMI), over the 2-year period between March 2012 and March 2014 at Yonsei University, Seoul, Korea. The Pandora TCO measurements are closely correlated with those from the Dobson, Brewer, and OMI instruments with regression coefficients (slopes) of 0.95, 1.00, 0.98 (OMI-TOMS), and 0.97 (OMI-DOAS), respectively, and determination coefficients (R2) of 0.95, 0.97, 0.96 (OMI-TOMS), and 0.95 (OMI-DOAS), respectively. In particular, they show a close agreement with the Brewer TCO measurements, with slope and R2 values of 1.00 and 0.97, respectively. The difference between the Pandora and Dobson data can be explained by smaller amount of Dobson data available to calculate the daily averages, observation times, solar zenith angles, SO2 effect, temperature, and humidity between the two datasets. The difference in the results obtained from the Pandora instrument and Ozone Monitoring Instrument-Differential Optical Absorption Spectroscopy (OMI-DOAS algorithm) can be explained by the dependence on seasonal variations of about ± 2 % and solar zenith angle leading to overestimation by 5 % of OMI-DOAS measurements. For the Dobson measurements in particular, the difference caused by the inconsistency in observation times when compared with the Pandora measurements was up to 12.5 % on 22 June 2013 because of diurnal variations in the TCO values. However, despite these various differences and discrepancies, the daily TCO values measured by the four instruments during the 2-year study period are accurate and closely correlated.

Citation: Kim, J., Kim, J., Cho, H.-K., Herman, J., Park, S. S., Lim, H., Kim, J.-H., and Miyagawa, K.: Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea, Atmos. Meas. Tech. Discuss., doi:10.5194/amt-2016-146, in review, 2016.
Jiyoung Kim et al.
Jiyoung Kim et al.
Jiyoung Kim et al.

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Short summary
Total column ozone (TCO) has been obtained by various ground-based and spaceborne instruments with high accuracy. Here, daily TCO measured by Pandora spectrophotometer (#19) installed since (DRAGON)-NE Asia Campaign (2012) was intercompared using Dobson (#124), Brewer (#148) and OMI measurements from March 2012 to March 2014 at Yonsei University, Seoul, Korea. And the result showed that Pandora TCO is in highly good agreement with other measurements.
Total column ozone (TCO) has been obtained by various ground-based and spaceborne instruments...
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