What's new in release 4.0

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TM5v4 was released on October 4th, 2013. It is a frozen copy of revision #4961 (see commits 4962-4971). The following projects were released: base, chem/base, user_output, most of the levels, and budget.

Contents

DATA

New sets of data required for full chemistry model: EDGAR4.1, EDGAR 4.2, AR5, GFED3, MACC for natural emissions, HYMN/LPJG for CH4 natural emissions. These data sets replace the GEMS and GFED2 of version 3.

CODE

At interface/structure level

Note that these features do not change the results.

Required libraries: no need for pnetcdf anymore. We rely on netcdf4 instead. To output timeseries and use restart files, netcdf-4 must be installed with parallel i/o enabled.

Base

  "Effect is only visible over sea and mixed land/sea pixels; friction
  velocity u* decreases with about 9% and surface roughness with about 16% .
  Also included a minimum value for u* to avoid division by zero in rare case
  that the surface stress is zero, which was observed at least once for a
  grid cell over Antartica (MK)." AJS
  
  Impact: "probably very small"


Chemistry

 before : g_n2o5_i=0.01, g_n2o5_l=0.04
 now    : g_n2o5_i=0.02, g_n2o5_l=0.02
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