This investigation is part of the NASA: Mission Geography Module "What are the causes and consequences of climate change?" that guides students through explorations in climatic variability and evidence for global climate change.
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In this activity, students explore three indicators of drought are: soil moisture, lack of precipitation, and decreased streamflows. Students investigate each of these parameters develop a sense for the effects of drought on land.
Scientists are interested in learning how the vegetation (collection of plants) of an area can be used to study Earth's climate.
Check out this the Arctic and Earth SIGNs video to explore how climate models are used in climate change research.