# \#SI3 **URL:** https://nemo-ocean.discourse.group/tag/si3/79.md [Latest](https://nemo-ocean.discourse.group/latest.md) · [Categories](https://nemo-ocean.discourse.group/categories.md) · [Tags](https://nemo-ocean.discourse.group/tags.md) --- ## [Bug: segmentation fault with 4D sea ice outputs](https://nemo-ocean.discourse.group/t/bug-segmentation-fault-with-4d-sea-ice-outputs/1051)
**Author:** [@jraylmer](https://nemo-ocean.discourse.group/u/jraylmer)\ **Replies:** 0\ **Last updated:** [13 October 2026 15:18 UTC](https://nemo-ocean.discourse.group/t/bug-segmentation-fault-with-4d-sea-ice-outputs/1051 "2026-10-13T15:18:53Z")
Requesting either or both of the following outputs causes an otherwise functional configuration to crash with a seg. fault: icesalt\_lay icetemp\_lay These are in the field group SBC\_4D in field\_def\_nemo-ice.xml. They a… --- ## [SI³: EAP rheology broken? Segmentation fault with ln\_rhg\_EAP = .TRUE](https://nemo-ocean.discourse.group/t/si-eap-rheology-broken-segmentation-fault-with-ln-rhg-eap-true/1035)
**Author:** [@jraylmer](https://nemo-ocean.discourse.group/u/jraylmer)\ **Replies:** 0\ **Last updated:** [24 June 2026 09:56 UTC](https://nemo-ocean.discourse.group/t/si-eap-rheology-broken-segmentation-fault-with-ln-rhg-eap-true/1035 "2026-06-24T09:56:14Z")
There seems to be a technical issue with the EAP rheology scheme. When activating this scheme in a basic reference configuration with no code modifications, I am getting a segmentation fault when activating this scheme. … --- ## [North fold bug? Artefact along north fold in sea ice variables](https://nemo-ocean.discourse.group/t/north-fold-bug-artefact-along-north-fold-in-sea-ice-variables/972)
**Author:** [@jraylmer](https://nemo-ocean.discourse.group/u/jraylmer)\ **Replies:** 15\ **Last updated:** [17 April 2026 10:12 UTC](https://nemo-ocean.discourse.group/t/north-fold-bug-artefact-along-north-fold-in-sea-ice-variables/972 "2026-04-17T10:12:01Z")
I run ORCA2-ICE simulations and often see artefacts in output variables along the grid cells where north-folding occurs. It sometimes takes several years before it appears, depending on the forcing and namelist settings.… --- ## [NEMO5 - new instabilities in SI3 for eORCA025 simulations](https://nemo-ocean.discourse.group/t/nemo5-new-instabilities-in-si3-for-eorca025-simulations/920)
**Author:** [@lambertn](https://nemo-ocean.discourse.group/u/lambertn)\ **Replies:** 10\ **Last updated:** [11 August 2025 00:39 UTC](https://nemo-ocean.discourse.group/t/nemo5-new-instabilities-in-si3-for-eorca025-simulations/920 "2025-08-11T00:39:05Z")
Hi everyone, We are currently testing NEMO 5.0 for various CMIP6 experiments using the global eORCA1 and eORCA025 configurations, with the goal of comparing results against NEMO 4.2.2. For eORCA1, we were able to run s… --- ## [Ice deposition (the inverse of sublimation) in coupled simulations](https://nemo-ocean.discourse.group/t/ice-deposition-the-inverse-of-sublimation-in-coupled-simulations/874)
**Author:** [@dringeisen](https://nemo-ocean.discourse.group/u/dringeisen)\ **Replies:** 6\ **Last updated:** [26 June 2025 21:08 UTC](https://nemo-ocean.discourse.group/t/ice-deposition-the-inverse-of-sublimation-in-coupled-simulations/874 "2025-06-26T21:08:32Z")
Hello, We have NEMO4.2 coupled to our in-house atmosphere through our in-house coupler. (CanAM, CanCPL) We are having some issues getting a realistic sea ice cover in coupled simulations, (our sea ice volume explodes 2… --- ## [Should hfx\_sub be substracted to compute qt\_oce\_ai?](https://nemo-ocean.discourse.group/t/should-hfx-sub-be-substracted-to-compute-qt-oce-ai/772)
**Author:** [@dringeisen](https://nemo-ocean.discourse.group/u/dringeisen)\ **Replies:** 2\ **Last updated:** [29 October 2024 21:37 UTC](https://nemo-ocean.discourse.group/t/should-hfx-sub-be-substracted-to-compute-qt-oce-ai/772 "2024-10-29T21:37:14Z")
Hi! We, at CCCma, are having a heat conservation issue in our coupling with out atmospheric model CanAM, and looking at the NEMO-SI3 side, we have a question: In ice\_thd\_dh, where hfx\_sub is computed, a comment says !… --- ## [Coupling two hemispheric SI³ with ocean via OASIS](https://nemo-ocean.discourse.group/t/coupling-two-hemispheric-si-with-ocean-via-oasis/247)
**Author:** [@emalod](https://nemo-ocean.discourse.group/u/emalod)\ **Replies:** 1\ **Last updated:** [25 March 2022 10:59 UTC](https://nemo-ocean.discourse.group/t/coupling-two-hemispheric-si-with-ocean-via-oasis/247 "2022-03-25T10:59:29Z")
The NEMO-SI³ configuration can already be split into two separated executables and coupled via OASIS. The resulting modularity helps to enhance computing performance. In this new configuration, SI³ - in Stand Alone Surf… --- ## [\[v4.0.x\] Closing freshwater budget (ocean + sea ice)](https://nemo-ocean.discourse.group/t/v4-0-x-closing-freshwater-budget-ocean-sea-ice/219)
**Author:** [@robinson](https://nemo-ocean.discourse.group/u/robinson)\ **Replies:** 7\ **Last updated:** [2 March 2022 18:53 UTC](https://nemo-ocean.discourse.group/t/v4-0-x-closing-freshwater-budget-ocean-sea-ice/219 "2022-03-02T18:53:25Z")
Dear All, I am trying to do a total budget of volume and freshwater in a closed area in the Arctic. So basically to do that I need to compute horizontal fluxes of volume and salt in the ocean AND in Sea ice. First I wo… --- ## [ORCA12 configurations](https://nemo-ocean.discourse.group/t/orca12-configurations/216)
**Author:** [@fmasson](https://nemo-ocean.discourse.group/u/fmasson)\ **Replies:** 5\ **Last updated:** [27 February 2022 19:52 UTC](https://nemo-ocean.discourse.group/t/orca12-configurations/216 "2022-02-27T19:52:32Z")
Dear all, At UCLouvain we are aiming at producing a stand-alone (ERA5-forced or similar) ocean-sea ice simulation covering the satellite era (1979-now) by the end of this year. Currently, we have NEMO4.0.7 configuration…