@article{,

title = {Evidence for eddy formation in the eastern Arabian Sea during the northeast monsoon},

author = {Bruce, John G,Johnson, Donald R,Kindle, John C},

issn = {2156-2202},

year  = {1994},

date = {1994-01-01},

journal = {Journal of Geophysical Research: Oceans},

volume = {99},

number = {59},

pages = {7651-7664},

abstract = {The seasonal formation of a large (500-800 km diameter) anticyclonic eddy

in the upper 300-400 rn of the eastern Arabian Sea during the northeast monsoon

period (December-April) is indicated from hydrographic and satellite altimetry sea level

observations, as well as from numerical model experiments. The center of the eddy

circulation is approximately 10øN, 70øE, just to the west of the north-south Laccadive

Island chain. In this paper the eddy is called the Laccadive High (LH). In some ways

it is a mirrorlike counterpart to the Great Whirl, which develops during the southwest

monsoon off the Somali coast (western Arabian Sea). The LH occurs at the same

latitude but on the opposite side of the basin during the reversed monsoon. It is

different from the Great Whirl, however, in its formation process, its intensity, and its

decay. The hydrographic data obtained from surveys all during a single season give

sufficiently close station spacing to allow reasonable contouring of the geopotential

surfaces and of the properties within and around the LH region with minimum time

aliasing. The Geosat altimeter record extends over 4 years, during which the seasonal

variability of the LH indicates a dynamic relief of approximately 15-20 cm, which is in

good agreement with the hydrographic observations. The altimetry time series also

suggests a westward translation of the LH by January with a subsequent dissipation in

midbasin. The model used is a wind-forced three-layer primitive equation model which

depicts a LH in agreement with the timing, position, and amplitude of both the

hydrographic and altimetric measurements. The numerical simulation includes a

passive tracer located in the western Bay of Bengal; the western advection of the

tracer around the south coasts of Sri Lanka and India in December and January is

consistent with the appearance of low-salinity water observed to extend into the

Arabian Sea during this period. The modeling studies suggest that both local and

remote forcing are important in formation of the LH.},

keywords = {Arabian Sea, Eddy, India, Laccadive Islands, monsoon, oceanography},

pubstate = {published},

tppubtype = {article}

}