Short description of the VADYldai-Tool
The project VADY1 – part DLR2 – deals with the representation of the atmospheric dynamics in the MiKlip model by looking at the activity of atmospheric waves. Therefore, a process-oriented and easy-to-calculate variable called LDAI (large-scale dynamical activity index) was developed. It is especially for travelling planetary waves. Details can be looked up in (Wuest et al.) .
The program works as follows: For using VADYldai you need temperature data on pressure levels. That is the only input the tool requires. Choose the project, product, institute, model and experiment. For further information use the help command (freva --plugin ldai --help). In the preset dryrun mode, it creates a list of the input data which are usable for the tool. Then run the program.
model=mpi-esm-lr experiment=decs4e2000 ensemble=r1i1p1
Please make sure that the data of your interest are not already calculated and ﬁndable trough freva or via https://www-miklip.dkrz.de/?login_required=1&next=/solr/data-browser/ (see also 1).
If input data are found, run the program without the dryrun option again:
model=mpi-esm-lr experiment=decs4e2000 ensemble=r1i1p1 dryrun=‘‘FALSE’’
To run a whole decade for one ensemble member the procedure will take aprox. 6 hours. For further information use the help command (freva --plugin ldai --help).
|MiKlip model||Baseline 0||Baseline 1||Prototype/||Prototype/|
|period||decade 1999||1969 to 2013||1969 to 2013||1969 to 2013|
|ensemble runs||1 to 3||1 to 10||1 to 15||1 to 15|
|number of levels||17||24||24||24|
|Time range||1979 to 2011||1979 to 2011||1979 to 2010||1979 to 2010|
|number of levels||22||24||22||24|
The calculated ﬁles can be found in your evaluation system folder e. g.:
You get a netcdf ﬁle which includes the results of the LDAI for all the vertical level and the horizontal resolution you have choosen before. Due to speciﬁc analysis reasons (see ) it is recommendable to calculate a zonal mean of your results (for example with cdo zonmean inputfile outputfile). Figure 1 shows a typical example. For plotting the results or calculating skill scores please use other available tools.
S. Wüst, K. Piecha, R. Kramer, M. Bittner, J.-H. Yee, M. G. Mlynczak, and J. M. Rusell III. Investigating atmospheric waves in ECHAM6 - Part I: Introduction of two process-oriented indices for validation. in preparation.
S. Wüst, K. Piecha, R. Kramer, M. Bittner, J.-H. Yee, M. G. Mlynczak, and J. M. Rusell III. Investigating atmospheric waves in ECHAM6 - Part II: Application of two process-oriented indices for validation. in preparation.