For the monthly files from L4 Ameriflux, we are comparing the

following quantities with the models:

H_f                       This is sensible heat flux, in units of

W/m2/day according to Ameriflux documentation

LE_f                     This is latent heat flux, in units of

W/m2/day according to Ameriflux documentation

Rg_f                      This is global radiation, in units of MJ/m2/day

Reco_or                This is the ecosystem respiration flux, in

units of gC/m2/day

NEE_or_fMDS     This is the net ecosystem exchange flux, in units of

gC/m2/day

GPP_or_MDS      This is the gross primary production flux, in units

of gC/m2/day

I do not personally understand the H and LE units for the

observations and have asked Ameriflux for clarification. Please skip for now.

For Rg_f, please compare with the model variable SOLAR. Please label:

Shortwave incoming (Wm-2)

To convert Rg_f to units of Wm-2:

X MJ/m2/day * (1 x 10^6 J/MJ)/(24*3600s/day) = Y Wm-2

For Reco_or please compare with the sum of model variables ar and hr.

Please label: Re (gC/m2/day)

For NEE_or_fMDS please compare with model variable nep. Please label

NEE (gC/m2/day) 

For GPP_or_MDS please compare with model variable gpp. Please label

GPP (gC/m2/day) 

The last three model variables have units of KgC/m2/s.  To convert to

gC/m2/day, please use this approach:

X Kg C/m2/s *(1000 g C/Kg C)*(3600*24 s/day) = Y gC/m2/day

Jim