Bump GEOS version to 1.5.1

[Dooruk]

It's time for us to update develop GEOS version, which is quite old at this point. This way we can also create a Tier 2 test.

We have to use the MOM_override in this GEOS-ESM/GEOS_OceanGridComp#65 until we update to a version that encompasses that PR.

According to @zhaobin74, CICE6 is ready for the high-res setup, sounds like there is an issue with the ocean heating that impacts the sea-ice growth, however. @sanAkel or @zhaobin74 could you please briefly clarify if this is a particular resolution issue, or CICE4 vs. CICE6 issue, or overall GEOSgcm issue? That wasn't clear to me during yesterday's meeting.

[zhaobin74]

I can only speak of C90-0.66 deg coupled setup with the latest CICE6. There appears a polar cool down in the v11.5.1 which resulted in accumulation of thicker ice in the Arctic. The cooling happened abruptly during the first 2 years and then leveled off. In the Arctic, increasing ice volume is associated with lack of cloud forcing during the winter season.

I don't know whether the above applies to c180-1440x1080 config. I don't have such a run.

[sanAkel]

I can only speak of C90-0.66 deg coupled setup with the latest CICE6. There appears a polar cool down in the v11.5.1 which resulted in accumulation of thicker ice in the Arctic. The cooling happened abruptly during the first 2 years and then leveled off. In the Arctic, increasing ice volume is associated with lack of cloud forcing during the winter season.

I don't know whether the above applies to c180-1440x1080 config. I don't have such a run.

@Dooruk Please just update to v11.5.1 that's that matters for now.

[Dooruk]

I can only speak of C90-0.66 deg coupled setup with the latest CICE6. There appears a polar cool down in the v11.5.1 which resulted in accumulation of thicker ice in the Arctic. The cooling happened abruptly during the first 2 years and then leveled off. In the Arctic, increasing ice volume is associated with lack of cloud forcing during the winter season.

I don't know whether the above applies to c180-1440x1080 config. I don't have such a run.

Thanks Bin, I will focus on the high-res for now with CICE4 and CICE6 setups and see if we see a similar issue.

[sanAkel]

Thanks Bin, I will focus on the high-res for now with CICE4 and CICE6 setups and see if we see a similar issue.

This is what I'm hoping for:

1. @zhaobin74 continues to iron out CICE6 issues (appears a polar cool down in the v11.5.1 which resulted in accumulation of thicker ice in the Arctic.; @zhaobin74 also see a note from me in teams chat about it) at med res.
2. Get high-res configuration (with CICE4) to be better behaved without abruptly warming up ➡️ actively working on it.
3. Once above 2 is ✅ then @zhaobin74 and I can start working towards scientifically credible CICE6 for high-res.

@Dooruk I'll close this issue for you since you have all the info. and questions have been answered. If this is False, reopen. 🙏