chapter 11 (atmosphere) Flashcards
most ozone is formed where
above the tropics
where are the thickest layers of ozone
above the poles
what season is ozone thickest
spring
what season is ozone thinnest
autumn
how is ozone formed
uv radiation striking an oxygen molecule and then atomic oxygen reacting with molecular oxygen
uva
skin tanning
more reaches surface
uvb
blistering sunburns
skin cancer
uvc
found only in stratosphere
responsible for formation of ozone
thinning of ozone is because
halogens
cfcs
cfcs are used as
refrigerants, aerosol propellants, insulation, foam products, etc
which chemical is more effective than chlorine in ozone depletion
bromine
where is bromine found
halons (fire extinguishers)
what effect does ozone depletion have on the stratosphere
cools
what effect does ozone depletion have on the immune system
reduces it
what effect does ozone depletion have on crop production
reduces it
what effect does ozone depletion have on mutations
increases them
why are HCFCs better
replaces chlorine with hydrogen
breaks down more readily in troposphere
montreal protocol
designed to protect stratospheric ozone layer
how much have greenhouse gasses increased since industrialization
25%
where do greenhouse gasses come from in the us
Energy use
what effect will increased CO2 absorption in oceans have on seawater
lower pH
how much warmer are air temps today than they were during the industrial revolution
5-9 degrees
what kind of diseases will increase because of global warming
waterborne diseases
malaria, cholera, etc
what type of fauna will be most affected by global warming
arctic fauna
thawing of permafrost releases what
methane
how high would sea levels rise if all ice on earth melted
225 feet
how would thermohaline circulation be affected
slowed
less heavier saline water sinking
colder temps in great britain and scandinavia
how much CO2 does united states produce (compared globally)
25%
