Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South Korea
The threshold exposure time for synthesis of vitamin D was simulated by using a radiative transfer model considering variations in total ozone, cloud, and surface conditions. The prediction of total ozone took the form of an empirical linear regression with the variables of meteorological parameters...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2019/4328151 |
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| _version_ | 1832562780664758272 |
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| author | Sang Seo Park Yun Gon Lee Migyoung Kim Jaemin Kim Ja-Ho Koo Chang Ki Kim Junshik Um Jongmin Yoon |
| author_facet | Sang Seo Park Yun Gon Lee Migyoung Kim Jaemin Kim Ja-Ho Koo Chang Ki Kim Junshik Um Jongmin Yoon |
| author_sort | Sang Seo Park |
| collection | DOAJ |
| description | The threshold exposure time for synthesis of vitamin D was simulated by using a radiative transfer model considering variations in total ozone, cloud, and surface conditions. The prediction of total ozone took the form of an empirical linear regression with the variables of meteorological parameters in the upper troposphere and lower stratosphere and the climatology value of total ozone. Additionally, to consider cloud extinction after the estimation of clear-sky UV radiation using a radiative transfer model simulation, a cloud modification factor was applied. The UV irradiance was estimated at one-hour intervals, and then, to improve the temporal resolution of the exposure time simulation, it was interpolated to a one-minute resolution. Exposure times from the simulation clearly followed seasonal and diurnal cycles. However, upon comparison with observations, biases with large variations were found, and the discrepancy in the exposure time between the observations and simulations was higher in low UV irradiance conditions. The large deviations in the prediction errors for total ozone and the simplified assumption for the cloud modification factor contributed to the large deviations in exposure time differences between the model estimation and observations. To improve the accuracy of the simulated exposure time, improved predictions of total ozone with a more detailed cloud treatment will be essential. |
| format | Article |
| id | doaj-art-fa7dc983c91f4c88a61d6a6ec295afa4 |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Meteorology |
| spelling | doaj-art-fa7dc983c91f4c88a61d6a6ec295afa42025-02-03T01:21:49ZengWileyAdvances in Meteorology1687-93091687-93172019-01-01201910.1155/2019/43281514328151Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South KoreaSang Seo Park0Yun Gon Lee1Migyoung Kim2Jaemin Kim3Ja-Ho Koo4Chang Ki Kim5Junshik Um6Jongmin Yoon7School of Earth and Environmental Sciences, Seoul National University, Seoul, Republic of KoreaDepartment of Atmospheric Sciences, Chungnam National University, Daejeon, Republic of KoreaDepartment of Atmospheric Sciences, Chungnam National University, Daejeon, Republic of KoreaDepartment of Atmospheric Sciences, Chungnam National University, Daejeon, Republic of KoreaDepartment of Atmospheric Sciences, Yonsei University, Seoul, Republic of KoreaNew and Renewable Energy Resource Center, Korea Institute of Energy Research, Daejeon, Republic of KoreaDepartment of Atmospheric Sciences, Pusan National University, Busan, Republic of KoreaNational Institute of Environmental Research, Incheon, Republic of KoreaThe threshold exposure time for synthesis of vitamin D was simulated by using a radiative transfer model considering variations in total ozone, cloud, and surface conditions. The prediction of total ozone took the form of an empirical linear regression with the variables of meteorological parameters in the upper troposphere and lower stratosphere and the climatology value of total ozone. Additionally, to consider cloud extinction after the estimation of clear-sky UV radiation using a radiative transfer model simulation, a cloud modification factor was applied. The UV irradiance was estimated at one-hour intervals, and then, to improve the temporal resolution of the exposure time simulation, it was interpolated to a one-minute resolution. Exposure times from the simulation clearly followed seasonal and diurnal cycles. However, upon comparison with observations, biases with large variations were found, and the discrepancy in the exposure time between the observations and simulations was higher in low UV irradiance conditions. The large deviations in the prediction errors for total ozone and the simplified assumption for the cloud modification factor contributed to the large deviations in exposure time differences between the model estimation and observations. To improve the accuracy of the simulated exposure time, improved predictions of total ozone with a more detailed cloud treatment will be essential.http://dx.doi.org/10.1155/2019/4328151 |
| spellingShingle | Sang Seo Park Yun Gon Lee Migyoung Kim Jaemin Kim Ja-Ho Koo Chang Ki Kim Junshik Um Jongmin Yoon Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South Korea Advances in Meteorology |
| title | Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South Korea |
| title_full | Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South Korea |
| title_fullStr | Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South Korea |
| title_full_unstemmed | Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South Korea |
| title_short | Simulation of Threshold UV Exposure Time for Vitamin D Synthesis in South Korea |
| title_sort | simulation of threshold uv exposure time for vitamin d synthesis in south korea |
| url | http://dx.doi.org/10.1155/2019/4328151 |
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