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Estimation of total ozone column using UV spectrum data at Silpakorn University, Nakhon Pathom, Thailand |
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| รหัสดีโอไอ | |
| Title | Estimation of total ozone column using UV spectrum data at Silpakorn University, Nakhon Pathom, Thailand |
| Creator | 1. Kulanist Chiwpreecha 2. Sumaman Buntoung 3. Serm Janjai |
| Publisher | Joint Graduate School of Energy and Environment |
| Publication Year | 2557 |
| Keyword | Total ozone column, spectral UV, Libradtran, look up table |
| Abstract | In this study, total ozone column (TOC) in the atmosphere at Silpakorn University in Nakhon Pathom, Thailand (13.82 ? N, 100.04 ? E) was estimated. In the first step, the Libradtran radiative transfer model under cloudless condition was used to determine the ratio of UV irradiance at 320 nm to that of 305 nm (N value) and to generate a look-up table. The look-up table consists of N values and atmospheric parameters including aerosol properties, surface albedo and TOC. Then the N values from a spectroradiometer installed at Silpakorn University during a three-year period (2010 2012) were calculated. Finally, the comparison between N values from the LUT and N values from the spectroradiometer was carried out. The TOC which gave the closet N in the LUT was retreived. For the validation, the TOC from the LUT was compared with the TOC measured by a Dobson spectrophotometer at Thai Meteorological Department, Bangkok (13.40 ? N, 100.37 ? E). The result shows a good agreement between the two data sets with the root mean square difference (RMSD) and mean bias difference (MBD) of 3.8% and 1.6%, respectively. |
| ISBN | 978-616-92228-1-1 |
