Anomalies in North American climate: the South Asian-tropical west Pacific connection
How do tropical heating fluctuations create North American climate anomalies? We propose some answers using the results from a simplified global atmospheric model. We find that the South Asian-tropical west Pacific area is especially effective at stimulating North American responses. The relatively strong tropical/extratropical interaction between these two areas is the result of two major processes acting on the Rossby wave signal induced by the tropical heating fluctuations. These factors are: 1) Wave guiding by the Asian-north Pacific subtropical jet; and 2) Wave amplification within unstable regions of the jet flank. These factors allow relatively small, remote, and short-term tropical fluctuations to have relatively large impacts on North American climate.
| Main Authors: | , , |
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| Format: | conference_item biblioteca |
| Language: | English |
| Published: |
1992
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| Subjects: | Atmospheric Sciences, PACLIM, |
| Online Access: | http://hdl.handle.net/1834/31482 |
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