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Solar Variability and Total Solar Irradiance (TSI)

Analyzing the Sun and its effects on climate is complicated by the fact that the amount of radiation arriving from the Sun is not constant. It varies from the average value of the total solar irradiance (TSI)--1,361 W/m2--on a daily basis. Variations in TSI are due to a balance between decreases caused by sunspots and increases caused by faculae, which are the bright areas that surround sunspots. The Sun's energy output varies with time, and Glory's TIM instrument will help measure those fluctuations by continued monitoring of TSI. Data from TIM will extend the long-term climate record, which has been uninterrupted since 1978 and provides the best estimate available of solar inputs to climate. This short movie displays the Sun rotating and the corresponding total solar irradiance.
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More information on this topic available at:
http://glory.gsfc.nasa.gov

These data are from October 2003 and display the largest recorded short-term decrease in TSI. Video courtesy of Laboratory for Atmospheric and Space Physics.    These data are from October 2003 and display the largest recorded short-term decrease in TSI. Video courtesy of Laboratory for Atmospheric and Space Physics.
Duration: 1.9 minutes
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Short URL to This Page:http://svs.gsfc.nasa.gov/goto?10396
Animation Number:10396
Completed:2009-02-19
Producer:Maria Frostic (UMBC)
Scientist:Greg Kopp (Laboratory for Atmospheric and Space Physics)
Goddard TV Tape:G2008-047 -- Glory Resource Reel
Please give credit for this item to:
Laboratory for Atmospheric and Space Physics.
 
Keywords:
SVS >> HDTV
SVS >> Solar Cycle
SVS >> Sun
GCMD >> Earth Science >> Sun-earth Interactions
GCMD >> Earth Science >> Atmosphere >> Atmospheric Radiation >> Solar Irradiance
GCMD >> Earth Science >> Sun-earth Interactions >> Solar Activity >> Solar Irradiance
SVS >> Glory
NASA Science >> Sun
 
 


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Many of our multimedia items use the GCMD keywords. These keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0

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