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Holistic Approach to Upwelling and Downwelling along the South-West Coast of India

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Relation http://eprints.cmfri.org.in/13365/
https://doi.org/10.1080/01490419.2018.1553805
 
Title Holistic Approach to Upwelling and Downwelling
along the South-West Coast of India
 
Creator Shah, Phiros
Sajeev, R
Thara, K J
George, Grinson
Shafeeque, Muhammed
Akash, S
Platt, Trevor
 
Subject Oceanography
Upwelling
Remote sensing
Seawater study
 
Description An attempt has been made to develop a holistic understanding
of upwelling and downwelling along the south-west coast
of India. The main objective was to elucidate the roles of different
forcings involved in the vertical motion along this coast.
The south-west coast of India was characterized by upwelling
during the south-west monsoon (May to September) and by
downwelling during the north-east monsoon and winter
(November to February). The average vertical velocity calculated
along the south-west coast from the vertical shift of the
26 �C isotherm is 0.57 m/day during upwelling and 0.698 m/
day during downwelling. It was concluded that upwelling
along the south-west coast of India is driven by offshore
Ekman transport due to the alongshore wind, Ekman pumping,
horizontal divergence of currents and by the propagation
of coastally trapped waves. Whereas downwelling along the
coast is driven only by convergence of currents and the
propagation of coastally trapped Kelvin waves. Along the west
coast of India, the downwelling-favorable Kelvin waves come
from the equator and upwelling-favorable waves come from
the Gulf of Mannar region.
 
Date 2019
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/13365/1/Phiros%20Shah_2019_Marine%20Geodesy.pdf
Shah, Phiros and Sajeev, R and Thara, K J and George, Grinson and Shafeeque, Muhammed and Akash, S and Platt, Trevor (2019) Holistic Approach to Upwelling and Downwelling along the South-West Coast of India. Marine Geodesy. pp. 1-21.