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GLOSSARY

Our comprehensive earth science glossary is available to assist in your understanding of the MY NASA DATA microsets, lesson plans and computer tools. Please select the first letter of the word you wish to check for a definition and further information.

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All definitions
J
jet stream:
a current of fast moving air in the upper levels of the troposphere. Its position and strength relate to the surface temperature contrast between warm and cold areas on Earth.   UIUC tutorial on the jet stream Illustration of the jet stream
Image courtesy University of Illinois WW2010 Project
J
joule:
a standard unit of energy (radiation) or work (mechanics). For energy, one joule is equal to one watt second.   unit relationships
Image courtesy NASA

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