Exam 2 Flashcards
(36 cards)
What are the ingredients of photochemical smog
NOx, Hydrocarbons, oxidant, accumulation, light
why does Ozone not accumulate when hydrocarbons are not present?
Because when broken down it reacts.
What are Hydrocarbons
any organic molecule that contains only H and C
what does Beers law describe
the transmission of light through a column
absorption of light by a molecule in a solution or column of gas.
formulas for beers law
T= I/Io = e^-EL
T=e^-sigmac
T = transmittance
E=absorbtivity (unique to each molecule)
L = path length ( increased L = decreased T)
sigma = absorption cross section
c=column density of gas (molecules/cm^2)
if Io = I then T=1
if Io =/ I then T < 1
Dobson units (DU)
relate to a thickness of ozone
1DU = 0.1 mm thick ozone layer at STP
if we took all the ozone in the atmosphere and pressed it down how thick would it be
3mm = 300DU
Which of the following is not a part of earths radiation budget?
- incoming radiation
- Geothermal energy
- absorbed energy
- Emitted energy
- Geothermal energy
which physics principle is important to the understanding of Earth’s radiation budget
Conservation of Energy
what is the dominate source of incoming energy in earths radiation budget
Solar radiation
which of the following is not a component of Earth’s outgoing radiation?
1. reflected solar radiation
2. radiation absorbed by the atmosphere.
3. radiation emitted by the earth
4. radiation emitted by the atmosphere
- radiation absorbed by the atmosphere
T or F: an unbalanced radiation budget can only cause the atmosphere to increase in temperature
false
what are the units employed in measuring incoming and outgoing radiation?
W/m^2
what type of radiation is incoming radiation?
shortwave radiation UV
what are the major components of incoming solar radiation
UV light, visible light, IR light
T or F: all incoming radiation passes through the atmosphere to earth’s surface.
false
T or F: all incoming radiation that reached the Earths surface is absorbed by the Earth.
false
what type of radiation describes the type emitted by earth
long wave IR
T or F: most of the radiation emitted by the earth warms the lower atmosphere, which in turn warms our planet’s surface.
true
which for of radiation is absorbed by greenhouse gasses
long wave
T or F: only very hot objects emit electromagnetic radiaiton
false
T or F: blackbody radiation is a term used to describe the relationship between an objects color, and the speed of electromagnetic radiation in units
False
T or F: the peak wavelength of blackbody radiation increases with increasing temp
False
T or F: ozone is one of the most ubundant gases in the atmosphere.
F
