Home > Uncategorized > Arctic trees provide link between solar radiation and global warming

Arctic trees provide link between solar radiation and global warming

  • Rings of 400-year-old trees studied
  • Arctic cooled between 1950-1990
  • Warming link to solar activity

A STUDY of Arctic cooling cycles suggest warming is linked to solar activity.

By measuring the rings of 400-year-old Scots pine trees, German researchers at the University of Hohenheim in Stuttgart were able to determine periods of fast-growth activity associated with higher average temperatures.

They took their measurements from trees on the Kola Peninsula and compared it to 2004 data from the Swedish Laplan and Russian Siberia regions.

They found that temperatures between 1630 and 1840 cooled, then warming in the Arctic began – just after the end of the “Little Ice Age” and 30 years before the start of the Industrial Age.

The “Little Ice Age” refers to a 300-year cooling effect leading up to the Industrial Age in which the Arctic cooled by 0.4C.

That phase also coincided with a decline in solar radiation over the same period.

After reaching their peak between 1935 and 1957, the German researchers found summer temperatures in the Arctic then dropped by “one or two degrees” to 1990.

The new lows came through a modern phase associated with high emissions, yet still dropped to temperatures not seen since 1870, just as the Industrial Age began.

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