Teleconnections: Changes in Weather Linked Together
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Trees contain some of nature's most accurate evidence of the past. Their growth layers, appearing as rings in the cross section of the tree trunk, record evidence of disastrous floods, insect attacks, lightning strikes, and even earthquakes that occurred during the lifespan of the tree. They also hold excellent records of climate.
Factors that have the power to change global climate can be natural, like volcanic eruptions and changes in solar energy, or caused by humans, like the addition of greenhouse gases to the atmosphere.
Resource Type: Information
Over the past century, the global average temperature has warmed. Learn the science of why this has happened, and what the future holds.
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Air moves around the planet in a consistent pattern, called atmospheric circulation. Learn how convection and the spinning of the Earth create the prevailing winds.
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How do we know what the pressure is? How do we know how it changes over time?
Resource Type: Information
The amount of water vapor in the air is called humidity.
Resource Type: Information
A guest post by NCAR scientist Peggy Lemone - How do you measure rain? And how accurate are the measurements?
Artists often used colors other than white to portray snow.