The Mg Ii Solar Activity Proxy Indicator Derived from Gome and Sciamachy
نویسندگان
چکیده
The main purpose of the passive remote sensing instruments GOME and SCIAMACHY is to determine the amount and distribution of a large number of atmospheric trace constituents by measuring Earthshine radiance. In addition solar observations are performed on a regular time grid which offer the possibility to monitor solar variations. This paper summarises the derivation of a proxy solar activity indicator from GOME and SCIAMACHY solar irradiance measurements. This combined GOME/SCIAMACHY Mg II index is compared with the composite NOAA Mg II index (1978-present) showing an excellent correlation of 0.991. It is, therefore, well suited to be combined with these data to establish a long-term time series spanning almost three 11 year solar cycles.
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 کاملSurface Uv Radiation Monitoring Based on Gome and Sciamachy
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 t...
متن کاملSP-531 Envisat Validation Workshop
In order to assess the level-2 data retrieval accuracy of selected trace gases (O3, NO2, H2O) from SCIAMACHY and MIPAS, which are part of the atmospheric instrumentation on the recently launched ENVISAT satellite, operational and some scientific products are validated by comparison with other space borne instruments (GOME, HALOE, SAGE II, POAM III). First results of these satellite intercompari...
متن کاملPreliminary results of GOME-2 water vapour retrievals and first applications in polar regions
Global total water vapour columns have been derived from measurements of the Global Ozone Monitoring Experiment 2 (GOME-2) on MetOp. For this purpose, the Air Mass Corrected Differential Optical Absorption Spectroscopy (AMC-DOAS) method has been adapted, having previously been applied successfully to GOME (on ERS-2) and SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartog...
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 کامل