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Proceedings Paper

On the warm pool dynamics in the southeastern Arabian Sea during April–May 2005 based on the satellite remote sensing and ARGO float data
Author(s): V. S. N. Murty; S. Murali Krishna; A. Nagaraju; Y. K. Somayajulu; V. Ramesh Babu; D. Sengupta; P. R. Sindu; M. Ravichandran; G. Rajesh
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Paper Abstract

Observational data from the Arabian Sea Monsoon Experiment (ARMEX-Phase IIA) in the southeastern Arabian Sea (SEAS) showed intense warming with the SST up to 31.5°C during April-May 2005. Analysis of 5-day repeat cycles of temperature and salinity profiles from an ARGO float (ID No. 2900345) in a 3°x1° box closer to ARMEX-II buoy (8.3°N, 72.68°E) in the SEAS during January-September 2005 revealed evolution of warm pool (SST>28°C) in spring 2005. The Argo data derived D20 (depth of 20°C isotherm) showed the influence of remote forcing during January-May, and local wind forcing during southwest monsoon. Low salinity waters (<34.0) occupied the top 30 m during January-February followed by temperature inversions (up to 0.5°C) in the 30-60 m depth range. From the peak spring warming, the SST dropped gradually by 3.5°C by end-July with the advent of southwest monsoon followed by a decrease in net heat gain upto 100 W/m^2. The merged weekly products of sea surface height anomalies and the NLOM simulated surface currents showed complex surface circulation consisting of seasonal Lakshadweep High/Low in winter/summer. The examined oceanic and atmospheric variables showed an intraseasonal variability with 41 to 63 day period, coinciding with the Madden-Julian Oscillation.

Paper Details

Date Published: 28 November 2006
PDF: 12 pages
Proc. SPIE 6406, Remote Sensing of the Marine Environment, 640616 (28 November 2006); doi: 10.1117/12.694254
Show Author Affiliations
V. S. N. Murty, National Institute of Oceanography (India)
S. Murali Krishna, National Institute of Oceanography (India)
A. Nagaraju, National Institute of Oceanography (India)
Y. K. Somayajulu, National Institute of Oceanography (India)
V. Ramesh Babu, National Institute of Oceanography (India)
D. Sengupta, Indian Institute of Science (India)
P. R. Sindu, Indian Institute of Science (India)
M. Ravichandran, Indian National Ctr. for Ocean Information Science (India)
G. Rajesh, National Institute of Ocean Technology (India)

Published in SPIE Proceedings Vol. 6406:
Remote Sensing of the Marine Environment
Robert J. Frouin; Vijay K. Agarwal; Hiroshi Kawamura; Shailesh Nayak; Delu Pan, Editor(s)

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