v1.7

• Modified met_sample to work with geopotential heights.
• Added quantity flags to extract horizontal wid and vertical velocities.
• Allow for different grid spacing of geopotential data.
• Added code to calculate tropopause.
• Added low-pass filter to downsampling code.
• Changed standard pressure for calculation of potential temperature.
• Fixed initialization of random number generators.
• Revised code to calculate PV on pressure levels.
• Modified approach to calculate RQTDs and RTCEs in dist tool.
• Added coordinate check when reading netCDF files.
• Added code to read CLaMS netCDF files.
• Added code for downsampling of meteo data.
• Added tool to convert between atmospheric data file formats.
• Added code to calculate tracer conservation errors in dist tool.
• Added relative transport deviations for quantities in dist tool.
• Tuning of dist and trac tool.
• Minor performance improvement of sedi module.
• Bugfix dist, met_zm and met_prof tools.
• Removed unused quantities.
• Extended Makefile to allow for compilation on KNL.
• Added option to strip binaries to Makefile.

v1.6

• Added binary I/O for atmospheric data.
• Removed position checks from init tool.
• Fixed check of CFL criterion.
• Added code to stage meteorological data.
• Extended read_met function for ERA5 data.
• Added check for CFL criterion.
• Added low-level wind components to meteo diagnostics.
• Added new tool for k-means clustering of trajectories.
• Added boundary conditions and options for evenly distribution to init tool.
• Added HNO3 climatology for PSC diagnostics.
• Added gravity wave diagnostics to meteo module.
• Modification of timers in the trac tool.
• Updates center, dist, meteo, trac and wind tool.

v1.5

• Added module to gather PSC data.
• Added code to estimate T_ice and T_NAT.
• Added time filter for air parcel data.
• Added code to calculate potential vorticity.
• Output of surface pressure in profile data.

v1.4

• Added code to read meteo data on model levels.
• Allow for meteo data at -180..+180 or 0..360 degrees.
• Implemented different options to get surface pressure.
• Removed nearest neighbor and cubic interpolation schemes.
• Added profile output.
• Revised grid and sample output.
• Use fixed units for known quantities.
• Removed sampling code.
• Added example script.

v1.3

• Read time information from meteo data filenames.
• Added different interpolation schemes for meteorological data.
• Added new tool to calculate zonal means of meteo data.
• Bugfix isosurface module.
• Update Smagorinsky code.
• Revised grid output.

v1.2

• Added new tool to sample meteorological data files.
• Added new tool to calculate deviations of trajectories.
• Added code to force air parcels to balloon pressure levels.
• Added code to restrict trajectories to isosurfaces.
• Added code to create periodic boundary conditions for meteorological data.
• Added code to get zonal mean tropopause pressure from NCAR/NCEP climatology.
• Modified parameter names for the split tool.

v1.1

• Added tool to create synthetic wind fields.
• Revisions based on Thomas's thesis.

v1.0

• This is an initial version of the MPTRAC model.