ORCHIDEE Development Section
 orchidas : dev / ALBEDO / Results Site Map

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

 PFT 1 2 3 4 5 6 7 8 9 10 11 12 13 near infrared $$alb_\mathsf{leaf}$$ — 0.23 0.18 0.18 0.20 0.24 0.15 0.26 0.20 0.24 0.27 0.28 0.26 $$alb_\mathsf{snow,aged}$$ 0.50 — — 0.10 0.37 0.08 0.16 0.17 0.27 0.44 0.44 0.44 0.44 $$alb_\mathsf{snow,dec}$$ 0.13 — — 0.10 0.10 0.16 0.04 0.07 0.08 0.12 0.12 0.12 0.12 $$alb_\mathsf{nobio}$$ 0.2 visible $$alb_\mathsf{leaf}$$ — 0.04 0.04 0.04 0.04 0.03 0.03 0.03 0.03 0.06 0.06 0.06 0.06 $$alb_\mathsf{snow,aged}$$ 0.74 — — 0.08 0.24 0.07 0.18 0.18 0.33 0.57 0.57 0.57 0.57 $$alb_\mathsf{snow,dec}$$ 0.21 — — 0.14 0.08 0.17 0.05 0.06 0.09 0.15 0.15 0.15 0.15 $$alb_\mathsf{nobio}$$ 0.6

Parameters involved in snow calculations

 Parameter Value $$d_\mathsf{snow,cri}$$, m 0.1 $$\rho_\mathsf{snow,cri}$$, kg/m3 330 $$tcst_\mathsf{snow}$$, days 10 $$age_\mathsf{snow,max}$$, days 50 $$trans_\mathsf{snow}$$, m 0.2

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.

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