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Top chart: Earth's climate has cycled between ice ages and warm interglacial periods, with each cycle taking tens of thousands of years or more. Middle chart: Global average temperature was in a cooling trend for thousands of years before fossil fuel based industrialization. Since then, it has increased about a full 1°C—in a time period less ...
The geologic temperature record are changes in Earth's environment as determined from geologic evidence on multi-million to billion (10 9) year time scales. The study of past temperatures provides an important paleoenvironmental insight because it is a component of the climate and oceanography of the time.
The curve shown in graphs of these reconstructions is widely known as the hockey stick graph because of the sharp increase in temperatures during the last century. As of 2010 [update] this broad pattern was supported by more than two dozen reconstructions , using various statistical methods and combinations of proxy records, with variations in ...
It was only in the 20th century that paleoclimatology became a unified scientific field. Before, different aspects of Earth's climate history were studied by a variety of disciplines. [5] At the end of the 20th century, the empirical research into Earth's ancient climates started to be combined with computer models of increasing complexity.
Global surface temperature (GST) is the average temperature of Earth's surface. More precisely, it is the weighted average of the temperatures over the ocean and land. The former is also called sea surface temperature and the latter is called surface air temperature. Temperature data comes mainly from weather stations and satellites.
On Thursday, the average global temperature reached 17.23 degrees Celsius, or 63.01 degrees Fahrenheit, the highest since NCEP records first started in 1979, according to the University of Maine's ...
This graph's main version resides at Template:Graph:World Historical Highlights. Please make or suggest all the changes there, and copy it everywhere else (until the copying is automated) Please make or suggest all the changes there, and copy it everywhere else (until the copying is automated)
However, maximum air temperature recorded that day was a mere 128 degrees Fahrenheit, because air is a poor heat conductor. Two other places in the world are in Death Valley’s shadow when it ...