To 2040 A.D. By Climatologist Cliff Harris and Meteorologist Randy Mann Article and Chart Updated: April 8, 2020 Until late 2006, global temperatures were more than a degree Fahrenheit warmer when compared to the 20th Century average. (I say improbably, because aerosols are short-lived and cover a very limited area of the globe. This graph illustrates the change in global surface temperature relative to 1951-1980 average temperatures. Global temperatures reconstructed by taking a spatially-weighted average of 59 proxy sea surface temperature records from around the global oceans. Nineteen of the 20 warmest years all have occurred since 2001, with the exception of 1998. Two-thirds of the warming has occurred since 1975. If they cover, say, only 10% of the globe, then their cooling effect must be 1C in their area of effect to have even a small 0.1C global average effect). All records span the last 150,000 years, but the dataset degrades to approximately 10 records by 800,000 years ago. (Source: NASA/GISS). Even after these … World of Change: Sprawling Shanghai. Updated Dec 10, 2019. Atmosphere Heat Land Water Human Presence World of Change. 2016 was the third year in a row that global average surface temperature set a new record, and the fifth time the record has been broken since the start of the twenty-first century. The late 20th and early 21st century global warming - is it really "unprecedented"? Global Temperature Trends From 2500 B.C. The average global temperature has increased by a little more than 1° Celsius (2° Fahrenheit) since 1880. These records clearly show that the first decade of the 21st century was the warmest since the 1880s, and the first decade that the earth's average annual temperature rose above 14.5 °C (58 °F). The history of average global temperature is based on data gathered around the world at weather stations, on ships and by satellites. Actually, the real unprecedented warming and extreme climate change happened well before the industrial age, as the below paleo & ancient temperature proxy reconstruction charts reveal (for the most part, charts are in 'paleo-age' chronological order). This animation shows the yearly history of Earth's temperature since the modern record began in 1880. The year 2016 ranks as the warmest on record.

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