The DOI matches its Crossref record; 39 of the 39 references it cites were found in a registry or an index.
Detection and Attribution of Twentieth-Century Northern and Southern African Rainfall Change
Abstract
The spatial patterns, time history, and seasonality of African rainfall trends since 1950 are found to be deducible from the atmosphere’s response to the known variations of global sea surface temperatures (SSTs). The robustness of the oceanic impact is confirmed through the diagnosis of 80 separate 50-yr climate simulations across a suite of atmospheric general circulation models. Drying over the Sahel during boreal summer is shown to be a response to warming of the South Atlantic relative to North Atlantic SST, with the ensuing anomalous interhemispheric SST contrast favoring a more southern position of the Atlantic intertropical convergence zone. Southern African drying during austral summer is shown to be a response to Indian Ocean warming, with enhanced atmospheric convection over those warm waters driving subsidence drying over Africa. The ensemble of greenhouse-gas-forced experiments, conducted as part of the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, fails to simulate the pattern or amplitude of the twentieth-century African drying, indicating that the drought conditions were likely of natural origin. For the period 2000–49, the ensemble mean of the forced experiments yields a wet signal over the Sahel and a dry signal over southern Africa. These rainfall changes are physically consistent with a projected warming of the North Atlantic Ocean compared with the South Atlantic Ocean, and a further warming of the Indian Ocean. However, considerable spread exists among the individual members of the multimodel ensemble.
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Metadata
- Authors
- Hoerling, M., Hurrell, J., Eischeid, J., & Phillips, A.
- Venue
- Journal of Climate
- Publisher
- American Meteorological Society
- Published
- 2006-08-15
- Volume
- 19
- Issue
- 16
- Pages
- 3989-4008
- ISSN
- 0894-8755 (ISSN-L)
- 1520-0442
- OpenAlex
- W2141098380
- Cited by
- 469
- References
- 39
- FWCI
- 21.91
- Type
- journal article
- Language
- en
- Open access
- closed
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