Required surface data,  base spatial resolution, and method of aggregation to the model’s grid.

 

Surface Field

Resolution

Source

Aggregation Method

Percent glacier

0.5°

Bonan et al. (2002)

Area average

Percent lake

1°

Bonan (1996)

Area average

Percent wetland

1°

Bonan (1996)

Area average

Percent sand,

percent clay

5-minute

IGBP dataset of 4931 soil mapping units and their sand and clay content for each soil layer

Soil mapping unit with greatest areal extent in grid cell

Soil color

2.8° (T42)

Zeng et al. (2002) dataset of 8 color classes without brightened soil over the Sahara Desert and Arabian Peninsula

Soil color class with greatest areal extent in grid cell

PFTs (percent of vegetated land)

0.5°

Bonan et al. (2002)

Area average, choosing 4 most abundant PFTs

Monthly leaf and stem area index

0.5°

Bonan et al. (2002)

Area average

Canopy height (top, bottom)

0.5°

Bonan et al. (2002)

Area average