12.3 - Atmospheric System Feedbacks Profile Picture

what are factors driving climate called?

climate forcings

what is the net result of deforestation?

warming

how can deforestation cool the climate?

bare ground reflects more sunlight than trees

what are albedos?

ability to reflect sunlight

replacing forests with cropland _____ temperature

decreases

dry sand has ___ albedo than wet sand

higher

albedo is usually ____ at earth's poles

higher

what two factors affect albedo?

material type and incident angle

as air becomes warmer, capacity to hold water _____

increases

clouds are an example of positive/negative feedback

positive

what causes convection currents in ocean?

differences in temperature and differences in density of water

liquid ability to hold gas ____ as temperature increases

decrease

methane is more than ____ times stronger than co2 as greenhouse gas

20

what is methane clathrate?

frozen methane and water

frozen methane and water is called?

methane clathrate

energy emitted is proportional to the ____ power of temperature

fourth

hotter objects release electromagnetic radiation at ____ wavelengths

shorter

what percent of earth's atmosphere is CO2?

0.04%

what percent of venus and mars atmosphere is CO2?

96%

venus is ____ and have atmosphere ____ than earth

hotter, denser

mars has ____ temperature and ______ atmosphere than earth

lower, less dense

what is earth's average surface temperature?

15 celsius

the melting of arctic sea ice and glaciers is an example of positive/negative feedback

positive