For the first time, scientists have the tools and expertise to measure changes in global sea level and understand the mechanisms that contribute to those changes. Scientists from NASA, the National Oceanic and Atmospheric Administration (NOAA) and other respected climate research institutions will address factors that lead to sea level change at a NASA Science Update on Thursday, July 7 at 1 p.m. EDT.

The Update will be in the James E. Webb Auditorium at NASA Headquarters, 300 E Street, SW, Washington.

Panelists: — Dr. Waleed Abdalati, Head, Cryospheric Sciences Branch, NASA’s Goddard Space Flight Center, Greenbelt, Md.

— Dr. Steve Nerem, Associate Director, Colorado Center for Astrodynamics Research, University of Colorado, Boulder, Colo.

— Dr. Eric Rignot, research scientist for the Radar Science and Engineering Section, NASA’s Jet Propulsion Laboratory, Pasadena, Calif.

— Dr. Laury Miller, Chief, Satellite Altimetry Laboratory, NOAA, Washington

— Dr. Richard Alley, Evan Pugh Professor, Department of Geosciences and EMS Environment Institute, Pennsylvania State University, State College, Pa.

NASA TV will carry the conference live with question-and-answer capability from participating NASA centers. Media interested in asking questions via telephone during the briefing should call Tomeka Scales at 202/358-0781, by noon EDT, Wednesday, July 6 to receive the call-in number and password.

NASA TV is carried on the Web and on an MPEG-2 digital signal accessed via satellite AMC-6, at 72 degrees west longitude, transponder 17C, 4040 MHz, vertical polarization. It’s available in Alaska and Hawaii on AMC-7, at 137 degrees west longitude, transponder 18C, at 4060 MHz, horizontal polarization. A Digital Video Broadcast compliant Integrated Receiver Decoder is required for reception.

For NASA TV information and schedules on the Internet, visit:

http://www.nasa.gov/ntv

For more information about NASA and agency programs on the Internet, visit:

http://www.nasa.gov/home/index.html