Sunday, 17 April 2016

Global temperature rise from 1890-1910 - 1.58°C or 2.84°F.

March temperature

Above image shows Land-Ocean (in red) and Land-only (in black) global monthly temperature anomalies compared to the average over the period 1951-1980.

Arctic News,
16 April, 2016

At the Paris Agreement, nations committed to strengthen the global response to the threat of climate change by holding the increase in the global average temperature to well below 2°C above pre-industrial levels and to pursue efforts to limit the temperature increase to 1.5°C above pre-industrial levels.

To see how much temperatures have risen compared to pre-industrial levels, a comparison with the period 1951-1980 does not give the full picture. The image below, created by selecting a smoothing radius of 1200 km, shows that the global temperature rise from 1890-1910 was 1.58°C or 2.84°F.

The temperature rise is even higher when looking at measurements from land-only stations. The image below compares the March 2016 temperature with the period from 1890-1910 (250 km smoothing), showing a Land-only anomaly of 2.42°C or 4.36°F.

Taking into account that temperatures had already risen by some 0.3°C (0.54°F) before 1900, this adds up to a total temperature rise on land in March 2016 of 2.72°C (4.9°F) from the start of the industrial revolution.In February 2016, NASA data show that it was 2.33°C (4.19°F) warmer on land (with 1200 km smoothing) than it was in 1890-1910, while it was 2.48°C (4.46°F) warmer for a 250 km smoothing radius for the land-only data. In an earlier post, a 2.3°C rise in February 2016 was used as one of several elements making up the total rise that could eventuate by the year 2026, assuming that no geoengineering will take place (image below).

The situation is dire and calls for comprehensive and effective action, as described in the 
Climate Plan.

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