Difference between revisions of "The z2sig.def Input File"
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| − | The z2sig.def file contains the pseudo-altitudes (in km) at which the user wants to set the vertical levels. Note that levels should be unevenly spread, with a higher resolution near the surface in order to capture the rapid variations of variables there. It is recommended to use the altitude levels as set in the ''z2sig.def'' file provided in the ''deftank'' directory. | + | The z2sig.def file contains the pseudo-altitudes (in km) at which the user wants to set the vertical levels. Note that levels should be unevenly spread, with a higher resolution near the surface in order to capture the rapid variations of variables there. It is recommended to use the altitude levels as set in the ''z2sig.def'' file provided in the ''deftank'' directory. If you want to change vertical resolution, check [[Advanced_Use_of_the_GCM#What_you_need_to_know_about_the_z2sig.def_file | there]]. For a detailed description of model levels refer to the [[PCM vertical coordinate|PCM vertical coordinate page]]. |
| − | == Example of ''z2sig.def'' file: == | + | == Example of ''z2sig.def'' file (here for an Earth-like simulation): == |
<pre> | <pre> | ||
| − | 8 | + | 8 H: atmospheric scale height (km) (used as a reference only) |
| − | 0.004 | + | 0.004 Typical pseudo-altitude (m) for 1st layer (z=H*log(sigma)) |
| − | 0.017415589434569632 | + | 0.017415589434569632 ,, ,, ,, ,, ,, ,, ,, ,, ,, 2nd layer, etc... |
0.04197041134830409 | 0.04197041134830409 | ||
0.09573548831202484 | 0.09573548831202484 | ||
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'''Note''': Lines beginning with a hashtag are not read | '''Note''': Lines beginning with a hashtag are not read | ||
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| + | [[Category:Inputs]] | ||
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| + | [[Category:Generic-Model]] | ||
Latest revision as of 11:35, 6 March 2025
The z2sig.def file contains the pseudo-altitudes (in km) at which the user wants to set the vertical levels. Note that levels should be unevenly spread, with a higher resolution near the surface in order to capture the rapid variations of variables there. It is recommended to use the altitude levels as set in the z2sig.def file provided in the deftank directory. If you want to change vertical resolution, check there. For a detailed description of model levels refer to the PCM vertical coordinate page.
Example of z2sig.def file (here for an Earth-like simulation):
8 H: atmospheric scale height (km) (used as a reference only) 0.004 Typical pseudo-altitude (m) for 1st layer (z=H*log(sigma)) 0.017415589434569632 ,, ,, ,, ,, ,, ,, ,, ,, ,, 2nd layer, etc... 0.04197041134830409 0.09573548831202484 0.19905425549248695 0.37769312558816376 0.6610287582071787 1.0796026837077486 1.6625722655258326 2.4354958342473516 3.4187160120951323 4.626429653543951 6.066400344124698 7.740192276155182 9.643775222138789 11.768354425931134 14.10130177147987 17. 20. 23. 26.5 30. 34. 38. 42. 47. 52. 60. 68. 76. 82. 88. 94. 100. 105. 110. 115. 120. 125. 130.
Note: Lines beginning with a hashtag are not read
