0. The Greenhouse Effect and Global Warming. Please take your assigned transmitter and swipe your student ID for attendance tracking. 0. The Temperature Structure of Earth’s Atmosphere. Exosphere: Heated by UV and X-rays from space. Thermosphere: Heated by X-rays from space.
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Exosphere: Heated by UV and X-rays from space
Thermosphere: Heated by X-rays from space
Stratosphere: Heated by UV radiation from space
Top of Ozone Layer
Troposphere: Heated by greenhouse effect
Atmosphere gets colder at larger distance from heat sources.
0 of 5Which type of radiation from the sun will not be absorbed in the Earth’s atmosphere and can thus heat the Earth’s surface?
0 of 5In which form is the Earth giving off heat energy?
0 of 5What happens to the infrared radiation re-emitted by the Earth’s surface in the troposphere?
Earth’s surface is heated by the sun’s (visible) light.
Heat energy is re-radiated from Earth’s surface as infrared radiation.
CO2, but also other gases in the atmosphere, absorb infrared light
→ Heat is trapped in the atmosphere.
0 of 5Which of the following is another greenhouse gas (in addition to CO2)?
Gases consisting of compounds of two or more different types of atoms:
Most common gases in Earth’s atmosphere (N2, O2) do not contribute to the greenhouse effect.
0 of 5Does the greenhouse effect occur naturally?
The Greenhouse Effect occurs naturally and is essential to maintain a comfortable temperature on Earth,
but human activity, in particular CO2 emissions from cars and industrial plants, is drastically increasing the concentration of greenhouse gases.
0 of 5Which was the hottest year on history since 1880?
Glacier National Park: Melting Glaciers
Melting ice cap at Antarctica (South Pole): Temperature increase by 4.5 0F since 1945
Dry lake near Orlando, Florida
Alaska: Permafrost subsiding: Warming by 3.5 0F since 1960
Dwindling penguin populations in Antarctica
Olympic Mountains: Tree populations invading mountain meadow
Dying coral reefs
0 of 5In which atmospheric layer is ultraviolet radiation from space primarily absorbed?
0 of 5Which molecule in the atmosphere is mainly responsible for the absorption of ultraviolet radiation from space?
0 of 5Which compound (used in some industrial processes like refrigeration and air conditioning) is destroying Ozone in the atmosphere?
0 of 5The destruction of the ozone layer is currently most obvious above …
Ozone (= O3) absorbs UV radiation (which has damaging effects on human and animal tissue), causing the heating of the stratosphere.
Chlorofluorocarbons (CFCs) (used, e.g., in industrial processes, refrigeration and air conditioning) destroy the Ozone layer.
Destruction of the ozone layer as a consequence of human activity is proven (e.g., growing ozone hole above the Antarctic);
Must be stopped and reversed by reducing CFC use, especially in developed countries!