sum_of_clm_tech_note/CLM50_Tech_Note_Hydrology/2.7.1.-Canopy-Watercanopy-water-Permalink-to-this-headline.sum.md

Here is a concise summary of the provided article:

Canopy Water

The article discusses the interception, throughfall, and drip of liquid and solid precipitation by the canopy. Key points:

Interception

• Liquid precipitation is intercepted by the canopy according to the fractions f_pi,liq and f_pi,ice.
• These fractions depend on the exposed leaf and stem area index (L+S).

Throughfall and Drip

• Throughfall (q_thru,liq and q_thru,ice) is the precipitation that reaches the ground.
• Canopy drip (q_drip,liq and q_drip,ice) occurs when the canopy water exceeds the maximum storage.

Canopy Water Update

• The canopy liquid water (W_can,liq) and snow water (W_can,sno) are updated over time.
• Evaporation from the canopy (E_v^liq and E_v^ice) is partitioned based on vegetation temperature.

Ground Precipitation

• The total liquid and solid precipitation reaching the ground (q_grnd,liq and q_grnd,ice) is the sum of throughfall and drip.

Wetted/Dry Fraction

• The wetted fraction (f_wet) and dry fraction (f_dry) of the canopy are calculated.
• The snow-covered fraction (f_can,sno) is used for surface albedo calculations.