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Satellite Observations of Solar Irradiance and Sun-Climate ImpactsSolar activity is now near its maximum, with events such as the 2001 "Bastille Day Event", a Coronal Mass Ejection which merited a full session at AGO'S annual meeting - and two major sunspot groupings earlier this year, with associated variations in TSI (Total Solar Irradiance). We discuss recent satellite measurements of TSI by ACRIM 2 and 3 And Virgo, and new precision observations of TSI and SSI (Solar Spectral Irradiance) expected from the SORCE mission, planned to launch in fall 2002. SSG has been added to TSI as a required EOS and NPOESS measurement because different spectral components provide energy inputs to different components of the climate system - UV into upper atmosphere and ozone, IR into lower atmosphere and clouds, and Visible into the biosphere. Succeeding satellite missions being planned for 2006 and 2010 will continue to monitor both TSI and SSI. We summarize current ideas about the potential impact of solar variability on Earth's climate on time scales from days to decades to centuries.
Document ID
20020079997
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Cahalan, R.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Lau, William K. M.
Date Acquired
August 20, 2013
Publication Date
January 1, 2002
Subject Category
Solar Physics
Meeting Information
Meeting: 2002 ARM Program Science Team Meeting
Location: Saint Petersburg, FL
Country: United States
Start Date: April 8, 2002
End Date: April 12, 2002
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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