Global Effects

Question 1

By how much are temperatures expected to rise betqeen 2005 and 2100?

Answer 1

0.3-4.8 degrees celsius

Question 2

What is sea ice

Answer 2

frozen ocean water that forms, grows and melts directly in the sea. ( from saltwater freezing at the oceans surface

Question 3

how many species foes the GBR support?

Answer 3

over 9000
(like turtles, sharkes etc.)

Question 3

Give an example of a coral reefs that is affected by climate change?

Answer 3

Great Barrier Reef., Australia.
stretches over 2,300 km and is the largest coral reefs support system in the world. ( affected by ocean acidification, coral bleaching and more intense cryclones due to cc)(

Question 4

What are coral reefs suffering from? Impacts?

Answer 4

bleaching due to increasing sea water temperatures
- loss of biodiversity ( coral reefs support about 25% of all marine species ). When corals die, the entire eecosystem collapses
- weakened food chains
- reduced fish populations
- local economies that rely on fishing and toursim suffer economic losses
-reduced carbon absoprtion; coral reeefs help absorb co2; bleahing reduces this capacity, orsening climate change feedback loops

Question 5

What can melting permafrost mean?

Answer 5

• leads to the collapse of buildings, pipelines etc. that are built on it.
• BUT it is easier to extract natural resources from the frozen ground (like natural gas and oil (which are fossil fuels))

Question 6

Say positive and negatives regarding farming:

Answer 6

• globally, some crops have suffered from climate change (e.g. maize crops have got smaller due to warming in recent years)
• but some farmers in high-latitude countries are finding that crops benefit from warmer conditions

Question 7

What do water shortages mean globally?

Answer 7

affect ability to geenrate power:
-hydroelectric power and thermal power stations require lots of water

Question 8

What does reduced rainfall mean in some places? ( like Australia) (SOCIAL global impacts)

Answer 8

-increased threat from wildfires that can damage homes and put peoples lives at risk.
- areas can become so hot and dry that they are difficult or impossible to inhabit.
-political tensions rising over water shortages, especially when rivers cross borders
-lower crop yields increase malnutrition, ill health and death from starvation, particularly in lower latitudes.