EDUCATION
- Ph.D., (Oceanography), Indian Institute of Science, 1996
- M.Sc.[Engg.], (Oceanography), Indian Institute of Science, 1992.
Journal Publication
- Kottapalli, A & Vinayachandran, P. N. (2025): Equatorial convection controls boreal summer intraseasonal oscillations in the present and future climates. npj | Climate and Atmospheric Science, https://doi.org/10.1038/s41612-025-00959-4.
- Nayak, A. A., N. Vinayachandran, and J.V. George, Arabian Sea high salinity core supplies oxygen to the Bay of Bengal. Deep-Sea Research Part II (2025), doi: https://doi.org/10.1016/j.dsr2.2025.105477
- Font, E., Swart, S., Vinayachandran, P. N., and Queste, B. Y. (2025), On Mode Water formation and erosion in the Arabian Sea: Forcing mechanisms, regionality, and seasonality, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2025-468.
- Bijit K. Kalita, P.N. Vinayachandran (2025), Bay of Bengal river plume response to a tropical cyclone in high-resolution numerical simulations, Ocean Modelling, 194, 102498, ISSN 1463-5003, https://doi.org/10.1016/j.ocemod.2025.102498.
- Pargaonkar, S. M., Mallick, S. K., Kalita, B. K., & Vinayachandran, P. N. (2025). Submesoscale processes associated with the East India Coastal Current. Journal of Geophysical Research: Oceans, 130, e2023JC020451. https://doi.org/10.1029/2023JC020451.
- Mayur Gachake, Anoop A. Nayak, P. Amol, P.N. Vinayachandran (2025), Microstructures along the Indian west-coast continental shelf: layering and vertical mixing, Continental Shelf Research, 285, 105360, ISSN 0278-4343, https://doi.org/10.1016/j.csr.2024.105360.
- Jain, T., Singh, U., Singh, V., Boda, V.K., Hotz, I., Vadhiyar, S.S., Vinayachandran, P.N. and Natarajan, V. (2025), A Scalable System for Visual Analysis of Ocean Data. Computer Graphics Forum e15279. https://doi.org/10.1111/cgf.15279.
- Sajidh, C. K., Chatterjee, A., Murtugudde, R., McPhaden, M., Shenoi, S. S., & Vinayachandran, P. N. (2025): Rapid 21st century warming in the Southern Indian Ocean driven by altered inter-basin connections (submitted)
- Phillips, H. E., Menezes, V. V., Nagura, M., McPhaden, M. J., Vinayachandran, P. N., & Beal, L. M. (2024): Indian Ocean circulation. In The Indian Ocean and its Role in the Global Climate System, 169-203, Elsevier, https://doi.org/10.1016/B978-0-12-822698-8.00012-3 .
- Nayak, Anoop, A., Vinayachandran, N., & George, J.V. (2024): Arabian Sea High Salinity Core Supplies Oxygen to Bay of Bengal Oxygen Minimum Zone.” ArXiv, 2024, /abs/2406.10571.
- Roy, R., Vinayachandran, P. N., George, J., Sarkar, A., & Parida, C. (2024): Subsurface mixing and ventilation of oxygen minimum zone waters in the southern Bay of Bengal during the summer monsoon, doi:http://dx.doi.org/10.21203/rs.3.rs-3790094/v1.
- Lachkar, Z., Cornejo-D’Ottone, M., Singh, A., Arístegui, J., Dewitte, B., Fawcett, S., Garçon, V., Lovecchio, E., Molina, V. and Vinayachandran, P. N. (2024): Biogeochemistry of greenhouse gases in coastal upwelling systems: processes and sensitivity to global change. Elementa: Science of the Anthropocene, 12(1),(https://online.ucpress.edu/elementa).
- Singh, U., Vinayachandran, P. N., & Natarajan, V. (2024): Advection-based tracking and analysis of salinity movement in the Indian Ocean. Computers & Geosciences, 182, 105493, https://doi.org/10.1016/j.cageo.2023.105493.
- Sheehan, P. M., Matthews, A. J., Webber, B. G., Sanchez-Franks, A., Klingaman, N. P. & Vinayachandran, P. N. (2023): On the Influence of the Bay of Bengal’s Sea Surface Temperature Gradients on Rainfall of the South Asian Monsoon. Journal of Climate, 36, 6499–6513, https://doi.org/10.1175/JCLI-D-22-0288.1.
- Prasanth R., Vijith,V., & Vinayachandran, P. N. (2023): Formation, maintenance and diurnal variability of subsurface chlorophyll maximum during the summer monsoon in the southern Bay of Bengal. Progress in Oceanography, 212, https://doi.org/10.1016/j.pocean.2023.102974.
- Kottapalli A. & Vinayachandran P. N. (2023): A possible feedback between dynamics and thermodynamics through the background moisture in dictating the ISO rainfall over the Bay of Bengal, Climate Dynamics,62(1), 123-140, https://doi.org/10.1007/s00382-023-06897-2.
- Sreedevi P. V., & Vinayachandran, N. (2023): Intraseasonal oscillations of the Andaman Sea thermocline. Deep Sea Research II, 212, 105337, https://doi.org/10.1016/j.dsr2.2023.105337.
- Kottapalli A. & Vinayachandran P. N. (2022): On the weakening of northward propagation of intraseasonal oscillations during positive Indian Ocean Dipole events, Climate Dynamics, 59(3), 915-938, https://doi.org/10.1007/s00382-022-06164-w.
- Pargaonkar S. M., & Vinayachandran N. (2022): The Irrawaddy River Jet in the Andaman Sea During the Summer Monsoon. Frontiers in Marine Science, 9, 849179., https://doi.org/10.3389/fmars.2022.849179.
- Steiner, Z., Landing, W. M., Bohlin, M. S., Greaves, M., Prakash, S., Vinayachandran, P. N., & Achterberg, E. P. (2022): Variability in the Concentration of Lithium in the Indo‐Pacific Ocean. Global Biogeochemical Cycles, 36(6), e2021GB007184, https://doi.org/10.1029/2021GB007184.
- Nayak A. N, Vinayachandran P. N., & George, J.V. (2022): Turbulent dissipation rates across the Summer Monsoon Current. Ocean Dynamics, 72(9), 695-714, https://doi.org/10.1007/s10236-022-01524-w.
- Bharti, D. K., Guizien, K., Aswathi‐Das, M. T., Vinayachandran, P. N., & Shanker, K. (2022): Connectivity networks and delineation of disconnected coastal provinces along the Indian coastline using large‐scale Lagrangian transport simulations. Limnology and Oceanography, 67(6), 1416-1428, https://doi.org/10.1002/lno.12092.
- Parida, C., Lotliker, A. A., Roy, R., & Vinayachandran, P. N. (2022): Radiant heating rate associated with chlorophyll dynamics in upper ocean of Southern Bay of Bengal: A case study during Bay of Bengal Boundary Layer Experiment. Deep Sea Research Part II: Topical Studies in Oceanography, 196, 105026, https://doi.org/10.1016/j.dsr2.2022.105026.
- Bharti, D. K., Guizien, K., Aswathi‐Das, M. T., Vinayachandran, P. N., & Shanker, K. (2022): Connectivity networks and delineation of disconnected coastal provinces along the Indian coastline using large‐scale Lagrangian transport simulations. Limnology and Oceanography, 67(6), 1416-1428, https://doi.org/10.1002/lno.12092 .
- Chatterjee, A., Sajidh, C. K., Murtugudde, R., Vinayachandran, P. N., & Shenoi, S. S. C. (2022): Rapid 21 st century warming of the Indian Ocean is forced by the Southern Ocean, Preprints. Earth and Space Science Open Archive, https://doi.org/10.1002/essoar.10503430.1.
- Vinayachandran P. N., Masumoto, Y., Roberts, M. J., Huggett, J. A., Halo, I., Chatterjee,A., Amol, P., Gupta, G. V. M., Singh, A., Mukherjee, A., Prakash, S., Beckley, L. E., Raes, E. J., & Hood , R. (2021): Reviews and syntheses: Physical and biogeochemical processes associated with upwelling in the Indian Ocean. Biogeosciences, 18, 5967–6029, https://doi.org/10.5194/bg-18-5967-2021.
- Roy R., Vinayachandran, N., Sarkar, A., George, J., Parida, C., Lotliker, A., Prakash, P., & Choudhury, S. B. (2021): Southern Bay of Bengal: A possible hotspot for CO2 emission during the summer monsoon. Progress in Oceanography, 197, 102638, ISSN 0079-6611, https://doi.org/10.1016/j.pocean.2021.102638.
- Jain V, Shankar, D., Vinayachandran, N., Mukherjee, & A., Amol. P. (2021): Role of ocean dynamics in the evolution of mixed-layer temperature in the Bay of Bengal during the summer monsoon. Ocean Modelling 168, 101895, https://doi.org/10.1016/j.ocemod.2021.101895.
- Gadi, R., Vinayachandran, N., & Subramani, D. N. (2021): Data-driven feature-oriented modeling of Southwest Monsoon Current. Ocean Modelling, 168, 101912, https://doi.org/10.1016/j.ocemod.2021.101912.
- Pargaonkar, S. M., & Vinayachandran, P. N. (2021): Wind forcing of the Ganga-Brahmaputra river plume. Ocean Dynamics, 71, 125–156, https://doi.org/10.1007/s10236-020-01429-6.
- Prasanth, R., Vijith, V., Thushara, V., George, J. V., & Vinayachandran, P. N. (2021): Processes governing the seasonality of vertical chlorophyll-a distribution in the central Arabian Sea: Bio-Argo observations and ecosystem model simulation. Deep Sea Research Part II: Topical Studies in Oceanography, 183, 104926, https://doi.org/10.1016/j.dsr2.2021.104926.
- George, J. V., Vinayachandran, P. N., & Nayak, A. A. (2021): Enhanced double-diffusive salt flux from the high-salinity core of Arabian Sea origin waters to the Bay of Bengal. Journal of Physical Oceanography, 51(2), 505-518, https://doi.org/10.1175/JPO-D-20-0192.1
- Singh U, Dhipu, T.M., Vinayachandran, N., & Natarajan, V. (2021): Front and skeleton features based methods for tracking salinity propagation in the ocean. Computers & Geosciences, 159, 104993, ISSN 0098-3004, https://doi.org/10.1016/j.cageo.2021.104993.
- Steiner Z., Sarkar A., Liu, X., Berelson, W. M,. Adkins, J. F., Achterberg, E. P, Sabu P., Prakash, S., Vinaychandran P.N., Byrne, R.H, & Turchyn, A. V. (2021): On calcium-to-alkalinity anomalies in the North Pacific, Red Sea, Indian Ocean and Southern Ocean. Geochimica et Cosmochimica Acta, 303, 1-14, ISSN 0016-7037,https://doi.org/10.1016/j.gca.2021.03.027.
- Pargaonkar, S. M., & Vinayachandran, P. N. (2021): Wind forcing of the Ganga-Brahmaputra river plume. Ocean Dynamics, 71(2), 125-156, https://doi.org/10.1007/s10236-020-01429-6.
- Giddings, J., Heywood, K. J., Matthews, A. J., Joshi, M. M., Webber, B. G., Sanchez-Franks, A., King, B. A. & Vinayachandran, P.N. (2021): Spatial and temporal variability of solar penetration depths in the Bay of Bengal and its impact on sea surface temperature (SST) during the summer monsoon. Ocean Science, 17(4), 871-890, https://doi.org/10.5194/os-17-871-2021.
- Thushara V., & Vinayachandran, P. N. (2020): Unprecedented Surface Chlorophyll Blooms in the Southeastern Arabian Sea During an Extreme Negative Indian Ocean Dipole, 47(13), e2019GL085026. Geophysical Research Letter,. https://doi.org/10.1029/2019GL085026.
- Vijith, V., Vinayachandran, P. N., Webber, B. G. M., Mathews,A. J., George, J. V. , Kannaujia, V. K., Lotliker, A. A., Amol, P. (2020): Closing the sea surface mixed layer temperature budget from in situ observations alone: Operation Advection during BoBBLE. Scientific reports, 10(1), 7062, https://doi.org/10.1038/s41598-020-63320-0.
- Vinayachandran, P. N., Das, U., Shankar, D., Jahfer, S., Behara, A., Nair, T. B., & Bhat, G. S. (2020): Maintenance of the southern Bay of Bengal cold pool. Deep Sea Research Part II: Topical Studies in Oceanography, 179, 104624, https://doi.org/10.1016/j.dsr2.2019.07.012.
- Amol, P., Vinayachandran, P. N., Shankar, D., Thushara, V., Vijith, V., Chatterjee, A., & Kankonkar, A. (2020): Effect of freshwater advection and winds on the vertical structure of chlorophyll in the northern Bay of Bengal. Deep Sea Research Part II: Topical Studies in Oceanography, 179, 104622, https://doi.org/10.1016/j.dsr2.2019.07.010.
- Francis, P. A., Jithin,A. K., Effy, J. B., Chatterjee, A., Chakraborty, K., Paul, A., Balaji, B., Shenoi, S. S. C., Biswamoy, P., Mukherjee, A., Singh, P., Deepsankar, B., Reddy, S., Vinayachandran, N., Girish Kumar, M. S., Udaya Bhaskar, T. V. S., Ravichandran, M., Unnikrishnan,A. S., Shankar, D., Prakash, A., Aparna, S. G., Harikumar, R., Kaviyazhahu, K., Suprit, K., Shesu, R. V. , Kiran Kumar,N., Srinivasa Rao,N., Annapurnaiah, K., Venkatesan, R., Rao, A. S., Rajagopal, E. N., Prasad, V. S., Gupta, M. D., Balakrishnan Nair, T. M., Rao, E. P. R., & Satyanarayana, B. V. (2020): High-Resolution Operational Ocean Forecast and Reanalysis System for the Indian Ocean. Bulletin of the American Meteorological Society, 101(8), pp.E1340-E1356, https://doi.org/10.1175/BAMS-D-19-0083.1.
- Francis, P.A., Jithin, A.K., Chatterjee, A. Mukherjee, Shankar, Vinayachandran, P. N. & Ramakrishna, S.S.V.S. (2020): Structure and dynamics of undercurrents in the western boundary current of the Bay of Bengal. Ocean Dynamics, 70, 387–404. https://doi.org/10.1007/s10236-019-01340-9.
- Amol, P., Bemal, S., Shankar, D., Jain, V., Thushara, V., Vijith, V., & Vinayachandran, P. N. (2020): Modulation of chlorophyll concentration by downwelling Rossby waves during the winter monsoon in the southeastern Arabian Sea. Progress in Oceanography, 186, 102365., https://doi.org/10.1016/j.pocean.2020.102365.
- Sheehan, P. M., Webber, B. G., Sanchez‐Franks, A., Matthews, A. J., Heywood, K. J., & Vinayachandran, P. N. (2020): Injection of oxygenated Persian Gulf Water into the southern Bay of Bengal. Geophysical Research Letters, 47(14), e2020GL087773, https://doi.org/10.1029/2020GL087773
- Steiner, Z., Sarkar, A., Prakash, S., Vinaychandran, P. N., & Turchyn, A. V. (2020): Dissolved strontium, Sr/Ca ratios, and the abundance of Acantharia in the Indian and Southern Oceans. ACS Earth and Space Chemistry, 4(6), 802-811., https://doi.org/10.1021/acsearthspacechem.9b00281.
- Jahfer, S., Vinayachandran, P. N., & Nanjundiah, R. S. (2020): The role of Amazon river runoff on the multidecadal variability of the Atlantic ITCZ. Environmental Research Letters, 15(5), 054013., https://doi.org/10.1088/1748-9326/ab7c8a.
- Vinayachandran, P. N., Das, U., Shankar, D., Jahfer, S., Behara, A., Nair, T. B., & Bhat, G. S. (2020): Maintenance of the southern Bay of Bengal cold pool. Deep Sea Research Part II: Topical Studies in Oceanography, 179, 104624, https://doi.org/10.1016/j.dsr2.2019.07.012.
- Amol, P., Vinayachandran, P. N., Shankar, D., Thushara, V., Vijith, V., Chatterjee, A., & Kankonkar, A. (2020): Effect of freshwater advection and winds on the vertical structure of chlorophyll in the northern Bay of Bengal. Deep Sea Research Part II: Topical Studies in Oceanography, 179, 104622, https://doi.org/10.1016/j.dsr2.2019.07.010.
- Vinayachandran, P. N., Davidson, F., & Chassignet, E. P. (2020): Toward Joint Assessments, Modern Capabilities, and New Links for Ocean Prediction Systems. Bulletin of the American Meteorological Society, 101(4), E485-E487, https://doi.org/10.1175/BAMS-D-19-0276.1
- Rath, S., Vinayachandran, P. N., Behara, A., & Neema, C. P. (2019): Dynamics of summer monsoon current around Sri Lanka. Ocean Dynamics, 69, 1133-1154, https://doi.org/10.1007/s10236-019-01295-x.
- George, J. V., Vinayachandran, P. N., Vijith, V., Thushara, V., Nayak, A. A., Pargaonkar, S. M., … & Matthews, A. J. (2019): Mechanisms of barrier layer formation and erosion from in situ observations in the Bay of Bengal. Journal of Physical Oceanography, 49(5), 1183-1200, https://doi.org/10.1175/JPO-D-18-0204.1.
- Behara, A., Vinayachandran, P. N., & Shankar, D. (2019): Influence of rainfall over eastern Arabian Sea on its salinity. Journal of Geophysical Research: Oceans, 124, https://doi.org/10.1029/2019JC014999.
- Thushara, Vinayachandran, P. N., Mathews, A. J., Webber, B. G. M., Queste, B. Y. (2019 ): Vertical distribution of chlorophyll in dynamically distinct regions of the southern Bay of Bengal. Biogeosciences, 16, 1447–1468, https://doi.org/10.5194/bg-16-1447-2019.
- Sanchez-Franks, A., Webber, B. G. M., King, B. A., Vinayachandran, P. N., Matthews, A. J., Sheehan, P. M. F., et al. (2019): The railroad switch effect of seasonally reversing currents on the Bay of Bengal high-salinity core. Geophysical Research Letters, 46, 6005–6014. https://doi.org/10.1029/2019GL082208.
- Davidson, F., Azcarate, A., Barth, A., Brassington,G. B., Chassignet, E. P., Clementi,E., Mey-Frémaux, D., Divakaran, P., Harris, C., Hernandez, F., Hogan, P., Hole, L. R., Holt, J., Liu, G., Lu, Y., Lorente, P., Maksymczuk, J., Martin, M., Mehra, A., Melsom, A., Mo, H., Moore, A., Oddo, P., Pascual, A., Pequignet, A., Kourafalou, V., Ryan,A., Siddorn, J., Smith, G., Spindler, D., Spindler, T., Stanev, E., Staneva, J., Storto, A., Tanajura, C., Vinayachandran, P. N. & others (2019): Synergies in Operational Oceanography: The Intrinsic Need or Sustained Ocean Observations. Frontiers in Marine Science, 6, https://doi.org/10.3389/fmars.2019.00450.
- Gadgil S., Francis, P. A., & Vinayachandran, N. (2019): Summer monsoon of 2019: understanding the performance so far and speculating about the rest of the season. Current Science, 117(5), 783-793, https://www.jstor.org/stable/27138342.
- Vinayachandran, N., Matthews, A. J., Kumar, K. V., Sanchez-Franks, A., Thushara, V., George, J., … & Joshi, M. (2018): BoBBLE: Ocean–atmosphere interaction and its impact on the South Asian monsoon. Bulletin of the American Meteorological Society, 99(8), 1569-1587, https://doi.org/10.1175/BAMS-D-16-0230.1.
- Sanchez-Franks, A., Kent, E. C., Matthews, A. J., Webber, B. G., Peatman, S. C., & Vinayachandran, P. N. (2018): Intraseasonal variability of air–sea fluxes over the Bay of Bengal during the southwest monsoon. Journal of Climate, 31(17), 7087-7109, https://doi.org/10.1175/JCLI-D-17-0652.1.
- Webber, B. G., Matthews, A. J., Vinayachandran, P. N., Neema, C. P., Sanchez-Franks, A., Vijith, V., … & Baranowski, D. B. (2018): The dynamics of the southwest monsoon current in 2016 from high-resolution in situ observations and models. Journal of Physical Oceanography, 48(10), 2259-2282, https://doi.org/10.1175/JPO-D-17-0215.1.
- Jyothibabu, Arunpandi, N., Jagadeesan, L., Karnan, C., Lallu, K.R., Vinayachandran, P. N. (2018): Physiological responses of phytoplankton to heavy cloud cover and turbidity in the northern Bay of Bengal. Scientific Reports, 8(1), 11282. https://doi.org/10.1038/s41598-018-29586-1.
- Martin, P., Lauro, F. M., Sarkar, A., Goodkin, N., Prakash, S., & Vinayachandran, P. N. (2018): Particulate polyphosphate and alkaline phosphatase activity across a latitudinal transect in the tropical Indian Ocean. Limnology and Oceanography, 63(3), 1395-1406., https://doi.org/10.1002/lno.10780.
- Wall-Palmer, D., Metcalfe, B., Leng, M. J., Sloane, H. J., Ganssen, G., Vinayachandran, P. N., & Smart, C. W. (2018): Vertical distribution and diurnal migration of atlantid heteropods. Marine Ecology Progress Series, 587, 1-15, http://dx.doi.org/10.3354/meps12464.
- Mukherjee, A., Shankar, D., Chatterjee, A., & Vinayachandran, P. N. (2018): Numerical simulation of the observed near-surface East India Coastal Current on the continental slope. Climate Dynamics, 50, 3949-3980, https://doi.org/10.1007/s00382-017-3856-x.
- Chatterjee, A., Shankar, D., McCreary, J. P., Vinayachandran, P. N., & Mukherjee, A. (2017): Dynamics of Andaman Sea circulation and its role in connecting the equatorial Indian Ocean to the Bay of Bengal. Journal of Geophysical Research: Oceans, 122(4), 3200-3218., https://doi.org/10.1002/2016JC012300 .
- Jahfer, S., Vinayachandran, P. N., & Nanjundiah, R. S. (2017): Long-term impact of Amazon river runoff on northern hemispheric climate. Scientific reports, 7(1), 10989., https://doi.org/10.1038/s41598-017-10750-y.
- Kashyap, Vadhiyar, S. S., Nanjundiah, R. S., & Vinayachandran, P. N. (2017): Asynchronous and Synchronous Models of Executions R Xeon Phi TM Coprocessor Systems for High on Intel Performance of Long Wave Radiation Calculations in Atmosphere models. Journal of Parrellel and Distributed Computing, 102,199-212, http://dx.doi.org/10.1016/j.jpdc.2016.12.018.
- Jain, V., Shankar, D., Vinayachandran, P. N., Kankonkar, A., Chatterjee, A., Amol, P., … & Neema, C. P. (2017): Evidence for the existence of Persian Gulf water and Red Sea water in the Bay of Bengal. Climate dynamics, 48, 3207-3226, https://doi.org/10.1007/s00382-016-3259-4.
- Behara, A., & Vinayachandran, P. N. (2016): An OGCM study of the impact of rain and river water forcing on the Bay of Bengal. Journal of Geophysical Research: Oceans, 121(4), 2425-2446, https://doi.org/10.1002/2015JC011325.
- Vijith, V., Vinayachandran, P. N., Thushara, V., Amol, P., Shankar, D., & Anil, A. C. (2016): Consequences of inhibition of mixed‐layer deepening by the West India Coastal Current for winter phytoplankton bloom in the northeastern Arabian Sea. Journal of Geophysical Research: Oceans, 121(9), 6583-6603, https://doi.org/10.1002/2016JC012004.
- Thushara, V., & Vinayachandran, P. N. (2016): Formation of summer phytoplankton bloom in the northwestern B ay of B engal in a coupled physical‐ecosystem model. Journal of Geophysical Research: Oceans, 121(12), 8535-8550, https://doi.org/10.1002/2016JC011987.
- Shankar, D., Remya, R., Vinayachandran, P. N., Chatterjee, A., & Behera, A. (2016): Inhibition of mixed-layer deepening during winter in the northeastern Arabian Sea by the West India Coastal Current. Climate Dynamics, 47, 1049-1072, https://doi.org/10.1007/s00382-015-2888-3.
- Das, U., Vinayachandran, P. N., & Behara, A. (2016): Formation of the southern Bay of Bengal cold pool. Climate Dynamics, 47, 2009-2023, https://doi.org/10.1007/s00382-015-2947-9.
- Vinayachandran P. N. , Jahfer, S & Nanjundiah, R. S. (2015): Impact of river runoff into the ocean on Indian Summer Monsoon. Environmental Research Letters, 10, https://doi.org/10.1088/1748-9326/10/5/054008 .
- Jyothibabu, R., Vinayachandran, P. N., Madhu, N. V., Robin, R. S., Karnan, C., Jagadeesan, L., & Anjusha, A. (2015): Phytoplankton size structure in the southern Bay of Bengal modified by the Summer Monsoon Current and associated eddies: Implications on the vertical biogenic flux. Journal of Marine Systems, 143, 98-119, http://dx.doi.org/10.1016/j.jmarsys.2014.10.018.
- Thushara V. & Vinayachandran, P. N. (2014): Impact on diurnal forcing on intraseasonal sea surface oscillations in the Bay of Bengal. Journal of Geophysical Research: Oceans, 119, https://doi.org/10.1012/2013JC009746.
- Nurujjaman, M., Apte, A., & Vinayachandran, P. N. (2013): Data assimilation using ensemble transform Kalman filter (ETKF) in ROMS model for Indian Ocean. The European Physical Journal Special Topics, 222(3), 875-883, https://doi.org/10.1140/epjst/e2013-01890-3.
- Vinayachandran P. N. , Shankar, D., Vernekar, S., Sandeep, K. K., Amol, P., Neema, C. P., & Chatterjee, A. (2013): A summer monsoon pump to keep the Bay of Bengal salty. Geophysical Research Letters, 40(9), 1777-1782, https://doi.org/1002/grl.50274.
- Chatterjee, A., Shankar, D., McCreary Jr, J. P., & Vinayachandran, P. N. (2013): Yanai waves in the western equatorial Indian Ocean. Journal of Geophysical Research: Oceans, 118(3), 1556-1570, https://doi.org/1002/jgrc.20121 .
- McCreary Jr, J. P., Yu, Z., Hood, R. R., Vinaychandran, P. N., Furue, R., Ishida, A., & Richards, K. J. (2013): Dynamics of the Indian-Ocean oxygen minimum zones. Progress in Oceanography, 112, 15-37, https://doi.org/10.1016/j.pocean.2013.03.002.
- Francis, P. A., Vinayachandran, P. N., & Shenoi, S. S. C. (2013): The Indian ocean forecast system. Current Science, 104(10), 1354-1368., https://www.jstor.org/stable/24092510.
- Aparna, S. G., McCreary, J. P., Shankar, D., & Vinayachandran, P. N. (2012): Signatures of Indian Ocean Dipole and El Niño–Southern Oscillation events in sea level variations in the Bay of Bengal. Journal of Geophysical Research: Oceans, 117(C10), https://doi.org/1029/2012JC008055.
- Vinayachandran, P. N., Neema, C. P., Mathew, S., & Remya, R. (2012): Mechanisms of summer intraseasonal sea surface temperature oscillations in the Bay of Bengal. Journal of Geophysical Research, 117, C01005, https://doi.org/1029/2011JC007433 .
- Lee, S. S., Vinayachandran, P. N., Ha, K. J., & Jhun, J. G. (2010): Shift of peak in summer monsoon rainfall over Korea and its association with El Niño–Southern Oscillation. Journal of Geophysical Research: Atmospheres, 115(D2), https://doi.org/1029/2009JD011717.
- Vinayachandran P. N. & Nanjundiah, R. S. (2009): Indian Ocean sea surface salinity variations in a coupled model. Climate Dynamics, 33, 245-263, https://doi.org/1007/s00382-008-0511-6 .
- Vinayachandran P. N. & Saji, N. H. (2008): Mechanisms of south Indian Ocean intraseasonal cooling. Geophysical Research Letters, 35, L23607, https://doi.org/1029/2008GL035733 .
- Tangang, F. T., Juneng, L., Salimun, E., Vinayachandran, P. N., Seng, Y. K., Reason, C. J. C., … & Yasunari, T. (2008): On the roles of the northeast cold surge, the Borneo vortex, the Madden‐Julian Oscillation, and the Indian Ocean Dipole during the extreme 2006/2007 flood in southern Peninsular Malaysia. Geophysical Research Letters, 35(14), https://doi.org/1029/2008GL033539.
- Al Saafani, M. A., Shenoi, S. S. C., Shankar, D., Aparna, M., Kurian, J., Durand, F., & Vinayachandran, P. N. (2007): Westward movement of eddies into the Gulf of Aden from the Arabian Sea. Journal of Geophysical Research: Oceans, 112(C11), https://doi.org/10.1029/2006JC004020.
- Vinayachandran P. N., Kurian, J., & Neema, C. P. (2007): Indian Ocean response to anomalous conditions during 2006. Geophysical Research Letters, 34, https://doi.org/10.1029/2007GL030194 .
- Vinayachandran P. N. & Kurian, J. (2007): Hydrographic observations and model simulations of the Bay of Bengal freshwater plume. Deep Sea Research I, 54, https://doi.org/10.1016/j.dsr.2007.01.007.
- Vinayachandran, P. N., Shankar, D., Kurian, J., Durand, F., & Shenoi, S. S. C. (2007): Arabian Sea mini warm pool and the monsoon onset vortex. Current Science, 93(2), 203-214, https://www.jstor.org/stable/24099306.
- Kurian, J. & Vinayachandran, N. (2007): Mechanisms of formation of Arabian Sea mini warm pool in a high resolution OGCM. Journal of Geophysical Research, 112, https://doi.org/10.1029/2006JC003631 .
- Francis, P. A., Gadgil, S., & Vinayachandran, P. N. (2007): Triggering of the positive Indian Ocean dipole events by severe cyclones over the Bay of Bengal. Tellus A: Dynamic Meteorology and Oceanography, 59(4), 461-475, https://doi.org/10.1111/j.1600-0870.2007.00254.x.
- Kurian J. & Vinayachandran, N. (2006): Formation mechanisms of temperature inversions in the southeastern Arabian Sea. Geophysical Research Letters, 33 (17), https://doi.org/10.1029/2006GL027280 .
- Janakiraman S., R. S. Nanjundiah & Vinayachandran, N. (2005): Simulations of the Indian summer monsoon with a coupled ocean-atmosphere model on PARAM Padma. Current Science, 89(9), 1555-1562, https://www.jstor.org/stable/24110930.
- Vinayachandran P. N., McCreary Jr, J. P., Hood, R. R., & Kohler, K. E. (2005): A numerical investigation of the phytoplankton bloom in the Bay of Bengal during Northeast Monsoon. Journal of Geophysical Research: Oceans, 110(C12), https://doi.org/10.1029/2005JC002966 .
- Vinayachandran P. N., Kagimoto, T., Masumoto, Y., Chauhan, P., Nayak, S. R., & Yamagata, T. (2005): Bifurcation of the East India coastal current east of Sri Lanka. Geophysical Research Letters, 32(15), https://doi.org/10.1029/2005GL022864.
- Shankar, D., Shenoi, S. S. C., Nayak, R. K., Vinayachandran, P. N., Nampoothiri, G., Almeida, A. M., … & Sreejith, O. P. (2005): Hydrography of the eastern Arabian Sea during summer monsoon 2002. Journal of earth system science, 114, 459-474, https://doi.org/10.1007/BF02702023 .
- Ravichandran, M., Vinayachandran, P. N., Joseph, S., & Radhakrishnan, K. (2004): Results from the first Argo float deployed by India. Current Science, 86(5), 651-659.
- Vinayachandran P. N., (2004): Summer cooling of the Arabian Sea during contrasting monsoons. Geophysical Research Letters, 31, https://doi.org/10.1029/2004GL019961 .
- Vinayachandran P. N., Chauhan, P., Mohan, M., & Nayak, S. (2004): Biological response of the sea around Sri Lanka to summer monsoon. Geophysical Research Letters, 31(1), doi:10.1029 /2003GL018533.
- Gadgil S., Vinayachandran, N. , Francis,P. A. & Gadgil, S. (2004): Extremes of Indian Monsoon rainfall, ENSO and equatorial Indian Ocean Oscillation, Geophysical Research Letters, 31, https://doi.org/10.1029/2004GL019733 .
- Vinayachandran P. N. & Mathew, S. (2003): Phytoplankton bloom in the Bay of Bengal during northeast monsoon and its intensification by cyclones. Geophysical Research Letters, 30(11), https://doi.org/10.1029/2002GL016717 .
- Gadgil S., Vinayachandran, P. N. & Francis, P. A. (2003): Droughts of Indian summer monsoon: Role of clouds over the Indian Ocean. Current Science, 85, 1713-1719, https://www.jstor.org/stable/24109976.
- Vinayachandran P. N. & Yamagata, T. (2003): Comment on “Indian Ocean: Validation of the MICOM and ENSO events during 1958-1998 by Haugen et al.”. Journal Geophysical. Research:Oceans, 108(C6), https://doi.org/1029/2002JC001624 .
- Vinayachandran P. N., Murty,V. S. N., & Ramesh Babu, V. (2002): Observations of barrier layer formation in the Bay of Bengal during summer monsoon. Journal Geophysical Research:Oceans, 107(C12), https://doi.org/10.1029/2001JC000831 .
- Vinayachandran P. N., Iizuka, S., & Yamagata, T. (2002): Indian Ocean dipole mode events in an ocean general circulation model. Deep Sea Research Part II: Topical Studies in Oceanography, 49(7-8), 1573-1596, https://doi.org/10.1016/S0967-0645(01)00157-6.
- Shankar, D., Vinayachandran, P. N., & Unnikrishnan, A. S. (2002): The monsoon currents in the north Indian Ocean. Progress in oceanography, 52(1), 63-120, https://doi.org/10.1016/S0079-6611(02)00024-1.
- Bhat, G. S., Gadgil, S., Kumar, P. H., Kalsi, S. R., Madhusoodanan, P., Murty, V. S. N., … & Vinayachandran, P. N. (2001): BOBMEX: The Bay of Bengal monsoon experiment. Bulletin of the American Meteorological Society, 82(10), 2217-2244, https://doi.org/10.1175/1520-0477(2001)082%3C2217:BTBOBM%3E2.3.CO;2.
- Saji, N. H., Goswami, B. N., Vinayachandran, P. N., & Yamagata, T. (1999): A dipole mode in the tropical Indian Ocean. Nature, 401(6751), 360-363, https://doi.org/10.1038/43854.
- Vinayachandran P. N., Saji, N. H., & Yamagata, T. (1999): Response of the equatorial Indian Ocean to an unusual wind event during 1994. Geophysical Research Letters, 26(11), 1613-1616, https://doi.org/10.1029/1999GL900179.
- Vinayachandran P. N., Masumoto, Y., Mikawa, T., & Yamagata, T. (1999): Intrusion of the southwest monsoon current into the Bay of Bengal. Journal of Geophysical Research: Oceans, 104(C5), 11077-11085, https://doi.org/10.1029/1999JC900035 .
- Vinayachandran P. N. & Yamagata, T. (1998): Monsoon response of the sea around Sri Lanka: generation of thermal domes and anticyclonic vortices. Journal of Physical Oceanography, 28(10), 1946-1960, https://doi.org/10.1175/1520-0485(1998)028%3C1946:MROTSA%3E2.0.CO;2.
- Vinayachandran P. N., Shetye,S. R., Sengupta, D., & Gadgil, S. (1996): Forcing mechanisms of the Bay of Bengal circulation, Current Science, 71, 753-763.
- Shetye, S. R., Gouveia, A. D., Shankar, D., Shenoi, S. S. C., Vinayachandran, P. N., Sundar, D., … & Nampoothiri, G. (1996): Hydrography and circulation in the western Bay of Bengal during the northeast monsoon. Journal of Geophysical Research: Oceans, 101(C6), 14011-14025, https://doi.org/10.1029/95JC03307.
- Vinayachandran P. N., & Shetye, S. R. (1991): The warm pool in the Indian Ocean. Proceedings of the Indian Academy of Sciences-Earth and Planetary Sciences, 100, 165-175, https://doi.org/10.1007/BF02839431.
- Vinayachandran P. N. & Ramesh Kumar, M. R. (1990): Water vapour flux divergence over the Arabian Sea during 1987 summer monsoon using satellite data. Boundary Layer Meteorology, 51, 199-209, https://doi.org/10.1007/BF00120468.
- Vinayachandran P. N., Sadhuram, Y., & Babu, V. R. (1989): Latent and sensible heat fluxes under active and weak phases of the summer monsoon of 1986. Proceedings of the Indian Academy of Sciences-Earth and Planetary Sciences, 98, 213-222, https://doi.org/10.1007/BF02863246.
Book Edited
- “Understanding and Forecasting of Monsoons, Published by NAM S&T Centre, New Delhi, ISBN-81-7035-522-2”.
Book Chapters
- Philips, H. E., Menezes, V. V., Nagura, Motoki, McPhaden, Michael J., Vinayachandran, P. N., Beal, Lisa M., Talley & Lynne D., (2023): Indian Ocean Circulation, In “The Indian Ocean and its Role in the Global Climate System” (pp. 169-203). Elsevier. https://doi.org/10.1016/B978-0-12-822698-8.00012-3
- Vinayachandran P. N., Seng D. C. & F. A. Schimid, (2022): Climate Change and Coastal Systems, in Blue Economy: An ocean science perspective, Edited by V. Ittekkot and E. R. Urban, Springer . https://doi.org/10.1007/978-981-19-5065-0.
- Gadgil, S., Francis,P. A. and Vinayachandran, P. N. & S. (2021): Interannual variation of the Indian summer monsoon, ENSO, IOD, and EQUINOO. InIndian Summer Monsoon Variability (pp. 29-48). Elsevier. https://doi.org/10.1016/B978-0-12-822402-1.00014-4.
- Masumoto Y., Nagura, M., Miyama,T., Xie,S-P, Yu,Z., McCreary, J. P., Vinayachandran, P. N., Hood, R. R. & Guilder, H. (2015): Ocean processes relevant to climate variations in the Indo-Pacific Sector, in Indo-Pacific Climate Variability and Predictability, K.Behara and T. Yamagata (Eds), p 25-62.
- Ha, K. J., Lee, S. S., Vinayachandran, P. N., & Jhun, J. G. (2010): Changma and shifting peak in summer rainfall of Korea: ENSO influence. Atmospheric Science (AS),16, 35.
- Vinayachandran P. N., Francis, P. A., & Rao, S. A. (2009): Indian ocean dipole: Processes and Impacts, in Current Trends in Science, Platinum Jubilee Special, Indian Academy of Sciences, p569–589.
- Vinayachandran P. N., (2009): Impact of physical processes on the chlorophyll distribution in the Bay of Bengal, in “Indian Ocean Biogeochemical Processes and Ecological Variability”, Geophysical Monograph Series 185, American Geophysical Union, DOI:10.1029/2008GM000705, p71-86.
- McCreary, J. P., Murtugudde, R., Vialard, J., Vinayachandran, N., Wiggert, J. D., Hood, R. R., Shankar, D. & Shetye, S. (2009): Biophysical processes in the Indain Ocean, in “Indian Ocean Biogeochemical Processes and Ecological Variability”, Geophysical Monograph Series 185, American Geophysical Union, DOI:10.1029/2008GM000705, p9–32.
- Vinayachandran P. N., (2008): Association between Indonesian rainfall and the Indian Ocean dipole, in “Understanding and Forecasting of Monsoons, Published by NAM S&T Centre, New Delhi, ISBN-81-7035-522-2”.
Book Review:
- “The Mandovi and Zuari Estuaries”, edited by S. R. Shetye, D. Shankar and M. D. Kumar for Current Science, 2008, 94(2), pp 391.
21 March 2025
Invited Talks
- BoBBLE observations in the southern Bay of Bengal during summer monsoon, 15 February 2019, SIBER, SSC, Port Elizabeth, South Africa
- Encounters with a fascinating bay, 1 March 2019, RCPNS 2019, Chandigarh.
- Climate of the Bay of Bengal, Workshop on Climate Change, 6-7, December 2018, DCCC, IISc.
- Arabian Sea Warm Pool and the monsooon onset vortex, Indo-US workshop, 25-26 February, Hyderabad.
- “Monitoring the Oceans- World Oceans Day Lecture” 8 June 2018, Karnataka Science & Technology Academy (KSTA).
- P N Vinayachandran, BoBBLE(Bay of Bengal Boundary Layer Experiment): Exploring the ocean-atmosphere system in the southern Bay of Bengal during the summer monsoon, Key note talk. IAPSO-IAMAS-IAGA Joint Assembly to be held at Cape Town during 27th August to 01st September, 2017
- “An overview of the southern Bay of Bengal cold pool” at The national symposium on “Impact of Climate change : Successes and Challenges on Ocean and Atmospheric Research” (SCOAR 2014) , 09th -11th October 2014, Andhra University, Visakhapatnam.
- ” A summer monsoon salt pump in the Bay of Bengal”, National Workshop on Characteristics of Monsoon-Factors responsible for contrasting features, 11-12 December, 2014. CUSAT, Kochi
- Intraseasonal variations of Bay of Bengal sea surface temperature, “International symposium on climate variations”, University of Tokyo, 11-13 April 2012.
- Invited Talk “Bay of Bengal without its Freshwater”, Workshop on Sundarbans: The Bhatirdesh and its Science, Mar 27, 2012, Kolkata.
- Sensitivity of intraseasonal forcing to freshwater forcing, Workshop on physical processes in the Bay of Bengal and monsoon ISO, 5-7 March 2012, Bangalore.
- Invited Talk “Salinity effects on Intraseasonal Ossicilations”, International Workshop on Bay of Bengal processes and Monsoons, Mar 5-7, 2012, IISc, Bangalore.
- Invited Lecture “River discharge and ocean circulation”, Sao Paulo School on Global Climate Modeling, October 3-14, 2011, Sao Paulo, Brazil.
- Invited Science Talk “Physical Processes relevant to Bay of Bengal Biology”, 2nd scientific steering committee meeting, July 26-28, 2011, Chennai, India.
- “Progress and prospects in Indian Ocean modeling”, International Conference on Meta Computing, 16-17 December 2010, Goa, India.
- “High resolution Indian Ocean modeling applications”, Workshop of Modeling of Oceanic and Atmospheric Processes, Sultan Qaboos Univeristy, Oman, March 2010.
- “Indian Ocean Dipole: Processes and Impacts” at “Young Scientists of Asia Conclave, Pressing Problems of Humankind: Energy & Climate”, A conference of Concerned Young Scientists, TWAS, Bangalore, 15-17 January, 2009.
- “Indian Ocean Dipole” 96th Indian Science Congress 2009, Northeastern Hill University, Shillong, 3-7 January, 2009.
- “Modeling of the Indian Ocean: Bay of Bengal fresh water plume and the Arabian Sea mini warm pool”, The 12th Annual Congress on Fluid Mechanics, 18-21 August, 2008, Daejon, Koera.
- “Oceanic processes associated with the 2006 Indian Ocean Dipole”, Asia Oceania Geosciences Society 2008, 16-20 June, 2008, Busan, Korea.
- “The 2006 Indian Ocean Dipole and its possible influence on the circulation over Maritime Continent”, International Seminar on Climate Variability, Change and Extreme Weather Events”, 26-27 February, 2008, National University, Malaysia.
- “Oceanic processes associated with the 2006 Indian Ocean Dipole” IUGG XXIV General Assembly”, Session JPS001, 2-13 July, 2007, Perugia, Italy.
- “Modeling Indian Ocean circulation”, Celebrating the Monsoons, Indian Institute of Science, 24-27 July, 2007, Bangalore, India.
- “Association between Indonesian Rainfall and the Indian Ocean Dipole”, International Round Table on Understanding and Prediction of Summer and Winter Monsoons, 21-24 November 2005, Jakarta, Indonesia.
- “Numerical modeling of circulation and chlorophyll distribution in the Bay of Bengal”, National Workshop on Oceanographic Feature of the Indian Coastal Waters, Naval Physical & Oceanographic Laboratory, 6-7 October 2005, Kochi, India.
- “Thermal domes in the Bay of Bengal: Physics, phytoplankton blooms and implications”, IUGG XXIII General Assembly, 30 June to 11 July, 2003, Sapporo, Japan.
- “Ocean dynamics during dipole events in an OGCM”, Invited presentation, Symposium on the ocean-atmosphere coupled dynamics in the Indian Ocean, 17–21 December, 2001, Tokyo, Japan.
- “Pathways of freshwater outflow from the Bay of Bengal”, Invited presentation, WOCE Indian Ocean meeting, 19 May 1999, Miami, USA.
- “Decadal and interdecadal climate events and their impacts on the ocean circulation in the Indo-Pacific sector”, Science of Climate ’99, 21 January 1999, La Jolla, USA.
Courses Taught
- Ph.D., (Oceanography), Indian Institute of Science, 1996
- M.Sc.[Engg.], (Oceanography), Indian Institute of Science, 1992.
Projects
On-going projects
- BOBBLE: Bay of Bengal Boundary Layer Experiment, a Joint Project between MoES India and MoES, UK, 2015-2020.
- J C Bose Fellowship and Research Grant, (Prinicipal Investigator), 2018-2022.
- Development and implementation of river discharge and biogeochemical module for the global climate model setup of INCOIS, (Prinicipal Investigator) 2018-2020.
- Intel Parallel Computing Centre for Modeling Monsoons and Tropical Climate”, Intel Corporation, USA, (Co-investigator), 2014-2020.
Completed Projects
- As Principal Investigator
- Modeling physical-biological interaction in the Indian Ocean, INCOIS, Ministry of Earth Sciences, 2013-2017.
- High resolution modeling of Indian Ocean using MOM and ROMS, INCOIS, Ministry of Earth Sciences, 2008-2013
- Oceanographic observations in the southern Bay of Bengal during CTCZ, Department of Science and Technology, Govt. of India, 2009-2012.
- Development of a data assimilation system for the Indian Ocean, DOD (INCOIS), 2003-2008.
- Analysis and synthesis for the Indian Argo Programme, DOD (INCOIS), 2002-2005.
- Underwater radiation and chlorophyll measurements during CTCZ (2011-2012), 2011-2016.
- Retrieval of Ocean parameters (phytoplankton blooms), ISRO (SAC), 2004-2008.
- Interpretation of Ocean Color variability in the Bay of Bengal using an ocean general circulation model, ISRO (SAC), 2001-2003.
- Implementation of Regional Ocean Modeling System for the Indian Ocean on a Windows compute cluster, Microsoft Corporation, USA, 2008-2011.
- As co-investigator
- Common computing facility for ocean modeling at CAOS, Department of Ocean Development (INCOIS), 2003-2008, Co-investigator. (PI: Chairman, CAOS).
- Study of teleconnections and Ocean-Atmosphere coupling over Indian Region using AOGCM? INCOIS, Ministry of Earth Sciences, 2013-2017, (Co-investigator).
- Modeling Oxygen Minimum in the Arabian Sea, National Science Foundation (NSF), USA, 2007-2010, Co-investigator. (PI: Prof. Jay McCreary, IPRC, Hawaii).
- Study of Atmosphere-Ocean Interaction and its impact on ocean state over northern Indian using a coupled climate system model, Ministry of Earth Sciences, INCOIS, MoES, 2008-2013, Co-investigator. (PI: Prof. Ravi Nanjundiah, IISc).
- Assimilation of Argo data into the ROMS model of the Indian Ocean, Indian National Centre for Ocean Information Services, MoES, 2008-2011, Co-investigator (PI: Prof. Amit Apte, TIFR).
- The Indian monsoon & the coupled atmosphere – Equatorial Indian Ocean system, INCOIS, MoES, 2007-2010, Co-investigator. (PI: Prof. Sulochana Gadgil, IISc).
- Constraining the tsunami cyclicity along the southeast coast of India based on near-source (Andamans) * far-field (east coast of India) investigations, 2008-2012, Co-investigator.
- Implementation of dynamical seasonal prediction system, India Meteorological Department, 2006-2009, Co-investigator. (PI: Prof. Ravi Nanjundiah, IISc).
- Reconstruction of late quaternary tropical sea surface temperature-salinity, 2005-2006, Co-investigator.
- As Principal Investigator
Groups
INDIAN OCEAN MODELING AND FIELD EXPERIMENTS GROUP
Students
- Jahfer Sharif (Ph.D.)
- Shrikant M. Pargaonkar (Ph.D.)
- Thushara Venugopal (Ph.D.)
- Anoop Nayak (Ph.D.)
- Aditya Kottapalli (Ph.D.)
- Bijit Kay Kalita (Ph.D.)
Project Staff
- Dr. Neema C P
- Dr. Chandanlal Parida
- Aswathi Das M T
- Prasanth R
- Kribashini N
- Gopan Suresh
Technical Assistant
- Jinesh Varghese
Past Students
- Dr. Jaison Kurian (UCLA, USA)
- Aneesh C. S. (Scripps, USA)
- Simi Mathew (NIOT, Chennai, India)
- G. V. Krishna Kumar (NSDL, Vizag, India)
- Kiran SR (PWD Kerala)
- Kiran Gajbhiye (P&G)
- Subham Rath (DeepR Analytics)
- Umashankar Das (IMD)
- Dr. Ambica Behara
Photo Gallery