The DOI matches its Crossref record; 22 of the 22 references it cites were found in a registry or an index.
Weakening of North Indian SST Gradients and the Monsoon Rainfall in India and the Sahel
Open accessAbstract
Sea surface temperatures (SSTs) in the equatorial Indian Ocean have warmed by about 0.6–0.8 K since the 1950s, accompanied by very little warming or even a slight cooling trend over the northern Indian Ocean (NIO). It is reported that this differential trend has resulted in a substantial weakening of the meridional SST gradient from the equatorial region to the South Asian coast during summer, to the extent that the gradient has nearly vanished recently. Based on simulations with the Community Climate Model Version 3 (CCM3), it is shown that the summertime weakening in the SST gradient weakens the monsoon circulation, resulting in less monsoon rainfall over India and excess rainfall in sub-Saharan Africa. The observed trend in SST is decomposed into a hypothetical uniform warming and a reduction in the meridional gradient. The uniform warming of the tropical Indian Ocean in the authors’ simulations increases the Indian summer monsoon rainfall by 1–2 mm day−1, which is opposed by a larger drying tendency due to the weakening of the SST gradient. The net effect is to decrease the Indian monsoon rainfall, while preventing the sub-Saharan region from becoming too dry. Published coupled ocean–atmosphere model simulations are used to describe the competing effects of the anthropogenic radiative forcing due to greenhouse gases and the anthropogenic South Asian aerosols on the observed SST gradient and the monsoon rainfall.
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Self-citationThe National Center for Atmospheric Research Community Climate Model: CCM3*
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Self-citation
Metadata
- Authors
- Chung, C. E., & Ramanathan, V.
- Venue
- Journal of Climate
- Publisher
- American Meteorological Society
- Published
- 2006-05-15
- Volume
- 19
- Issue
- 10
- Pages
- 2036-2045
- ISSN
- 0894-8755 (ISSN-L)
- 1520-0442
- OpenAlex
- W2089333774
- Cited by
- 320
- References
- 22
- FWCI
- 10.95
- Type
- journal article
- Language
- en
- Open access
- bronze
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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