Atmospheric general circulation model simulations with an interactive ocean: Effects of sea surface temperature anomalies in the arabian sea

Leonard M. Drayan, James R. Miller, Gary L. Russell

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Three different simulations using an atmospheric general circulation model (GCM) with a 65‐m deep interactive ocean have been analysed for a 4‐month period (April‐July) in the Arabian Sea area. Although the ocean model contains no dynamics, it accounts indirectly for the transport of heat due to dynamic processes such as upwelling and horizontal advection. The first simulation does not include ocean heat transport, and the SST increases too much during the 4‐month period. The second simulation includes oceanic heat transport, and the final SST field is within a few per cent of the climatological SST field. The ocean transports are obtained by assuming that they are the differences between the vertical heat fluxes across the air‐sea interface as calculated from the GCM and the change in heat content of a 65‐m deep interactive ocean. The third simulation incorporates an initial negative SST anomaly into the ocean model with transport and analyses the effect of this anomaly on the ocean and the atmosphere. The effects on the ocean arise because of feedback from the atmosphere. In the ocean, the northern part of the SST anomaly propagates from the western boundary downwind across the Arabian Sea while the southern part of the anomaly disappears. This occurs primarily because of changes in the latent heat fluxes. In the atmosphere, an increase in precipitation to the east of the initial anomaly propagates downwind ahead of the propagating SST anomaly until it eventually appears over India in July.

Original languageEnglish (US)
Pages (from-to)94-106
Number of pages13
JournalAtmosphere - Ocean
Volume21
Issue number1
DOIs
StatePublished - Jan 1 1983

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Atmospheric Science

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