5 Written Questions
5 Matching Questions
- what is the greenhouse effect?
- what are aerosols? how might they influence climate?
- How do CO2 levels today compare with those of the last 400,000 years?
- can you figure out why O18 increases (relative to O16) in the tests of foraminifera during cold intervals, but decreases (relative to O16) during cold intervals in water samples from ice cores?
- at what end of the electromagnetic spectrum does one find higher energy wavelengths, and at what end are the lower energy waves?
- a ...
- b the atmosphere warms the planet and makes Earth livable; the important role it plays in heating earth's surface is called the greenhouse effect: this energy heats the air and increases the rate at which it radiates energy, both out to space and back; think of short-wave UV coming in, long-wave radiation going back up from the surface as heat, these waves are absorbed by greenhouse gases, including CO2, methane, and others). We are most concerned about CO2 because we are adding it to the atmosphere in the greatest amounts, and it accumulates (does not dissipate for hundreds of years)owards Earth;
- c tiny, often microscopic, liquid and solid particles that are suspended in the air. Aerosols act directly by reflecting sunlight back to space and indirectly by making clouds "brighter" reflectors
- d in ice, O18 increases relative to O16 during warm intervals. IN forarms, O18 decreases relative to O16 during warm intervals. Ice cores go back more than 400,000 years and record oxygen isotopes (T), atmospheric CO2 and methane in trapped air bubbles. The O isotope record form forarms "mirrors" that from glacial ice.
- e highest its ever been
5 Multiple Choice Questions
- includes atmosphere, hydrosphere, geosphere, biosphere and cryosphere; these interact and involve exchanges of energy and moisture among the spheres- resulting in temperature and precipitation patterns (climate) around the globe
- > 400,000 years
- heavy isotope increases relative to light isotope at cooler temperatures (O18/O16 goes up).
5 True/False Questions
what is albedo? → forms at ~ 20 - 30 km above Earth's surface, and is a protective layer that helps to filter out UV radiation by absorbing some of its energy. Life on planet Earth needs this because too much UV at Earth's surface (where we all live) can be harmful to cell function.
what are some of the consequences of climate change- which we are already seeing? → ...
what isotopes form what part of the foraminifera test composition can be used to tell us about past ice sheet volume changes, and ALSO about past changes in ocean water temperature? → ...
how do we know that CO2 is coming primarily from fossils? → ...
stratospheric ozone → forms at ~ 20 - 30 km above Earth's surface, and is a protective layer that helps to filter out UV radiation by absorbing some of its energy. Life on planet Earth needs this because too much UV at Earth's surface (where we all live) can be harmful to cell function.