Penman Analysis data for the 16 th June 2008

Feb 06, 2026

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This analysis presents the energy fluxes and environmental conditions recorded for Group A2 on June 16, 2008. The net radiance (Rn) was measured at 125.58 W/m², with sensible heat flux (H) at 17.15 W/m², ground heat flux (G) at 34.99 W/m², and latent heat flux (λE) at 73.44 W/m². Calculations revealed a canopy resistance of 60 sm⁻¹ and a roughness length of 0.050 m. The study highlights the influences of environmental conditions on latent heat flux as air temperature rises and relative humidity decreases throughout the day.

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Penman Analysis data for the 16 th June 2008

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Penman Analysis data for the 16th June 2008 Group A2 David Sherman Ben Thomas Matthew Weston

Net Radiance (Rn) = 125.58 Wm-2 Sensible Heat Flux (H) = 17.15 Wm-2 • Ground Heat Flux (G) = 34.99 Wm-2 • Latent Heat Flux (λE) = 73.44 Wm-2 (Rn-G) 125.58-34.99 = 90.59 (H+ λE) 17.15+73.44 = 90.59 0
Temperature (Td) = 17.23 ˚C • Dew point Temperature (Tdew) = 3.60 ˚C
H/Rn= 0.136565 Bowen Ratio (B) = 0.233521 • Canopy Resistance (rsc) = 60 sm-1 • Roughness Length (z0) = 0.050 m • Friction Velocity (U*) = 0.138 m/s
Increasing the value of Canopy Resistance and / or Roughness Length • Latent Heat Flux tends to drop as the day progresses as the air becomes warmer and Relative Humidity falls.