Ravi Bhushan Present Position : Scientist SG E-mail: [email protected] Telephone: +91-79-26314964/ 4304

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Research Interests

• Accelerator Mass Spectrometer (AMS) and its applications.
• Cosmogenic Radionuclide application in Earth & Planetary Sciences.
• Ocean circulation and air-sea exchange studies using radiocarbon.
• Radicarbon dating of archeological, geological and marine samples.
• Paleoclimatic and paleoenvirontmental studies using lake and marine sediments.

Current Research Activities

• AMS Radiocarbon Dating, ¹⁰Be and ²⁶Al applications.
• Chemical and Isotopic Oceanography
• GEOTRACES: Studies of Trace elements and their isotopes in water column and sediments from the Indian Ocean
• Paleoclimatic studies from the Northern Indian Ocean.
• High Resolution studies of climate and ocean variability during modern times to past thousand years using corals and sediments from lake and marine environment.

Laboratory Facilities

• Accelerator Mass Spectrometer (AMS)
• Elemental Analyser
• Coulometer
• TOC Analyser
• HPGE Gamma Detector
• Graphitization System
• Spectrophotometer

Awards

• Fellow: Geological Society of India
• Fellow: The Society of Earth Scientists
• Visiting Professor: AORI, University of Tokyo, Oct-Nov,2010

Memberships of Associations:

• Member, American Geophyiscal Union
• Member, Indian Acedemy of Sciences
• Life Member, Indian Meterological Society (Ahmedabad Chapter)
• Life Member, Indian Society for Mass Spectrometry
• Member, Geological Society of India
• Member, The Society of Earth Scientists

Selected Publications

• Bhushan, R., Dutta. K., Agnihotri, R., Rengarajan, R., and Singh, Satinder Pal., "Decadal variations in oceanic properties of the Arabian Sea water column since GEOSECS", Radiocarbon, v.56, issue 1, pp. 313-325, 2014.
• Singh, Satinder Pal., Singh, S. K. and Bhushan, R., "Internal cycling of dissolved barrium in water column of the Bay of Bengal", Marine Chemistry 154, 12-23, 2013.
• Dutta, K. and Bhushan, R., "Radiocarbon in the Northern Indian Ocean two decades after GEOSECS", Global Biogeochemical Cycles, v. 26, GB2018, 2012.
• Singh, Satinder Pal., Singh, S. K., Goswami, V.,Bhushan, R. and Rai, V. K., "Spatial distribution of dissolved neodymium and E_Nd in the Bay of Bengal: Role of particulate matter and mixing of water masses", Geochimica et Cosmochimica Acta, v.94, pp.38-56, 2012.
• Goswami, V., Singh, S. K., Bhushan, R. and Rai, V. K., "Temporal variations in ⁸⁷Sr/⁸⁶Sr and E_Nd in sediments of the southeastern Arabian Sea: Impact of monsoon and surface water circulation", Geochemistry Geophysics Geosystems, v.13, Q01001, 2012.
• Bhushan, R., Dutta, K. and Somayajulu, B. L.K., "Estimates of Upwelling rates in the Arabian Sea and the Equatorial Indian Ocean based on bomb radiocarbon ", J. Environmental Radioactivity, v.99, pp. 1566-1571, 2008.
• Dutta, K., Bhushan, R., and Somayajulu, B.L.K., "Rapid vertical mixing in deep waters of the Andaman Basin", The Science of the Total Environment, v.384, pp.401-408, 2007.
• Juyal, N., Chamyal, L.S., Bhandari, S., Bhushan, R., and Singhvi, A. K., "Continental records of the southwest monsoon during the last 130ka: Evidence from the southern margin of the Thar Desert, India", Quaternary Science Reviews, v.25, pp. 2632-2650, 2006.
• Bhushan, R., Dutta, K., Mulsow, S., Povinec, P. P. and Somayajulu, B.L.K., "Distribution of natural and man-made radionuclides during reoccupation of GEOSECS Stations 413 and 416 in the Arabian Sea: Temporal change",Deep Sea Research II, v.50, pp. 2777-2784, 2003.
• Agnihotri, R., Dutta, K., Bhushan, R., and Somayajulu, B.L.K., "Evidence for Solar forcing on Indian monsoon during the last millennium", Earth and Planet Sci. Lett., v. 198, pp.521-527, 2002.
• Dutta, K.,Bhushan, R., and Somayajulu, B.L.K., "Delta-R-correction values for the Northern Indian Ocean", Radiocarbon, v. 43,issue. 2, pp. 483-488, 2001.
• Bhushan, R., Dutta, K. and Somayajulu, B.L.K., "Burial fluxes of organic and inorganic carbon during the past century on the eastern margins of the Arabian Sea", Marine Geology, v.178, pp. 95-113, 2001.
• Bhushan, R., Somayajulu, B.L.K., Chakraborty, S. and Krishnaswami, S., "Radiocarbon measurements in the Arabian Sea water column: Temporal variations since two decades after GEOSECS and CO₂ air-sea exchange rates", J. Geophysics Res., v.105 (C6), pp. 14273-14282, 2000.
• Somayajulu, B.L.K., Bhushan, R., Sarkar, Ashish., Burr, G. S., and Jull, A.J. T.,"Sediment deposition rates on the continental margins of the eastern Arabian Sea using ²¹⁰Pb, ¹³⁷Cs and ¹⁴C", The Science of the Total Environment, v.237/238, pp. 429, 1999.
• Somayajulu, B.L.K., Bhushan, R., Krishnaswami, S. and Narvekar, P. V., "Delta-¹⁴C, Sigma-CO₂ and salinity of the Western Indian Ocean Deep Waters: Spatial and Temporal Variation", Geophysics Res. Lett., v. 26, Issue. 18, pp. 2869-2872, 1999.
• Krishnaswami, S., Bhushan, R., and Bhaskaran, M., "Radium isotopes and Rn-22 in shallow brines, Kharaghoda (India)", Chem. Geol.(Isotope Geoscience Section), v. 87, pp. 125-136, 1991.