# \#openifs-physics-parametrizations **URL:** https://forum.ecmwf.int/tag/openifs-physics-parametrizations/170.md [Latest](https://forum.ecmwf.int/latest.md) · [Categories](https://forum.ecmwf.int/categories.md) · [Tags](https://forum.ecmwf.int/tags.md) --- ## [Skin-temp vs SST vs soil temp](https://forum.ecmwf.int/t/skin-temp-vs-sst-vs-soil-temp/12123)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 3\ **Last updated:** [23 January 2026 09:57 UTC](https://forum.ecmwf.int/t/skin-temp-vs-sst-vs-soil-temp/12123 "2026-01-23T09:57:42Z")
Good morning I've been running some OpenIFS experiments at Tco95 L91. As usual OpenIFS reads soil temp at level 1 (STL1), sea ice fraction (CI) etc from the ICMCL file. My question is: Should the soil temp at level 1 (… --- ## [How are fields sent from radintg.F90 to radiation\_scheme.F90?](https://forum.ecmwf.int/t/how-are-fields-sent-from-radintg-f90-to-radiation-scheme-f90/12174)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 1\ **Last updated:** [1 May 2023 08:28 UTC](https://forum.ecmwf.int/t/how-are-fields-sent-from-radintg-f90-to-radiation-scheme-f90/12174 "2023-05-01T08:28:14Z")
Good afternoon I'm working on putting in the MACv2-SP aerosol properties in OpenIFS. This requires computing aerosol optical depth in a separate routine and sending to the radiation scheme, ecRAD. I'm reading in data… --- ## [Output CO2 or aerosol concentrations & optical depth](https://forum.ecmwf.int/t/output-co2-or-aerosol-concentrations-optical-depth/12176)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 1\ **Last updated:** [30 March 2023 17:09 UTC](https://forum.ecmwf.int/t/output-co2-or-aerosol-concentrations-optical-depth/12176 "2023-03-30T17:09:06Z")
Good afternoon I'm using OpenIFS 43r3v2 and I'd like to be able to output concentrations of greenhouse gases and aerosols. It would also be great to output aerosol optical depth for a few spectral bands. I went into yo… --- ## [Surface roughness on a aqua-planet simulation](https://forum.ecmwf.int/t/surface-roughness-on-a-aqua-planet-simulation/12153)
**Author:** [@Clement\_Bouvier](https://forum.ecmwf.int/u/Clement_Bouvier)\ **Replies:** 1\ **Last updated:** [20 October 2022 10:17 UTC](https://forum.ecmwf.int/t/surface-roughness-on-a-aqua-planet-simulation/12153 "2022-10-20T10:17:54Z")
Hello everyone I'm seeking to perform sensitivity experiments where the surface roughness is changed on a aqua-planet simulation (idealise case) without triggering the wave model (LWCOU or LWCOU2W). My first intuiti… --- ## [Output of O3 concentrations used by radiation, ecRad](https://forum.ecmwf.int/t/output-of-o3-concentrations-used-by-radiation-ecrad/12166)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 0\ **Last updated:** [22 June 2022 13:02 UTC](https://forum.ecmwf.int/t/output-of-o3-concentrations-used-by-radiation-ecrad/12166 "2022-06-22T13:02:36Z")
Good afternoon all I'd like to ask about a problem that's been bugging me for a few days now: Is there a way to write the O3 concentrations used by the radiation scheme to output? Some background: By default, OpenIFS u… --- ## [Aerosol effects in OpenIFS 43r3?](https://forum.ecmwf.int/t/aerosol-effects-in-openifs-43r3/12150)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 7\ **Last updated:** [8 April 2022 09:13 UTC](https://forum.ecmwf.int/t/aerosol-effects-in-openifs-43r3/12150 "2022-04-08T09:13:12Z")
Good morning I've been digging into understanding how aerosols are treated in OpenIFS 43r3v1. Some output from my NODE file is at the end of this post. My questions boil down to: 1) Is there any treatment of aerosol i… --- ## [How is runoff computed over the Antarctic ice sheet?](https://forum.ecmwf.int/t/how-is-runoff-computed-over-the-antarctic-ice-sheet/12135)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 5\ **Last updated:** [11 November 2021 10:57 UTC](https://forum.ecmwf.int/t/how-is-runoff-computed-over-the-antarctic-ice-sheet/12135 "2021-11-11T10:57:46Z")
Good afternoon, everyone! I'm running a coupled OpenIFS 43r3 + NEMO ORCA05 model with a runoff mapper similar to that of EC-Earth. The runoff mapper collects surface and sub-surface runoff from HTESSEL and eventually… --- ## [QBO and non-orographic wave drag](https://forum.ecmwf.int/t/qbo-and-non-orographic-wave-drag/12162)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 7\ **Last updated:** [8 July 2021 22:46 UTC](https://forum.ecmwf.int/t/qbo-and-non-orographic-wave-drag/12162 "2021-07-08T22:46:39Z")
Good morning all I've made some runs with Tco95L91 coupled to an NEMO (ORCA05) ocean and started investigating some of the biases. One thing that pops up is a strange behaviour of the QBO (see Figure). I reproduced Fig… --- ## [What is RVOLVSPEC used for?](https://forum.ecmwf.int/t/what-is-rvolvspec-used-for/12180)
**Author:** [@Glenn\_Carver](https://forum.ecmwf.int/u/Glenn_Carver)\ **Replies:** 1\ **Last updated:** [2 July 2021 21:25 UTC](https://forum.ecmwf.int/t/what-is-rvolvspec-used-for/12180 "2021-07-02T21:25:17Z")
I've noticed in some namelists I'm using the value of RVOLVSPEC changes. Looking at the code this appears to be related to the volcanic aerosol optical path. Is that correct? Thanks, R. --- ## [Smoother orography in OpenIFS](https://forum.ecmwf.int/t/smoother-orography-in-openifs/12106)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 5\ **Last updated:** [18 November 2020 14:23 UTC](https://forum.ecmwf.int/t/smoother-orography-in-openifs/12106 "2020-11-18T14:23:24Z")
Hi I'd like to do a sensitivity experiment with OpenIFS 43r3 using smoother orography. The plan is to use Tco199 but use orography at either Tco95 or coarser resolution. Since the input file "sporog" is spectral, I'… --- ## [Negative humidity fixer](https://forum.ecmwf.int/t/negative-humidity-fixer/12096)
**Author:** [@Try\_Gve](https://forum.ecmwf.int/u/Try_Gve)\ **Replies:** 1\ **Last updated:** [20 March 2020 13:20 UTC](https://forum.ecmwf.int/t/negative-humidity-fixer/12096 "2020-03-20T13:20:45Z")
Hi. We are doing a "sensitivity analysis" exercise investigating the impact on turning on and off various parametrization schemes in the OpenIFS framework. In that regards, I have played around with the Negative Humidity… --- ## [Surface conditions in AMIP runs](https://forum.ecmwf.int/t/surface-conditions-in-amip-runs/12192)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 6\ **Last updated:** [4 November 2019 03:35 UTC](https://forum.ecmwf.int/t/surface-conditions-in-amip-runs/12192 "2019-11-04T03:35:00Z")
Hi I was wondering about AMIP-style runs with OpenIFS. About a year ago, Glenn sent me a set of ICMCL files (from prepIFS I think) that I use to give OpenIFS a surface condition when running. These files include skin-t… --- ## [Tuning autoconversion, entrainment, non-oro drag](https://forum.ecmwf.int/t/tuning-autoconversion-entrainment-non-oro-drag/12116)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 2\ **Last updated:** [23 July 2019 11:54 UTC](https://forum.ecmwf.int/t/tuning-autoconversion-entrainment-non-oro-drag/12116 "2019-07-23T11:54:36Z")
Good morning all I've got some pesky model biases in both OpenIFS cy40 standalone (AMIP-type runs) and OpenIFS coupled to NEMO (piControl). Too much precipitation over the western tropical Pacific, warm SST bias over th… --- ## [Evaporation explosion](https://forum.ecmwf.int/t/evaporation-explosion/12141)
**Author:** [@Stephan\_Thober](https://forum.ecmwf.int/u/Stephan_Thober)\ **Replies:** 4\ **Last updated:** [1 April 2019 15:58 UTC](https://forum.ecmwf.int/t/evaporation-explosion/12141 "2019-04-01T15:58:26Z")
I am using OpenIFS CY43R1 to simulate the AMORE-France region. I set up the model using the EartH2Observe dataset and run it with ERAI forcing for the period 1995 to 2004. Some months into the simulation, at the beginnin… --- ## [Problem in writing heat and water fluxes to output](https://forum.ecmwf.int/t/problem-in-writing-heat-and-water-fluxes-to-output/12197)
**Author:** [@Joakim\_Kjellsson](https://forum.ecmwf.int/u/Joakim_Kjellsson)\ **Replies:** 3\ **Last updated:** [24 August 2018 19:45 UTC](https://forum.ecmwf.int/t/problem-in-writing-heat-and-water-fluxes-to-output/12197 "2018-08-24T19:45:24Z")
Hi all I'm running OpenIFS CY40R1 at T159 resolution and writing data every 6 hours. The output includes heat fluxes (SSR, STR, SSHF, SLHF) and water fluxes (E,TP). I've also got this in my namelist &NAMPPC LRSA… --- ## [Windstresses over sea ice](https://forum.ecmwf.int/t/windstresses-over-sea-ice/12194)
**Author:** [@Jan\_Streffing](https://forum.ecmwf.int/u/Jan_Streffing)\ **Replies:** 3\ **Last updated:** [15 June 2018 16:45 UTC](https://forum.ecmwf.int/t/windstresses-over-sea-ice/12194 "2018-06-15T16:45:33Z")
Good morning, I would like to calculate the wind stresses over sea ice in order to send them to the coupler and the ocean model I'm using. The ocean model I use expects the windstresses over sea ice to be scaled down by… --- ## [Model timestep choice and impact on low cloud](https://forum.ecmwf.int/t/model-timestep-choice-and-impact-on-low-cloud/12148)
**Author:** [@Glenn\_Carver](https://forum.ecmwf.int/u/Glenn_Carver)\ **Replies:** 2\ **Last updated:** [10 October 2017 15:34 UTC](https://forum.ecmwf.int/t/model-timestep-choice-and-impact-on-low-cloud/12148 "2017-10-10T15:34:52Z")
I'm using OpenIFS 40r1 for some long integrations. I have been testing using a different model timestep but found that the amount of low cloud simulated by the model is sensitive to the timestep. I'm using the recommende… --- ## [3D cloud layer in OpenIFS (CALLPAR.F90)](https://forum.ecmwf.int/t/3d-cloud-layer-in-openifs-callpar-f90/12098)
**Author:** [@Marston\_Ward](https://forum.ecmwf.int/u/Marston_Ward)\ **Replies:** 5\ **Last updated:** [30 August 2017 12:06 UTC](https://forum.ecmwf.int/t/3d-cloud-layer-in-openifs-callpar-f90/12098 "2017-08-30T12:06:21Z")
Hey! I was wondering is you could verify that OpenIFS Cy40r1 callpar.F90 can produce cloud fraction (3D or layered) that are greater than 1.0? I've been seeing values as high as 1.43 and I find this very strange? If … --- ## [Auto-conversion rate](https://forum.ecmwf.int/t/auto-conversion-rate/12137)
**Author:** [@Victoria\_Sinclair](https://forum.ecmwf.int/u/Victoria_Sinclair)\ **Replies:** 2\ **Last updated:** [15 April 2016 15:37 UTC](https://forum.ecmwf.int/t/auto-conversion-rate/12137 "2016-04-15T15:37:36Z")
A group of our students have been running the convection case study experiments (described here Convection case studies) and have changed to auto-conversion rate as described at the bottom of this page. Their results, an… --- ## [Relative humidity in OpenIFS output](https://forum.ecmwf.int/t/relative-humidity-in-openifs-output/12198)
**Author:** [@Victoria\_Sinclair](https://forum.ecmwf.int/u/Victoria_Sinclair)\ **Replies:** 4\ **Last updated:** [28 January 2016 16:18 UTC](https://forum.ecmwf.int/t/relative-humidity-in-openifs-output/12198 "2016-01-28T16:18:20Z")
In my output from one of the convection case study examples (expid g4a4) I find values of relative humidity \> 100%. This is the case even when I output the values on model levels. The values larger than 100% all occur in…