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South North East West Sunrise Sunset Azimuth Angle (From South) Alti tude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure 4.1 Ecological Climatology © 2008 G. Bon

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Page 1: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

South

North

East

West

Sunrise

Sunset

Azimuth Angle(From South)

Altitude

altitude angle

horizontal surface

perpendicular to surface

zenith angle

Sun

Figure 4.1

Ecological Climatology © 2008 G. Bonan

Page 2: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

Winter Solstice

North

East

West

South 26.5 o

Sunrise

Sunset

Summer Solstice

South

North

East

West

Sunrise

Sunset73.5o

Figure 4.2

Ecological Climatology © 2008 G. Bonan

Page 3: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

Winter SolsticeDecember 21-22

66.5o

23.5o

Equator

South Pole

North Pole Autumnal EquinoxSeptember 22-23

NH: SummerSH: Spring

NH: Autumn

Vernal EquinoxMarch 21-22

Summer SolsticeJune 21-22NH: Winter

SH: Summer

NH: SpringSH: Autumn

SH: Winter

146 million km 151 million km

149 million km

148 million kmTropic of Capricorn (23.5oS)

Tropic of Cancer (23.5oN)

Declination

Earth

Sun

Figure 4.3Ecological Climatology © 2008 G. Bonan

Page 4: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

-30

-20

-10

0

10

20

30

De

clin

atio

n A

ng

le

Vernal Equinox

AutumnalEquinox

Summer Solstice

Winter Solstice

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Figure 4.4

Ecological Climatology © 2008 G. Bonan

Page 5: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

1.00

1.00

2.00

30o

Zenith Angle = 0o Zenith Angle = 60o

North Pole

South Pole

Equator

0102030405060708090

100

0 10 20 30 40 50 60 70 80 90

Zenith Angle (degrees)

Per

cent

0102030405060708090

Altitude Angle (degrees)

Figure 4.5

Ecological Climatology © 2008 G. Bonan

Page 6: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

0

200

400

600

800

1000

1200

1400

0 3 6 9 12 15 18 21 24

Time of Day (hours)

Sol

ar R

adia

tion

(W m

-2)

15

30

0 45

45

0 3 6 9 12 15 18 21 24

Time of Day (hours)

75

60

75

60

Figure 4.6

Ecological Climatology © 2008 G. Bonan

Page 7: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

Figure 4.7

Ecological Climatology © 2008 G. Bonan

Page 8: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

Figure 4.8

Ecological Climatology © 2008 G. Bonan

Page 9: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

Absorbed By

Atmosphere

350 W m-2

Incoming Solar Radiation

342 W m-2

Reflected Solar Radiation

107 W m-2

Reflected By Atmosphere

77 W m-2

Reflected

By Surface

30 W m-2

Absorbed By Atmosphere

67 W m-2

Outgoing Longwave

Radiation

235 W m-2Emitted By

Atmosphere

195 W m-2

Emitted By

Surface

390 W m-2

Back

Radiation

324 W m-2

Atmospheric Window

40 W m-2

Latent Heat

78 W m-2

Sensible Heat

24 W m-2

Absorbed By Surface

168 W m-2

Figure 4.9

Ecological Climatology © 2008 G. Bonan

Page 10: South North East West Sunrise Sunset Azimuth Angle (From South) Altitude altitude angle horizontal surface perpendicular to surface zenith angle Sun Figure

Figure 4.10

Ecological Climatology © 2008 G. Bonan