Model Decisions in SUMMA

TODO: Add information and background (including references) for all the available model decisions.

Information about the selection of specific model decisions is provided to SUMMA via the model decisions file.

3. soilCatTbl

Soil-category dataset

Option Description
STAS TODO: Describe STAS
Reference
STAS-RUC TODO: Describe STAS-RUC
Reference
ROSETTA TODO: Describe ROSETTA
Reference

4. vegeParTbl

Vegetation category dataset

Option Description
USGS TODO: Describe USGS
Reference
MODIFIED_IGBP_MODIS_NOAH TODO: Describe MODIFIED_IGBP_MODIS_NOAH
Reference
plumberCABLE TODO: Describe plumberCABLE
Reference
plumberCHTESSEL TODO: Describe plumberCHTESSEL
Reference
plumberSUMMA TODO: Describe plumberSUMMA
Reference

5. soilStress

Function for the soil moisture control on stomatal resistance

Option Description
NoahType Soil stress is a thresholded linear function of volumetric liquid water content
Reference
CLM_Type Soil stress is a thresholded linear function of matric head
CLM, 2010
SiB_Type Soil stress is an exponential of the log of matric head
Reference

6. stomResist

Function for stomatal resistance

Option Description
BallBerry TODO: Describe BallBerry
Reference
Jarvis TODO: Describe Jarvis
Reference
simpleResistance TODO: Describe simpleResistance
Reference
BallBerryFlex TODO: Describe BallBerryFlex
Reference
BallBerryTest TODO: Describe BallBerryTest
Reference

7. bbTempFunc

Ball-Berry: leaf temperature controls on photosynthesis + stomatal resistance

Option Description
q10Func TODO: Describe q10Func
Reference
Arrhenius TODO: Describe Arrhenius
Reference

8. bbHumdFunc

Ball-Berry: humidity controls on stomatal resistance

Option Description
humidLeafSurface TODO: Describe humidLeafSurface
Reference
scaledHyperbolic TODO: Describe scaledHyperbolic
Reference

9. bbElecFunc

Ball-Berry: dependence of photosynthesis on PAR

Option Description
linear TODO: Describe linear
Reference
linearJmax TODO: Describe linearJmax
Reference
quadraticJmax TODO: Describe quadraticJmax
Reference

10. bbCO2point

Ball-Berry: use of CO2 compensation point to calculate stomatal resistance

Option Description
origBWB TODO: Describe origBWB
Reference
Leuning TODO: Describe Leuning
Reference

11. bbNumerics

Ball-Berry: iterative numerical solution method

Option Description
NoahMPsolution TODO: Describe NoahMPsolution
Reference
newtonRaphson TODO: Describe newtonRaphson
Reference

12. bbAssimFnc

Ball-Berry: controls on carbon assimilation

Option Description
colimitation TODO: Describe colimitation
Reference
minFunc TODO: Describe minFunc
Reference

13. bbCanIntg8

Ball-Berry: scaling of photosynthesis from the leaf to the canopy

Option Description
constantScaling TODO: Describe constantScaling
Reference
laiScaling TODO: Describe laiScaling
Reference

14. num_method

Numerical method

Option Description
itertive TODO: Describe itertive
Reference
non_iter TODO: Describe non_iter
Reference
itersurf TODO: Describe itersurf
Reference

15. fDerivMeth

Method to calculate flux derivatives

Option Description
numericl TODO: Describe numericl
Reference
analytic TODO: Describe analytic
Reference

16. LAI_method

Method to determine LAI and SAI

Option Description
monTable TODO: Describe monTable
Reference
specified TODO: Describe specified
Reference

17. cIntercept

Parameterization for canopy interception

Option Description
sparseCanopy TODO: Describe sparseCanopy
Reference
storageFunc TODO: Describe storageFunc
Reference
notPopulatedYet TODO: Describe notPopulatedYet
Reference

18. f_Richards

Form of Richards' equation

Option Description
moisture TODO: Describe moisture
Reference
mixdform TODO: Describe mixdform
Reference

19. groundwatr

Groundwater parameterization

Option Description
qTopmodl TODO: Describe qTopmodl
Reference
bigBuckt TODO: Describe bigBuckt
Reference
noXplict TODO: Describe noXplict
Reference

20. hc_profile

Hydraulic conductivity profile

Option Description
constant TODO: Describe constant
Reference
pow_prof TODO: Describe pow_prof
Reference

21. bcUpprTdyn

Upper boundary condition for thermodynamics

Option Description
presTemp TODO: Describe presTemp
Reference
nrg_flux TODO: Describe nrg_flux
Reference
zeroFlux TODO: Describe zeroFlux
Reference

22. bcLowrTdyn

Lower boundary condition for thermodynamics

Option Description
presTemp TODO: Describe presTemp
Reference
zeroFlux TODO: Describe zeroFlux
Reference

23. bcUpprSoiH

Upper boundary condition for soil hydrology

Option Description
presHead TODO: Describe presHead
Reference
liq_flux TODO: Describe liq_flux
Reference

24. bcLowrSoiH

Lower boundary condition for soil hydrology

Option Description
presHead TODO: Describe presHead
Reference
bottmPsi TODO: Describe bottmPsi
Reference
drainage TODO: Describe drainage
Reference
zeroFlux TODO: Describe zeroFlux
Reference

25. veg_traits

Parameterization for vegetation roughness length and displacement height

Option Description
Raupach_BLM1994 TODO: Describe Raupach_BLM1994
Raupach, 1994
CM_QJRMS1988 TODO: Describe CM_QJRMS1988
Choudhury and Monteith, 1988
vegTypeTable TODO: Describe vegTypeTable
Reference

26. rootProfil

Parameterization for the rooting profile

Option Description
powerLaw TODO: Describe powerLaw
Reference
doubleExp TODO: Describe doubleExp
Reference

27. canopyEmis

Parameterization for canopy emissivity

Option Description
simplExp TODO: Describe simplExp
Reference
difTrans TODO: Describe difTrans
Reference

28. snowIncept

Parameterization for snow interception

Option Description
stickySnow Includes a rapid interception increasae between -3 and 0 C from observations of increased cohesion in warm regions.
Andreadis et al. 2009
lightSnow Includes a slight decrease in interception after -3 C from obervations in cold regions.
Hedstom and Pomeroy, 1998

29. windPrfile

Canopy wind profile

Option Description
exponential The wind speed profile through the canopy is an exponential decay function.
Reference
logBelowCanopy The wind speed profile through the canopy is a logarithmic decay function.
Reference

30. astability

Stability function

Option Description
standard TODO: Describe standard
Reference
louisinv TODO: Describe louisinv
Reference
mahrtexp TODO: Describe mahrtexp
Reference

31. compaction

Compaction routine

Option Description
consettl TODO: Describe consettl
Reference
anderson TODO: Describe anderson
Reference

32. snowLayers

Method to combine and sub-divide snow layers

Option Description
jrdn1991 Divides the snowpack into a growing layer system where the number of layers is 100.
Jordan, 1991
CLM_2010 Divides the snowpack into a 5-layer system. The rules of the layer division/merge can be altered to create <5 layer snowpacks.
Community Land Model, 2010

33. thCondSnow

Thermal conductivity representation for snow

Option Description
tyen1965 TODO: Describe tyen1965
Reference
melr1977 TODO: Describe melr1977
Reference
jrdn1991 TODO: Describe jrdn1991
Reference
smnv2000 TODO: Describe smnv2000
Reference

34. thCondSoil

Thermal conductivity representation for soil

Option Description
funcSoilWet TODO: Describe funcSoilWet
Reference
mixConstit TODO: Describe mixConstit
Reference
hanssonVZJ TODO: Describe hanssonVZJ
Reference

35. canopySrad

Method for canopy shortwave radiation

Option Description
noah_mp TODO: Describe noah_mp
Reference
CLM_2stream TODO: Describe CLM_2stream
Reference
UEB_2stream TODO: Describe UEB_2stream
Reference
NL_scatter TODO: Describe NL_scatter
Reference
BeersLaw TODO: Describe BeersLaw
Reference

36. alb_method

Albedo representation

Option Description
conDecay TODO: Describe conDecay
Reference
varDecay TODO: Describe varDecay
Reference

37. spatial_gw

Method for spatial representation of groundwater

Option Description
localColumn TODO: Describe localColumn
Reference
singleBasin TODO: Describe singleBasin
Reference

38. subRouting

Method for sub-grid routing

Option Description
timeDlay TODO: Describe timeDlay
Reference
qInstant TODO: Describe qInstant
Reference

39. snowDenNew

Method for new snow density

Option Description
hedAndPom An empirical calculation dependant on air temperature.
Hedstom and Pomeroy, 1998
anderson TODO: Describe anderson
Reference
pahaut_76 An empirical calculation dependant on air temperature and wind speed.
Pahaut, 1976
constDens A constant new snow density of 330 kg/m^3
Reference

40. snowUnload

Method for unloading snow from the canopy

Option Description
meltDripUnload Contains a temperature unloading function where the parameter snowUnloadingCoeff controls the exponential unloading rate and ratioDrip2Unloading is the ratio of liquid water drip from the canopy to snow unloading.
Hedstom and Pomeroy, 1998
Storck et al. 2002
windUnload Contains temperature and wind dependent unloading functions. The rates of temperature and wind unloading are adjustable through parameters rateTempUnloading and rateWindUnloading. Both functions contain parameter thresholds for the minimum temperature and windspeed required for unloading.
Roesch et al. 2001