Education

• Ph.D. from IISc, Bangalore.
• M.Sc. from Department of Marine Sciences, Cochin University.
• B.Sc. from University of Madras.

Course Offered

• Introduction to Earth, Atmosphere and Ocean Sciences (ES322) [shared with Dr VJ Rajesh]
• Numerical Weather Prediction (ESE661 and ESE461)
• Physical and Dynamical Meteorology (ESE611 and ESE411)
• Physical and Dynamical Oceanography (ESE612 and ESE412)

Area of Interest

• Numerical modeling of the atmosphere, data assimilation, mesoscale modeling, land-atmosphere interaction.

Past Affliation

• Head, Center for Oceans, Rivers, Atmosphere and Land Sciences, IIT Kharagpur (July 2008 – June 2009).
• Professor in Department of Physics & Meteorology. IIT-Kharagpur (Aug 2004 – 2009).
• Associate Professor in Department of Physics & Meteorology, IIT-Kharagpur (May 1999 – Aug 2004).
• Assistant Professor in Department of Physics & Meteorology, IIT-Kharagpur (Jan 1996 – May 1999).
• Lecturer in Department. of Physics & Meteorology, IIT-Kharagpur (July 1988 – Dec 1995).
• SRF and JRF, IISc, Bangalore (1984 – 1987).

Member of Professional Bodies

• Member: The National Academy of Sciences, India.
• Life Member: India Meteorological Society.
• Life Member: Indian Society for Theoretical and Applied Mechanics.

Member, Editorial Board

• Disaster Advances Journal.
• Open Journal of Marine Science

Member, Editorial Advisory Committee : The Open Atmospheric Science Journal

Ph.D. Guidance

• Dr A Sarkar (1997) Effects of an urban heat island and its growth on the local  weather and air quality over Indian region .
• Dr S. Mazumdar (1999) A Study of the various Initialization Schemes as applied to a Limited-Area Shallow Water Model over a Tropical Region.
• Dr V.F. Xavier (2008) The effect of assimilation of satellite and conventional meteorological data on the prediction of tropical meteorological system over India using a mesoscale model·          .
• Dr S. Sandeep (2009) Mesoscale Modeling of recent Tropical Cyclones that formed over India: Effects of Synthetic Vortex Initialization.
• Dr Vinodkumar (2009) Effects of Surface Data Assimilation in modeling various Monsoonal Mesoscale Disturbances over India.
• Dr M. Govindan Kutty (2010) The Impact of Three-Dimensional Variational Satellite Data Assimilation in simulating various Monsoonal Disturbances over India using the WRF Model.
• Dr P.K. Sinha (2013) Studies on Three-dimensional Variational Data Assimilation of wind observations in simulating meteorological systems over the Indian region
• Dr Dhanya (2016) Improved simulation of meteorological systems over India: Impact of assimilating satellite observations using 3DVar and EnKF.
• Dr Deepak Gopalakrishnan (2019) Regional 4DVar Assimilation Studies on Weather Systems Over India Using the WRF Model.
• Dr Kavita Patnaik (2024) (Jointly guided with Dr Amit Kesarkar of NARL, DoS) Hybrid Monte Carlo-Gear's Solver to Retrieve the Vertical Profiles of Minor Atmospheric Constituents for Cloud Microphysical Modelling.
• Dr Vibin Jose (2024) Modelling and observational studies of soil moisture over the Indian region
• Dr Sonali Maurya (2024) (jointly guided with Dr K V Sambhu Namboodiri pf VSSC, ISRO) Observational Studies on Turbulence in Atmospheric Surface Layer.
• Dr Debojit Sarkar (2024) (jointly guided with Dr Amit Kesarkar of NARL DoS) Role of collision-coalescence mechanisms in the occurrence of cloudburst event
• Mr Shrikar Kalyanam (ongoing since February 2021) Atmospheric Modeling Studies.
• Mr Jiteshwar Dadich ( ongoing since September 2020 jointly with Dr Amit Kesarkar of NARL, DoS) Development and study of a soil-air interface solver for modeling evaporation from soil.

Journal Publications:

1. Vibin Jose, and Anantharaman Chandrasekar, 2025, "Long-Term Relationship between Soil Moisture and Precipitation over India: An Analysis using Event Coincidence Analysis and PCMCI Method", Theoretical and Applied Climatology, 156(5), 1-21 ((DOI: https://doi.org/10.1007/s00704-025-05524-w)
2. Sonali Maurya, A Chandrasekar, KVS Namboodiri, T Narayana Rao and S Satheesh Kumar, 2025, 'Multifractal Framework of Partitioned Turbulent Data in Atmospheric Surface Layer' Environmental Fluid Mechanics, 25,1,. (https://doi.org/10.1007/s10652-025-10020-w)
3. Debojit Sarkar, Amit Kesarkar, Jyoti Bhate, Pavani Goriparthi and Anantharaman Chandrasekar, 2024, Synoptic forcing and thermo-dynamical processes during cloudburst event over Sauni Binsar, Uttrakhand, Atmospheric Research, 310, 107626 (https://doi.org/10.1016/j.atmosres.2024.107626)
4. Debojit Sarkar, Amit P Kesarkar, Jyoti Bhate, Pavani G and Anantharaman Chandrasekar, 2024, Cloud burst over Sauni Binsar, Uttarakhand: II. Appraisal of coalescence efficiencies, Journal of Earth System Science, 133, 219 ( https://doi.org/10.1007/s12040-024-02425-w)
5. Vibin Jose, Anantharaman Chandrasekar and Suraj Reddy, 2024, Impact of historical land cover changes on land surface characteristics over the Indian region using the Land Information System′, Pure and Applied Geophysics, 181, 8, 2561-2588 (https://doi.org/10.1007/s00024-024-03523-y)
6. Deebak V.S. Vijay and Anantharaman Chandrasekar,2024, A study on the possible Brown Ocean Effect: Impacts of an antecedent tropical cyclone on the rapid intensification of the 1999 Odisha Supercyclone, Journal of Geophysical Research - Atmospheres, 129, e2023JD039409 (DOI: https://doi.org/10.1029/2023JD039409)
7. Debojit Sarkar, Amit P Kesarkar, Jyoti Bhate, Pavani G and Anantharaman Chandrasekar, 2024, Cloud burst over the complex terrain of Sauni Binsar, Uttarakhand: I. Appraisal of collision efficiencies, Journal of Earth System Science, 133, 195 (https://doi.org/10.1007/s12040-024-02385-1)
8. Sonali Maurya, A Chandrasekar, and KVS Namboodiri, 2024, Wavelet Analysis of Atmospheric Turbulent Data, Environmental Fluid Mechanics, 24, 247-264 (DOI: https://doi.org/10.1007/s10652-024-09983-z)
9. Srikar Kalyanam and A Chandrasekar, 2024, Impacts due to an improved land surface soil state on Depressions over the Indian region : An Assessment using NASA Unified WRF, Pure and Applied Geophysics, 181, 247-272 (DOI: https://doi.org/10.1007/s00024-023-03416-6)
10. Kavita Patnaik, Amit P. Kesarkar, Subhrajit Rath, Jyoti N. Bhate, Anantharaman Chandrasekar, 2024, A 1-D model to retrieve the vertical profiles of minor atmospheric constituents for cloud microphysical modeling: III. Disturbed Weather Situations, Science of The Total Environment, 907, (https://doi.org/10.1016/j.scitotenv.2023.167959)
11. Sonali Maurya, Anantharaman Chandrasekar, Sambhu KV Namboodiri, 2023, "On the Nature of Drag Coefficient over a Tropical Coastal Station" Meteorology and Atmospheric Physics, 135:56 (https://doi.org/10.1007/s00703-023-00993-y)
12. Kavita Patnaik, Amit P. Kesarkar, Subhrajit Rath, Jyoti N. Bhate, Anantharaman Chandrasekar, 2023, A 1-D model to retrieve the vertical profiles of minor atmospheric constituents for cloud microphysical modeling: II. Simulation of diurnal cycle, Science of The Total Environment,905 (https://doi.org/10.1016/j.scitotenv.2023.167377)
13. Kavita Patnaik, Amit P Kesarkar, Subhrajit Rath, Jyoti Bhate, Abhishek Panchal, Chandrasekar Anantharaman,and Ramkumar Giri,, 2023, "A 1-D Model to Retrieve the Vertical Profiles of Minor Atmospheric Constituents for Cloud Microphysical Modelling: I. Formulation and validation", Science of the Total Environment, 905 (https://doi.org/10.1016/j.scitotenv.2023.163360)
14. Sonali Maurya, A. Chandrasekar and K. V. S. Namboodiri, 2023, "A Quantitative Study of Turbulent Fluxes over a Coastal Station", Boundary Layer Meteorology, 188 (1), 55-74 (https://doi.org/10.1007/s10546-023-00802-4)
15. Dhanraj Mane and A Chandrasekar, 2022, "Evaluation of a Stand-Alone WRF-Hydro Modeling System Using Different Rainfall Forcing Data: Case Study Over the Godavari River Basin, India", Pure and Applied Geophysics, 179,10, 3807-3826 (https://doi.org/10.1007/s00024-022-03136-3)
16. Deepak Gopalakrishnan and A Chandrasekar, 2022, "The sensitivity of the WRF-4DVar data assimilation system to the control variables: A Study on heavy rainfall events over India", Dynamics of Atmospheres and Oceans, 99, 101304 (https://doi.org/10.1016/j.dynatmoce.2022.101304)
17. Goriparthi Pavani and A Chandrasekar, 2022, "Impact of Enhanced Forest conditions on Land Surface Characteristics over Central India using LIS", Theoretical and Applied Climatology, 149,1-2,437-449 (https://doi.org/10.1007/s00704-022-04020-9)
18. Vangala Gayathri and A Chandrasekar, 2022, "Analysis of soil moisture estimates from global and regional datasets over the Indian region", Journal of Earth System Science, 131, 14 pp, (https://doi.org/10.1007/s12040-021-01800-1).
19. Vibin Jose and A Chandrasekar, 2021, "Assessment of EnKF data assimilation of satellite derived soil moisture over the Indian domain with the Noah Land Surface Model", Theoretical and Applied Climatology, 146, 851-867.
20. Goriparthi Pavani and A. Chandrasekar, 2021, "Impact of enhanced forest conditions on the regional weather over Central India using NU-WRF",Theoretical and Applied Climatology, 146, 1189-1206.
21. Vibin Jose and A Chandrasekar, 2021, "Impacts of different rainfall forcings on soil moisture distribution over India: Assessment using the Land Information System", Pure and Applied Geophysics (PAAG), 178, 4127-4145.
22. Deepak Gopalakrishnan and A Chandrasekar, 2018, "Improved 4DVar Simulation of Indian Ocean Tropical Cyclones using a Regional Model", IEEE Transactions of Geosciences and Remote Sensing (TGRS) 56, 9, 5107 – 5114.
23. Deepak Gopalakrishnan and A Chandrasekar, 2018, "On the Improved Predictive Skill of WRF Model with Regional 4DVar Initialization: A Study with North Indian Ocean Tropical Cyclones", IEEE Transactions on Geoscience and Remote Sensing (TGRS),56, 6, 3350 – 3357.
24. M. Dhanya, A.Chandrasekar. 2018, Mutivariate background error covariances in the assimilation of SAPHIR radiances in the simulation of three tropical cyclones over the Bay of Bengal using the WRF model, International Journal of Remote Sensing, 39, 1, 191-209.
25. M. Dhanya and A Chandrasekar, 2016, Impact of variational assimilation using multivariate background error covariances on the simulation of monsoon depressions over India, Annales Geophysicae, 34, 187–201.
26. M. Dhanya, Deepak Gopalakrishnan, A.Chandrasekar, Sanjeev Kumar Singh, V.S.Prasad, 2016, Impact of assimilating MeghaTropiques SAPHIR radiances in the simulation of tropical cyclones over Bay of Bengal using WRF model, International Journal of Remote Sensing, 37, 13, 3086-3103.
27. M. Dhanya and A Chandrasekar, 2014, Improved Rainfall Simulation by Assimilating Oceansat-2 Surface Winds Using Ensemble Kalman Filter for a Heavy Rainfall Event over South India”, IEEE Transactions on Geoscience and Remote Sensing (TGRS), 52,12, 7721-7726.
28. Impact of Assimilation of ATOVS Temperature and Humidity and SSM/I Total Precipitable Water on the Simulation of a Monsoon Depression, M. Govindan Kutty andA. Chandrasekar, Natural Hazards, DOI: 10.1007/s11069-011-9857-x (2011)
29. Effect of 3DVAR Assimilation of MODIS Temperature and Humidity Profiles on the Dynamic and Thermodynamic Features of Three Monsoon Depressions over the Bay of Bengal, M. Govindankutty, andA.Chandrasekar, Meteorological and Atmospheric Physics, 107, 65-79 (2010)
30. Improvement of Mesoscale Forecasts of Monsoon Depressions through Assimilation of QuikSCAT Wind data: Two Case studies over India, P.K. Sinha andA.Chandrasekar, The Open Atmospheric Science Journal, 4, 160-177 (2010).
31. Impact of 3DVAR assimilation of Doppler Weather Radar wind data observation for the prediction of a tropical cyclone, M. Govindankutty,A. Chandrasekar, and Devendra PradhanInternational Journal of Remote Sensing (accepted for publication), (2010).
32. Assessment of data assimilation approaches for the simulation of a monsoon depression over the Indian monsoon region, Vinodkumar,A.Chandrasekar, Dev Niyogi and K. Alapaty(in Boundary Layer Meteorology), 133, 343-366 (2009).
33. Impact of Land Surface Representation and Surface Data Assimilation on the Simulation of an Off-Shore Trough over the Arabian Sea, Vinodkumar,A. Chandrasekar,Dev Niyogi and K. AlapatyGlobal and Planetary Change,67, 104-116, (2009)
34. The impact of assimilation of satellite derived wind observations for the prediction of a monsoon depression over India using a mesoscale model, V.F.Xavier,A. Chandrasekarand Devendra SinghInternational Journal of Remote Sensing,29, no. 24, 7225 – 7250 (2008)
35. The effect of satellite and conventional meteorological data assimilation on the mesoscale modeling of monsoon depressions over India, V.F. Xavier,A.Chandrasekar, Hasibur Rahman, Dev Niyogi and K. AlapatyMeteorological and Atmospheric Physics(DOI: 10.1007/s00703-008-0314-7),(2008)
36. Development of the Flux-Adjusting Surface Data Assimilation System for mesoscale models, K. Alapaty, Dev Niyogi, F. Chen. P. Pyle,A. Chandrasekarand N. SeamanJournal of Applied Meteorology and Climatology,47, 9, 2331-2350. (2008)
37. Combined IR- Microwave satellite retrieval of temperature and moisture profiles using the ICI inversion system and its application in the MM5 model, Devendra Singh, S. Sandeep andA. Chandrasekar,Atmosfera, 21, 191-212. (2008)
38. The impacts of indirect soil moisture assimilation and direct surface temperature and humidity assimilation on a mesoscale model simulation of a Indian monsoon depression, Vinodkumar,A.Chandrasekar, K. Alapaty and Dev Niyogi,Journal of Applied Meteorology and Climatology, 47, 1393-1412. (2008)
39. The impact of assimilation of MODIS observations using WRF-VAR for the prediction of a monsoon depression during September 2006, M. Govindankutty,A. Chandrasekar,AK Bohra, JP George and M. Dasgupta,The Open Atmospheric Science Journal,2, 68-78. (2008)
40. V.F. Xavier and A.Chandrasekar, 2007, Improvements in the forecast of a tropical cyclone by the assimilation of QuikSCAT wind data using a mesoscale model, Journal of Marine and Atmospheric Research, Vol. 3, No.1, 18-29.
41. V.F.Xavier, S. Sandeep , A. Chandrasekar and B.Simon, 2007, Impact of assimilation of MODIS and IMD data on the prediction of a tropical cyclone using a mesoscale model, Journal of Marine and Atmospheric Research, Vol. 3, No.1, 44-64.
42. Vinodkumar, A.Chandrasekar and R. Suresh, 2007, Sea-breeze induced convection over Chennai, Journal of Marine and Atmospheric Research, Vol. 3, No.1, 92-100.
43. S. Sandeep, A. Chandrasekar and S. K. Dash, 2007, On the prediction of tropical cyclones over the Indian region using a synthetic vortex scheme in a mesoscale model, Pure and Applied Geophysics, 164, 1443-1463.
44. Vinodkumar, A.Chandrasekar and R. Suresh, 2007, Sea breeze convergence and convection over Chennai, India, International Journal of Ecology and Development, 7, S07, 52-64.
45. Vinodkumar, A.Chandrasekar, K.Alapaty and D.S. Niyogi, 2007, The effect of a surface data assimilation technique and the traditional four-dimensional data assimilation on the simulation of a monsoon depression over India using a mesoscale model, Natural Hazards, 42. 439-453
46. Vinodkumar and A.Chandrasekar, 2007, Ensemble lagged forecasts of a monsoon depression over India using a mesoscale model, Atmosfera, 20, 1, 25-44
47. S. Sandeep, A. Chandrasekar and S.K. Dash, 2006, Impact of modification of initial cyclonic structure on the prediction of a cyclone over the Arabian Sea, Natural Hazards, 41,3, 487-499
48. V.F. Xavier, A.Chandrasekar, R.Singh and B.Simon, 2006, The impact of assimilation of MODIS data for the prediction of a tropical low pressure system over India using a mesoscale model, International Journal of Remote Sensing, 27, 20, 4655-4676
49. S. Sandeep, A.Chandrasekar and Devendra Singh, 2006, The impact of assimilation of AMSU data for the prediction of a tropical cyclone over India using a mesoscale model, International Journal of Remote Sensing, 27,20, 4621-4653
50. V.F. Xavier, A.Chandrasekar and B.Simon, 2006, The effect of assimilation of satellite and regular meteorological data for the prediction of a well-marked low pressure over Arabian Sea using a mesoscale model, International Journal of Ecology and Development, 4, S06, 15-29.
51. S. Sandeep, A.Chandrasekar and S.K.Dash, 2006, Effect of inclusion of a synthetic vortex on the prediction of a tropical cyclone over the Bay of Bengal using a mesoscale model, International Journal of Ecology and Development, 4, 35-51.
52. Chandrasekar, A., Philbrick, C.R., Doddridge, B.G., Clark, R.D., and Georgopoulos, P.G., 2004, A comparative study of prognostic MM5 meteorological modeling with aircraft, wind profiler, lidar, tethered balloon and RASS data over Philadelphia during a 1999 summer episode, Environmental Fluid Mechanics, 4, 339-365
53. Chandrasekar, A., Philbrick, C.R., Doddridge, B.G., Clark, R.D. and Georgopoulos, P.G., 2003, A comparison study of RAMS simulations with aircraft, wind profiler, lidar, tethered balloon and RASS data over Philadelphia during a 1999 summer episode, Atmospheric Environment, 37, 4973-4984
54. Chandrasekar, A., Philbrick, C.R., Clark, R.D., Doddridge, B.G. and Georgopoulos, P.G., 2003, Evaluating the performance of a computationally efficient MM5/CALMET system for developing wind field inputs to air quality models, Atmospheric Environment, 37, 3267-3276
55. Chandrasekar, A., Philbrick, C.R., Clark, R.D., Doddridge, B.G. and Georgopoulos, P.G., 2003, A large-eddy simulation study of the convective boundary layer over Philadelphia during the 1999 summer NE-OPS campaign, Environmental Fluid Mechanics, 3, 305-329
56. Chandrasekar, A, 2002, Study on the sensitivity of the vertical cooling (heat sink) on the displacement of mid-tropospheric ridge using a linear model, Proc. Indian Academy of Sciences (Earth & Planetary Sciences), 111, No. 4, 437-451
57. Chandrasekar, A, Bhaskar Rao, D.V. and Kitoh, A., 1999, Effect of horizontal resolution on the simulation of Asian Summer Monsoon using the MRI GCM- II, Papers in Meteorology & Geophysics, 50, No. 2, 65-80.
58. Chandrasekar, A. and Kitoh, A., 1998, Impact of localized sea surface temperature anomalies over the equatorial Indian Ocean on the Indian summer monsoon, Journal of Meteorological Society of Japan,76, No. 6, 841-853
59. Sarkar, A., Saraswat, R.S. and Chandrasekar, A., 1998, A Numerical study of the effects of the urban heat island on the characteristic features of the sea breeze circulation, Proc. Indian Acad. Sciences (Earth & Planetary Sciences), 107, No. 2, 127-138
60. Mazumdar, S., Nair, D.R.C., Saraswat, R.S. and Chandrasekar, A., 1997, A Comparative study of an explicit and implicit Normal Mode Initialization for a Tropical Limited Area Model, Proc. Indian Acad. Sciences (Earth & Planetary Sciences), 106, No. 3, 1-9
61. Chandrasekar, A, 1997, A Linear Model Study of the Mid Tropospheric Ridge and its displacement- Inclusion of a Surface Heat Sink, Mausam, 48, No. 1., 29-32
62. Chandrasekar, A and Goswami, B.N., 1996, A Linear Model Study of the Mid Tropospheric Ridge and its displacement, Mausam, 47, No. 4, 369-376
63. Chandrasekar, A and Goswami, B.N., 1996, Feedback between Convective Heating and Dynamics and Movements of Tropical Cyclones, Meteorology and Atmospheric Physics, 61, 55-64
64. Biswas, M.N., Chandrasekar, A and Goswami, B.N., 1995, Bispectra of a Tropical Coupled Ocean Atmosphere System, Current Science, 68, 1236-1243
65. AnanthaRaman, A., Goswami, B.N. and Chandrasekar, A, 1995, Lyapunov exponents and Predictability of the Tropical Coupled Ocean Atmosphere System, Current Science, 68, 946-950
66. Chandrasekar, A and Nath, G, 1994, Unsteady compressible nonhomentropic boundary layer flow about a rotating sphere, Archives of Mechanics, 46, 625-638
67. Chandrasekar, A and Nath, G, 1993, Unsteady swirling boundary layer flow through a nozzle, diffuser and hydrocyclone with variable viscosity, Indian Journal of Technology, 31, 871-878.
68. Chandrasekar, A and Nath, G, 1989, Unsteady rotating compressible flow over a rotating infinite disk with a magnetic field, Acta Technica CSAV, No. 1, 58-70.
69. Chandrasekar, A and Nath, G, 1986, Time dependent rotational motion of a viscous fluid over an infinite porous disk with a magnetic field, International Journal of Engineering Science., 24, No. 10, 1667-1680

Publication of Books:

• Chandrasekar, A.and M. Govindankutty, 2013. “Studies on the impacts of 3DVAR assimilation of satellite observations on the simulation of monsoon depressions over India“, Springer;ISBN 978-3-642-35087-0 ( pp 643-705) in “Data Assimilation for Atmospheric, Oceanic and Hydrologic Applications (Vol. II)” eds. by Seon Ki Park and Liang Xu
• A book titled“Basics of Atmospheric Science” (2010)byA. Chandrasekar(446 pages and costing Rs 375) has been published byPHI Learning Private Limited, New Delhi.
  Click here to view the Cover Page, Foreword, and Contents of the book.
• A book titled“Numerical methods for Atmospheric and Oceanic Sciences” (2022) by A. Chandrasekar (519 pages and costing Rs 1500) has been published by Cambridge University Press.
  Click here to view the Front Page, Back Page, First Page, Foreword, Preface and Contents of the book.
• The second edition of the book titled "Basics of Atmopsheric Science" (2022) by A. Chandrasekar(472 pages and costing Rs 895) has been published by PHI Learning Private Limited, New Delhi.
  Click here to view the Cover Page of the second edition of the above book.

Projects:

1. ‘Impact of assimilating high temporal resolution data from INSAT-3D in high-resolution mesoscale model for prediction of severe weather systems over Bay of Bengal and neighbouring land region,’- Funded bySAC, ISRO
2. ‘Assimilation of Oceansat-2 scatterometer in mesoscale model’- Funded bySAC, ISRO
3. Impact of assimilating SAPHIR and GPS-ROS data from MEGHA TROPIQUES in high resolution mesoscale model for prediction of severe weather systems over IndiaFunded byIIST

• Achandbook
• Foreword