Global warming does not mean all areas are warmer - Tucson News Now

Global warming does not mean all areas are warmer

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Global warming does mean that Earth's average temperature each year is getting warmer, but that does not mean all regions are experiencing warmer yearly temperatures. Some places of the world have seen a slight decrease in a yearly average temperature, but most have gone up. 

Think about this as your school grades. If one semester you get Cs and Bs, but the next semester you receive Cs and As. The 2nd semester your grade point average would be higher even as the Cs remained in place. This concept is happening around the world with our temperatures.

With Earth's many climates each one reacts different to a climate change, but overall most are warming which is counter acting the areas that are not. Take this winter as an example: The eastern half of the country was so cold, for so long. But the Western half of the country had well above normal temperatures. This equaled out the average temperature of the country for this past winter.

The southeastern area of the United States is one area in the world that is actually cooler now than years ago. Researchers have connected the cooling trend in the southeastern United States to periods of thick clouds and unusually high soil moisture. Thick clouds can decrease the amount of sunlight reaching Earth's surface, and damp soil allows for high evaporation rates, preventing daytime temperatures from getting as warm as they otherwise might.

But as you can see from the image above, the western half the country (Arizona) is warming at a very fast rate. Over the last decade our average temperature has risen over 1.5°. If this trend continue it can have negative consequences on the snow pack during the winter months. That could lead to a longer fire season (which we are already seeing) and water restrictions.

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