• Study on the sensitivity of the vertical cooling (heat sink) on the displacements of the mid-tropospheric ridge using a linear model

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    • Keywords


      Eurasian snow cover; mid-tropospheric ridge; southwest Indian monsoon; normal modes; heat sources and heat sinks

    • Abstract


      A linear model of the response of a stratified atmosphere to isolated heat sources in spherical coordinates is used to study the maintenance of the mean position of the mid tropospheric ridge and its displacement. It is well known that the performance of the southwest Indian monsoon is related to the latitudinal position of the April 500 hPa ridge along 75‡E. It was demonstrated that an anomalous cooling associated with the increased snow cover in Eurasia can result in moderate southward displacement of the mid-tropospheric ridge. The results of this study indicate that the vertically integrated cooling rate (strength of heat sink) has more effect on the southward displacement of the ridge when the sink is closer to the ridge.

    • Author Affiliations


      A Chandrasekar1

      1. Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur - 721 302, India
    • Dates

  • Journal of Earth System Science | News

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