Penman Analysis data for the 16 th June 2008
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Penman Analysis data for the 16 th June 2008 Group A2 David Sherman Ben Thomas Matthew Weston
description
Penman Analysis data for the 16 th 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 - PowerPoint PPT Presentation
Transcript of Penman Analysis data for the 16 th June 2008
Penman Analysis data for the 16th June 2008
Group A2David Sherman
Ben ThomasMatthew 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
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Air Temperature, Dewpoint and Relative Humidity
02468
1012141618202224262830
14.0 14.1 14.2 14.3 14.4 14.5 14.6 14.7 14.8 14.9 15.0
Time of day (hrs)
Tem
p (
0 C )
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10
20
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Rela
tive
hu
mid
ity (
%)
Air temperature
Dewpoint temperature
Relative humidity
Mean temp: 13.71
Day 168
•Temperature (Td) = 17.23 ˚C •Dew point Temperature (Tdew) = 3.60 ˚C
•Bowen Ratio (B) = 0.233521 •H/Rn= 0.136565
•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.
-100
-50
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1 21 41 61 81 101 121 141 161 181 201 221 241 261 281
Canopy Resistance (s/m)
Flu
xe
s (
W/m
^2
)
LE
H
