Earth-Sun relationship week7 Flashcards
(33 cards)
what is the speed of EM waves
speed of light
what kind of energy does the earth receive from the sun
Electromagnetic energy of different wave lengths
How much of each type of EM waves does the earth receive?
8% UV, xray, gamma ray (shortwave)
47%visible length ray
45%infrared ray
Incoming solar radiation is also called? and what is it measured in
insolation
measured as the ate of radiation delivery to a horizontal surface W/m2
what waves are absorbed by the atmosphere
shortwave radiation
UV, gamma, xray
what waves reach earths surface
visible light and shortwave infrared
wha tother material absorbs UV energy
Ozone O3 and is converted to heat energy
what is the shape of earths revolution and what way does it spin ?
elliptical
counter clockwise
Perihelion
point where earth is closest the sun.
2 weeks after the december solstice
aphelion
point where earth is furthest away from the sun
2 weeks after summer solstice
how does the elliptical shape of the earths rotation affect the seasons
- affects the length of seasons over 10thousand years
- Strength of solar radiation. NH receives more intense insolation the the winter than the summer.
-Summe rin the Sh is warmer than summer in the NH
-explains glacial and interglacial era
how long does a rotation of the earth take and what does the earths rotation result in
24hrs
diurnal pattern day and night
what direction does the earth spin
west to east
anticlockwise
What does the speed of ratation depend on
the latitude
what is the solar constant
average insolation earth receives at the thermopause when earth is at its average distance away form the sun 1368W/m2
what types of waves reach the earths surface and what dot they do
visible light and shortwave infrared
warm the earths surfaces
what happens when UV is absorbs by the ozone
it is converted to heat energy
filters some harmful radiation
how does insolation arrive at the earths surface
Parallel
implies uneven warming of surface
describe the intensity of insolation with various latitudes
0 degrees-100%
30 degrees- 87%
60degrees- 50%
90 degrees- 0%
compare the amount of insolation reaching earths surface latitudinally vs longitudinally
latitudinal- uneven
longitudinal- even
not all insolation reaches earths surface. where does it go?
20% - Absorbes by atmosphere
30%- reflected by clouds, ice, snow and sands
Albedo
the fraction of em radiation reflected by the surface
what perecntage of raditaiton reaches the earths surface
50%
Earth is tilted on its axis. what is the angle between earths axos and the ecliptic plane
23.5 degrees angle of inclination
