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Boundary-Layer Meteorology

, Volume 107, Issue 3, pp 683–695 | Cite as

Variability of Mixed-Layer Heights over the Indian Ocean and Central Arabian Sea during INDOEX, IFP-99

  • D. Bala Subrahamanyam
  • Radhika Ramachandran
  • K. Sen Gupta
  • Tuhin K. Mandal
Article

Abstract

The upper air data collected from the balloon-borne GLASS Sondes launched from the Oceanic Research Vessel (ORV) Sagar Kanya during the Intensive Field Phase of the Indian Ocean experiment (INDOEX, IFP-99;SK-141 Cruise) are utilized forstudying the variability in the mixed-layer heights observed over the western tropical Indian Ocean and central Arabian Sea. During the entire cruise, typical daytime convective mixed-layer heights (roughly corresponding to 1400 LT) obtained from θV and q profiles, were observed to be in the range 200–900 m. Shallowmixed -layer heights are observed, in general, over the Inter-Tropical Convergence Zone (ITCZ). Over the central Arabian Sea, vertical profiles of θV and q demonstrate a double mixed-layer structure of the marine atmospheric boundary layer (MABL), which gradually disappears close to the Indian coastline.

Indian Ocean Experiment (INDOEX) Inter-Tropical Convergence Zone (ITCZ) Lifting condensation level (LCL) Marine atmospheric boundary layer (MABL) Mixed layer height Ocean-atmosphere interaction 

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Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • D. Bala Subrahamanyam
    • 1
  • Radhika Ramachandran
    • 1
  • K. Sen Gupta
    • 1
  • Tuhin K. Mandal
    • 2
  1. 1.Space Physics LaboratoryVikram Sarabhai Space Centre, ThiruvananthapuramKeralaIndia
  2. 2.National Physical LaboratoryNew DelhiIndia

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