Monthly Archives: November 2012

Sunspot Number reconstruction by Leif Svalgaard and proxy cycles of 104 and 208 years

In an article on WUWT, “Solar Activity – Past, Present, Future“, Leif Svalgaard describes the problems of historical sunspot records because of changes in instrumentation and observers. He produces a new series which attempts to correct for the various problems. He … Continue reading

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60 Year Cycle in Global Sea Level

Geophysical Research Letters publishes a letter with the question Is there a 60-year oscillation in global mean sea level? recently. It is well known that a cycle of about this period strongly influences global temperatures, with highs around 1940 and … Continue reading

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