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Simulation of the Pinatubo aerosol cloud in general circulation modelThe global transport and dispersion of the Pinatubo aerosol cloud are simulated by means of a high-resolution stratospheric version of the NCAR Community Climate Model (CCM2) with an annual cycle. A passive tracer was injected into the model stratosphere over the Philippine Islands on June 15, and the transport was simulated for 180 d using an accurate semi-Lagrangian advection scheme. The simulated volcanic aerosol cloud initially drifted westward and expanded in longitude and latitude. The bulk of the aerosol cloud dispersed zonally to form a continuous belt in longitude, and remained confined to the tropics, centered near the 20-mb level for the entire 180-d model run, although a small amount was transported episodically into the upper troposphere in association with convective disturbances. Aerosol transported to the troposphere was dispersed within a few weeks into the Northern Hemisphere extratropics. In the Southern Hemisphere, the aerosol was mixed into the region equatorward of the core of the polar night jet during the first 50 d, but penetration into southern polar latitudes was delayed until the final warming in November.
Document ID
19920036892
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Boville, Byron A.
(NCAR Boulder, CO, United States)
Holton, James R.
(National Center for Atmospheric Research Boulder, CO, United States)
Mote, Philip W.
(Washington, University Seattle, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1991
Publication Information
Publication: Geophysical Research Letters
Volume: 18
ISSN: 0094-8276
Subject Category
Meteorology And Climatology
Accession Number
92A19516
Funding Number(s)
CONTRACT_GRANT: NAGW-662
CONTRACT_GRANT: NSF ATM-88-13971
CONTRACT_GRANT: NASA ORDER W-16215
Distribution Limits
Public
Copyright
Other

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