Lack of maintenance respiration from snow covered vegetation
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Description
**Erik Kluzek < erik > - 2016-08-22 11:36:10 -0600**
**Bugzilla Id:** [2348](http://bugz.cgd.ucar.edu/show_bug.cgi?id=2348)
**Bugzilla CC:** cdkoven, dlawren, rfisher,
Maintenance respiration is calculated only when there is some vegetation that is NOT snow covered.
CNMResp has this...
if (frac_veg_nosno(p) == 1) then
leaf_mr(p) = lmrsun(p) * laisun(p) * 12.011e-6_r8 + &
lmrsha(p) * laisha(p) * 12.011e-6_r8
else !nosno
leaf_mr(p) = 0._r8
end if
frac_veg_nosno is set to 1 if elai+esai>0. and 0 otherwise (in CNVegStructUpdateMod). It looks to me that laisun and laisha is based on the total LAI (even if snow covered). This is in SurfaceRadiation. But, vegetation that is completely snow covered will have zero leaf maintenance respiration.
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