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Idealized SST anomaly regional climate model experiments : a note of caution

Auteur(s) et Affiliation(s)

WILLIAMS, C.J.R.
NCAS-Climate, Univ., Reading, Royaume-Uni
KNIVETON, D.R.
NCAS-Climate, Univ., Reading, Royaume-Uni
LAYBERRY, R.
NCAS-Climate, Univ., Reading, Royaume-Uni


Description :
The AA. present results from idealized regional climate model (RCM) experiments forced with both positive and negative SST anomalies in the southern Atlantic Ocean. They reveal an unexpected response of rainfall over southern Africa. In particular, it was found that SST anomalies of opposite sign can cause similar rainfall responses in the model experiments, with isolated increases in rainfall over central southern Africa as well as a large region of drying over the Mozambique Channel. The aim of this paper is to highlight this finding. It is suggested that the observed changes in rainfall might result from the redistribution of energy (associated with upper-level changes to Rossby waves) or, of more concern, model error, and therefore the paper concludes that the results of idealized regional climate models forced with SST anomalies should be viewed cautiously.


Type de document :
Article de périodique

Source :
Progress in physical geography, issn : 0309-1333, 2010, vol. 34, n°. 1, p. 59-74, nombre de pages : 16, Références bibliographiques : 2 p.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, London, Sage Publications

Langue :
Anglais
Droits :
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