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- Title
Tropical convective transport and the Walker circulation.
- Authors
Hosking, J. S.; Russo, M. R.; Braesicke, P.; Pyle, J. A.
- Abstract
We introduce a methodology to visualise rapid vertical and zonal tropical transport pathways. Using prescribed sea-surface temperatures in four monthly model integrations for 2005, preferred transport routes from the troposphere to the stratosphere are found in the model over the Maritime Continent (MC) in November and February, i.e., 5boreal winter. In these months, the ascending branch of the Walker Circulation over the MC is formed in conjunction with strong deep convection, allowing fast transport into the stratosphere. At the same time, the downwelling branch of the Walker Circulation is enhanced over the East Pacific, compared to other months in 2005, reducing locally the upward transport from emissions below. We conclude that the Walker circulation plays an important role in the seasonality of fast tropical transport from the troposphere to the stratosphere and so impacts at the same time the potential supply of surface emissions.
- Subjects
TROPICS; CONVECTION (Meteorology); ATMOSPHERIC transport; ATMOSPHERIC circulation; OCEAN temperature; ATMOSPHERIC models; STRATOSPHERE; EMISSIONS (Air pollution)
- Publication
Atmospheric Chemistry & Physics Discussions, 2012, Vol 12, Issue 5, p12229
- ISSN
1680-7367
- Publication type
Article
- DOI
10.5194/acpd-12-12229-2012