DRS at CSIR-National Institute of Oceanography: Recent submissions
Now showing items 4121-4140 of 9443
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Size-fractionated biomass, photosynthesis and dark CO2 fixation in a tropical oceanic environment
(Cambridge University Press, 1992)This study examines the spatial distribution and size structure of phytoplankton biomass and productivity in relation to the vertical structure of the Andaman Sea (northern Indian Ocean). This region was characterizEd. by ... -
Tectonic reactivation in the Indian Ocean: Evidences from seamount morphology and manganese nodule characteristics
(Geological Society of India, 1992)The Central Indian Ocean Basin (CIOB) was subjected to tectonic reactivation in geological past which is unusual for a basin occurring on an apparently single tectonic plate. ENE-WSW trending latitude parallel zone of ... -
Foraminiferal production and monsoonal upwelling in the Arabian sea: evidence from sediment traps
(Geological Society of London, 1992)Planktonic foraminifera collected in sediment traps in the Arabian Sea during 1986 and 1987 responded to the southern Asian monsoon with changes in productivity, relative abundance of species and isotopic shell chemistry. ... -
Can benthic foraminiferal morpho-groups be used as indicators of paleomonsoonal precipitation?
(Academic Press, 1992)A technique is proposed for the quick and easy assessment of paleomonsoonal precipitation through the study of morphological groups of foraminifera in a shallow water (20 m water depth) sediment core collected off Karwar, ... -
Changing sedimentary environments during Pleistocene-Holocene in a core from the eastern continental margin of India
(Geological Society of India, 1992)Sedimentological and geochemical investigations of the sediments in a core from the eastern continental margin of India, at a water depth of 1200 m, revealed two distinct types. The Late Pleistocene sediments are greyish-black ... -
Slope angle studies from multibeam sonar data on three seamounts in Central Indian Basin
(Offshore Technology Conference, 1992)Slope angles are powerful morphometric tools. Slope angle studies in manganese nodule areas using the Multi Beam Sonar (MBS) data is useful to the mining geologist. A technique to convert depth grid generated from MBS data ... -
Particle fluxes in the Bay of Bengal measurEd. by sediment traps
(Geological Survey of India, 1992)Particle fluxes were measured between October, 1987 and March, 1988 using six automated time series sediment traps at three locations in the northern, central and southern Bay of Bengal. Particle fluxes varied between 16.8 ... -
Distribution of nodules and associated features in the Central Indian Basin: observations from seabed photogarphs
(Oxford and IBH, New Delhi, 1992)Observations from more than one thousand seabed photographs, have brought out various factors which influence the distribution of nodules, sediments and rocks and as a result six different phases have been identified for ... -
A re-evaluation of palaeoclimatic conditions during the Pleistocene and Holocene from the western continental shelf of India - Evidences from the petrology of the limestones
(Oxford and IBH, New Delhi, 1992)The western shelf of India is characterisEd. by the presence of Recent clayey sediments on the inner shelf and relict carbonate sediments and a variety of limestones on the outer shelf. The limestones of the outer continental ... -
Geotechnical properties of deep-sea sediments from central Indian Ocean Basin
(NISCAIR, New Delhi, 1992)Physical and geotechnical properties of 2 sediment cores from the nodule rich area of the Central Indian Ocean Basin are studied to know the sediment characteristics. Average water content of sediment from 2 deep-sea cores ... -
Rare earth element patterns of the Central Indian Basin sediments related to their lithology
(American Geophysical Union, 1992)Rare earth element (REE) concentration have been determined in terrigenous, siliceous (nodule barren and nodule bearing), calcareous, and red clay from the Central Indian Basin. The bulk distribution of REE, and in particular ... -
A study on the evolution of Indian Ocean triple junction and the process of deformation in the Central Indian Basin
(Oxford and IBH, New Delhi, 1992)It is generally presumed that the intraplate deformation in the Central Indian Basin (CIB) is a direct consequence of spreading across the South East Indian Ridge and the resistance to shortening at the continental collision ... -
The reciprocity between coiling direction and dimorphic reproduction in benthic foraminifera
(The Geological Society Publishing House, 1992)There are various opinions as to what parameter influences the coiling directions in foraminifera. "Do microspheric and megalospheric generations have different coiling ratios?" is an unanswered question in foraminiferal ... -
Propagation of bottom-trapped waves over variable topography
(Elsevier, 1993) -
Variation of longshore current and sediment transport along the south Maharashtra coast, west coast of India
(NISCAIR, New Delhi, 1993)The longshore current velocity varied between 0.1 and 0.33 m.sec/1. The longshore current direction was predominantly southward at Ratnagiri, Ambolgarh (Maharashtra, India), whereas it was variable at Vengurla during the ... -
Hydrography and circulation of the Bay of Bengal during early winter, 1983
(Pergamon, 1993)The large-scale circulation and the distributions of temperature, salinity and density in the Bay of Bengal during early winter (October-December 1983) are presented. The surface circulation relative to 1000 db level surface ... -
A statistical method to get surface level air-temperature from satellite observations of precipitable water
(Oceanographic Society, Japan, 1993) -
Shore protection structures along Kerala coast-low cost alteratives
(Kerala Science Congress, 1993)Several studies over the last two decades on low cost shore protection measures are reviewed to have an integrated profile with a point on application to the sheltered coasts of Kerala. It is emphasised that these alternative ...