Simulation of threshold UV exposure time for Vitamin D synthesis in South Korea

Sang Seo Park, Yun Gon Lee, Migyoung Kim, Jaemin Kim, Ja Ho Koo, Chang Ki Kim, Junshik Um, Jongmin Yoon

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number4328151
JournalAdvances in Meteorology
Volume2019
DOIs
Publication statusPublished - 2019 Jan 1

Fingerprint

calciferol
South Korea
Vitamins
vitamin
total ozone
Ozone
ozone
thresholds
synthesis
simulation
Radiative transfer
irradiance
radiative transfer
Climatology
Light extinction
prediction
predictions
Upper atmosphere
Troposphere
deviation

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Pollution
  • Atmospheric Science

Cite this

Park, Sang Seo ; Lee, Yun Gon ; Kim, Migyoung ; Kim, Jaemin ; Koo, Ja Ho ; Kim, Chang Ki ; Um, Junshik ; Yoon, Jongmin. / Simulation of threshold UV exposure time for Vitamin D synthesis in South Korea. In: Advances in Meteorology. 2019 ; Vol. 2019.
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Simulation of threshold UV exposure time for Vitamin D synthesis in South Korea. / Park, Sang Seo; Lee, Yun Gon; Kim, Migyoung; Kim, Jaemin; Koo, Ja Ho; Kim, Chang Ki; Um, Junshik; Yoon, Jongmin.

In: Advances in Meteorology, Vol. 2019, 4328151, 01.01.2019.

Research output: Contribution to journalArticle

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