Blog

Visit Dr. Hansen’s Webpage

April 2019 Global Temperature Update

by |May 16th, 2019

April 2019 Global Temperature Update April 2019 was 2nd warmest April in the 140-year instrumental record at +0.99°C relative to 1951-1980 (2016 was +1.07°C).  So far 2019 is the 3rd warmest year (right graph), but residual global warming (which lags Niño3.4 several months) from the weak El Niño may make 2019 the 2nd warmest year…. read more

Categories: Blog

March 2019 Global Temperature Update

by |April 15th, 2019

March 2019 Global Temperature Update March 2019 was the 3rd warmest March in the 140-year instrumental record, at +1.11°C relative to the 1951-1980 mean (2016 was +1.31°C, 2017 was +1.13°C).  Tell that to people in the Northern and Midwestern United States, regions hit by brutal cold and heavy snow! The map of temperature anomalies shows… read more

Categories: Blog

February 2019 Global Temperature Update

by |March 18th, 2019

February 2019 Global Temperature Update Global temperature in February 2019 (at +0.92°C relative to 1951-1980 base period) was third warmest February in the 140-year record since 1880.  Warmest Februarys were 2016 (+1.34°C) and 2017 (+1.12°C).   February temperature anomalies cover a huge range, as much as 6-8°C colder than the 1951-1980 mean in much of western… read more

Categories: Blog

January 2019 Global Temperature Update

by |February 15th, 2019

January 2019 Global Temperature Update Global temperature in January 2019 (at +0.88°C relative to 1951-1980 base period) was the fourth warmest January in the 140-year record since 1880.  The warmest Januarys were 2016 (+1.15°C), 2017 (+0.97°C) and 2007 (+0.94°C). Northeastern Canada was unusually cool (as much as 3.6°C below the 1951-1980 mean), but areas in… read more

Categories: Blog

Global Temperature in 2018 and Beyond

by |February 6th, 2019

Global Temperature in 2018 and Beyond 06 February 2019 James Hansen[1], Makiko Sato[1], Reto Ruedy[2],[3], Gavin A. Schmidt[3], Ken Lo[2],[3] [1] Earth Institute, Columbia University, New York, NY [2] SciSpace LLC, New York, NY [3] NASA Goddard Institute for Space Studies, New York, NY Abstract.  Global surface temperature in 2018 was the 4th highest in… read more

Categories: Blog

Monarchs 2018

by |January 31st, 2019

Looking for good news? Last summerwe were so pleased to see so many Monarchsin Pennsylvania and New York, more than we have seen in a decade. Eagerly awaited number of over-wintering population in Mexico confirms this impression. See updated graph below, and link to an article in the Guardian. This refers to the Monarchs in… read more

Categories: Blog

Climate Change in a Nutshell: The Gathering Storm

by |December 18th, 2018

Climate Change in a Nutshell: The Gathering Storm Please access Dr. Hansen’s new Communication “Climate Change in a Nutshell: The Gathering Storm” here.

Categories: Blog

November 2018 Global Temperature Update

by |December 17th, 2018

November 2018 Global Temperature Update November 2018 global temperature, at 0.77°C relative to the 1951-1980 base period, tied with 2010 as the fifth warmest November since reliable data began in 1880.  Most people, however, care more about the temperature where they live.  For people in North America, except those on the West Coast, November was… read more

Categories: Blog

Two Gentlemen

by |November 28th, 2018

Two Gentlemen 28 November 2018 James Hansen It was about two decades ago, I think, when Jeff Sachs introduced me to Gerry Lenfest.  It was at one of Jeff’s big shindigs where he brings in scores of important people from around the world to address big problems, matters that Jeff can somehow speak to eloquently… read more

Categories: Blog

October 2018 Global Temperature Update

by |November 15th, 2018

October 2018 was the second warmest October since 1880.  At +0.99°C (relative to 1951-1980) it trailed only October 2015 (+1.08°C). Extreme regional temperature anomalies in the Northern Hemisphere (see map), as much as +6-8°C in Siberia and minus 2-3°C in North America were evidently related to a wind anomaly carrying warm air in a northeasterly… read more

Categories: Blog