What is ozone column depth? In what units is it measured?
What will be an ideal response?
Ozone column depth, measured in Dobson Units (DU), is a measure of the total number of ozone molecules above a unit area of surface.
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Uniformitarianism is the assumption that ____
a. principles of one branch of science apply to other branches of science b. catastrophic events don’t impact Earth processes c. younger sedimentary rocks are at the top of rock sequences d. current rates of atmospheric warming are unsustainable e. present-day geological processes also occurred in the past
The Three Gorges Dam was recently completed on this river:
A) Xi Jiang B) Huang He C) Amur D) Chang Jiang
Which of the following would cause a negative forcing?
A) An increase in the burning of fossil fuels, leading to an increase in greenhouse gases in the atmosphere B) A large volcanic eruption spewing ash high into the atmosphere, blocking sunlight around the world for years until the ash cloud slowly dissipates C) Snow-covered ice sheets in Greenland melting and revealing bare rock D) All of these scenarios would cause a negative forcing.
Which of these is unlikely to result from climate change?
A) the change in distribution patterns of birds. B) an increased land area in some countries due to the melting of glaciers. C) increased drought in agricultural regions resulting in famine. D) warmer average temperatures. E) movement of tectonic plates.