Solar Changes and Climate Changes. (Invited)

Details Solar Changes and Climate Changes. (Invited) Solar Changes and Climate Changes. (Invited)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsh14a..01f&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SH14A-01

Astronomy and Astrophysics

Astrophysics

[7536] Solar Physics, Astrophysics, And Astronomy / Solar Activity Cycle

Scientific paper

During the early decades of the Space Age there was general agreement in the scientific community on two facts: (1) sunspot cycles continued without interruption; (2) decadal timescale variations in the solar output has no effect on Earth’s climate. Then in 1976 Jack Eddy published a paper called ‘The Maunder Minimum” in Science magazine arguing that neither of these two established facts was true. He reviewed the observations from the 17th century that show the Sun did not appear to cycle for several decades and he related that to the cold winters in Northern Europe at that time. The paper has caused three decades of hot discussions. When Jack Eddy died on June 10th of this year the arguments were sill going on, and there were no sunspots that day. The Sun was in the longest and deepest solar minimum since 1900. In this talk I will describe the changes in the solar output that have taken place over the last few decades and put them in their historical context. I will also review recent work on the influence of decadal and century scale solar variations on the Earth’s climate. It is clear that this long, deep “solar minimum” is an opportunity to make fundamental progress on our understanding of the solar dynamo and to separate climate change due to the Sun from anthropogenic climate change.

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