APES Unite 9 Flashcards
(56 cards)
what does ozone in the atmosphere absorb
- it would absorb UV-C and UV-B radiation
- without this, life would not be possible as both UV-B and UV-C can cause issues and damage DNA
The stratosphere ozone prevents
cancer and cataracts
UV-B and UV-C in the amospehre causes
cancer and mutated DNA
antophogenic ozone depletion can be caused by
- CFCs was a primary cause of ozone breakdown
- UV radiation can also breakdown the choline atom
ozone absorbtion
- ozone absorbs UV-B and UV-C
-UV-C breaks down oxygen into two freeze oxygen atoms, which will combine with o2 to make ozone
anthropogenic ozone depletions
- solar rays strike a CFC and breaks away a choline atom
- the chorine molecule bonds with one of the three oxygen atoms, causing it to break away
- another oxygen atom will bond with the oxygen-chorline atom, and that will repeat
Where are CFCs found
- frdiges
- propellers in aresol containers
natural ozone depletion
- antarctic spring melt forms polar stratospheric clouds, which are made of water and nitrates
- the PSC choline and hydrochloric acid will reach and chlorline will release.
- the chorine molecule bonds with one of the three oxygen atoms, causing it to break away
- another oxygen atom will bond with the oxygen-chorline atom, and that will repeat
solar radiation stats
- 25 percent of solar radiation is reflected back into space
- 19 percent of solar radiation is absorbed by the amtopshera dnc clouds, then radiated out into space and the earth
- 66 percent of solar radiation goes to Earth’s surface and absorbed by lower abelido placed and reflected by higher abelido places into the clouds.
greenhouse gasses
- Solar radiations strikes the earths surface, warming it
- earths surfaces releases infrared radiation
- greenhouse gasses absorb infrared radiation and radiate it into space and back into the earth
- portions of the heat coming back are known as greenhouse gas
important greenhouse gasses
- Carbon dioxide (caused by fossil fuel combustion, decomposition, and deforestation)
- methane (relesed through extraction and combustion, agriculture, and anerobic decomposition
- N2O (agricultural soils)
- Water vapors (from plants)
Global Warmign Potential
- measure of how a molecule with contrbute to atmospheric warming over time.
- based on the residence time and infared absorbtion
thermal expansion and sea level
- water molecules move slighly apart when heated
- if all water molecules move apart,this leads to sea level rising
Melting polar and glacier ice and sea levels
- increased greenhouse gasses lead ot warmer climates
- ice sheets and glaciers will melt.
environmental impacts of sea level rise
- flooding of costal ecosystem like esturaries
- loss of species that depend on tundra and artic envirlments
- loss of thaw cycle for glaciers, leading tow water loss
human impacts on sea level rise
- relocation of costal human populations
- increased floods
- saltwater intrusion
- higher pay/insurance/repair
- property loss
vectors
- living organisms that transmit disease
- thrive in warmer enviorments
obliquity
- exposes the northern latitude at higher insolation at different times
ecentricity
- bringing the earth closer and further from the sun at different time
- more eccentric = more distance
how do scientists measure climate change
- using CO2 levels; can be measured in ice cones
- foraraminfera shells in ocean sediments measures tempeeratures
-18 oxygen contains more heat than 16 oxygen
effects of climate change
- increased temperature (habitat and species loss, drought, soil depletion, heat waves, and increased precipitation)
- rising sea levels
- melting permafrost (permantly frozen tundra soils that can thaw and release methane and CO2)
climate change affect on atmospheric currents
- widening and wearing of the Hadley cell
- as the temperature difference between poles and equator decrease
- causes a weakend jet stream and less extreme cold spells in the eastern us and dry spells in the west
climate change impact on marine ecosystems
- altered range of marine ecosystems due to sea level rise
-alternate ranges for organisms due to warmer water
climate change impact on ocean circulation
- suppression of thermoline circulation