CLM experiment plan

• The regional climate of the past decades of the 20th century (1960-2000) is forced by different realization runs of the global model:
  For the actual climate of the 20th century the global forcing that drives the regional model is based on the same control run, but set off at three different initialization times. This gives three different realizations of the present climate (realization runs _1, _2, _3 in table below).
• The regional climate of the future decades (2001-2100) is forced by different climate scenario runs of the global model:
  The regional climate of the 21st century is modelled with CLM with respect to two IPCC-climate scenarios (A1B and B1) with different assumptions regarding the development of global greenhouse gas concentrations in the future (see short description and link below). Each scenario A1B and B1 connects to two realization runs of the 20th century (denoted by _1 und _2 in the table below) Please note that the possible climate scenario A2 is not included in the CLM experiment runs so far.
  Possible climate scenario A1B in brief: This scenario describes a possible future world of very rapid economic growth, global population peaking in mid-century and rapid introduction of new and more efficient technologies. A balance across all energy sources is assumed.
  Possible climate scenario B1 in brief: In this possible scenario a change in economic structures towards a service and information economy is assumed with introduction of clean and resource-efficient technologies. The development of global population is assumed to peak in mid-century like in scenario A1B.
(see i.e. http://www.grida.no/climate/ipcc/ for more details of the IPCC possible climate scenarios)

The table below lists the planned CLM model runs (experiments) and gives their current process status.

PLEASE NOTE: Due to an update of the CLM model configuration, the simulation runs had to be started again in September 2006. Consequently, the publication of model data on both grids has to be postponed. More information on the model update will be given as soon as possible on our NEWS page.

In the table below you will find the new schedule for the revised model runs.

 Please note:

• The quality control and syntactic checks of the data are finished.
• Every user is expected to announce any noticable problems to sga(at)dkrz.de