OMIP (cmip6 ocean only) experiments

[adagj]

Hi,

Brief info about Omip experiments (we will use omip1 - @group 4 and 6):
https://noresm-docs.readthedocs.io/en/latest/configurations/omips.html#omip-type-experiments

Relevant papers :

• https://gmd.copernicus.org/preprints/gmd-2022-260/gmd-2022-260.pdf
• https://gmd.copernicus.org/articles/13/3643/2020/

The OMIP protocol
https://gmd.copernicus.org/articles/9/3231/2016/gmd-9-3231-2016.pdf

[adagj]

OMIP-1 Protocol
(from https://gmd.copernicus.org/preprints/gmd-2019-363/gmd-2019-363.pdf)
The protocol for the OMIP-1/CORE-forced simulation is detailed in Griffies et al. (2016), and requires five repeated cycles of the 62-year atmospheric forcing. However, in preliminary JRA55-do forced (OMIP-2) runs conducted by many modeling 125 groups, decline and recovery of the Atlantic meridional overturning circulation (AMOC) occurred during the first few cycles before it reached a quasi-steady state. We thus found it necessary to perform no less than six cycles of the forcing for JRA55-do, with the 4th through 6th cycles (that is, the last three cycles) suitable for studying the uptake and spread of anthropogenic greenhouse gases under the protocols of the biogeochemical part of OMIP (Orr et al., 2017). Hence, to facilitate a comparison of the behaviors between OMIP-1 and OMIP-2, each model here is run for six cycles under both 130 forcing, rather than the five cycles originally proposed by Griffies et al. (2016). For OMIP-1, the experiment results in a 372-year simulation comprised of six cycles of the 62-year (1948–2009) CORE forcing from Large and Yeager (2009). In addition to atmospheric and river runoff forcing, we restored sea surface salinity to the monthly climatology provided by CORE, with restoring details, e.g., its strength, determined by the individual modeling groups. Computation of the surf

[adagj]

https://noresm-docs.readthedocs.io/en/latest/configurations/omips.html#omip-type-experiments