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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/gmd-2019-358
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2019-358
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: development and technical paper 24 Feb 2020

Submitted as: development and technical paper | 24 Feb 2020

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A revised version of this preprint was accepted for the journal GMD and is expected to appear here in due course.

Flex_extract v7.1 – A software to retrieve and prepare ECMWF data for use in FLEXPART

Anne Philipp1,2, Leopold Haimberger2, and Petra Seibert3 Anne Philipp et al.
  • 1Aerosol Physics & Environmental Physics, University of Vienna, Vienna, Austria
  • 2Department of Meteorology and Geophysics, University of Vienna, Vienna, Austria
  • 3Institute of Meteorology, University of Natural Resources and Life Sciences, Vienna, Austria

Abstract. Flex_extract is an open-source software package to efficiently retrieve and prepare meteorological data from the European Centre for Medium-Range Weather Forecasts (ECMWF) as input for the widely-used Lagrangian particle dispersion model FLEXPART and the related trajectory model FLEXTRA. ECMWF provides a variety of data sets which differ in a number of parameters (available fields, spatial and temporal resolution, forecast start times, level types etc.). Therefore, the selection of the right data for a specific application and the settings needed to obtain them are not trivial. Therefore, the data sets which can be retrieved through flex_extract by both authorised member state users and public users and their properties are explained. Flex_extract 7.1 is a substantially revised version with completely restructured software, mainly written in Python3, which is introduced with all input and output files and for the four different application modes. Software dependencies and the methods for calculating the native vertical velocity η̇, the handling of flux data and the preparation of the final FLEXPART input files are documented. Considerations for applications give guidance with respect to the selection of data sets, caveats related to the land-sea mask and orography, etc. Formal software quality assurance methods have been applied to flex_extract. It comes with a set of unit and regression tests as well as code metric data. A short description of the installation and usage of flex_extract as well as information about available detailed documentation is also provided.

Anne Philipp et al.

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Anne Philipp et al.

Model code and software

Flex_extract v7.1: Software and documentation A. Philipp, L. Haimberger, and P. Seibert https://doi.org/10.25365/phaidra.130

Anne Philipp et al.

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Latest update: 19 Oct 2020
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Short summary
Flex_extract v7.1 is an open-source software to retrieve and prepare meteorological fields from the European Centre for Medium-Range Weather Forecasts (ECMWF) MARS archive to serve as input for the FLEXTRA/FLEXPART atmospheric transport modelling system. It can be used by public as well as authorised member state users and enables the retrieval of a variety of different data sets, including the new reanalysis ERA5. Instructions are given for installation along with typical usage scenarios.
Flex_extract v7.1 is an open-source software to retrieve and prepare meteorological fields from...
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