paluzzi@pioneer.arc.nasa.gov (Peter Paluzzi- ZeroOne) (01/06/90)
January Meeting and Technical Presentation
Santa Clara Valley Chapter
IEEE Geoscience and Remote Sensing Society
Ozone Holes
Dr. Brian Toon
NASA Ames Research Center
Thursday January 18, 1990
Dinner at 5:45 pm
Sundance Mine Company, 1921 El Camino, Palo Alto
Presentation at 7:30 pm
Stanford University, 450 Durand Building
(NOTE CHANGE IN LOCATION)
During the past decade springtime ozone amounts have
steadily declined over the Antarctic continent leading to
the formation of the "Ozone Hole." Over the northern hemi-
sphere a smaller, but still significant, high latitude
decline in ozone has occurred. The Thursday, January 18,
meeting of the Geoscience and Remote Sensing Society will
present Dr. Brian Toon discussing theories for the ozone
loss. The 1987 and 1989 aircraft expeditions to study Arc-
tic and Antarctic ozone will be described. The effect of
our continuing use of chlorine containing chemicals on ozone
levels over the next century will be outlined.
Dr. Toon is an associate fellow at NASA's Ames Research
Center, and is one of the originators of the nuclear winter
theory. He has investigated the factors causing the climate
of Mars to vary through time, the materials composing the
clouds of Venus, the effects of volcanic eruptions on the
terrestrial climate, and the environmental implication of
dust clouds caused by dinosaur killing asteroid impacts.
Recently Dr. Toon proposed that clouds of nitric acid
formed in the Antarctic stratosphere have contributed to the
development of the ozone hole. He served as deputy project
scientist for NASA's 1987 airborne Antarctic ozone project
which investigated the reasons for the formation of the
ozone hole. He was also the DC-8 flight scientist for the
1989 airborne Arctic stratospheric expedition that investi-
gated the processes of ozone loss in the northern hemi-
sphere. His presentation and theories on ozone loss are
based primarily on these two expeditions.
The meeting will be preceded by a dinner at the
Sundance Mine Company. NOTE THAT THE MEETING PLACE HAS BEEN
CHANGED FROM THAT GIVEN IN THE GRID. The meeting will be
held in the Durand Building at Stanford University. Enter
the Durand Building from the front main entrance as all oth-
ers will be locked.
Reservations for the dinner should be made with the
IEEE Council Office at (415) 327-6622
Peter Paluzzi, Sr. Graphics Analyst, Sterling Software, ZeroOne Group
Advanced Computing Facility, NASA/Ames Research Center, Mail Stop 233-3
Moffett Field, CA 94035
paluzzi@pioneer.arc.nasa.gov (415) 694-4589