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

• Published in: Boundary-layer meteorology Vol. 107; no. 3; pp. 683 - 695
• Main Authors: Subrahamanyam, D B, Ramachandran, R, Gupta, K S, Mandal, T K
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01-06-2003
• Subjects: Atmosphere; Atmospheric boundary layer; Boundary layers; Marine; Meteorology; Oceanographic research; ISW, Arabian Sea; ISW, Indian Ocean; ISW, Tropical Indian Ocean
• ISSN: 0006-8314; 1573-1472
• DOI: 10.1023/A:1022811512160

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 [theta]^sub V^ 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 [theta]^sub V^ and q demonstrate a double mixed-layer structure of the marine atmospheric boundary layer (MABL), which gradually disappears close to the Indian coastline.[PUBLICATION ABSTRACT]