Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh11a0377d&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SH11A-0377
Physics
1650 Solar Variability (7537), 7536 Solar Activity Cycle (2162), 7538 Solar Irradiance, 7549 Ultraviolet Emissions, 7594 Instruments And Techniques
Scientific paper
Solar ultraviolet (UV) irradiance is deposited in the atmosphere at altitudes ranging from the lower stratosphere to the lower thermosphere. Understanding the spectral and temporal dependence of solar UV variations is thus critical to characterizing the long-term terrestrial energy input over a wide vertical region. Regular spectral solar UV measurements from space began in late 1978 with the Nimbus-7 SBUV instrument, and have continued to the present using overlapping data sets from multiple instruments (SME, SBUV/2 on NOAA satellites, SUSIM and SOLSTICE on UARS). However, wavelength-dependent absolute biases and drifts are observed when any two data sets are compared. We are developing a composite spectral irradiance data set covering the wavelength range 120-400 nm for the period 1978-2004 as part of the Living With a Star Targeted Research and Technology program. We will describe the methods being used to evaluate and merge the individual data sets, and the status of the project. This work is being done in collaboration with the respective instrument scientists from each mission to ensure that the final product is accurate. The composite UV irradiance data set produced by this project will be extended into the future using data from the SOLSTICE and SIM instruments on the SORCE mission.
Cebula Richard P.
DeLand Matthew T.
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