Longterm Multi-Sensoral UV Record

Introduction

This service provides long-term records of surface UV data based on several satellite instruments. The general objectives of the "Longterm Multi-Sensoral UV Record" service are following:

• Provide information for monitoring of surface UV exposures
• Produce multisensoral, integrated global surface UV information
• Long-term coverage: early 1980s to present
• Serve as input for UV trend monitoring

Latest results

Example of the latest results:

Erythemal daily dose 27 June 2007	Vitamin D daily dose 27 June 2007	Daily maximum UV Index 27 June 2007

Archives

Phase 3

Phase 3 is the final stage of the Promote Project. In Phase 3 the UV Record has been processed for the pediod of July 1983 to June 2007. The UV products are based on ISCCP D1 cloud data and KNMI-assimilated ozone . The focus has been to produce the long-term global UV data using the algorithm developed in Phase 2. The results have been validated against ground-based UV data.

Three daily UV data sets have been processed at selected stations world wide and in a global grid with spacing of 1° x 1° in latitude/longitude:

• Erythemally weighted daily UV doses¹
• Vitamin D weighted daily UV doses²
• Daily maximum UV index³

Links to the full archive of the results:

• daily maps: UV maps main page
• site-specific time series for more than 100 locations: UV sites main page
• Validation results

Phase 1 and 2

The starting point for Phase 2 of PROMOTE was a set of individual UV monitoring services developed in Phase 1 of PROMOTE. These are the TEMIS UV radiation archive that provides UV records based on GOME, SCIAMACHY and MSG data; and UV Record service that provides UV records based on Nimbus-7 and Earth Probe TOMS instruments. The Phase 1 services provide daily maps and local time series of UV index and daily dose data. In Phase 2 the UV Record service will be upgraded to become an integrated service that provides global and homogeneous surface UV time-series.

In 2007 the primary goal was to ensure continuation of the UV time-series with surface UV data based on the OMI instrument. Future objective is to integrate the existing satellite-based surface UV time series into a longterm multi-sensoral UV record. The integrated service will be based on the PROMOTE total ozone record service and the International Cloud Climatology Project (ISCCP) cloud data. A prototype of the new integrated service will be available in 2008. The service will be completed in year 2009. Validation of the UV Record service will be based on utilization of ground-based spectral measurement data from the European UV Database (EUVDB) and UV time series obtained using reconstruction methods.

Phase 2: Prototype UV Record based on ISCCP clouds and KNMI-assimilated ozone: July 2002 - June 2005

• Daily UV maps
• Site-specific time series for more than 100 locations
• Description of methodology
• Validation results
• Publication⁴

Phase 1 products:

• UV radiation monitoring archive: http://www.temis.nl/uvradiation/UVarchive.html
• TOMS-based UV record archive: http://promote.fmi.fi/promote_fmi.html

Surface UV data based on Aura/OMI data:

• Online plotting of OMI surface UV data
• OMUVB overpass data are available for more than 100 surface UV monitoring sites from Aura Validation Data Center
• Documentation: OMUVB readme file and access to Level 2 data
• Publication⁵

Documentation

Validation

• Validation of the final Phase 3 products
• Validation of the Phase 2 products

Background information

Useful links:

• Ultraviolet radiation and the INTERSUN programme
• WMO UV radiation site
• The World Ozone and Ultraviolet Radiation Data Centre (WOUDC)
• European UV Database (EUVDB)
• COST-726: Long term changes and climatology of UV radiation over Europe
• FMI's UV index forecast

Contact details

Acknowledgements

Jussi Kaurola, last modification: 21 August 2009