Domain definition for Monsoon Wang's NAFM

[lee1043]

Found by @pochedls at https://github.com/XCDAT/xcdat/issues/166#issuecomment-974313387.

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The NAFM region in monsoon_wang driver is for North African Monsoon, 310E to 60E (as in below figure).

(image from here)

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However, with region defined as longitude=(310, 60), the area considered is from 60E to 310E (mirrored, as in below figure).

import cdms2
import vcs
f = cdms2.open('CanCM4_NAFM_wang-monsoon.nc')
d = f('variable_993')
x = vcs.init()
x.png('NAFM.png')

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In the PMP's driver for the Monsoon Wang metric, it opens model file with regular cdms2 open, as f = cdms2.open(modelFile).

@gleckler1 Could you point the reference paper for the Monsoon Wang index? And any idea for quick fix?

[gleckler1]

@lee1043 https://doi.org/10.1016/j.dynatmoce.2007.05.002