Browsing Scholarly literature by Author "Naik, S.S."
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Evidences of CO2 Leakage During the Last Deglaciation: The Need to Understand Deep-ocean Carbonate Chemistry of the Arabian Sea
Naik, S.N.; Naik, S.S. (Geological Society of India, India, 2018)It is generally accepted view that the ventilation of Southern Ocean during the last deglaciation was the key factor in atmospheric CO2 rise. Further, other sites were identified, like the western equatorial Pacific, the ... -
Glacial-interglacial contrast in deep-water δ13C of the Arabian Sea
Naik, S.N.; Naik, S.S. (Springer, 2022)Carbon and oxygen isotopic ratios of foraminiferal test are exclusively used for tracing the past changes in ocean circulation, air-sea exchange, global carbon cycle and temperature variations of water masses. Here we ... -
Glacial-interglacial differences in carbonate burial in the equatorial Indian Ocean
Yadav, Ramanand; Naik, S.S. (Springer, 2022)To understand the variations in carbonate burial for the last 30 kiloannum (ka), we have utilized a core from the Ocean Drilling Program (ODP), Site716A (04.56�N and 73.17�E) retrieved from a water depth of 533~m from the ... -
High resolution climate reconstructions of recent warming using instrumental and ice core records from coastal Antarctica
Thamban, M.; Naik, S.S.; Laluraj, C.M.; Ravindra, R. (India Meteorological Department, 2011)In-situ observational record of Antarctic surface temperatures is rather sparse. Proxy based ice core studies are thus critical for reconstructing the past climate change on centennial and decadal time scales. The present ... -
Immediate effect of simulated sand mining on the variation of bacterial parameters in coastal waters of Kalbadevi Bay, Ratnagiri
Fernandes, C.E.G.; Das, A.; Naik, S.S.; Sharma, R.; LokaBharathi, P.A. (Macmillan, India, 2007)The variation in bacterial parameters of coastal waters and sediments of Kalbadevi Bay, Ratnagiri, Maharashtra, India was examined for immediate response after simulated mining. Sampling was carried out at suction and ... -
Increased Ventilation of the Northern Indian Ocean during the Last Deglaciation
Naik, S.S.; Nisha, K. (Springer, 2020)This paper gives an overview of the deep-water ventilation studies carried out over the world oceans using radiocarbon. There is a consensus that aged water mass existing in the abyssal ocean during the last glacial, ... -
Last 10000 years Variation in the Intensity of OMZ-Core Reconstructed from Sediment of the Eastern Arabian Sea
Joshi, G.P.; Naik, S.S.; Banakar, V.K. (Springer, 2021)The Arabian Sea Oxygen Minimum Zone (OMZ) is one of the most intense of the world ocean OMZs witnessing denitrification, hence, has implications to global climate. In order to understand the Holocene variations in the OMZ ... -
Microbial and biochemical alterations due to storage of deep-sea sediments under ambient tropical conditions
Das, A.; Fernandes, C.E.G.; Naik, S.S.; Mourya, B.S.; Sujith, P.P.; Sharma, R.; LokaBharathi, P.A. (NISCAIR Publications, 2016)Response of indigenous bacteria to incubation at normal pressure and tropical temperature (28 ± 2°C), were examined in four deep-sea sediments from polymetallic-nodule fields in Central Indian Basin (CIB). Sediments were ... -
Nitrate records of a shallow ice core from East Antarctica: Atmospheric processes, preservation and climatic implications
Laluraj, C.M.; Thamban, M.; Naik, S.S.; Redkar, B.L.; Chaturvedi, A.; Ravindra, R. (SAGE Publications, 2011)High-resolution records of nitrate (NO sub(3) sup(-)), oxygen isotope (delta sup(18) O) and non-sea salt sulphate (nssSO sub(4) sup(2-)) were studied using an ice core collected from central Dronning Maud Land in East ... -
Oxygen isotopic analyses of individual planktic foraminifera species: Implications for seasonality in the western Arabian Sea
Naidu, P.D.; Niitsuma, N.; Naik, S.S. (Copernicus Publications, 2014)The variation of stable isotopes between individual shells of planktic foraminifera of a given species and size may provide short-term seasonal insight on Paleoceanography. In this context, oxygen isotope analyses of ... -
Possible factors that control calcite dissolution in the western tropical Indian Ocean
Naik, S.S.; Naidu, P.D. (Current Science Association, 2008)Calcite dissolution in marine sediments is known to be driven by the degree of saturation state with respect to calcium carbonate, of overlying bottom waters. Three paleocarbonateion proxies, planktonic foraminifer size ... -
Radiocarbon evidence for reduced deep water ventilation of the northern Indian Ocean during the last glacial maxima and early deglaciation
Nisha, Kumari; Naik, S.S.; Kumar, Pankaj; Banerjee, Barnita; Murty, P.B.R. (Elsevier, 2023)Enhanced outgassing of sequestered carbon to the atmosphere by upwelling of deep water in the Southern Ocean during the last deglaciation is assumed to be the main factor that modulated changes in atmospheric CO2 and ... -
Reconstruction of Antarctic climate change using ice core proxy records from the coastal Dronning Maud Land, East Antarctica
Thamban, M.; Laluraj, C.M.; Naik, S.S.; Chaturvedi, A. (Geological Society of India, 2011)Antarctic ice core records have provided unprecedented information on past climatic changes and forcing factors on decadal to millennial timescales. The glaciochemical and stable isotope records of a shallow ice core from ... -
Relationship between weights of planktonic foraminifer shell and surface water CO sub(3) sup(=) concentration during the Holocene and Last Glacial Period
Naik, S.S.; Naidu, P.D.; Govil, P.; Godad, S. (Elsevier, 2010)Shell weights of Globigerinoides sacculifer and the elemental concentration of magnesium and calcium (Mg/Ca) from Globigerinoides ruber measured from an Arabian Sea sediment core, AAS9/21, exhibit an inverse relationship ... -
Relationship of sediment-biochemistry, bacterial morphology, and activity to geotechnical properties in the central Indian Basin
Naik, S.S.; Khadge, N.H.; Valsangkar, A.B.; Das, A.; Fernandes, C.E.G.; LokaBharathi, P.A. (Taylor & Francis, 2016)Distribution of biochemical properties, morphological and functional characteristics of bacteria in the extreme sedimentary environment of the Central Indian Basin (CIB) was examined in relation to geotechnical properties ... -
Shell weights of foraminifera trace atmospheric CO2 from the Miocene to Pleistocene in the central Equatorial Indian Ocean
Mungekar, T.V.; Naik, S.S.; Nath, B.N.; Pandey, D.K. (Springer, 2020)The Maldives Sea is a region dominated by the South Asian monsoon (SAM) and at present, a CO2 source to the atmosphere. Ti/Al elemental ratios from Site U1467 and U1468 recovered from the Maldives Sea show a gradual increase ... -
Significant seasonal contrast in the Arabian Sea during deglaciation: Evidence from oxygen isotopic analyses of individual planktic foraminifera
Naidu, P.D.; Niitsuma, N.; Thirumalai, K.; Naik, S.S. (Elsevier, 2019)The variation of stable isotopes between individual shells of planktic foraminifera of a given species and size may provide short-term seasonal insight into past sea surface temperature (SST) and salinity (SSS). In this ... -
The equatorial Indian Ocean upper water-column structure influenced by cross-basinal water exchange over the last ~40000 years
Yadav, Ramanand; Naik, S.S.; Narvekar, J. (Elsevier, 2022)The central equatorial Indian Ocean (CEIO) is influenced by both, summer and winter monsoon and is known for cross basin exchange of water between the Arabian Sea (AS) and the Bay of Bengal (BoB).Here, we present planktic ... -
Tracing the strength of the southwest monsoon using boron isotopes in the eastern Arabian Sea
Naik, S.S.; Naidu, P.D.; Foster, G.L.; Martínez-Boti, M.A. (American Geophysical Union, 2015)Here we present the first boron isotope-based pCO<sub>2</sub><sup>sw</sup> (pCO<sub>2</sub> of seawater) reconstruction from the eastern Arabian Sea using the planktic foraminifera species Globigerinoides ruber. Our results ... -
Use of the Boron partition coefficient ‘K<sub>D</sub>’ and B/Ca from planktonic foraminifera in the estimation of past seawater pCO<sub>2</sub>
Naik, S.S.; Naidu, P.D. (Geochemical Society of Japan, 2015)We assess the usefulness of the empirical boron partition coefficient, K<sub>D</sub> and B/Ca measured from planktonic foraminifera in estimation of pCO<sub>2</sub> using three different relationships between K<sub>D</sub> ...