Nachiketa Acharya


Research Scientist III


Hydrology Applications




Nachiketa Acharya is an expert in statistical and machine learning modeling in climate sciences, especially sub-seasonal to seasonal forecasting. He is a CIRES/University of Colorado Research Scientist III working with the NOAA Earth System Research Laboratories's Physical Sciences Laboratory. Previously, he has held influential positions at the Department of Meteorology and Atmospheric Sciences at the Pennsylvania State University, the International Research Institute for Climate and Society at Columbia University, the Institute for Sustainable Cities at the City University of New York, the National Centre for Medium-Range Weather Forecasting in India, the Indian Institute of Technology Delhi, and Bhubaneswar. He is actively engaged in several Regional Climate Outlook Forum by WMO as an expert and trainer of S2S forecast and verification.

Research Interests

  • Statistical and Machine Learning modeling for meteorological problem
  • Statistical Downscaling, Bias Corrections, Model Output Statistics, Probabilistic Prediction.
  • Sub-seasonal to Seasonal Predictions
  • Forecast verification
  • Agro-Climatology, Hydro-Climatology.


  • Ph.D., Statistics, Department of Statistics, Utkal University, Odisha, India, 2014
  • M.Sc., Statistics, Department of Statistics, Visva-Bharati University, West Bengal, India, 2008
  • B.Sc., Statistics, Department of Statistics, Calcutta University, West Bengal, India, 2006

Professional Activities

Professional Memberships

  • Member of "Probability and Statistics" committee in American Meteorological Society
  • American Geophysical Union.
  • American Meteorological Society.
  • Asia Oceania Geosciences Society.
  • Indian Meteorological Society, India (Life member).

Honors and Awards

  • Won Best Presentation Award in professional category for the presentation on "Hybrid Prediction (Statistical/Dynamical) Scheme for Bay of Bengal Cyclone Season Activity" at the "International Conference on Meteorology and Climate Science 2022 organized by the Department of Meteorology University of Dhaka (2022).
  • Recipient of CIRES-IRP (The Innovative Research Program) grant

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