Changes between Version 7 and Version 8 of Documentation/Frac_Nobio

Timestamp:

2016-05-12T10:22:44+02:00 (8 years ago)

Author:

aducharne

Comment:

--

Documentation/Frac_Nobio

@@ -22 +22 @@
 == slowproc ==
 
-slowproc_veget : computes the frac_nobio from the vegetation map read. It sums all the fractions which are covered by ice in carteveg5km.nc.
+slowproc_veget : 
+- computes the frac_nobio from the vegetation map read. It sums all the fractions which are covered by ice in carteveg5km.nc.
+- AD: defines soiltile(:,jst=1,3) for hydrol. totfrac_nobio(:) is included in soiltile(:,1), the fraction covered by bare soil (PFT1, jv=1). 
 
 slowproc_readvegetmax : derived from the PFT map as the complement needed to bring the sum of veget(ig,jv) to 1. So the other types of non biological active surface types are apparently not documented in the PFT maps.
@@ -51 +53 @@
 Here frac_nobio is not used. The information about the fraction of the grid box which is not covered by vegetation or bare soil is integrated in the various surface parameters provided to enerbil (vbeta1, soilflx, soilcap).
 
+AD: do the energy and water and fluxes produced by enerbil correspond to vegtot= SUM(veget_max(:,jv), jv=1,nvm), or to vegtot+totfrac_nobio=1 ??
 == hydrol ==
 
 hydrol_snow : frac_nobio is used to update the snow mass with the fraction of sublimation attributable to the fraction of the grid not covered by biological active surfaces. It also intervenes in the melting of the snow on (1-totfrac_nobio) and split the falling snow over the 2 sub areas of the grid box. 
+
+AD: hydrol_soil treats the soil water balance with the following features, which may not be consistent from the point of view of nobio:
+- the soil treated in hydrol_soil covers SUM(soiltile(ji,:))=1=vegtot+totfrac_nobio
+- excluding the water fluxes to/from the routing scheme for simplicity, the soil receives as liquid input fluxes: (i) the snowmelt that was produced from vegtot+totfrac_nobio, and (ii) the rainfall that fell on vegtot only. Here, I am not sure if it's consistent to redistribute this rainfall on vegtot+totfrac_nobio without renormalization...?
+- the water fluxes that leave the soil are (i) the surface runoff, drainage, and bare soil evaporation (evapnu), which are produced over SUM(soiltile(ji,:))=vegtot+totfrac_nobio, (ii) the transpiration and interception loss, which are only produced from the PFT 2 to nvm, corresponding to soiltile(ji,2)+soiltile(ji,3). This sends back to my question regarding enerbil, although I don't imply this is wrongly done in the code.
+
 
 == thermosoil ==