Browsing Institute's contributions by Title
Now showing items 910-929 of 9167
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Atypical ferromanganese micronodules from middle fan-valley system, Bay of Bengal
(Current Science Association, 1994)Ferromanganese micronodules having botryoidal and spheroidal morphogroups have been observed over a 0.22 million km@u2@@ area from the middle fan region of the Bay of Bengal. The bulk micronodules have 26.26% Mn, 1.02% Fe, ... -
Augmented coral reef monitoring using a stationary reef monitoring system
(Elsevier, 2023)Coral reef monitoring is a reliable tool to assess the effect of climate change as corals are sensitive to increases in water temperatures between 30 �C and 35 �C resulting in bleaching - a whitening process when the corals ... -
Australasian microtektites from the Central Indian Basin: Implications for ejecta distribution patterns
(Current Science Association, Bangalore, India, 1996)Microtektites belonging to the Australasian tektite strewn field have been recovered in one (SK-16/176) out of three cores examined from the Central Indian Basin. The microtektites have been identified based on their ... -
Australasian microtektites in a substrate: A new constraint on ferromanganese crust accumulation rates
(Elsevier, 1994)Microtektites belonging to the Australasian tektite strewn field are found in the substrate of a ferromanganese crust dredged from the Central Indian Basin. They are identified on their physical appearance, geographic ... -
Australian Clarke Bumpus sampler
(Cochin: IOBC, 1972) -
Australian minitektites discovered in the Indian Ocean
(Meteoritical Society, Fayetteville, USA, 1999)Large area sampling with a box core in the Indian Ocean has led to the discovery of minitektites (> 1-3.75 mm long) and a tektite fragment (approx 1.25 mm) occuring with microtektites belonging to the Australasian tektite ... -
Authigenic carbonates in the sediments of Goa offshore basin, western continental margin of India
(Current Science Association, 2012)Euhedral crystals (approx. 1 mm) of authigenic carbonates are identified in 5 m long sediment cores collected from the western continental margin of India in water depths between 2665 and 3070 m. Low-Mg calcite and aragonite ... -
Authigenic Gypsum in a Deep Sea Core from Southeastern Arabian Sea
(Geological Society of India, 1980)Authigenic gypsum has been encountered in a deep sea core RC9-157 from the southeastern Arabian Sea at a depth of 4111 m which is a zone of lysocline. The formation of gypsum in the deep sea region is attributed to the ... -
Authigenic Gypsum in Gas-Hydrate Associated Sediments from the East Coast of India (Bay of Bengal)
(Geological Society of China, 2013)Authigenic gypsum crystals, along with pyrite and carbonate mineralization, predominantly calcites were noticed in distinct intervals in a 32 m long piston core, collected in the gas hydrate-bearing sediments in the northern ... -
Authigenic minerals from the continental margins
(National Institute of Oceanography, India, 2007) -
Auto-correlograms and auto-regressive models of trace metal distributions in Cochin backwaters
(CSIR-NISCAIR, 1983)Auto-correlation technique has been applied to study fluctuations in concentration profiles of chemical species in Cochin Backwaters (Kerala, India). No stability in time can be detected for particulate Mn at all stations, ... -
Automatic interpretation of magnetic data using Euler deconvolution with nonlinear background
(Birkhauser, 2007)The voluminous gravity and magnetic data sets demand automatic interpretation techniques like Naudy, Euler and Werner deconvolution. Of these techniques, the Euler deconvolution has become a popular choice because the ... -
Autonomous profiling device to monitor remote water bodies
(Current Science Association, 2012)In tropical climates, most freshwater reservoirs, dams and lakes are prone to annual summer stratification during which bottom water layers near the bed become hypoxic (<2 ml/l) with very low concentrations of dissolved ... -
Autonomous profiling float observations reveal the dynamics of deep biomass distributions in the denitrifying oxygen minimum zone of the Arabian Sea
(Elsevier B.V., 2020)Data from 13 autonomous profiling BGC-Argo floats, equipped with biogeochemical and bio-optical sensors deployed between 2011 and 2016, were used to explore the potential of bio-optical methods to map deep biomass distribution ... -
Autonomous vertical profiler data management
(Springer, 2010)The Autonomous Vertical Profiler (AVP), developed at NIO [1] [2], collects position and water column data over a period of 3 days and transmits through a satellite modem which is collated and stored on a PC. Data includes ... -
Autoregressive modelling of measured sea waves off west coast of India
(Brazilian Water Resources Association, Brazil, 1995)The spectral analysis of measured sea waves can efficiently be carried out by the Fast Fourier Transform (FFT) technique. Even though many present techniques can be used for the generation of time series on sea waves from ... -
Autoregressive spectral analysis of crane vessel motions in sea waves
(CWPRS, Pune, 1994) -
Autotrophic and heterotrophic characteristics in a polluted tropical estuarine complex
(Academic Press, 1995)Some species of microbial heterotrophic communities (14C glucose uptake and respiration; viable nad total bacterial numbers) and autotrophic communities (primary production rate, chlorophyll a, phytoplankton cell counts ... -
Autotrophic potential in mesophilic heterotrophic bacterial isolates from Sino-Pacific marine sediments
(Springer and Chinese Society of Oceanography, 2017)Microbial carbon fixation is a paramount process in the ocean especially below the photic zone both in water and sedimentary ecosystems. Autotrophic microbes that fix carbon dioxide are renowned. However, the question ... -
A~30 kyr sub-centennial to millennial Indian summer monsoon variability record from the southern Andaman Sea, northeastern Indian Ocean
(Elsevier, 2022)This paper reports centennial-scale variations in the Indian summer monsoon (ISM) that induced stratification and resultant productivity changes in the southern Andaman Sea. The study is based on foraminifera assemblages ...