HR: 14:00h
AN: A43D-01    [Abstracts]
TI: The 1982 El Chichón Volcanic Eruption: A Review of the Aerosol Cloud Distribution and Observed Climatic Effects
AU: * Robock, A
EM: robock@envsci.rutgers.edu
AF: Rutgers University, Department of Environmental Sciences, 14 College Farm Road, New Brunswick, NJ 08901, United States
AB: The El Chichón volcano erupted on April 3 and 4, 1982, injecting about 7 Mt of SO₂ into the stratosphere. Satellite remote sensing using visible imagery showed that the cloud took three weeks to be transported around the world. Errors of longwave satellite retrievals of sea surface temperatures showed that the cloud stayed in the latitude band of 0-30°N throughout the summer. At the same time a large El Niño developed. By removing the El Niño signal from surface air temperature patterns, observations show winter warming of Northern Hemisphere continents in the 1982-1983 winter, a now well-understood enhancement of the positive phase of the Arctic Oscillation. Climate model simulations have not been able to show that the El Chichón eruption had any impact on the initiation or strength of the El Niño.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0370 Volcanic effects (8409)
DE: 1616 Climate variability (1635, 3305, 3309, 4215, 4513)
DE: 1640 Remote sensing (1855)
DE: 3337 Global climate models (1626, 4928)
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly