climate change Flashcards
what evidence is there for climate change
rising sea levels, ice cores , paintings and diaries ,
sea ice position, global temperature data
list human and natural causes of climate change
natural- volcanic eruptions , sun being hotter some years, the earth wobbling towards and away from the sun.
human- factories, cars, cows reared for meat
changes in the earths orbital geomatry
every 100,00 years the orbit changes from a cirlce to an oval.
over roughly 40,000 the tilt changes - will less tilt our summers are coolers and winters milder.
as earth spins the axis wobbles. The axis wobbles from one extreme to another.
enhanced greenhouse effect
where extra greenhouse gases trap too much of the sun’s energy
name 2 greenhouse gases
carbon dioxide , nitrous oxide and methane
comparison of weather to climate
weather- atmospheric conditions on a day to day basis
climate-atmospheric conditions as an average over time
info on the quaternary period?
started 2.6 million years ago
during this period there has been a general increase in temperatures
mostly colder before this period
sunspots
sun spots makes the sun hotter
less= cooler sun