IFS Documentation front page

I Observations
II Assimilation
III Dynamics
IV Physics
V Ensemble
VI Technical
VII Waves

Part VI: Technical and computational procedures

CHAPTER 2 FULL-POS post-processing and interpolation

This documentation describes the FULL-POS functionality of ARPEGE/IFS .

Table of contents

2.1 Post-processable fields.

2.1.1 3D dynamical fields (DYN3D).

2.1.2 2D dynamical fields (DYN2D).

2.1.3 Surface physical fields (PHYSOL) used both at METEO-FRANCE and ECMWF.

2.1.4 Additional surface physical fields (PHYSOL) used only at ECMWF.

2.1.5 Surface cumulated fluxes (CFU).

2.1.6 Surface instantaneous fluxes (XFU).

2.2 Other notations.

2.3 Horizontal interpolations.

2.3.1 Bilinear horizontal interpolations.

2.3.2 12 points horizontal interpolations.

2.3.3 Location of computations.

2.3.4 Plane geometry (ALADIN).

2.4 Vertical interpolations and extrapolations.

2.4.1 General considerations.

2.4.2 More details for 3D dynamical variables.

2.4.3 2D dynamical variables which need extrapolations.

2.5 Filtering in spectral space.

2.5.1 General considerations.

2.5.2 `THX' (ARPEGE) or bell-shaped (ALADIN) filtering on derivatives.

2.5.3 `Bell-shaped' filtering on non-derivative fields.

2.5.4 Additional `THX' filtering on all fields.

2.6 Post-processing files.

2.7 Organigram

2.7.1 Setup routines and arborescence above STEPO.

2.7.2 Grid-point computations.

2.7.3 Spectral transforms.

2.7.4 Spectral computations.

2.7.5 Action and brief description of each routine.

2.8 Sequences of calls of post-processing.

2.8.1 Vertical coordinates of post-processing.

2.8.2 Sequences of calls: general considerations.

2.8.3 Global spectral post-processed fields in the same horizontal geometry as the model geometry.

2.8.4 Global spectral post-processed fields in a horizontal geometry different from the model geometry.

2.8.5 Global grid-point post-processed fields in the same horizontal geometry or in a different horizontal geometry as the model geometry.

2.8.6 Spectral fit.

2.8.7 No spectral fit.

2.8.8 Grid-point post-processed fields in a ALADIN limited area domain.

2.8.9 Grid-point post-processed fields in a latitude-longitude limited area domain.

2.8.10 Mixed ARPEGE/IFS-ALADIN FULL-POS configurations: spectral post-processed fields in a limited area domain.

2.8.11 Pure ALADIN FULL-POS configurations.

2.9 Some shared memory features:

2.9.1 Calculations packets:

2.9.2 Transmission of data necessary for FULL-POS horizontal interpolations from HPOS to HPOSLAG: interpolation buffers.

2.10 Some distributed memory features:

2.10.1 Calculations packets:

2.10.2 Transmission of data necessary for FULL-POS horizontal interpolations from HPOS to HPOSLAG: interpolation buffers.

2.11 Parameter variables to be known:

2.11.1 Parameter PARFPOS.

2.12 Common/module and namelist variables to be known:

2.12.1 PTRFPB2.

2.12.2 YOM4FPOS.

2.12.3 YOMAFN.

2.12.4 YOMAFPB.

2.12.5 YOMAFPDS.

2.12.6 YOMCT0.

2.12.7 YOMDFPB.

2.12.8 YOMDIM.

2.12.9 YOMFP4.

2.12.10 YOMFP4L.

2.12.11 YOMFPC.

2.12.12 YOMFPD.

2.12.13 YOMFPF.

2.12.14 YOMFPG.

2.12.15 YOMFPIOS.

2.12.16 YOMFPOLE.

2.12.17 YOMFPOP.

2.12.18 YOMFPSC2.

2.12.19 YOMFPSC2B.

2.12.20 YOMFPSP.

2.12.21 YOMFPT0.

2.12.22 YOMIOS.

2.12.23 YOMMP.

2.12.24 YOMMPG.

2.12.25 YOMOP.

2.12.26 YOMPFPB.

2.12.27 YOMRFPB.

2.12.28 YOMRFPDS.

2.12.29 YOMSC2.

2.12.30 YOMVFP.

2.12.31 YOMVPOS.

2.12.32 YOMWFPB.

2.12.33 YOMWFPDS.

2.12.34 Additional namelists, containing local variables.

2.12.35 Pointer variables to be known:

Pointer PTRFP4.