Climate change is affecting the entire planet. Changes in temperatures and changes in weather have-in the history of the Planet-always occurred naturally. Since the start of the industrial revolutions and man’s use of fossil fuels are causing changes. Changes that just in this last century are becoming more and more evident. In today’s article we are going to look at climate change, how temperatures are changing, and see a U.S. Climate Change Map from 1895 to 2021.
Temperature Anomaly Map
From 1895 to 2021 in the United States how did the temperature change? Here we will look at the annual average of anomalies in degrees fahrenheit. The map shows the evolution of this figure from 1895 to 2021 with a base of 1901-2000. At first glance, it can be seen that the average temperature anomalies in the United States have been constant since 1997. In fact, in 1997 the average temperature anomalies had a variation of +0.2°F. Variation since that year has always been positive with some years, 2012 above all, seeing a peak above 3 degrees.
The figure is worrying because it shows that for almost 25 years the growth in average temperatures has been constant. In the years prior to 1997 there had been peaks of anomalies. In 1990, degree growth had averaged 1.5°F. But temperatures were experiencing rises but also variations downward. If we analyze the 1960s, we can see that for many years temperatures were consistently below -0°F. But what happened in the early decades of the twentieth century now seems distant: the years with rising temperatures are now more and more.
What is a Temperature anomaly
But what does anomaly temperature mean and how is the figure calculated? “Anomaly temperature” means a deviation from a reference value-in this case the figure is 1901/2000-and it is annual. The higher the figure, the more it means there were anomalies with higher temperatures (red color). The lower the datum the lower the temperatures were (blue color).
Globally in 2019, it is estimated that the average temperature anomaly was +0.74°C. The figure since 1986 has always been above zero large centigrade. In this specific case, the average refers to the period 1961/1990.
From 1850 to 2019, average global temperatures grew by +1.11°C. The area with the greatest temperature growth is the Northern Hemisphere, which saw a +1.31°C increase from -0.28°C in 1850 to 1.01°C in 2019. The tropics had a change of +0.96°C and the Southern Hemisphere +0.91°C.
Average annual temperature in the U.S.
Many citizens are asking: has the average temperature in the United States changed? And if so, by how much? To help us answer this question, we used data from the National Centers for Enviromental information, which analyzes data from 1895 to the present. The average temperature in the United States in 2021 was 54.51 degrees Fahrenheit, which corresponds to 12.51 degrees Celsius. If we analyze the same data in 1895 we can see the growth in degrees Fahrenheit was more than 4 degrees.
But what is surprising about the figure in the graph is not so much the peak – reached in 2012 when 55.28 degrees F. was averaged across the United States, but the constancy of high temperatures over the past mdecades. In fact, from 1993 to the present, the temperature has been almost consistently above 53 degrees Fahrehneit. From 1895 to 19930 only once, in 1921, had it exceeded 50 degrees. This is significant and shows how the average temperature is rising structurally.
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