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Author Question: A fjord is a glacial landform that occurs in areas in which a glacier encounters the ocean and ... (Read 93 times)

Haya94

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on: Jul 14, 2018
A fjord is a glacial landform that occurs in areas in which a glacier encounters the ocean and subsequently retreats.
 
  Indicate whether the statement is true or false

Question 2

Describe the properties, current atmospheric concentrations, and sources the primary greenhouse gases contributing to climate change?
 
  What will be an ideal response?


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manuelcastillo

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Reply #1 on: Jul 14, 2018
Answer to Question 1

TRUE

Answer to Question 2

Answers should include the following gases:
Water vapor (H2O): most abundant, but low residence time. Natural sources.
Carbon dioxide (CO2): greatest contributor; long residence time; anthropogenic sources and natural sources. Currently 400 ppm.
Methane (CH4): high global warming capacity; intermediate residence time; high global warming potential; largest sources are anthropogenic; 750 ppb.
Nitrous oxides (N2O): higher than any time in the last 100,000 years. long residence time; high global warming potential; emissions associated with agriculture contribute to rise, but also some natural sources.
Halogens (CFCs, etc.): 100 anthropogenic; high global warming potential, but greatly reduced due to Montreal Protocol.


Haya94

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Reply #2 on: Jul 14, 2018
Correct answers!


manuelcastillo

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Reply #3 on: Jul 14, 2018
Great! Please up vote :D


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