The definitions of quantities output by Cupid by layer often depend on layer number. The layer variable EAIR, for example (code 5,5,8), gives the air vapor pressure in layers above the soil surface, and soil water potential in layers below the soil surface. Below is a summary of layer variable definition as a function of layer regime.
There are 4 major layer regimes in Cupid:
JZ=1 is the upper boundary in the model, above the canopy. JZ=JZBOT, the lowest layer in the soil, is the lower boundary.
Below are tables of variable names output at each layer for each layer variable code. Following the tables are definitions for each of these variables.
CUPID LAYER VARIABLES:
504 height zdh contot etotw vpd qcond tlfav econd pslay
=====================================================================================
jz=1,nlabcy z vpd qcond econd
nlabcy+1,jzcpy z zdh contot etotw vpd qcond tlfave econd pslay
jzcpy1,jzsfc z vpd qcond econd
jzsfc1,jzbot z qcond watcon
505 rndiv pint tran evapg heatg tair u eair rh
======================================================================================
1,nlabcy et q tn uprof en relout
nlabcy+1,jzcpy rndiv pint trout evapg heatg tair uprof en relout
jzcpy1,jzsfc tn uprof en relout
jzsfc1,jzbot z proot rupout tn wstor pnbar wt100
proot=froot(jz)*100.
rupout=rootup(jz)*dt
wstor(jz)=wnl(ihr,jz-1)*(z(jz)-z(jz-1))*1000./2.+
& wnu(ihr,jz)*(z(jz+1)-z(jz))*1000./2.
pnbar=pn(ihr,jz)/100.
wt100=wt(ihr,jz)*100.
506 zmid akcpso cpcpso akh cp rsave rhleaf akw cw
======================================================================================
1,nlabcy zmid ak1 cp1 ak2 cp
nlabcy+1,jzcpy zmid ak1 cp1 ak2 cp rsaout rhleaf
jzcpy1,jzsfc-1 zmid ak1 cp1 ak2 cp
jzsfc zmid ak1 cp1 ak2 cp akwsfc
jzsfc1,jzbot zmid aksoil cpout akh cp akout cwout
ak1=akcpy(jz)/1.200
ak2=akh(jz)/1200.
rsaout = rsave(jout)
akwsfc=akw(jzsfc)*1.e6
cpout=cpsoil(jz)*1.e-6
c output akw and cw in mg s m-4 units.
cwout=cw(jz)*1.e6
akout=akw(jz)*1.e6
507 clai cslay rslay pslay cilay fehist rdlay ecompl
==============================================================================
2,jtot clai cslay rslout pslay cilay fehist rdlay ecompl
rslout = rslay(jj)
NAME LAYER REGIME) DEFINITION (M,NN,C)
____ _________________________ ________
HEIGHT ALL) Height of the top of the layer (m) 5,04,1
ZDH 2) Height of top of the layer divided by 5,04,2
the canopy height.
CONTOT 2) Total condensation for a layer 5,04,3
ETOTW 2) Evapotranspiration in a canopy layer 5,04,4
(mgm-2s-1)
VPD 1-3) Vapor pressure deficit (mb) 5,04,5
QCOND ALL) Sensible heat flux by the soil and 5,04,6
canopy layer (Wm-2)
TLFAVE 2) Average leaf temperature in canopy (C) 5,04,7
ECOND 1-3) Vertical water flux in each layer (Wm-2) 5,04,8
4) Liquid water flux in soil (mg m-2 s-1)
PSLAY 2) Photosynthetic rate in each layer 5,04,9
(1E-6 mol CO2 m-2 s-1)
RNDIV 2) Net radiation divergence in layer (Wm-2) 5,05,1
4) Depth of soil node (m)
PINT 2) Precipitation intercepted by a canopy 5,05,2
layer (mm)
4) Percentage of root system extracting
water at each soil node.
TRAN 2) Transpiration of a canopy layer (Wm-2) 5,05,3
4) Total amount of water extracted at each
soil node during this timestep by roots
(units ?)
EVAPG 1) ??? 5,05,4
2) Evaporation/ground area by layer (Wm-2)
HEATG 1) ??? 5,05,5
2) Sensible heat/ground area (Wm-2)
TAIR 1-3) Air temperature (C) 5,05,6
4) Soil temperature (C)
U 1-3) Wind speed (ms-1) 5,05,7
4) Water stored in each soil layer
(units?)
EAIR 1-3) Air vapor pressure in canopy (mb) 5,05,8
4) Soil water potential (bars)
RH 1-3) Relative humidity of air (percent) 5,05,9
4) Volumetric water content of soil
(percent)
ZMID Height of midpoint of each layer (m) 5,06,1
AKCPSO Thermal conductivity for soil layer 5,06,2
(Jm-1s-1K-1) or canopy layer (m2s-1)
CPCPSO Thermal capacity of soil layer (MJm-3K-1) 5,06,3
or the canopy layer (kJm-3K-1)
AKH Thermal conductivity of soil or atmosphere 5,06,4
in canopy div. by layer height incr. (ms-1)
CP Thermal capacity of soil or atmosphere in 5,06,5
the canopy (Jm-2s-1K-1)
RSAVE Average stomatal resistance of a layer of 5,06,6
leaves (sm-1)
RHLEAF Boundary layer resistance of leaves in 5,06,7
a layer (s/m)
AKW Capillary conductivity of a layer in soil 5,06,8
divided by a layer depth increment (kgsm-4)
CW Capillary water capacity of soil divided 5,06,9
by a layer depth increment (kgsm-4)
CLAI Cumulative leaf area index (from top down) 5,07,1
CSLAY Leaf conductivity (stomatal and bound.layer) 5,07,2
(mol-1 H2O m2s)
RSLAY Stomatal resistance (s/m) 5,07,3
PSLAY Leaf photosynthetic rate (E-6 mol m-2s-1) 5,07,4
CILAY Leaf internal CO2 concentration (ppm) 5,07,5
FEHIST Light history factor for photosynthesis 5,07,6
model