Changeset 08c9091 in flex_extract.git for For_developers/Sphinx/Source/quick_start.rst


Ignore:
Timestamp:
Aug 12, 2020, 8:47:31 AM (4 years ago)
Author:
Anne Philipp <anne.philipp@…>
Branches:
master, ctbto, dev
Children:
73308e0
Parents:
ee9aaec
Message:

updated online docu (rm tabs)

File:
1 edited

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  • For_developers/Sphinx/Source/quick_start.rst

    r6931f61 r08c9091  
    428428Vertical velocity           
    429429    The vertical velocity for ``FLEXPART`` is not directly available from MARS and has to be calculated.
    430     There are several options for this, and the following parameters are responsible for the selection.                 See :doc:`Documentation/vertco` for a detailed explanation. Using ``ETADIFF 1``, ``OMEGA 1`` and ``OMEGADIFF 1`` is recommended for debugging and testing only.
     430    There are several options for this, and the following parameters are responsible for the selection. See :doc:`Documentation/vertco` for a detailed explanation. Using ``ETADIFF 1``, ``OMEGA 1`` and ``OMEGADIFF 1`` is recommended for debugging and testing only.
    431431    Usually, one has to decide between ``GAUSS 1`` and ``ETA 1``. ``GAUSS 1`` means that spectral fields of the horizontal wind fields and the divergence are retrieved and that the vertical velocity is calculate using the continuity equation. ``ETA 1`` means that horizontal wind fields etadot are retrieved on a regular lat-lon grid. It is recommended to use ``ETA 1`` where possible, as there is a substantial computational overhead for solving the continuity equation.
    432432
     
    445445    The grid and domain parameters depends on each other. ``grid`` refers to the grid resolution. It can be given as decimal values (e.g., ``1.`` meaning 1.0°), or as in previous versions of flex_extract, as integer values refering to 1/1000 degrees (e.g., ``1000`` means also 1°). The code applies common sense to determine what format is to be assumed.
    446446    After selecting grid, the ``domain`` has to be defined. The extension in longitude or latitude direction must be an integer multiple of ``grid``.
    447    
    448                
     447
     448
    449449    The horizontal resolution for spectral fields is set by the parameter ``RESOL``. For information about how to select an appropriate value please read the explanation of the MARS keyword RESOL as found `in this entry of the ECMWF on-line documentation <https://confluence.ecmwf.int/display/UDOC/Post-processing+keywords#Post-processingkeywords-resol>`_ and  `this table (also ECMWF documentation) <https://confluence.ecmwf.int/display/UDOC/Retrieve#Retrieve-Truncationbeforeinterpolation>`_.
    450450   
     
    463463Flux data
    464464    Flux fields are always forecast fields and contain values of the fluxes accumulated since the start of the respective forecast. As certain re-analysis dataset cover all time steps with analysis fields, it was necessary to define a new parameter set for the definition of the flux fields. The following parameters are used specifically for flux fields. ``ACCTYPE`` is the field type (must be a type of forecast), ``ACCTIME``  the forecast starting time, and  ``ACCMAXSTEP`` the maximum forecast step;``DTIME`` the temporal resolution. ACCTYPE is assumed to be the same during the whole period given by ACCTIME and ACCMAXSTEP. These values will be set automatically if not provided in a ``CONTROL`` file.
    465            
     465
    466466    .. code-block:: bash
    467467       :caption: Example setting for the definition of flux fields.
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