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Sun and Volcanic Eruptions Pace North Atlantic Climate Swings, ScienceDaily
Monday, September 13th 2010, 3:42 PM EDT
Co2sceptic (Site Admin)
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The upper panel shows the variations in North Atlantic Ocean basin wide sea surface temperatures in a simulation that includes historical variations in total solar irradiance and volcanic aerosols (blue), and in a simulation that in addition to the natural external 'forcings' also include anthropogenic 'forcings' for the last 150 years (red). Up to year 1900, the blue curve is consistent with available temperature observations, whereas only the red curve matches the observed temperature evolution in the 20th century. The lower panel shows variations in the large-scale ocean circulation in the Atlantic (black) and dates of major volcanic eruptions. (Credit: Image courtesy of University of Bergen)

ScienceDaily (Sep. 13, 2010) — A study presented in Nature Geoscience suggests that changes in solar intensity and volcanic eruptions act as a metronome for temperature variations in the North Atlantic climate.

A research team from the Bjerknes Centre for Climate Research in Bergen, Norway, has studied the climate in the North Atlantic region over the past 600 years using the Bergen Climate Model and the observed temperature evolution. They point to changes in the solar intensity and explosive volcanic eruptions as important causes for climate variations in the North Atlantic during this period.

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