Response of the Arabian Sea to global warming and associated regional climate shift (2009)
PrasannaKumar, S., Roshin, R.P., Narvekar, J., DineshKumar, P.K., Vivekanandan, E.
The response of the Arabian Sea to global warming is the disruption in the natural decadal cycle in the sea surface temperature (SST) after 1995, followed by a secular warming. The Arabian Sea is...
Kannangai, R, Kandathil, AJ, Daniel, HD, Prasannakumar, S, Lionnel, J, Abraham, P
The first HIV-1 marker that appears in blood following infection is HIV-1 RNA and usually the load is in millions of copies/ ml preceding seroconversion. A 24-year-old pregnant woman, gravida 2,...
Bay of Bengal Process Studies (BOBPS) Final Report (2007)
PrasannaKumar, S., Sardessai, S., Ramaiah, N., Bhosle, N.B., Ramaswamy, V., Ramesh, R., ...
The Bay of Bengal Process Studies (BOBPS) was conceived in early 1997 as a sequel to the JGOFS (Joint Global Ocean Flux Study) India - Arabian Sea Process Study. Soon after the completion of the...
Sardessai, S., Ramaiah, N., PrasannaKumar, S., DeSouza, S.N.
Studies on seasonal variability of oxygen and nutrients during three seasons namely SW monsoon, fall intermonsoon and spring intermonsoon indicate influence of physical forcings on the distribution...
Narvekar, J., PrasannaKumar, S.
Hydrographic data from NODC and RNODC were used to study the seasonal variability of the mixed layer in the central Bay of Bengal (8oN to 20oN and 87oE to 91oE), while meteorological data from COADS...
Linking Indian rivers vs Bay of Bengal monsoon Activity (2006)
Rajamani, V., Mohanty, U.C., Ramesh, R., Bhat, G.S., Vinayachandran, P.N., Sengupta, D., ...
Nakamoto, S., Kano, M., PrasannaKumar, S., Oberhuber, J.M., Muneyama, K., Ueyoshi, K., ...
Because of the diversity of the ecosystem in the earth, modeling of such an ecosystem cannot avoid arguing which ecosystem element should be included or excluded. It is demonstrated that views of...
Gauns, M., Madhupratap, M., Ramaiah, N., Jyothibabu, R., Fernandes, V., Paul, J.T., ...
The Arabian Sea and the Bay of Bengalare tropical basins experiencing monsoonalwind forcing that reverses semiannually. This brings changes in physics, chemistry and biology of the upper water column...
PrasannaKumar, S., Narvekar, J.
The upper layers of the ocean play an important role in the regulation of the ocean-atmosphere as a coupled system. The Arabian Sea, situated in the western part of the northern Indian Ocean,...
PrasannaKumar, S., Ishida, A., Yoneyama, K., RameshKumar, M.R., Kashino, Y., Mitsudera, H.
The time evolution of the Indian Ocean warm pool, studied using a global high-resolution general circulation model, shows strong seasonality. The warm pool has the largest spatial extent during...
Are eddies nature’s trigger to enhance biological productivity in the Bay of Bengal? (2004)
PrasannaKumar, S., Nuncio, M., Kumar, A., Sardessai, S., DeSouza, S.N., Gauns, M., ...
The Bay of Bengal is traditionally considered to be a less productive basin compared to the Arabian Sea. Despite the contrasting chlorophyll and primary productivity pattern, sediment trap data shows...
PrasannaKumar, S., Narvekar, J., Kumar, A., Shaji, C., Anand, P., Sabu, P., ...
Situated in similar latitudes and subjected to similar atmospheric forcing, the tropical basins of the Arabian Sea looses fresh water due to excess evaporation over precipitation while Bay of Bengal...
Madhupratap, M., Gauns, M., Ramaiah, N., PrasannaKumar, S., Muraleedharan, P.M., DeSousa, S.N., ...
Reliable data on biological characteristics from the Bay of Bengal are elusive. In this paper, we present results on physics, chemistry and biology simultaneously measured during the summer monsoon,...
Carbon budget in the eastern and central Arabian Sea: An Indian JGOFS synthesis (2003)
Swathi, P.S., DileepKumar, M., PrasannaKumar, S., Bhattathiri, P.M.A., Madhupratap, M., ...
The carbon budget for the eastern and central Arabian Sea was constructed using results from the Modular Ocean Model and biogeochemical data collected largely under the Indian Joint Global Ocean Flux...
Why is the Bay of Bengal less productive during summer monsoon compared to the Arabian Sea? (2002)
PrasannaKumar, S., Muraleedharan, P.M., Prasad, T.G., Gauns, M., Ramaiah, N., DeSouza, S.N., ...
The Bay of Bengal is traditionally considered to be a less productive basin compared to the Arabian Sea. We explore the reasons for this in the central Bay during summer when both are subjected to...
Nakamoto, S., PrasannaKumar, S., Oberhuber, J.M., Saito, H., Muneyama, K., Frouin, R.
Western tropical Indian Ocean, Arabian Sea, and the equatorial Pacific are known as regions of intense bio-chemical-physical interactions: the Arabian Sea has the largest phytoplankton bloom with...
Nakamoto, S., PrasannaKumar, S., Oberhuber, J.M., Sammarco, P., Muneyama, K., Sato, T., ...
Wind patterns in the equatorial Pacific and Indian oceans are the factors that regulate the chlorophyll pigment distributions in the equatorial region of these oceans. Trade winds and coastline of...
Nakamoto, S., Saito, H., Muneyama, K., Sato, T., PrasannaKumar, S., Kumar, A., ...
In the ocean mixed layer, phytoplanktons convert carbon dioxide into organic matter, which is accumulated into the body of phytoplankton, zooplankton, and fish communities. At the end of ocean...
PrasannaKumar, S., Madhupratap, M., DileepKumar, M., Muraleedharan, P.M., DeSouza, S.N., Gauns, M., ...
Open oceans are generally oligotrophic and support less biological production. Results from the central Arabian Sea show that it may be an exception to this. We provide the observational evidence of...
Nakamoto, S., PrasannaKumar, S., Oberhuber, J.M., Ishizaka, J., Muneyama, K., Frouin, R.
The influence of phytoplankton on the upper ocean dynamics and thermodynamics in the equatorial Pacific is investigated using an isopycnal ocean general circulation model (OPYC) coupled with a mixed...
PrasannaKumar, S., Ramaiah, N., Gauns, M., Muraleedharan, P.M., Raghukumar, S., ...
Time-series observations at a nominally fixed location in the northern Arabian Sea (21 degrees N, 64 degrees E) during the Northeast Monsoon (winter, February) of 1997 showed the prevalence of cold...
Seasonal spreading of the Persian Gulf water mass in the Arabian Sea (2001)
Prasad, T.G., Ikeda, M., PrasannaKumar, S.
The characteristics of the subsurface salinity maximum associated with the Persian Gulf Water mass (PGW) are used to quantify the spreading and mixing of PGW in the thermocline of the Arabian Sea...
PrasannaKumar, S., Madhupratap, M., DileepKumar, M., Gauns, M., Muraleedharan, P.M., ...
Using in situ data collected during 1992-1997, under the Indian programme of Joint Global Ocean Flux Study (JGOFS), it is shown that the biological productivity of the Arabian Sea is tightly coupled...
Nakamoto, S., PrasannaKumar, S., Oberhuber, J.M., Saito, H., Muneyama, K.
Western Tropical Indian Ocean, Arabian Sea and equatorial Pacific are known to be regions of intense bio-chemical-physical interactions with Arabian sea being largest in seasonal phytoplankton bloom...
PrasannaKumar, S., Unnikrishnan, A.S., Muraleedharan, P.M.
The climatological monthly mean sea surface height (SSH) anomalies derived from T/P altimeter in the northern Indian Ocean, during 1993 to 1997, are used to prepare time-longitude plots. Along the...
Nakamoto, S., PrasannaKumar, S., Muneyama, K., Frouin, R.
Remotely sensed chlorophyll pigment concentrations from the Coastal Zone Color Scanner (CZCS) are used to estimate biological heating rate and investigate the biological modulation of the sea surface...
Acoustic tomography experiment in the eastern Arabian Sea (1999)
PrasannaKumar, S., Murty, T.V.R., Somayajulu, Y.K., Saran, A.K., Navelkar, G.S., Almeida, A.M., ...
An acoustic transmission experiment was conducted in the eastern Arabian Sea along 12.5 degrees N latitude for a duration of ten days (2-12 May, 1993), with two transceiver systems deployed on deep...
Formation and spreading of Arabian Sea high-salinity water mass (1999)
PrasannaKumar, S., Prasad, T.G.
The formation and seasonal spreading of the Arabian Sea High-Salinity Water (ASHSW) mass were studied based on the monthly mean climatology of temperature and salinity in the Arabian Sea, north of...
PrasannaKumar, S., Snaith, H., Challenor, P., Guymer, H.T.
The seasonal and inter-annual variability of the northern Indian Ocean was studied by analysing 10-day snapshots of sea surface height (SSH) data from TOPEX/POSEIDON altimeter for the period November...
PrasannaKumar, S., Navelkar, G.S., Murty, T.V.R., Murty, C.S.
Acoustic characteristics of a subsurface, cold core eddy observed in the Bay of Bengal during southwest monsoon period is presented based on CTD (Conductivity Temperature Depth) data from 42...
Acoustic propagational characteristics and tomography studies of the northern Indian Ocean (1997)
PrasannaKumar, S., Somayajulu, Y.K., Murty, T.V.R.
The results of the acoustic tomographic studies carried out in five sections of the Northern Indian Ocean is given. The characteristics of the sound speed field of the northern Indian Ocean...
PrasannaKumar, S., Navelkar, G.S., Murty, T.V.R., Somayajulu, Y.K., Saran, A.K., Murty, C.S.
Simulated acoustic propagation showed a gradual deepening of the ray paths from the southern ocean towards tropics. Also the axis of the sound channel deepens from 150 m to 1600 m. Sudden jumps were...
Winter cooling in the northern Arabian Sea (1996)
PrasannaKumar, S., Prasad, T.G.
The upper thermo-haline structure and the surface meteorological parameters of the central and eastern Arabian Sea during the inter-monsoon (April-May, 1994) and winter monsoon (February-March, 1995)...
Mechanism of the biological response to winter cooling in the northeastern Arabian Sea (1996)
Madhupratap, M., PrasannaKumar, S., Bhattathiri, P.M.A., DileepKumar, M., Raghukumar, S., Nair, K.K.C., ...
The Arabian Sea is one of the most biologically productive ocean regions, mainly due to the upwelling of nutrients during the summer (southwest) monsoon. But the northern Arabian Sea continues to...
Arabian Sea upwelling - A comparison between coastal and open ocean regions (1996)
Muraleedharan, P.M., PrasannaKumar, S.
The response of the eastern Arabian Sea to prevailing winds during an upwelling event, in the peak of southwest monsoon, was studied at both coastal and open ocean environment based on the data...
PrasannaKumar, S., Navelkar, G.S., Murty, T.V.R., Murty, C.S.
Acoustic characteristics of a cold core eddy, observed in the Bay of Bengal during southwest monsoon period is studied using CTD data along the western boundary. The presence of eddy brings about a...
Preliminary results of an acoustic tomography experiment (ATE-93) in the eastern Arabian Sea (1994)
PrasannaKumar, S., Somayajulu, Y.K., Murty, T.V.R., Navelkar, G.S., Saran, A.K., Almeida, A.M., ...
An acoustic transmission experiment was conducted in the eastern Arabian Sea by deploying two transceiver systems on deep sea moorings separatEd. by 270 km. The experiment lasted for a duration of...
Sound speed structure in the Arabian Sea and the Bay of Bengal (1993)
PrasannaKumar, S., Navelkar, G.S., Murty, T.V.R., Somayajulu, Y.K., Murty, C.S.
Sound speed computed from annual mean temperature and salinity data of Levitus reveals that spatial variation in the Arabian Sea is greater than that in the Bay of Bengal. Maximum spatial variation...
PrasannaKumar, S., Babu, M.T., Murty, T.V.R.
An analysis of acoustic characteristics of a cold core eddy in the Bay of Bengal reveals that the eddy introduces in sound-speEd. by about 10 ms-1. The depth of deep sound channel axis beneath eddy...
Energy and generating mechanism of a subsurface, cold core eddy in the Bay of Bengal (1992)
PrasannaKumar, S., Babu, M.T., Rao, D.P.
Computation of available potential energy (APE) of a recently observed cold core, subsurface eddy (centered at 17 degrees 40'N and 85 degrees 19'E) in the Bay of Bengal revealed that the energy...
Acoustic waveguide characteristics of the Indian Ocean - north of equator (1992)
PrasannaKumar, S., Murty, T.V.R., Somayajulu, Y.K., Murty, C.S.
The acoustic characteristics of the waters of the Arabian Sea and Bay of Bengal, constituting the northern Indian Ocean, are analysed based on a climatological mean sound speed field. In the upper...
Equatorial jet - a case study (1992)
Muraleedharan, P.M., PrasannaKumar, S.
Detailed EOF analysis of wind data reportEd. by Wunsch over Gan (00 degrees 41'S; 73 degrees 10'E) is made for the period 1963-70. The year 1964, which exhibited least variability from mean wind...
Surface heat budget of the Caribbean Sea during the pre-hurricane period (April-May) of 1990 (1991)
Murty, V.S.N., PrasannaKumar, S., Brown, P.E., Gray, C.R., Hulse, J., Jeremiah, P., ...
Hydrographic characteristics and circulation in the Caribbean Sea during April and May 1990 (1991)
PrasannaKumar, S., Murty, V.S.N., Khan, A.A., Jones, M.A., Wagh, A.B., Desai, B.N.
A subsurface cyclonic eddy in the Bay of Bengal (1991)
Babu, M.T., PrasannaKumar, S., Rao, D.P.
CTD data collected from the Northwestern Bay of Bengal during late July 1984 reveal the existence of a cold core subsurface eddy centred at 17 degrees 40'N and 85 degrees 19'E. The thermal structure...
Wave-induced nearshore flow patterns in the vicinity of Cochin harbour, India (1990)
PrasannaKumar, S., Vethamony, P., Murty, C.S.
The wave-induced nearshore circulation and the sediment exchanges between two littoral cells along the beaches bordering Vypeen and Chellanam islands in the vicinity of Fort Cochin are examined. In...