Surface Uv Radiation Monitoring Based on Gome and Sciamachy
نویسندگان
چکیده
Solar UV radiation reaching the Earth’s surface is monitored by means of two quantities: the clear-sky UV index at local solar noon and the daily UV dose. Each quantity is determined on the basis of two action spectra, describing wavelength dependent biological effects of UV radiation, namely erythema (sunburn) and DNA-damage. The quantities are derived from total ozone column measurements by the GOME and SCIAMACHY instruments, assimilated into global ozone fields. For GOME a data archive has been set up spanning the period August 1995 to May 2003. For SCIAMACHY a near-real time service is in operation, which provides a forecast of the erythemal UV index for today and a few days ahead, as well as yesterdays daily erythemal UV dose for Europe (based on METEOSAT cloud cover data). A data archive spanning the SCIAMACHY period will be set up. All data is available at the website of the TEMIS project via http://www.temis.nl/uvradiation/
منابع مشابه
Global satellite validation of SCIAMACHY O3 columns with GOME WFDOAS
Global stratospheric ozone columns derived from UV nadir spectra measured by SCIAMACHY (Scanning Imaging Spectrometer for Atmospheric Chartography; data ESA Versions 5.01 and 5.04) aboard the recently launched Environmental Satellite (ENVISAT) from January to June 2003 were compared to collocated total ozone data from GOME (Global Ozone Monitoring Experiment on ERS2) retrieved using the weighti...
متن کاملIn-orbit Optical Path Degradation: Gome Experience and Sciamachy Prediction
It is well known that degradation of optical components is to be expected after prolonged exposure to the conditions experienced in orbit. In particular it is expected that the instrument response to ultra-violet light will change. GOME and SCIAMACHY are prone to degradation. In order to minimise the impact on the scientific data products, several means of monitoring possible degradation were i...
متن کاملAbsolute Calibration and Degradation of Sciamachy/gome Reflectances
The goal of this study is to develop a method to quantify SCIAMACHY degradation and calibration in the UV, where the focus is on the O3 profile wavelength range 270-330 nm. Awaiting SCIAMACHY data reprocessing, the method has been performed on GOME observations, SCIAMACHY predecessor. The approach followed is to compare GOME reflectivity spectra with simulated spectra using collocated independe...
متن کاملSCIAMACHY tropospheric NO2 over Switzerland: estimates of NOx lifetimes and impact of the complex Alpine topography on the retrieval
This study evaluates NO2 vertical tropospheric column densities (VTCs) retrieved from measurements of the Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) above Switzerland and the Alpine region. The close correlation between pixel averaged NOx emission rates from a spatially and temporally highly resolved inventory and the NO2 VTCs under anticyclonic meteorolog...
متن کاملMonitoring Nitrogen Oxides with Satellite Instruments: High Resolution Maps from Gome Narrow Swath Mode and Sciamachy
The Global Ozone Monitoring Experiment (GOME) allows to retrieve tropospheric vertical column densities (TVCDs) of NO2. Mean maps of the global distribution of NO2 TVCDs reveal a clear fingerprint of anthropogenic sources due to fossil fuel combustion. However, GOME data suffer from the rather large footprint size of 320 km east-west, leading to a smearing out of the NO2 peaks in the retrieved ...
متن کامل