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Impact of model resolutions on Indian ocean simulations from Global NEMO Ocean Model

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Title Impact of model resolutions on Indian ocean simulations from Global NEMO Ocean Model
 
Creator Momin, I.M.
Mitra, A. K.
Mahapatra, D.K.
Gera, A.
Rajagopal, E.N.
 
Subject NEMO Ocean model
Indian Ocean Simulation
Coupled Modelling
Monsoon
Air-Sea Interaction
 
Description 1667-1674
A relatively newer version of Nucleus for
European Modeling of the Ocean, NEMO, (v3.2) ocean model was configured
recently on a high performance computing system at NCMRWF. These initial global
model simulations were examined at two different resolutions - a coarser
resolution (20x20 with 31 vertical layers) and another at
a higher resolution (10x10 with 42 vertical layers) with
climatological observed forcings.  Sea
Surface Temperature (SST), Sea Surface Salinity (SSS), 20 degree isotherm depth
(D20), heat content in upper 300mts (HC)and surface currents from both coarser
and higher resolution model versions were examined for different regions of the
Indian Ocean for typical summer (July) and winter (December) periods including
the annual cycle. For SST, D20, HC, SSS and summer surface currents, generally
the higher resolution version is seen closer to observations and has lesser
biases.  Simulated annual cycle as seen
through SST and SSS at three different typical regions of Indian Ocean are
simulated well, with lesser bias in the higher resolution version. However,
near head Bay of Bengal and northern Arabian Sea regions the low SST is not
simulated well in the model.  Mini cold
pool near southern tip of Indian peninsula is also not simulated well. In the
equatorial Indian Ocean region, the model has difficulty in simulating the
annual cycle even with the enhanced resolution. In the higher resolution version,
the surface currents near equator during winter is seen to be very high
compared to observations.
 
Date 2016-06-27T09:49:07Z
2016-06-27T09:49:07Z
2014-09
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34477
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(9) [September 2014]