Building energy fix (issue #803). #1034
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Description of changes
There is an implicit assumption in the urban building energy model that building width equals street width. However, this assumption has been relaxed and building width is now derived from the morphology dataset.
Specific notes
There is an implicit assumption in the urban building energy model that building width equals street width. However, this assumption has been relaxed and building width is now derived from the Jackson morphology dataset. Specifically, the equations which use H/Ws (building height over street width) now use H/Wb (building height over building width). Building width is derived from (Ws*froof)/(1-froof), where froof is the roof (building) fraction.
A simulation with the new equations indicate that as expected, for froof=0.5, answers are identical (because H/Ws = H/Wb). Differences in other cases depend on the degree of departure from froof=0.5 and the presence and magnitude of space heating and air conditioning.
Contributors other than yourself, if any: None
CTSM Issues Fixed (include github issue #): #803
Are answers expected to change (and if so in what way)? Yes, but only for urban landunits. The effects on grid cell averages are very small as shown by the diagnostics from this year 2000 case:
http://webext.cgd.ucar.edu/I2000/clm50_ctsm10d098_1deg_GSWP3V1_CON_FIXBUILDENERGY_2000/lnd/clm50_ctsm10d098_1deg_GSWP3V1_CON_FIXBUILDENERGY_2000.1991_2010-clm50_ctsm10d098_1deg_GSWP3V1_CON_2000.1991_2010/setsIndex.html
Any User Interface Changes (namelist or namelist defaults changes)? No.
Testing performed, if any:
The clm_short testlist was run. All pass except comparison to ctsm1.0.dev098 baseline was not bfb as expected.