• OMIP goal

  The Ocean Model Intercomparison Project (OMIP) for CMIP7 aims to provide a framework for evaluating, understanding, and improving numerical models of ocean circulation, sea-ice, ocean tracer distributions, and biogeochemical cycles.

  This is the latest installment of OMIP. The physical part of OMIP has been organized in the past by the Ocean Model Development Panel (OMDP) of the WCRP core program Climate and Ocean Variability, Predictability, and Change (CLIVAR). Prior to OMIP, the OMDP developed the Coordinated Ocean–ice Reference Experiments (COREs) framework and comprehensively assessed the performance of global ocean–sea-ice models (Griffies et al., 2009, 2014; Danabasoglu et al., 2014, 2016; Downes et al., 2015; Farneti et al., 2015; Wang et al., 2016a, b; Ilicak et al., 2016; Tseng et al., 2016; Rahaman et al., 2020). CORE has successfully evolved into phase 1 of the physical part of OMIP (OMIP-1).

• Phase 1 protocol

  The protocol will largely follow that outlined in Griffies et al., 2016.

  We are considering adjustments to:

  • The calculation of atmosphere-ocean surface stress based on the wind speed relative to the ocean (the “eddy-killing” effect is a function of spatial resolution and might be specified as part of the new protocol).
  • The salinity restoring protocol (variation in restoring rates between models in the past has led to different implied hydrologic cycles).

• Data request

  The data request will be following Griffies et al., 2016, but with adjustments/corrections to be described in a forthcoming document led by Baylor Fox-Kemper.

• Forcing datasets

  The first phase of OMIP will use the version 1.5 of the JRA55-do dataset for years 1958-2022, as published by Tsujino et al., 2018.

• OMIP contacts

  Gokhan Danabasoglu (Point of contact for OMIP)

  Baylor Fox-Kemper (Point of contact for data request)

  Alistair Adcroft (Point of contact for OMDP)

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