NASA Media Teleconference on Upcoming Climate, Ozone Expedition

June 20, 2007

Tabatha Thompson
Headquarters, Washington
202-358-3895

Jim Scott
University of Colorado, Boulder
303-492-3114

MEDIA ADVISORY: M07-68

NASA MEDIA TELECONFERENCE ON UPCOMING CLIMATE, OZONE EXPEDITION

WASHINGTON -- Scientists planning NASA's largest Earth science
expedition of the year will hold a media teleconference on Wednesday,
June 27, at 2 p.m. EDT to discuss the upcoming Tropical Composition,
Cloud and Climate Coupling (TC4) field campaign.

The TC4 study will tackle challenging questions about Earth's ozone
layer and climate using coordinated observations from satellites and
high-flying NASA airplanes. Researchers will study how chemical
compounds in the air are transported to the stratosphere, the area of
the atmosphere that contains most of Earth's ozone. They will
investigate how this vertical transport of water and chemicals
affects climate-influencing cirrus clouds, and the chemistry of the
upper atmosphere, of which ozone is an important component. The
campaign will be based out of San Jose, Costa Rica, starting in
mid-July.

Briefing participants are:

-- Michael Kurylo, TC4 program scientist, NASA Headquarters,
Washington
-- Hal Maring, TC4 program scientist, NASA Headquarters
-- David Starr, TC4 mission scientist, NASA Goddard Space Flight
Center, Greenbelt, Md.
-- Brian Toon, TC4 mission scientist, University of Colorado, Boulder

Media interested in participating in the teleconference should call
888 664-9853. The international toll number is 210 234-0004. The
passcode is "TC4." At the time of the teleconference, streaming audio
will be available at:

http://www.nasa.gov/newsaudio

Images and supporting data will be available during the teleconference
at:

http://www.nasa.gov/formedia

-end-

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