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GISS Land-Ocean Global Means Temperature, 1880-2016 [JSON] [iframe]

Chart uploaded last Thursday.

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The average land and ocean temperature globally between 1951-1980 was 56.7 degrees fahrenheit. NASA, with it's vast earth monitoring system of satelites and ground based equipment measure temperature around the globe to follow trends over time. They put out GISS numbers monthly and yearly, that look at the difference in temperature between the 1951-1980 average compared to today. Those numbers are widely cited on climate change blogs. While scientifically accurate, their analysis is confusing to the layman who finds it hard to understand negative and positive Celsius numbers of a few degrees.

Most of us know the weather only by Fahrenheit, and rather then use negative numbers and departure from the average, I used actual global temperature averages. In 2016, the global temperature was 58.42 degrees Fahrenheit. In contrast, in 1960, the global temperature was 56.2 degrees Fahrenheit. While 2.2 degrees Fahrenheit difference in global temperature over 66 years doesn't seem like a lot, it does mean spring comes earlier across the globe, areas freeze up later, and summer days are somewhat hotter. As the oceans are a powerful heat sink, actual global land temperature changes are less then 2.2 degree Fahrenheit difference between now and 1960, but still there is a noticeable increase there too.

Forces like el nino and la nina, and other weather patterns do change global temperatures a bit from year to year. But as carbon dioxide emissions have rapidly increased, so have temperatures. Within the next 20-30 years, it's almost certain global yearly temperatures will exceed 60 degrees Fahrenheit, which is a big jump from 56.25 degrees Fahrenheit at the turn of the 20th century.

Data Source: Combined Land-Surface Air and Sea-Surface Water Temperature Anomalies (Land-Ocean Temperature Index, LOTI). https://data.giss.nasa.gov/gistemp/

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