Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea

Jiyoung Kim, Jhoon Kim, Hi Ku Cho, Jay Herman, Sang Seo Park, Hyun Kwang Lim, Jae Hwan Kim, Koji Miyagawa, Yun Gon Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Daily total column ozone (TCO) measured using the Pandora spectrophotometer (no. 19) was compared with data from the Dobson (no. 124) and Brewer (no. 148) spectrophotometers, as well as from the Ozone Monitoring Instrument (OMI) (with two different algorithms, Total Ozone Mapping Spectrometer (TOMS) TOMS and differential optical absorption spectroscopy (DOAS) methods), over the 2-year period between March 2012 and March 2014 at Yonsei University, Seoul, Korea. Based on the linear-regression method, the TCO from Pandora is closely correlated with those from other instruments with regression coefficients (slopes) of 0.95 (Dobson), 1.00 (Brewer), 0.98 (OMI-TOMS), and 0.97 (OMI-DOAS), and determination coefficients (R2) of 0.95 (Dobson), 0.97 (Brewer), 0.96 (OMI-TOMS), and 0.95 (OMI-DOAS). The daily averaged TCO from Pandora has within 3ĝ€% differences compared to TCO values from other instruments. For the Dobson measurements in particular, the difference caused by the inconsistency in observation times when compared with the Pandora measurements was up to 12.5ĝ€% because of diurnal variations in the TCO values. However, the comparison with Brewer after matching the observation time shows agreement with large R2 and small biases. The TCO ratio between Brewer and Pandora shows the 0.98ĝ€±ĝ€0.03, and the distributions for relative differences between two instruments are 89.2 and 57.1ĝ€% of the total data within the error ranges of 3 and 5ĝ€%, respectively. The TCO ratio between Brewer and Pandora also is partially dependent on solar zenith angle. The error dependence by the observation geometry is essential to the further analysis focusing on the sensitivity of aerosol and the stray-light effect in the instruments.

Original languageEnglish
Pages (from-to)3661-3676
Number of pages16
JournalAtmospheric Measurement Techniques
Volume10
Issue number10
DOIs
Publication statusPublished - 2017 Oct 6

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ozone
monitoring
TOMS
atomic absorption spectroscopy
light effect
zenith angle
diurnal variation
aerosol
geometry

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Kim, Jiyoung ; Kim, Jhoon ; Cho, Hi Ku ; Herman, Jay ; Seo Park, Sang ; Kwang Lim, Hyun ; Kim, Jae Hwan ; Miyagawa, Koji ; Lee, Yun Gon. / Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea. In: Atmospheric Measurement Techniques. 2017 ; Vol. 10, No. 10. pp. 3661-3676.
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title = "Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea",
abstract = "Daily total column ozone (TCO) measured using the Pandora spectrophotometer (no. 19) was compared with data from the Dobson (no. 124) and Brewer (no. 148) spectrophotometers, as well as from the Ozone Monitoring Instrument (OMI) (with two different algorithms, Total Ozone Mapping Spectrometer (TOMS) TOMS and differential optical absorption spectroscopy (DOAS) methods), over the 2-year period between March 2012 and March 2014 at Yonsei University, Seoul, Korea. Based on the linear-regression method, the TCO from Pandora is closely correlated with those from other instruments with regression coefficients (slopes) of 0.95 (Dobson), 1.00 (Brewer), 0.98 (OMI-TOMS), and 0.97 (OMI-DOAS), and determination coefficients (R2) of 0.95 (Dobson), 0.97 (Brewer), 0.96 (OMI-TOMS), and 0.95 (OMI-DOAS). The daily averaged TCO from Pandora has within 3ĝ€{\%} differences compared to TCO values from other instruments. For the Dobson measurements in particular, the difference caused by the inconsistency in observation times when compared with the Pandora measurements was up to 12.5ĝ€{\%} because of diurnal variations in the TCO values. However, the comparison with Brewer after matching the observation time shows agreement with large R2 and small biases. The TCO ratio between Brewer and Pandora shows the 0.98ĝ€±ĝ€0.03, and the distributions for relative differences between two instruments are 89.2 and 57.1ĝ€{\%} of the total data within the error ranges of 3 and 5ĝ€{\%}, respectively. The TCO ratio between Brewer and Pandora also is partially dependent on solar zenith angle. The error dependence by the observation geometry is essential to the further analysis focusing on the sensitivity of aerosol and the stray-light effect in the instruments.",
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Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea. / Kim, Jiyoung; Kim, Jhoon; Cho, Hi Ku; Herman, Jay; Seo Park, Sang; Kwang Lim, Hyun; Kim, Jae Hwan; Miyagawa, Koji; Lee, Yun Gon.

In: Atmospheric Measurement Techniques, Vol. 10, No. 10, 06.10.2017, p. 3661-3676.

Research output: Contribution to journalArticle

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T1 - Intercomparison of total column ozone data from the Pandora spectrophotometer with Dobson, Brewer, and OMI measurements over Seoul, Korea

AU - Kim, Jiyoung

AU - Kim, Jhoon

AU - Cho, Hi Ku

AU - Herman, Jay

AU - Seo Park, Sang

AU - Kwang Lim, Hyun

AU - Kim, Jae Hwan

AU - Miyagawa, Koji

AU - Lee, Yun Gon

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