Browsing by Author "Yadav, K."
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Acidification of the coastal Bay of Bengal by aerosols deposition
Kumari, V.R.; Yadav, K.; Sarma, V.V.S.S.; DileepKumar, M. (Springer, 2021)Polluted aerosol transport from South Asia containing oxides of nitrogen and sulphur and their deposition on surface may acidify coastal waters. To test this hypothesis, we have conducted experiments involving (a) variability ... -
Decadal variations in natural and anthropogenic aerosol optical depth over the Bay of Bengal: the influence of pollutants from Indo - Gangetic Plain
Yadav, K.; Rao, V.D.; Sridevi, B.; Sarma, V.V.S.S. (Springer, 2021)Perennial increase in atmospheric pollution over the Bay of Bengal (BoB) and South China Sea is reported due to increase in human population and industrial activity in South and Southeast Asia. Based on total aerosol optical ... -
Elevated acidification rates due to deposition of atmospheric pollutants in the coastal Bay of Bengal
Sarma, V.V.S.S.; Krishna, M.S.; Srinivas, T.N.R.; Kumari, V.R.; Yadav, K.; Kumar, M.D. (AGU Wiley, 2021)Human inputs of pollutants to the atmosphere and subsequent deposition may decrease pH in the coastal waters. Significant rate of decrease in pH and increase in pCO2 by 3-5 times is noticed in the coastal Bay of Bengal ... -
Impact of atmospheric anthropogenic nitrogen on new production in the northern Indian Ocean: Constrained based on satellite aerosol optical depth and particulate nitrogen levels
Sarma, V.V.S.S.; Sridevi, B.; Kumar, Ashwini; Bikkina, S.; Kumari, V.R.; Bikkina, P.; Yadav, K.; Rao, V.D. (The Royal Society of Chemistry, 2022)Aerosols are one of the significant external sources of soluble reactive nitrogen to the surface ocean and their deposition affects the primary productivity.Owing to rapid industrialization over South and Southeast Asia, ... -
Impact of eddies on dissolved inorganic carbon components in the Bay of Bengal
Sarma, V.V.S.S.; SampathKumar, G.; Yadav, K.; Dalabehera, H.B.; Rao, D.N.; Behera, S.; Jagadeesan, L. (2019)To examine the influence of anticyclonic (ACE) and cyclonic (CE) eddies on variations in hydrographic properties and total inorganic carbon system (CT), a study was conducted in the western Bay of Bengal (BoB). The depth ... -
Implications of Microbial Thiosulfate Utilization in Red Clay Sediments of the Central Indian Basin: The Martian Analogy
Singh, Tanya; Kshirsagar, P.R.; Das, A.; Yadav, K.; Mallik, S.; Mascarenhas-Pereira, M.B.L.; Thomas, T.R.A.; Mamatha, S.S.; LokaBharathi, P.A.; Khadge, N.H.; Nath, B.N.; Dhakephalkar, P.K.; Iyer, S.D.; Ray, D.; Valsangkar, A.B.; Garg, A.; PrakashBabu, C.; Waghole, R.J.; Waghmare, S.S.; Rajwade, J.M.; Paknikar, K.M. (John Wiley & Sons, 2019)Microbial thiosulfate utilization and S-disproportionation could be important mechanisms of sulfate-formations on Earth and Mars. Sulfates on Mars date back to late-Noachian to Hesperian period. In contrast, the large ... -
Influence of atmospheric dry deposition of inorganic nutrients on phytoplankton biomass in the coastal Bay of Bengal
Yadav, K.; Sarma, V.V.S.S.; Rao, D.B.; DileepKumar, M. (Elsevier, 2016)The aerosols from continents contain relatively higher amounts of inorganic nutrients than those of marine origin and can make a notable contribution to the coastal biological productivity. To test this hypothesis, the ... -
Organic Nutrients Support High Primary Production in the Bay of Bengal
Sarma, V.V.S.S.; Rao, D.N.; Rajula, G.R.; Dalabehera, H.B.; Yadav, K. (2019)The Bay of Bengal (BoB) is known to experience low productivity but high sinking carbon fluxes to the bottom, and this paradox is attributed to mineral ballast of organic matter. We found for the first time that primary ... -
Phosphate removal through adsorption on suspended matter in the Bay of Bengal: Possible implications to primary production
Rao, D.N.; Ghosh, V.R.D.; Sam, P.; Yadav, K.; Sarma, V.V.S.S. (Springer, 2021)Low primary production in the Bay of Bengal (BoB) could not be explained as this region receives nutrients from atmospheric deposition, rivers, eddies, and mixing due to depression/cyclones. In addition to nutrients, BoB ... -
Role of eddies on intensity of oxygen minimum zone in the Bay of Bengal
Sarma, V.V.S.S.; Jagadeesan, L.; Dalabehera, H.B.; Rao, D.N.; Kumar, G.S.; Durgadevi, D.S.; Yadav, K.; Behera, S.; Priya, M.M.R. (Elsevier, 2018)One of the strongest oxygen minimum zones (OMZ) in the world oceans occurs in the Bay of Bengal (BoB) with no systematic trends in dissolved oxygen (DO) since past half a century. An evaluation is made here to examine the ... -
Role of eddies on organic matter production and f-ratios in the Bay of Bengal
Sarma, V.V.S.S.; Yadav, K.; Behera, S. (Elsevier, 2019)In order to examine the sources of nutrients and f-ratios in the cyclonic (CE) and anticyclonic eddy (ACE), the content and isotopic composition of carbon and nitrogen in suspended particulate organic matter (POM) were ... -
Spatial and temporal variability in concentration and characteristics of aerosols at Visakhapatnam (east) and Goa (west) coasts of India
Yadav, K.; Sarma, V.V.S.S.; DileepKumar, M. (2020)Knowledge on the variability in quantity and compositions of various size groups of aerosols is important to understand their sources and their role in biogeochemical and climate processes. Here, we studied total suspended ... -
The response of a natural phytoplankton community from the Godavari River Estuary to increasing CO2 concentration during the pre-monsoon period
Biswas, H.; Cros, A.; Yadav, K.; Ramana, V.V.; Prasad, V.R.; Acharyya, T.; Babu, P.V.R. (Elsevier, 2011)The effects of increasing CO sub(2) concentrations on a natural phytoplankton assemblage in a tropical estuary (Godavari, India) is reported. Two short-term (5-day) bottle experiments were conducted (with and without ...