During the last few decades, average global temperatures and sea levels have risen and the ferocity of major storms and forest fires have increased. These changes deviate from climate trends over the last millenium or longer.
Glaciation in the Northern Hemisphere during the Wisconsin Ice Age about 20,000 years ago. Turquoise shading indicates the extent of the ice sheet about 3 km thick.
Bloom (2010) Global Climate Change: Convergence of Disciplines. Sinauer Associates.
The first person to note the recent warming trend in Earth’s climate and associate it with fossil-fuel emissions was Guy Stewart Callendar (1898–1964)....
State of the Climate in 2011Last Updated on 2012-07-11 00:00:00
Worldwide, 2011 was the coolest year on record since 2008, yet temperatures remained above the 30 year average, according to the 2011 State of the Climate report released online by the National Oceanic and Atmospheric Administration (NOAA).
Back-to-back La Niñas cooled globe and
influenced extreme weather in 2011
NOAA-led report examines climate conditions experienced around the world
The lead character of the 2011 climate story was a double dip La Niña, which chilled the Pacific at the start and end of the year. Many of the 2011 seasonal climate patterns around the world were consistent with common side effects of La Niña. More information.
Worldwide, 2011 was the coolest year on record since 2008, yet temperatures remained above the 30 year average, according to the 2011 State of the Climate report released online today by NOAA. The... More »
Early Climate Change ResearchLast Updated on 2010-11-12 00:00:00
The first person to note the recent warming trend in Earth’s climate and associate it with fossil-fuel emissions was Guy Stewart Callendar (1898–1964). Callendar’s father, Hugh Longbourne Callendar, a professor of physics at the Imperial College of Science, London, had developed the platinum resistance thermometer, an instrument that permitted precise, continuous recording of temperatures. Guy Stewart Callendar worked as a steam engineer for the British Electrical and Allied Industries Research Association, but he had inherited his father’s interest in temperature measurement and, as a hobby, scrutinized weather records from around the world.
Callendar examined historical trends in global average temperatures by grouping temperature data from the most reliable weather stations in given regions of the world and weighting the importance of each group... More »
Lecture: Stephen Schneider Climate Change Mitigation and Adaptation Video Last Updated on 2010-10-07 00:00:00
This video is of a lecture that Stephen Schneider presented a number of times. It covers climate change from a risk perspective, discussing the underlying science, uncertainties, and implications of different possible decisions. Here is it captured with many (although not all) of his graphics. It is a well organized, evenly presented lecture that carefully differentiates questions of "what we know" from "what we should do." It presents data and modelling at a level appropriate for undergraduates.
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