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Information on the regional vegetation
http://forum.precisrcm.com/viewtopic.php?f=1&t=123
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Author:  claudia.wanzeler [ Wed Apr 26, 2017 8:27 pm ]
Post subject:  Information on the regional vegetation

Hello all,

I finished my experiment with PRECIS, using MOSES2, and I'd like to plot the topography and Land surface type from the regional model.
Is there a way to do this?

I appreciate any help

Claudia Costa

Author:  claudia.wanzeler [ Tue May 09, 2017 2:32 pm ]
Post subject:  Re: Information on the regional vegetation

Would anyone know how to answer my question?

Claudia

Author:  dmhg [ Mon Jul 03, 2017 10:11 am ]
Post subject:  Re: Information on the regional vegetation

Hi Claudia,

Many apologies for the delay

The topography is straightforward

log in as user precis.

You experiment will have a five character identified called a runid. Let's say yours is claad (it will be different for you -- replace your runid with the one I write below).

To plot topography

Code:
.  $HOME/setvars
cd $ANCILDIR/claad

convpp qrparm.orog  qrparm.orog.pp

ppfile –r 1 –o orog.pp   qrparm.orog.pp

pprr –r 8 –o orog.rr8.pp orog.pp


The rim-removed topography / orography on the regional grid is in orog.rr8.pp

You can plot in xconv, or convert it to netcdf for plotting in a variety of formats. Xconv itself will do this conversion (open as pp, save as netcdf) or you can use cf-python.


Plotting the vegetation is not really straightforward. First of all it's worth reading the Moses2.2 scientific document.

http://www.precisrcm.com/umdoc/UM_docs/papers/p_25_t2.ps

and also Appendix I of the technical manual

http://www.metoffice.gov.uk/binaries/content/assets/mohippo/pdf/4/m/tech_man_v2.pdf

and more about the IGBP land cover here
https://edcftp.cr.usgs.gov/project/glcc/globdoc2_0.html

Speaking in a somewhat vague manner, the primary and secondary vegetation and soil types in the land surface scheme are represented as combinations of several base types. So it's not usually possible to get exact vegetation type per grid box. I like to think of it like mixing paint at a hardware store. Once you mix the paint, you get a new shade which is a mixture of the original paint. It's not possible to go back from the mixture to the original.

David

Author:  claudia.wanzeler [ Mon Jul 03, 2017 12:27 pm ]
Post subject:  Re: Information on the regional vegetation

Thank you very much, David.


Claudia

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