What methods have scientists used to gather data about historical temperatures?
ID: 304878 • Letter: W
Question
What methods have scientists used to gather data about historical temperatures?
What evidence have scientists collected shows that atmospheric warming is occurring?
What are the consequences of atmospheric warming?
What kinds of human activities increase the amount of atmospheric warming?
What are the consequences of rising sea levels?
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Explanation / Answer
Answer 1
Methods of gathering data about historical temperature:
Indirect methods and techniques used to deduce historical temperature is called Climate Proxies.
-The Ice Sheets of polar regions are used to determine the ancient temperature as layers of snow are formed at different temperature with different chemical composition.
-Tree rings gets narrow or wider depending upon the existing climate.
-Fossil leaves provide evidence of carbon dioxide content of paleoclimate.
-Ocean sediments and lake are major source of measuring historical temperature. Sediments are the layers formed by shell of small surface living animals that are deposited over millions of years.
Answer 2
Evidence of atmospheric warming
-Sea surface warming
-Coral disease
-Observation of melting ice
-Greenhouse gases
Answer 3
Consequences of atmospheric warming
-The average temperature of Earth will rise leading to disturbance in ecology of planet.
-Melting of ice sheets.
-Rise of sea level.
- Greenhouse gases will adversely affect the ecosystem of the Earth.
Answer 4
Human activities increasing atmospheric warming
-Heat Traping Emissions from burning coal,gas and oil in power plants.
-Rapid increase in the amount of greenhouse gases mainly C02 from combusted fossil fuels.
-Black carbon absorb sunlight and drive temperature rise.
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