Zonal Temperature-Anomaly Maps of Indian Ocean Surface Waters: Modern and Ice-Age Patterns

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Science  26 Oct 1979:
Vol. 206, Issue 4417, pp. 454-456
DOI: 10.1126/science.206.4417.454


Maps of sea surface temperature anomalies in the Indian Ocean in modern and ice-age times reveal striking changes in its surface circulation. During the last glacial maximum (18,000 years before the present), the Indian Ocean had colder average zonal surface temperatures, a cooler and less extensive Agulhas Current, a distinct eastern boundary current, and decreased upwelling and a weaker southwest monsoon in its northwestern region.