Show:
El Nino/La Nina
Milankovitch Cycles
Proxy Data
Antarctica
Other Drivers of Climate Change
100
Where is there warm water during El Nino?
everywhere
100
What are the three Milankovitch Cycles?
Shape, tilt, wobble
100
If a tree ring is wide and light-colored, it means that...
Growing conditions were good at this time
100
How far back in history do ice cores go?
800,000 years
100
During Pangaea, Antarctica was...
Much warmer (closer to the equator)
200
During El Nino, Australia experiences _____ pressure and ______ water
high, warm
200
When the shape of Earth's orbit is more elliptical, Earth's temperatures are ______
colder
200
This type of proxy data is found at the bottom of lakes and can show the lake levels of different times and what organisms lived in the lake
Sediments
200
Besides ice cores, what is the other source of proxy data looked at in Antarctica that provides a record that goes further back in history?
sediments
200
Right after a volcanic eruption, global temps ________
decrease
300
During La Nina, Australia experiences ______ pressure and _____ water
Low, warm
300
When there is less tilt in the Earth's axis, seasonal differences are _______
reduced
300
Pollen is most used to show what types of _______ were around at that time
vegetation
300
Scientists study ice cores by looking at the contents of the ____ ______ in the ice
Air bubbles
300
A while after a volcanic eruption, global temperatures increase because of the added _____
CO2
400
Is fishing better or worse in South America during El Nino? Why?
fishing is WORSE because the thermocline goes flat and upwelling stops, so no fresh nutrients are brought to fish
400
The cycle in which the Earth acts like a spinning top and the axis points from Polaris to Vega
What is wobble
400
The metals/elements found in _______ can be used to determine the temperature of the water at that time
corals
400
These 4 things can be studies by looking at the air in an air bubble of an ice core
CO2 and CH4 amounts, volcanic eruptions, temperature of the air, pollen in the air
400
What is an urban heat island?
Cities tend to be 2-9 degrees warmer than the surrounding countryside because vegetation cools the air through evaporation, and cities have less trees
500
When are there dry conditions and often wildfires in Australia?
La Nina
500
When the Earth has a greater tilt, the climate differences between the poles and the tropics ________
decrease
500
Name 6 types of proxy data
Ice cores, sediments, corals, pollen, tree rings, historical data
500
Explain the positive feedback loop related to increasing albedo
Melting of sea ice ---> lowered albedo (albedo=reflectivity of a surface) ---> increase in absorbed sunlight ---> more melting .....
500
CO2 and water vapor are greenhouse gases that _______ the global temperature
increase