Objectives
The National Institute for Environmental Studies has a network of UV monitoring stations consisting of 5 own stations and other cooperating institutes in Japan, and monitors harmful ultraviolet radiation continuously. However, UV radiation has a merit for vitamin D synthesis in human skin. Our group has developed a system to estimate the UV radiation necessary for vitamin D synthesis, as well as the amount of vitamin D synthesized in the body, and started to provide these data on the website.
What's New
- 2026-07-08
- Based on the evaluation of changes in instrument sensitivity at the Hateruma station, the graphs displaying preliminary values, climatological values, and historical data from 2014 onwards have been revised.
- 2025-01-22
- With the termination of UV observation at the Miyazaki station (Miyazaki prefecture), the provision of real time data at that station has ended. We will continue to provide the climatological data and data search for the past data at the Miyazaki station.
- 2024-06-26
- Provision of real time data at Miyazaki station has been suspended since June 21, 2024.
- 2023-11-15
- Provision of real time data of radiation and exposure time for Vitamin D Synthesis / Erythemal UV which was suspended due to technical reason has gradually restarted.
- 2023-10-13
- Provision of real time data of radiation and exposure time for Vitamin D Synthesis / Erythemal UV has been suspended due to technical reason.
- 2023-10-02
- Exposure Times for Vitamin D Synthesis / MED (Climatology) have been updated using data up to the end of August 2023.
- 2022-06-01
- Provision of real time data at Sapporo station which was suspended due to technical reason has restarted.
- 2022-04-27
- Provision of real time data at Osaka station which was suspended due to technical reason has restarted.
- 2022-03-16
- Provision of real time data at Sapporo station has been suspended due to technical reason.
- 2022-02-18
- Provision of real time data at Osaka station has been suspended due to technical reason.
- 2021-02-04
- Sendai station (Miyagi prefecture) has been added in the Information on Vitamin D Synthesis / Erythemal UV on our website.
- 2021-03-10
- Total amount of ozone to calculate Vitamin D Synthesis / Erythemal UV has been changed to use the climatological data for the Real Time Data, and to use the value of the day observed by satellites for 10 days before in the Data Search for Past Data. Consequently, error amounts have been greatly reduced.
- 2020-06-10
- Climatological data at the Aomori station (Aomori prefecture) and Osaka station (Osaka prefecture) have been released since the observation period at these stations exceeded two years.
- 2019-04-25
- With the termination of UV observation at the Cape Hedo station (Okinawa prefecture), the provision of real time data at that station has ended. We will continue to provide the climatological data and data search for the past data at the Cape Hedo station.
- 2018-10-19
- New stations have been added. Information of twelve stations are now on our website including mobile page.
- 2018-04-04
- Mobile page for information on Vitamin D Synthesis / Erythemal UV has been released. Enter the site from the left hand menu.
- 2017-12-01
- New information on Exposure Time for Vitamin D Synthesis / MED (Climatology) has been released on our website for 5 stations in Japan.
- 2016-06-24
- Two pages are available: Exposure Time for Vitamin D Synthesis / MED (Real Time Data), Data Search for Past Data.
- 2014-11-27
- Information on Vitamin D Synthesis / Erythemal UV was released on our website for 5 stations in Japan, i.e., Cape Ochi-ishi (Hokkaido) Rikubetsu (Hokkaido) Tsukuba (Ibaraki) Cape Hedo (Okinawa), and Hateruma (Okinawa).
Contact
