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.
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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?
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The amount of water vapor in the air is called humidity.
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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.
Water can be in the atmosphere, on the land, in the ocean, and underground. It moves from place to place through the water cycle.
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Rain and dull clouds, windy blue skies, cold snow, and sticky heat are very different conditions, yet they are all weather.
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