kvrigor · Oct 6, 2026 · Oct 6, 2026 · Oct 6, 2026 · s-poll · Oct 7, 2026
diff --git a/CITATION.cff b/CITATION.cff
@@ -53,4 +53,4 @@ url: 'https://helmholtz.software/software/eclm'
 repository: 'https://hpscterrsys.github.io/eCLM'
 keywords:
   - 'land surface model, Earth system model, Fortran, HPC'
-license: MIT
+license: BSD-3-Clause
diff --git a/LICENSE b/LICENSE
@@ -1,37 +1,29 @@
+BSD-3-Clause License
+
 Copyright (c) 2020-2026, Centre for High-Performance Scientific Computing in Terrestrial Systems (HPSC TerrSys)
 Copyright (c) 2005-2018, University Corporation for Atmospheric Research (UCAR)
-All rights reserved.
 
-Developed by: Centre for High-Performance Scientific Computing in Terrestrial Systems (HPSC TerrSys)
-              https://www.hpsc-terrsys.de/en
-              
-              University Corporation for Atmospheric Research - National Center for Atmospheric Research
-              https://www2.cesm.ucar.edu/working-groups/sewg
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
 
-Permission is hereby granted, free of charge, to any person obtaining 
-a copy of this software and associated documentation files (the "Software"), 
-to deal with the Software without restriction, including without limitation 
-the rights to use, copy, modify, merge, publish, distribute, sublicense, 
-and/or sell copies of the Software, and to permit persons to whom 
-the Software is furnished to do so, subject to the following conditions:
+2. Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
 
-    - Redistributions of source code must retain the above copyright notice, 
-      this list of conditions and the following disclaimers.
-    - Redistributions in binary form must reproduce the above copyright notice, 
-      this list of conditions and the following disclaimers in the documentation 
-      and/or other materials provided with the distribution.
-    - Neither the names of [UCAR, HPSC TerrSys],
-      nor the names of its contributors may be used to endorse or promote 
-      products derived from this Software without specific prior written permission.
+3. Neither the name of the copyright holder nor the names of its contributors
+may be used to endorse or promote products derived from this software without
+specific prior written permission.
 
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
-ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
-LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
-POSSIBILITY OF SUCH DAMAGE.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
@@ -2,6 +2,7 @@
 
 [![helmholtz rsd](https://img.shields.io/badge/helmholtz.software-eclm-00a3e3)](https://helmholtz.software/software/eclm)
 [![latest tag](https://badgen.net/github/tag/HPSCTerrSys/eCLM)](https://github.com/HPSCTerrSys/eCLM/tags)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.17967419.svg)](https://doi.org/10.5281/zenodo.17967419)
 
 eCLM is based from [Community Land Model 5.0 (CLM5.0)]. It has the same modelling capabilities as CLM5 but with a more simplified infrastructure for build and namelist generation. The build system is handled entirely by CMake and namelists are generated through a small set of Python scripts. Only Fortran source codes necessary for a functional land model simulation were imported from CLM5. 
 
@@ -17,6 +18,20 @@ Feel free to post your questions and problems via the [issue tracker]. We also w
 
 For general inquiries, leave us a message on our [eCLM Matrix channel].
 
+## Citing
+
+If you use this software, please cite:
+
+```bibtex
+@software{eclm,
+ author = {Rigor, Paul and Poll, Stefan and González-Nicolás, Ana and Keller, Johannes and van Hulten, Marco and Caviedes-Voullieme, Daniel and Hendricks-Franssen, Harrie-Jan and Goergen, Klaus and Kollet, Stefan},
+  title = {enCore Community Land Model (eCLM)},
+   year = {2025},
+    url = {https://github.com/HPSCTerrSys/eCLM},
+    doi = {10.5281/ZENODO.17967419}
+}
+```
+
 [Community Land Model 5.0 (CLM5.0)]: https://github.com/ESCOMP/CTSM/tree/release-clm5.0
 [issue tracker]: https://github.com/HPSCTerrSys/eCLM/issues
 [pull requests]: https://github.com/HPSCTerrSys/eCLM/pulls

diff --git a/docs/INDEX.md b/docs/INDEX.md
@@ -46,3 +46,16 @@ Each time step the model solves the surface energy balance, water balance, and c
 Configuration of the CLM subgrid hierarchy. Box in upper right shows hypothetical subgrid distribution for a single grid cell. Note that the Crop land unit is only used when the model is run with the crop model active. Abbreviations: TBD – Tall Building District; HD – High Density; MD – Medium Density, G – Glacier, L – Lake, U – Urban, C – Crop, V – Vegetated, PFT – Plant Functional Type, Irr – Irrigated, UIrr – Unirrigated. Red arrows indicate allowed land unit transitions. Purple arrows indicate allowed patch-level transitions. From <a href="https://escomp.github.io/ctsm-docs/versions/release-clm5.0/html/tech_note/Ecosystem/CLM50_Tech_Note_Ecosystem.html#id14" target="_blank">CLM5 Technical Note</a>.
 ```
 
+## Citing
+
+If you use this software, please cite:
+
+```bibtex
+@software{eclm,
+ author = {Rigor, Paul and Poll, Stefan and González-Nicolás, Ana and Keller, Johannes and van Hulten, Marco and Caviedes-Voullieme, Daniel and Hendricks-Franssen, Harrie-Jan and Goergen, Klaus and Kollet, Stefan},
+  title = {enCore Community Land Model (eCLM)},
+   year = {2025},
+    url = {https://github.com/HPSCTerrSys/eCLM},
+    doi = {10.5281/ZENODO.17967419}
+}
+```