# Latest **URL:** https://nemo-ocean.discourse.group/latest.md?page=2 [Latest](https://nemo-ocean.discourse.group/latest.md) · [Categories](https://nemo-ocean.discourse.group/categories.md) · [Tags](https://nemo-ocean.discourse.group/tags.md) **Page:** 3 --- ## [Domain\_cfg in nemo 5 resulting a shift in cell](https://nemo-ocean.discourse.group/t/domain-cfg-in-nemo-5-resulting-a-shift-in-cell/965)
**Author:** [@saad](https://nemo-ocean.discourse.group/u/saad)\ **Replies:** 0\ **Last updated:** [10 November 2025 16:07 UTC](https://nemo-ocean.discourse.group/t/domain-cfg-in-nemo-5-resulting-a-shift-in-cell/965 "2025-11-10T16:07:18Z")
Hello, I am migrating from nemo 3.6 to nemo 5. in my nemo 3.6 namelist, when i would specify: namelist: ppglam0 = -18.125 ! longitude of first raw and column T-point (jphgr\_msh = 1) ppgphi0 = 30… --- ## [Time stepping procedure and split-explicit method](https://nemo-ocean.discourse.group/t/time-stepping-procedure-and-split-explicit-method/964)
**Author:** [@gdenoordhout](https://nemo-ocean.discourse.group/u/gdenoordhout)\ **Replies:** 0\ **Last updated:** [9 November 2025 13:16 UTC](https://nemo-ocean.discourse.group/t/time-stepping-procedure-and-split-explicit-method/964 "2025-11-09T13:16:18Z")
Dear, I am currently trying to understand in details how the time stepping procedure does work in Nemo 4.2.1 when using the modified Leapfrog algorithm with a non-linear split-explicit free surface. First, I wonder if … --- ## [Differences in NEMO when coupled with OASIS (even with inactive second model)](https://nemo-ocean.discourse.group/t/differences-in-nemo-when-coupled-with-oasis-even-with-inactive-second-model/961)
**Author:** [@contrerm](https://nemo-ocean.discourse.group/u/contrerm)\ **Replies:** 4\ **Last updated:** [7 November 2025 15:44 UTC](https://nemo-ocean.discourse.group/t/differences-in-nemo-when-coupled-with-oasis-even-with-inactive-second-model/961 "2025-11-07T15:44:56Z")
Hi everyone, I would like to ask a question concerning coupled simulations using OASIS I am running some tests to compare two simulations using the eORCA025 configuration of NEMO v4.2.1 with XIOS. The only difference b… --- ## [Nested configuration with T-S damping enabled in parent](https://nemo-ocean.discourse.group/t/nested-configuration-with-t-s-damping-enabled-in-parent/962)
**Author:** [@davidegregg](https://nemo-ocean.discourse.group/u/davidegregg)\ **Replies:** 0\ **Last updated:** [4 November 2025 13:43 UTC](https://nemo-ocean.discourse.group/t/nested-configuration-with-t-s-damping-enabled-in-parent/962 "2025-11-04T13:43:26Z")
Triple-nested configuration (v4.2.2) crashes with NaN values in child grid 2 at an early timestep when T-S restoring is enabled in the parent grid only. Crash occurs before parent has completed its first time step. Conf… --- ## [Diadct.f90 problem](https://nemo-ocean.discourse.group/t/diadct-f90-problem/959)
**Author:** [@francesco.tuccia](https://nemo-ocean.discourse.group/u/francesco.tuccia)\ **Replies:** 1\ **Last updated:** [22 October 2025 10:54 UTC](https://nemo-ocean.discourse.group/t/diadct-f90-problem/959 "2025-10-22T10:54:57Z")
Good morning everyone, I am facing some problems setting up some transport sections using the diadct.f90 module. My section\_ijglobal.diadct file reads -68. -54.5 -60. -64.7 00 okstrpond noice ACC\_Drake\_Passag… --- ## [Bug in computation of potential temp from conservative temp (\`eos\_pt\_from\_ct\`)](https://nemo-ocean.discourse.group/t/bug-in-computation-of-potential-temp-from-conservative-temp-eos-pt-from-ct/953)
**Author:** [@rabbit](https://nemo-ocean.discourse.group/u/rabbit)\ **Replies:** 2\ **Last updated:** [17 October 2025 20:10 UTC](https://nemo-ocean.discourse.group/t/bug-in-computation-of-potential-temp-from-conservative-temp-eos-pt-from-ct/953 "2025-10-17T20:10:43Z")
We are running nemo with TEOS-10 and open cavities. We came across the bug that the output variable toce\_pot(thetao) is masked with surface tmask In src/OCE/TRA/eosbn2.F90 on line 1086: ztm = tmask(ji,jj,1) Whi… --- ## [XIOS new output variable](https://nemo-ocean.discourse.group/t/xios-new-output-variable/958)
**Author:** [@Pysh](https://nemo-ocean.discourse.group/u/Pysh)\ **Replies:** 0\ **Last updated:** [15 October 2025 13:59 UTC](https://nemo-ocean.discourse.group/t/xios-new-output-variable/958 "2025-10-15T13:59:46Z")
Hi! My previous message about new output variable was “XIOS error in the case of determination of new output variable“. I believe that I found reason. I’v used for calculation my additional module with my new field. In … --- ## [Possible issue with ln\_dyn\_trd (momentum trend diagnostics) affecting temperature and salinity fields](https://nemo-ocean.discourse.group/t/possible-issue-with-ln-dyn-trd-momentum-trend-diagnostics-affecting-temperature-and-salinity-fields/956)
**Author:** [@luciag](https://nemo-ocean.discourse.group/u/luciag)\ **Replies:** 0\ **Last updated:** [13 October 2025 12:42 UTC](https://nemo-ocean.discourse.group/t/possible-issue-with-ln-dyn-trd-momentum-trend-diagnostics-affecting-temperature-and-salinity-fields/956 "2025-10-13T12:42:32Z")
Hello everyone, I am running NEMO 4.2 and would like to compute the diagnostics for the momentum trend. To do this, I activated the flag ln\_dyn\_trd and added the fields I wanted to output in the XML file. I noticed tha… --- ## [Correction of previos messege about XIOS error](https://nemo-ocean.discourse.group/t/correction-of-previos-messege-about-xios-error/955)
**Author:** [@Pysh](https://nemo-ocean.discourse.group/u/Pysh)\ **Replies:** 0\ **Last updated:** [13 October 2025 10:23 UTC](https://nemo-ocean.discourse.group/t/correction-of-previos-messege-about-xios-error/955 "2025-10-13T10:23:40Z")
Sorry. Previous message was corrupted I believe due to angle brackets Into the field\_def\_nemo-ice.xml file I put the string: field field\_ref=“dicec” name=“dicec” field id=“dicec” long\_name=“Sea-ice … --- ## [XIOS error in the case of determination of new output variable](https://nemo-ocean.discourse.group/t/xios-error-in-the-case-of-determination-of-new-output-variable/954)
**Author:** [@Pysh](https://nemo-ocean.discourse.group/u/Pysh)\ **Replies:** 0\ **Last updated:** [13 October 2025 10:09 UTC](https://nemo-ocean.discourse.group/t/xios-error-in-the-case-of-determination-of-new-output-variable/954 "2025-10-13T10:09:10Z")
Dear All! I can’t output a new my field (dicec, an increment for ice concentration) in XIOS. The error message is: In file “nc4\_data\_output.cpp”, function “void xios::CNc4DataOutput::writeFieldData\_(xios::CField \*)”, l… --- ## [Generate denser layers in both the upper and near-bottom ocean](https://nemo-ocean.discourse.group/t/generate-denser-layers-in-both-the-upper-and-near-bottom-ocean/952)
**Author:** [@wangy](https://nemo-ocean.discourse.group/u/wangy)\ **Replies:** 0\ **Last updated:** [9 October 2025 15:32 UTC](https://nemo-ocean.discourse.group/t/generate-denser-layers-in-both-the-upper-and-near-bottom-ocean/952 "2025-10-09T15:32:49Z")
Hi everyone, I would like to know whether it is possible to generate denser layers in both the upper and near-bottom ocean by using the DOMAINcfg tool? If so, how should the parameters in the namelist\_cfg be configured… --- ## [Is it possible to start NEMO at 12 UTC?](https://nemo-ocean.discourse.group/t/is-it-possible-to-start-nemo-at-12-utc/701)
**Author:** [@lowry389](https://nemo-ocean.discourse.group/u/lowry389)\ **Replies:** 8\ **Last updated:** [30 September 2025 10:24 UTC](https://nemo-ocean.discourse.group/t/is-it-possible-to-start-nemo-at-12-utc/701 "2025-09-30T10:24:19Z")
Hi, Generally NEMO starts running at 00 o’ clock. Now I want to set up a NEMO model for operational forecast starting from 12(UTC), is it possible? Rui --- ## [Compilation error occurs when adding "key\_agrif"](https://nemo-ocean.discourse.group/t/compilation-error-occurs-when-adding-key-agrif/949)
**Author:** [@wangy](https://nemo-ocean.discourse.group/u/wangy)\ **Replies:** 2\ **Last updated:** [24 September 2025 02:55 UTC](https://nemo-ocean.discourse.group/t/compilation-error-occurs-when-adding-key-agrif/949 "2025-09-24T02:55:23Z")
Hi everyone, I have compiled and run a case similar to AMM12 using version NEMO 4.2.0. Now I try to add the NST subcomponent and to append the cpp key key\_agrif in my case. The compilation command is as follows: ./ma… --- ## [Bug when having more than 1 BDY when using PISCES model](https://nemo-ocean.discourse.group/t/bug-when-having-more-than-1-bdy-when-using-pisces-model/948)
**Author:** [@Claude](https://nemo-ocean.discourse.group/u/Claude)\ **Replies:** 1\ **Last updated:** [17 September 2025 13:26 UTC](https://nemo-ocean.discourse.group/t/bug-when-having-more-than-1-bdy-when-using-pisces-model/948 "2025-09-17T13:26:07Z")
An issue occurs when having more than 1 BDY in a configuration using the PISCES model. As it is coded in the trcbc.F90 module, only files for one BDY are read. Few changes are required to be able to read BIO data files a… --- ## [CMIP7 data request to XIOS xml files](https://nemo-ocean.discourse.group/t/cmip7-data-request-to-xios-xml-files/870)
**Author:** [@joakim](https://nemo-ocean.discourse.group/u/joakim)\ **Replies:** 2\ **Last updated:** [15 September 2025 23:27 UTC](https://nemo-ocean.discourse.group/t/cmip7-data-request-to-xios-xml-files/870 "2025-09-15T23:27:53Z")
Good afternoon I’ve been looking for various methods to translate the CMIP7 data request (GitHub - CMIP-Data-Request/CMIP7\_DReq\_Software) to XML files for XIOS for EC-Earth (NEMO 4.2.2 and XIOS 2.5). As NEMO 4.2.x and … --- ## [Coupling at AGRIF child grid level](https://nemo-ocean.discourse.group/t/coupling-at-agrif-child-grid-level/947)
**Author:** [@tgraham](https://nemo-ocean.discourse.group/u/tgraham)\ **Replies:** 2\ **Last updated:** [10 September 2025 13:34 UTC](https://nemo-ocean.discourse.group/t/coupling-at-agrif-child-grid-level/947 "2025-09-10T13:34:35Z")
Hi all, Over the next few years, we may wish to start developing coupled models with AGRIF nests. Can I confirm that at the moment, this is only possible at the parent grid level (i.e. the atmosphere doesn’t see the hig… --- ## [502 error when attempting to access the forge wiki](https://nemo-ocean.discourse.group/t/502-error-when-attempting-to-access-the-forge-wiki/946)
**Author:** [@rharel](https://nemo-ocean.discourse.group/u/rharel)\ **Replies:** 1\ **Last updated:** [9 September 2025 14:48 UTC](https://nemo-ocean.discourse.group/t/502-error-when-attempting-to-access-the-forge-wiki/946 "2025-09-09T14:48:58Z")
Hello, Just to let the sysadmins know: I’ve been getting a persistent 502 error trying to access https://forge.nemo-ocean.eu/nemo/nemo/-/wikis/home --- ## [XIOS3 demonstrator configuration failing with segmentation fault](https://nemo-ocean.discourse.group/t/xios3-demonstrator-configuration-failing-with-segmentation-fault/945)
**Author:** [@jraylmer](https://nemo-ocean.discourse.group/u/jraylmer)\ **Replies:** 0\ **Last updated:** [28 August 2025 17:43 UTC](https://nemo-ocean.discourse.group/t/xios3-demonstrator-configuration-failing-with-segmentation-fault/945 "2025-08-28T17:43:33Z")
Hi, I am trying to upgrade from using XIOS2 to XIOS3 and initially just trying to get (a minor variation on) the X3\_ORCA2\_ICE\_PISCES demonstrator configuration working. I have successfully compiled XIOS3-trunk (revisio… --- ## [NEMO4.2.1-FABM coupling optical module](https://nemo-ocean.discourse.group/t/nemo4-2-1-fabm-coupling-optical-module/940)
**Author:** [@Josefine](https://nemo-ocean.discourse.group/u/Josefine)\ **Replies:** 2\ **Last updated:** [22 August 2025 09:03 UTC](https://nemo-ocean.discourse.group/t/nemo4-2-1-fabm-coupling-optical-module/940 "2025-08-22T09:03:08Z")
I am trying to do the coupling NEMO4.2.1-FABM-ERGOM2.1 together with an external bio-optical module OASIM. The module is compiled through FABM but it needs additional meteorological forcing parameters, such as cloud liqu… --- ## [SVN ipsl forge for nemo 4.0.6](https://nemo-ocean.discourse.group/t/svn-ipsl-forge-for-nemo-4-0-6/942)
**Author:** [@JuliaR](https://nemo-ocean.discourse.group/u/JuliaR)\ **Replies:** 1\ **Last updated:** [20 August 2025 07:24 UTC](https://nemo-ocean.discourse.group/t/svn-ipsl-forge-for-nemo-4-0-6/942 "2025-08-20T07:24:53Z")
Hello, I am trying to check out NEMO in order to re-compile with version 4.0.6. Using svn co http://forge.ipsl.jussieu.fr/nemo/svn/NEMO/releases/r4.0/r4.0.6 \[…\], it seems that the repository on the IPSL is still unavai… --- ## [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… --- ## [\[v4.2.x\] BUG Double allocation of memory in bdydyn ln\_trddyn=true](https://nemo-ocean.discourse.group/t/v4-2-x-bug-double-allocation-of-memory-in-bdydyn-ln-trddyn-true/938)
**Author:** [@johannestimm](https://nemo-ocean.discourse.group/u/johannestimm)\ **Replies:** 0\ **Last updated:** [8 August 2025 16:19 UTC](https://nemo-ocean.discourse.group/t/v4-2-x-bug-double-allocation-of-memory-in-bdydyn-ln-trddyn-true/938 "2025-08-08T16:19:35Z")
In the current 4.2 branch my colleague and I found the following bug.IT seems to be recently introduced with Update Momentum Trends to Work with Split Explicit Timestepping (6a1e8701) · Commits · NEMO Workspace / Nemo · … --- ## [Permanent junior oceanographer position for our operational team at NOW Systems (Madrid)](https://nemo-ocean.discourse.group/t/permanent-junior-oceanographer-position-for-our-operational-team-at-now-systems-madrid/936)
**Author:** [@ralnow](https://nemo-ocean.discourse.group/u/ralnow)\ **Replies:** 0\ **Last updated:** [5 August 2025 11:46 UTC](https://nemo-ocean.discourse.group/t/permanent-junior-oceanographer-position-for-our-operational-team-at-now-systems-madrid/936 "2025-08-05T11:46:56Z")
The Operations Team at NOW Systems in Madrid is seeking a skilled and motivated Junior Oceanographer to manage and monitor innovative operational ocean forecasting systems. This is a role with real-world impact, ideal fo… --- ## [Call for contributions to SWOT Ocean Model Intercomparison Project](https://nemo-ocean.discourse.group/t/call-for-contributions-to-swot-ocean-model-intercomparison-project/933)
**Author:** [@jlesommer](https://nemo-ocean.discourse.group/u/jlesommer)\ **Replies:** 0\ **Last updated:** [25 July 2025 13:14 UTC](https://nemo-ocean.discourse.group/t/call-for-contributions-to-swot-ocean-model-intercomparison-project/933 "2025-07-25T13:14:11Z")
Dear NEMO users, With this message, we would like to bring your attention to this new initiative that we are launching for fostering the assessment of (sub)mesoscale processes in ocean models in the context of the SWOT … --- ## [River runoff units](https://nemo-ocean.discourse.group/t/river-runoff-units/923)
**Author:** [@qtqw](https://nemo-ocean.discourse.group/u/qtqw)\ **Replies:** 2\ **Last updated:** [3 July 2025 12:30 UTC](https://nemo-ocean.discourse.group/t/river-runoff-units/923 "2025-07-03T12:30:30Z")
Variable sn\_rnf (river runoff) in runoff.nc files has the unit kg/(m²s). How can I convert runoff from m³/s to kg/(m²s) ? --- ## [Disabling Transport for Passive Tracers in NEMO v3.6 Coupled to FABM-ECOSMO E2E](https://nemo-ocean.discourse.group/t/disabling-transport-for-passive-tracers-in-nemo-v3-6-coupled-to-fabm-ecosmo-e2e/922)
**Author:** [@Hoa](https://nemo-ocean.discourse.group/u/Hoa)\ **Replies:** 0\ **Last updated:** [1 July 2025 17:06 UTC](https://nemo-ocean.discourse.group/t/disabling-transport-for-passive-tracers-in-nemo-v3-6-coupled-to-fabm-ecosmo-e2e/922 "2025-07-01T17:06:44Z")
Dear all, I am currently working with NEMO v3.6, coupled to ECOSMO E2E via FABM v1.0, and I would like to disable transport processes (advection, vertical and lateral diffusion) for specific passive tracers, such as fis… --- ## [\[v4.0.x\] Bug in poleward heat transport (variables \`sophtvtr\` and \`sopht\_vt\_bsn\`)](https://nemo-ocean.discourse.group/t/v4-0-x-bug-in-poleward-heat-transport-variables-sophtvtr-and-sopht-vt-bsn/227)
**Author:** [@yruprich](https://nemo-ocean.discourse.group/u/yruprich)\ **Replies:** 6\ **Last updated:** [30 June 2025 12:16 UTC](https://nemo-ocean.discourse.group/t/v4-0-x-bug-in-poleward-heat-transport-variables-sophtvtr-and-sopht-vt-bsn/227 "2025-06-30T12:16:48Z")
Hi all, I am using NEMOv4.0.4 and I am trying to output the zonally and depth integrated poleward heat transport, i.e. the variable called sophtvtr and also sopht\_vt\_bsn in case it is split per basin. NEMO is producing… --- ## [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… --- ## [Wrong seawater heat capacity unit in comment](https://nemo-ocean.discourse.group/t/wrong-seawater-heat-capacity-unit-in-comment/919)
**Author:** [@cpelletier](https://nemo-ocean.discourse.group/u/cpelletier)\ **Replies:** 0\ **Last updated:** [25 June 2025 10:47 UTC](https://nemo-ocean.discourse.group/t/wrong-seawater-heat-capacity-unit-in-comment/919 "2025-06-25T10:47:44Z")
Hello, I think the unit specified in comments for rcp here is wrong. IMO it should be \[J/(kg\*K)\], not \[J/K\]. The value is OK though. This has no implications whatsoever on the actual model, but I think it has some for … --- ## [Postdoctoral Opportunity – Wave and Sea Ice Coupling in Polar Oceans](https://nemo-ocean.discourse.group/t/postdoctoral-opportunity-wave-and-sea-ice-coupling-in-polar-oceans/917)
**Author:** [@smasson](https://nemo-ocean.discourse.group/u/smasson)\ **Replies:** 0\ **Last updated:** [23 June 2025 15:01 UTC](https://nemo-ocean.discourse.group/t/postdoctoral-opportunity-wave-and-sea-ice-coupling-in-polar-oceans/917 "2025-06-23T15:01:34Z")
Postdoctoral Opportunity – Wave and Sea Ice Coupling in Polar Oceans (LOCEAN, Paris, France) The NEMO team at LOCEAN (Paris, France) is seeking a motivated postdoctoral researcher for a 2-year position to contribute to … [Previous page](https://nemo-ocean.discourse.group/latest.md?page=1) [Next page](https://nemo-ocean.discourse.group/latest.md?page=3)