Geoscience Reference
In-Depth Information
vapor pressure deficit, and wind speed at 2 m calculated at three Australian sites in
question 10.
Variable
Units
Site 1
Site 2
Site 3
Maximum air temperature
(
°C
)
29.10
35.00
23.00
Minimum air temperature
(
°C
)
17.90
21.40
11.50
Average temperature
(
°C
)
23.50
28.20
17.25
Sat. vapor pressure (Max. temp)
(kPa)
4.029
5.623
2.809
Sat. vapor pressure (Min. temp)
(kPa)
2.051
2.549
1.357
Average sat. vapor pressure
(kPa)
3.040
4.086
2.083
Wet bulb psychrometric constant
(kPa
°C
−1
)
0.066
-
-
Dry bulb temperature
(
°C
)
24.00
-
-
Wet bulb temperature
(
°C
)
19.00
-
-
Vapor pressure
(kPa)
1.863
-
-
Relative humidity
(%)
-
39
-
Vapor pressure
(kPa)
-
1.593
-
Dew point
(
°C
)
-
-
11.00
Vapor pressure
(kPa)
-
-
1.313
Vapor pressure deficit
(kPa)
1.177
2.492
0.770
Wind measurement height
(m)
10.00
10.00
2.00
Wind speed
(m s
−1
)
5.60
4.70
3.70
Modified wind speed
(m s
−1
)
4.19
3.51
3.70
Table 26.7(b)
Daily average net radiation for a crop calculated at three Australian sites
in question 10.
Variable
Units
Site 1
Site 2
Site 3
Day of year
(none)
40
46
52
Eccentricity factor
(none)
1.0255
1.0232
1.0206
Solar declination
(radians)
−0.2688
−0.2355
−0.1998
Sunset hour angle
(radians)
1.6691
1.6387
1.7033
Latitude
(deg)
−19.62
−15.78
−33.13
Latitude in radians
(radians)
−0.3424
−0.2754
−0.5782
Extraterrestrial solar radiation
(mm day
−1
)
16.61
16.34
15.68
Cloud fraction
(none)
0.40
0.10
-
Solar at ground (cloudy sky)
(mm day
−1
)
9.14
11.44
-
Number of bright sunshine hours
(hours)
-
-
4.00
Maximum daylight hour
(hours)
-
-
13.01
Solar at ground (cloudy sky)
(mm day
−1
)
-
-
6.33
Solar at ground (cloudy sky)
(mm day
−1
)
9.14
11.44
6.33
Selected value for Albedo
(none)
0.23
0.23
0.23
Net solar radiation
(mm day
−1
)
7.04
8.81
4.88
Vapor pressure
(k Pa)
1.863
1.593
1.313
Effective emissivity
(none)
0.149
0.163
0.180
Solar at ground (clear sky)
(mm day
−1
)
12.46
12.26
11.76
Assigned site humidity
(none)
Humid
Arid
Humid
Cloud factor
(none)
0.733
0.910
0.538
Average temperature
(
°
C)
23.50
28.20
17.25
Net longwave
(mm day
−1
)
−1.68
−2.44
−1.37
Net radiation
(mm day
−1
)
5.35
6.37
3.51
