ORCHIDEE Development Section

ALBEDO

Results

The final (posterior) albedo and snow-related coefficients are presented in the tables below.

Albedo coefficients for vegetated, snowed and non-biological surfaces

PFT12345678910111213
 near infrared
\(alb_\mathsf{leaf}\)0.230.180.180.200.240.150.260.200.240.270.280.26
\(alb_\mathsf{snow,aged}\)0.500.100.370.080.160.170.270.440.440.440.44
\(alb_\mathsf{snow,dec}\)0.130.100.100.160.040.070.080.120.120.120.12
\(alb_\mathsf{nobio}\)0.2
 visible
\(alb_\mathsf{leaf}\)0.040.040.040.040.030.030.030.030.060.060.060.06
\(alb_\mathsf{snow,aged}\)0.740.080.240.070.180.180.330.570.570.570.57
\(alb_\mathsf{snow,dec}\)0.210.140.080.170.050.060.090.150.150.150.15
\(alb_\mathsf{nobio}\)0.6

Parameters involved in snow calculations

ParameterValue
\(d_\mathsf{snow,cri}\), m0.1
\(\rho_\mathsf{snow,cri}\), kg/m3330
\(tcst_\mathsf{snow}\), days10
\(age_\mathsf{snow,max}\), days50
\(trans_\mathsf{snow}\), m0.2

The prior, first-guess (JRC TIP) and posterior background albedo maps and their differences are shown on the figures below.

The prior and posterior ORCHIDEE albedo seasonal time-series together with the MODIS data are shown below for several latitude bands and regions.