Question

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a. By what percentage does the graph show increase in global mean temperature between
end of the 19th century and the end of the 20th century?
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Answer 1

Answer:

In 2019, the average temperature across global land and ocean surfaces was 1.71°F (0.95°C) above the twentieth-century average of 57.0°F (13.9°C), making it the second-warmest year on record.

The global annual temperature has increased at an average rate of 0.07°C (0.13°F) per decade since 1880 and over twice that rate (+0.18°C / +0.32°F) since 1981.

The five warmest years in the 1880–2019 record have all occurred since 2015, while nine of the 10 warmest years have occurred since 2005.

From 1900 to 1980 a new temperature record was set on average every 13.5 years; since 1981, it has increased to every 3 years.

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