Now showing items 5231-5250 of 9376

    • Multibeam echosounder pseudo sidescan images as a tool for manganese nodule exploration 

      Kodagali, V.N.; Chakraborty, B. (International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)
      Deep ocean floor is the storehouse of vast quantities of mineral resources and manganese nodules are one of the important resources. The method of semi quantitative evaluation of nodule resource estimation using the rms ...
    • Volcanogenic-hydrothermal iron-rich materials from the southern part of the Central Indian Ocean Basin 

      Iyer, S.D.; Gupta, S.M.; Charan, S.N.; Mills, O.P. (Elsevier, 1999)
      Reported is the occurrences of magnetite-rich spherules, Ti-rich particles and possibly nontronite recovered at 19 degrees S and 76 degrees E from the pelagic clay in the Central Indian Ocean Basin (CIOB). It is proposed ...
    • A 25 ky BP record of Himalayan aridity using muscovite and clays as proxy climate indicators 

      Gujar, A.R.; Chauhan, O.S. (Museo Geologico di Bologna, 1999)
      Based upon the temporal variations in the grain size parameters, characteristic clay minerals, their ratios and detrital muscovite content in a isotopically dated turbidity free core from hemipelagic environment. (2713 m ...
    • Seabottom backscatter studies in the western continental shelf of India 

      Chakraborty, B.; Pathak, D. (Academic Press, 1999)
      The study is initiated to observe the interaction effects of the sound signal with three different sediment bottoms in the shelf area between Cochin and Mangalore in the western continental shelf of India. An echo signal ...
    • Seasonal and spatial variations in settling manganese fluxes in the northern Arabian Sea 

      Nair, T.M.B.; Ramaswamy, V.; Shankar, R.; Ittekkot, V. (Pergamon, 1999)
      Particulate manganese (Mn) fluxes measured with six time series sediment traps showed that the annual settling fluxes were 3-6 times higher in the west compared to those in the east and central Arabian Sea. Annual detrital ...
    • Studying the Indian Ocean Ridge System: Agenda for the new century 

      Mukhopadhyay, R.; Iyer, S.D.; Banerjee, R.; Drolia, R.K. (Geological Society of India, 1999)
      Studies on the Indian Ocean Ridge System, though sporadic, was aimed to map the complete IORS petrologically and tectonically. Three areas are placed for immediate investigation; one in the slow spreading Carlsberg Ridge ...
    • Modern techniques of sea level measurement 

      Joseph, A. (Marcel Dekker, New York, USA, 1999)
    • Internet-accessible real-time weather information system 

      Desai, R.G.P.; Joseph, A.; Desa, E.; Mehra, P.; Desa, E.; Gouveia, A.D. (Cochin Univ. of Sci. Technol., Cochin, India, 1999)
      An internet-accessible real-time weather information system has been developed. This system provides real-time accessibility to weather information from a multitude of spatially distributed weather stations. The Internet ...
    • A technique to circumvent lower density water trapping by tide-wells 

      Joseph, A.; Vijaykumar, K.; Desa, E.S.; Desa, E.; Peshwe, V.B. (Cochin Univ. of Sci. and Technol., Cochin, India, 1999)
      A 3-year study of water density differences inside and outside of a conventional tide-well indicated that the average water density within the well is consistently lower than the external ambient waters. The tide-well at ...
    • Inter-comparison between Aanderaa and Potok current meters deployed during INDEX programme 

      Fernandes, A.A.; Pednekar, S.M.; Vethamony, P. (International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)
      The results of inter-comparison study between the Aanderaa RCM 7 and Potok 2M current meters deployed in the Southern Equatorial Indian Ocean during April to September 1996 in phase-2 of the INDEX programme has been ...
    • Evaluation of pressure transducers under turbid natural waters 

      Joseph, A.; Desa, E.; Desa, E.; Smith, D.; Peshwe, V.B.; Vijaykumar, K.; Desa, J.A.E. (American Meteorological Society, 1999)
      Pressure measurements made in two turbid natural waters have led to the inference that the effective depthmean in situ density values, rho sub(eff), of these waters are less than (approx equal to 0.4%-4.5%) that of the ...
    • Concentration of metals in fishes from Thane and Bassein creeks of Bombay, India 

      Krishnamurti, A.J.; Nair, V.R. (Council of Scientific and Industrial Research, New Delhi, 1999)
      Concentration of Cu, Zn, Cd, Pb and Ni in different tissues of 10 species of fishes from Thane and Bassein creeks were estimated for a period of 15 months. The trend in bioaccumulation indicated that irrespective of species ...
    • Pollution of coastal seas 

      Varkey, M.J. (Indian Academy of Sciences, Bangalore, India, 1999)
      Pollution of various environments is a consequence of population growth and industrialisation. Coastal seas form part of marine environment and are very rich in minerals, crude oil fishes etc. They are also being used for ...
    • Non-conservative controls on distribution of dissolved silicate in Cochin Backwaters 

      Balachandran, K.K.; Sankaranarayanan, V.N.; Joseph, T.; Nair, M. (Asian Fisheries Society, Indian Branch, Mangalore (India), 1999)
      Cochin backwater system was studied with regard to dissolved silicate (DSi) to understand its seasonal distribution and behaviour during estuarine mixing. Silicate had a linear relationship with salinity during the high ...
    • Use of chemicals in aquaculture - issues of concern 

      Zingde, M.D. (Indian Society for Fishery Professionals, 1999)
      Majority of aquaculture practices are still based on extensive and semi-intensive farming systems though a trend to intensify operations to enhance yields and improve the efficiency of the production process has emerged ...
    • Seasonal and spatial variability in N sub(2)O distribution in the Arabian Sea 

      Patra, P.K.; Lal, S.; Venkataramani, S.; DeSousa, S.N.; Sarma, V.V.S.S.; Sardessai, S. (Pergamon, 1999)
      Extensive measurements of nitrous oxide (N sub(2)O) were made in the central and eastern Arabian Sea during the northeast monsoon (February-March), intermonsoon (April-May) and southwest monsoon (July-August) seasons. The ...
    • The effect of pressure and temperature on aluminium hydrolysis: Implications to trace metal scavenging in natural waters 

      DileepKumar, M. (Council of Scientific and Industrial Research, New Delhi, 1999)
      Removal of aluminium through precipitation/scavenging in natural waters was evaluated based on its hydrolysis at different temperatures and pressures. In general, pH for the occurrence of cation hydrolysis was lowered with ...
    • Baseline studies and evaluation of effects of surface discharge of deep-sea mining - INDEX area 

      DeSousa, S.N.; Sardessai, S. (International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)
      Hydrochemical properties of the water column were measured at the Indian Experiment (INDEX) site in the Central Indian Ocean Basin, as a part of baseline studies for the environmental impact assessment of benthic disturbance. ...
    • Marine pollution - What are we heading for? 

      Zingde, M.D. (Indian National Science Academy, New Delhi (India), 1999)
      Unlike the open ocean, the coastal zone is the most affected and vulnerable to human abuse with several nearshore areas including well-flushed regions and enclosed and semi-enclosed seas getting increasingly polluted. This ...
    • Current trends of some organochlorinated pesticides in Yamuna River sediments around Delhi 

      Sethi, P.K.; Bhattacharyya, A.K.; Sarkar, A. (Kanuj Envirotech Pvt Ltd., New Delhi, 1999)
      Organochlorinated pesticides viz. DDTs, HCHs, and Cyclodiene compounds have been detected in the sediment samples of Yamuna River around Delhi, India during the three seasons namely pre-monsoon, monsoon and post-monsoon. ...