Monthly Newsletter

July 2002

SORCE Science Working Group Meeting

The SOlar Radiation and Climate Experiment (SORCE) Science Working Group (SWG) Meeting was held July 17-19, 2002, in Steamboat Springs, Colorado. Thirty-five people from around the world participated in the two-and-one-half days of oral presentations and poster sessions. Scientists studying the Sun and Earth's atmosphere and climate came together to explore the variable Sun and its influence on the terrestrial environment.
Tom Woods, the science meeting program chair, began with a welcome and introduction to the SWG goals. By
focusing on three time domains,

SORCE Science Working Group Meeting attendees
the group worked to define the present understanding of solar and climate variations in three sessions as listed below. Each session combined invited and contributed presentations focusing on the solar phenomena and the climate phenomena. The group wanted to explore the most important time periods for variations in the Sun and Earth systems. A poster session was held on Thursday with eleven posters.

Session 1. Short-term (minutes to 2 years) solar variations and terrestrial variations.
Invited Speakers - Jesper Schou (Stanford University), Jeff Kuhn (University of Hawaii), Lon Hood (University of Arizona).
Contributed Talks - Tom Woods (LASP), Matt DeLand (Science Systems and Applications, Inc. [SSAI]).

Session 2. Medium-term (1-30 years) solar variations and terrestrial variations.
Invited Speakers - Claus Fröhlich (World Radiation Center, Switzerland), Oran White (HAO, NCAR), Robert Cahalan (NASA, GSFC).
Contributed Talks - Rashid Akmaev (CIRES, University of Colorado/NOAA), Matt DeLand (SSAI), Linton Floyd (NRL/Interferometrics Inc.), Judit Pap (GSFC, University of Maryland).

Session 3. Long-term (> 30 years) solar variations and terrestrial variations.
Invited Speakers - Jeffrey Hall (Lowell Observatory), Judith Lean (NRL), David Rind (Goddard Institute of Space Studies), Devendra Lal (Scripps Institute).
Contributed Talks - Matthew (Geoff) McHarg (U.S. Air Force Academy).

Before beginning the sessions, Gary Rottman provided an overview of the SORCE mission and updated everyone on the current status. He emphasized how important this research and data collection is for EOS science objectives. There is much to learn about the Earth's radiation and energy balance through continuous TSI measurements. Global energy balance considerations may not provide the entire story, and how TSI variations are distributed in wavelength is critically important in understanding the Earth's response to solar variations. He stressed that it must be a priority to continue monitoring the total and spectral solar irradiance after the SORCE mission is complete, and that we should now be planning for future measurement programs.

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