Output files
############

LMDZ-SACS output files are all saved in NetCDF format (execpt trajectory files which are save in raw binary format for I/O speed).

Log file
========

* ``dispersion.log``: log file created by CIF, containing information about the simulation, and eventual error messages

Observation file
================

* ``obs_out.nc``: observation information, for forward and tangent linear only

  - ``spec`` variable: simulated mixing ratio in :math:`\mu`mol/mol (ppm)
  - ``incr`` variable: simulated mixing ratio increments in :math:`\mu`mol/mol (ppm)
  - ``pressure`` variable: simulated pressure at the middle of the cell (Pa)
  - ``dpressure`` variable: simulated pressure thickness of the cell (Pa)
  - ``airm`` variable: level thickness (m)
  - ``hlay`` variable: dry air density (molec/cm\ :sup:`3`)

Tracers related fields files
============================

Initial conditions files
------------------------

* ``restart.nc``: mass mixing ratio for all tracers at the end of the simulation, in kg of species per kg of dry air.

  - ``[species]`` (lev, lat, lon) or (lev, cell) variable: mass mixing ratio, for forward and tangent linear only
  - ``[species]_tl`` (lev, lat, lon) or (lev, cell) variable: mass mixing ratio, for tangent linear only
  - ``[species]`` (lev, lat, lon) or (lev, cell) variable: mass mixing ratio sensitivity, for adjoint only

Emissions files
---------------

* ``flux_out.nc``: tracers surface emissions sensitivities

  - ``[species]`` (time, lat, lon) or (time, cell) variable: emissions sensitivities, for adjoint only

Trajectory files
----------------

* ``trajq_[species].bin``: 3 hourly tracers trajectory saved by the forward model, in kg of species per kg of dry air, for forward and tangent linear only

Chemistry files
===============

Prescribed concentrations files
-------------------------------

* ``prescrconcs_out.nc``: daily 3D fields of prescribed concentrations sensitivities

  - ``[species]`` (time, lev, lat, lon) or (time, lev, cell) variable: prescribed concentrations sensitivities, for adjoint only

Production and loss files
-------------------------

* ``prodloss3d_out.nc``: daily 3D fields of production/loss concentrations sensitivities

  - ``[species]`` (time, lev, lat, lon) or (time, lev, cell) variable: production/loss concentrations sensitivities, for adjoint only