.. _nextGEMS_prefinal:

nextGEMS pre-final
------------------

The nextGEMS pre-final simulations build on cycle 3 experience plus adaptations for multi-decadal experiments.
This includes improvements in the configuration (updated schemes and features) and some changes in the output.
The simulations will be analyzed during the 4th km-scale hackathon in Hamburg in March 2024.

As before, pre-final simulations can be accessed through the nextGEMS intake catalog:

.. code-block:: python

   import intake
   cat = intake.open_catalog("https://data.nextgems-h2020.eu/catalog.yaml")


IFS-FESOM
=========

IFS_9-FESOM_5-production
   | 2020-2050
   | output on 2 healpix levels, regular 0.25 deg, and native grid
   | :code:`cat.IFS.IFS_9-FESOM_5-production`



ICON
====

The ICON simulations use hierarchical HEALPix output. Please have a look at the introduction on :ref:`hierarchical_healpix_output` for advice on data access.

**TL;DR;** Take ``ngc4008`` for the run with the latest fixes and adjustments.

If you need a longer run, take ``ngc4006`` (15 a) or ``ngc4008`` (10 a, possibly extended;in progress)

For a quick look at results and output available, see

* `Global mean time-series <https://swift.dkrz.de/v1/dkrz_b381d76e-63d7-4aeb-96f0-dfd91e102d40/nextgems_prefinal/index.html>`_
* `Atmospheric quickplots <https://swiftbrowser.dkrz.de/public/dkrz_cc566461dff84e59964ced89d96324d8/ngc4/>`_
* Oceanic quickplots (`ngc4008 <https://swift.dkrz.de/v1/dkrz_07387162e5cd4c81b1376bd7c648bb60/helmuth/all_qps/NextGems/qp-ngc4008/qp_index.html>`_, `ngc4007 <https://swift.dkrz.de/v1/dkrz_07387162e5cd4c81b1376bd7c648bb60/helmuth/all_qps/NextGems/qp-ngc4007/qp_index.html>`_, `ngc4006 <https://swift.dkrz.de/v1/dkrz_07387162e5cd4c81b1376bd7c648bb60/helmuth/all_qps/NextGems/qp-ngc4006/qp_index.html>`_, `ngc4005 <https://swift.dkrz.de/v1/dkrz_07387162e5cd4c81b1376bd7c648bb60/helmuth/all_qps/NextGems/qp-ngc4005/qp_index.html>`_)
* `Output overview chart <https://swift.dkrz.de/v1/dkrz_b381d76e-63d7-4aeb-96f0-dfd91e102d40/nextgems_prefinal/nextgems_prefinal_output.html>`_

   All simulations can be found in ``cat.ICON``

ngc4005 [#]_:
   | `ssp370 <https://www.dkrz.de/en/communication/climate-simulations/cmip6-en/the-ssp-scenarios>`_ like scenario run from 2020
   |  ⚠ intermittent changes in output configuration
   |  ⚠ at model date 2024-04-01, sea-ice parameters were adjusted to yield more summer sea ice
   |  ⚠ contains a bug in the land surface energy balance

ngc4006 [#]_
   | continues ngc4005 until 2040, finalized output configuration. Same caveats apply

ngc4007 [#]_
   | restart ssp370-like scenario run from 2020. Includes *bug fix for land energy balance*, and a modification of the *cloud liquid inhomogeneity factor* to account for boundary layer clouds. Starts with the 2020 initial conditions like ngc4005, but the hydrological discharge model was re-adjusted using data from model year 2030 of ngc4006

ngc4008 [#]_
   | as ngc4007, but slightly retuned inhomogeneity factor
   | Severe issues in the sea ice cover (esp. visible in late 2025).

.. [#] `ngc4005 development info🔒 <https://gitlab.dkrz.de/icon/icon-mpim/-/issues/17>`_
.. [#] `ngc4006 development info🔒 <https://gitlab.dkrz.de/icon/icon-mpim/-/issues/57>`_
.. [#] `ngc4007 development info🔒 <https://gitlab.dkrz.de/icon/icon-mpim/-/issues/78>`_
.. [#] `ngc4008 development info🔒 <https://gitlab.dkrz.de/icon/icon-mpim/-/issues/59>`_

ngc3542
   | somewhere between cycle3 and pre-final
   | includes HAMOCC for ocean biogeochemistry
   | Output on the native grid