Submitted as: model evaluation paper
04 Apr 2023
Submitted as: model evaluation paper |  | 04 Apr 2023
Status: this preprint is currently under review for the journal GMD.

Monsoon Mission Coupled Forecast System Version 2.0: Model Description and Indian Monsoon Simulations

Deepeshkumar Jain, Suryachandra A. Rao, Ramu Dandi, Prasanth A. Pillai, Ankur Srivastava, and Maheshwar Pradhan

Abstract. We describe the Monsoon Mission Coupled Forecast System version 2 (MMCFSv2) model, which substantially upgrades the present operational MMCFSv1 (version 1) at the India Meteorology Department. We evaluate MMCFSv2 based on the latest 25 years (1998–2022) of retrospective coupled hindcast simulations of the Indian Summer Monsoon with April initial conditions from Coupled Forecast System Reanalysis. MMCFSv2 simulates the tropical wind, rainfall, and temperature structure reasonably well. MMCFSv2 captures surface winds well and reduces precipitation biases over land, except in India and North America. The dry bias over these regions remained similar to MMCFSv1. MMCFSv2 captures significant features of the Indian monsoon, including the intensity and location of the maximum precipitation centres and the large-scale monsoon circulation. MMCFSv2 improves the phase skill (anomaly correlation coefficient) of the interannual variation of ISMR by 17 % and enhances the amplitude skill (Normalized Root Mean Square Error) by 20 %. MMCFSv2 shows improved teleconnections of ISMR with the equatorial Indian and Pacific oceans. This 25-year hindcast dataset will serve as the baseline for future sensitivity studies of MMCFSv2.

Deepeshkumar Jain et al.

Status: open (until 18 Jun 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CEC1: 'Comment on gmd-2023-53', Juan Antonio Añel, 05 May 2023 reply
    • AC1: 'Reply on CEC1', Anguluri Suryachandra rao, 05 May 2023 reply
      • CEC2: 'Reply on AC1', Juan Antonio Añel, 06 May 2023 reply
        • CEC3: 'Reply on CEC2', Juan Antonio Añel, 06 May 2023 reply
    • AC2: 'Reply on CEC1', Anguluri Suryachandra rao, 09 May 2023 reply
      • CEC4: 'Reply on AC2', Juan Antonio Añel, 10 May 2023 reply
        • AC3: 'Reply on CEC4', Anguluri Suryachandra rao, 19 May 2023 reply
          • AC4: 'Reply on AC3', Anguluri Suryachandra rao, 20 May 2023 reply
          • CEC5: 'Reply on AC3', Juan Antonio Añel, 21 May 2023 reply
            • AC5: 'Reply on CEC5', Anguluri Suryachandra rao, 24 May 2023 reply

Deepeshkumar Jain et al.

Deepeshkumar Jain et al.


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Short summary
The present manuscript discusses and evaluates the new Monsoon Mission Coupled Forecast System model version 2.0 which upgrades the currently operational MMCFSv 1.0 at Indian Meteorological Department, India. The individual model components have been substantially upgraded independently by their respective scientific groups. MMCFSv2 includes these upgrades into the operational coupled model. There is a significant skill improvement in simulating the Indian monsoon by the new model.