Explanation:
Weather refers to the short-term atmospheric conditions in a specific area at a specific time (e.g., temperature, rainfall today). Climate is the long-term average of weather patterns over 30 years or more in a region.
What is the name of the phenomenon where there is a large-scale pattern of sea level pressure differences between the Aleutian Islands and the Pacific Northwest?
Explanation:
The Pacific-North American (PNA) pattern is a climate pattern characterized by sea level pressure differences between the Aleutian Islands (Aleutian Low) and the Pacific Northwest, influencing the weather in North America.
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