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ISP exam 3: global climate change 1
Terms in this set (34)
What is the difference between climate and weather?
1. over large regions
2. over seasons, years or longer
2. over hours or days
What is the difference, and relationship between, global climate change and global warming?
Global Climate Change:
-Describes changes in Earth's climate
-Refers to the earths warming
-Often used synonymously with Global Climate Change.
-Is only one aspect of Global Climate Change
The term "Global Climate Change" can refer to two (related) things. What are they?
-General: changes in earth's climate which has been happening forever
-Current: Speeding up of climate change due to anthropogenic causes
What three main factors affect the Earth's climate?
How does the greenhouse effect heat cars?
-Visible light is absorbed and heats object in the car
-Heat is emitted as infrared radiation, but can't go through windows.
-Heat is trapped!!
How does the greenhouse effect heat the earth?
-Earth is like the car
-Greenhouse gasses in the atmosphere are like the glass of the car.
What types of radiation don't pass through glass and greenhouse gasses?
What is similar between glass and green house gasses (concerning the greenhouse effect)?
UV radiation can't go through glass or greenhouse gases
Is the greenhouse effect warming the earth a new phenomenon?
why does CO2 go up and down every year?
it goes up and down because in the summer plants take take in the CO2 and in the winter they dont as much
With the greenhouse effect, there is a conversion of something into something else. What?
Is the greenhouse effect natural?
If global warming leads to warmer average temperatures, why doesn't a year with warmer
average temperature prove global warming is occurring? How about an especially cold
year prove global warming is not occurring?
variation from other factors will still lead to warmer and colder years
What is "Global Warming Potential" of a molecule? This is expressed in relationship to what?
-Measure of how much one molecule contributes to warming
Which gas is considered to contribute the most to greenhouse gasses? What are two other gasses that also contribute a large percentage to greenhouse gasses?
- carbon dioxide
- methane and nitrous oxide
CO2 is a greenhouse gas. It is presently at levels higher than any seen in the past ____ years?
What "sector" (i.e. human activity) contributes the most to increasing green house gasses? The second most?
1. land use change and forestry
How does deforestation contribute to the concentration of greenhouse gasses?
Forests remove carbon from the atmosphere: less forests, less CO2 removal.
What are the two opposing effects an increase in water vapor would have on global warming? Which of these two are examples of positive and negative feedback?
-Global warming predicted to increase water vapor concentration (positive feedback)
-But more clouds also leads to more reflection of suns rays (negative feedback)
How do oceans moderate CO2 in the atmosphere? If they moderate CO2, why does it matter if people are adding more to the atmosphere?
-the ocean absorbs CO2 from the atmosphere
-Contain 50 times more CO2.
-Rate of absorption slower than we are adding CO2
-Absorption rate decreasing: warm water holds and absorbs less CO2
Warmer water leads to lower CO2 absorption. How does this lead to positive feedback in relationship to global warming?
water keeps getting warmer and absorbs less CO2 and this keeps going on and global warming continues to increase
How do emissions compare between United States and China in regards to total emissions, per capita emissions and intensity?
-total emissions: China>US
-per capita: China<US
used to describe global climate change
What are 3 examples of proxy measures used to study GCC?
International panel of scientists and government officials regarding climate change established in 1988
Intergovernmental Panel on Climate Change (IPCC)
what does the IPCC do?
-Represent consensus of scientific research
-Document observed trends and predictions
What are the predicted effects of global climate change on precipitation?
-Will vary by region around the world.
-Expect some areas to receive more rain, some less.
-Droughts expected to be more severe.
-Flooding expected to be more severe.
What did the example of a farmer in Zambia exemplify?
-Drought destroyed the corn crop of this farmer in Zambia.
-Analysis suggest that drought may intensify across southern Africa due to warming of indian ocean.
Old and recent pictures of glaciers indicate what?
glaciers are disappearing
How does a glacier melting at the top of a mountain affect the community at the bottom of the
mountain in the long term? How could global climate change affect people that use
water from glaciers? About how many people?
-they will lose natural water storage
-global climate change causes glaciers to melt
-up to billions of people
Why might a small body of water on a glacier get larger and larger?
the water in these lakes are dark so they absorb heat and will keep making the Ice melt and the lake will keep getting bigger
What are the two main causes of rising sea levels?
-Expansion of water with warming
-Glacier ice melting
People living in the Maldives are worried about what?
How can GCC negatively affect forests?
-Bark beetles eat more and reproduce faster
-Warmer winters kill less beetles
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