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# Purpose, Description
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This is the flux calculator component of the IOW ESM.
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All coupling fields that are communicated between atmospheric and bottom models are passed through or calculated by this component.
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The commnuicated information is mapped from the models' grid to the exchange grid and vice versa.
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# Authors
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* SK (sven.karsten@io-warnemuende.de)
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* HR (hagen.radtke@io-warnemuende.de)
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# Versions
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## 1.03.00 (latest release)
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| date | author(s) | link |
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|--- |--- |--- |
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| 2023-07-24 | SK | [1.03.00](https://git.io-warnemuende.de/iow_esm/components.flux_calculator/src/branch/1.03.00) |
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<details>
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### changes
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* enable bias corrections for exchanged fluxes
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* currently only the evaporation flux can be corrected in an additive fashion
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* however, module `bias_corrections` can be easily extended
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* correction is applied as anual cycle, i.e. for each month there should be a correction file (NetCDF) that contains
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a field that is added to the actual flux
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* these files must be placed in folder called `corrections` that is placed in the input folder called `flux_calculator`
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* the files must be named `mass_evap-MM.nc` for the evaporation correction
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* the `MM` indicates the month and goes from `01` to `12`
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* the Fortran code can now call python routines via the Fortrasn module `call_python`
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* currently this used to calculate the current month from the initial start time and the current time step
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*build script templates for new target machine have been added
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### dependencies
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* OASIS3-MCT libraries
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* see build scripts for more dependencies
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### known issues
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* none so far
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### tested with
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* intensively tested on both HLRN machines
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* using example setups available under:
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(coupled) /scratch/usr/mviowmod/IOW_ESM/setups/
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MOM5_Baltic-CCLM_Eurocordex/example_8nm_0.22deg/1.00.00
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and https://zenodo.org/record/8167743/files/1.00.00.tar.gz (https://doi.org/10.5281/zenodo.8167743)
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* can be built and run on Haumea but output is not intensively tested
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</details>
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<details>
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<summary><b><i>older versions</i></b></summary>
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## 1.02.00
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| date | author(s) | link |
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|--- |--- |--- |
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| 2022-12-22 | SK | [1.02.00](https://git.io-warnemuende.de/iow_esm/components.flux_calculator/src/branch/1.02.00) |
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<details>
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### changes
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* fluxes can now be calculated according to
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* the MOM5 ocean model (formulars the same as in CCLM but with different transfer coefficients)
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* the RCO ocean model, Meier et al., SMHI REPORTS OCEANOGRAPHY No. 26, August 1999
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* caution this is still a bit experimental
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### dependencies
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* OASIS3-MCT libraries
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* see build scripts for more dependencies
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### known issues
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* none so far
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### tested with
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* intensively tested on both HLRN machines
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* using example setups available under:
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(coupled) /scratch/usr/mviowmod/IOW_ESM/setups/
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MOM5_Baltic-CCLM_Eurocordex/example_8nm_0.22deg/1.00.00
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* can be built and run on Haumea but output is not intensively tested
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</details>
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## 1.01.00
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| date | author(s) | link |
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|--- |--- |--- |
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| 2022-05-31 | SK | [1.01.00](https://git.io-warnemuende.de/iow_esm/components.flux_calculator/src/branch/1.01.00) |
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<details>
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### changes
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* flux calculator can now run in parallel
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* each flux calculator instance is responsible only for a small part of the exchange grid
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### dependencies
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* OASIS3-MCT libraries
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* see build scripts for more dependencies
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### known issues
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* none so far
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### tested with
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* intensively tested on both HLRN machines
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* using example setups available under:
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(coupled) /scratch/usr/mviowmod/IOW_ESM/setups/
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MOM5_Baltic-CCLM_Eurocordex/example_8nm_0.22deg/1.00.00
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* can be built and run on Haumea but output is not intensively tested
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</details>
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## 1.00.00
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| date | author(s) | link |
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|--- |--- |--- |
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| 2022-01-28 | SK, HR | [1.00.00](https://git.io-warnemuende.de/iow_esm/components.flux_calculator/src/branch/1.00.00) |
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<details>
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### changes
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* initial release
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* flux calculator can couple MOM5 ocean model and CCLM atmospheric model
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* usinf the input file `flux_calculator.nml` it can create a namcouple file that is used by the OASIS3 coupler
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### dependencies
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* OASIS3-MCT libraries
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* see build scripts for more dependencies
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### known issues
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* none so far
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### tested with
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* intensively tested on both HLRN machines
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* using example setups available under:
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(coupled) /scratch/usr/mviowmod/IOW_ESM/setups/
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MOM5_Baltic-CCLM_Eurocordex/example_8nm_0.22deg/1.00.00
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* can be built and run on Haumea but output is not intensively tested
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</details>
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</details>
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