Hi Lewei,
Emanuel scheme in its default setting tends to give excessive rainfall. To overcome this you need to calibrate it for your region. Parameters that can be changed include elcrit, tlcrit, coeffr and cu in the namelist emanparam in param.F. For insight in how these parameters can be changed, see http://wind.mit.edu/~emanuel/home.html and retrieve related documents. Couple of peoples also detailled their calibrations here:http://onlinelibrary.wiley.com/doi/10.1002/joc.1681/pdfhttp://journals.ametsoc.org/doi/abs/10.1175/2009JCLI2388.1Good luck,
cheers!
***************************************************
Mouhamadou Bamba SYLLA, PhD
Post-Doc Fellow, Earth System Physics
International Centre for Theoretical Physics
Strada Costiera 11, 34100 Trieste, Italy
Office tel: 0039 040 2240 385
Cell: 0039 34 71 94 06 55
emails: msylla@ictp.it, syllabamba@yahoo.fr
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De : zou liwei <zouliwei@gmail.com>
À :
regcnet@lists.ictp.it
Envoyé le : Jeu 14 octobre 2010, 17h 48min 22s
Objet : [RegCNET] NPS problem
Dear ALL,
Sorry for disturbing you.
I made a simulation employing regCM3 over Monsoon domain. The EMANUEL convection scheme is used.
However, I found the precipitation at some grids is highly over-estimated, implying a "Numerical point storm (NPS)" problem.
In current version of RegCM, it only treat this problem when Kuo Scheme is employed (Giorgi, 1991).
SO, have anybody ever dealt with the NPS problem when employ EMANUEL convection scheme or Grell Scheme?
Woule you mind giving me any suggestion?
Thank you very much!
All the Best,
Liwei
2010-10-14