Posted on 09/02/2009 3:34:06 AM PDT by Kaslin
From the original source for the graph (NASA):
Summary
Abstract:
http://www.ncdc.noaa.gov/paleo/pubs/solanki2004/solanki2004.html
Direct observations of sunspot numbers are available for the past four centuries, but longer time series are required, for example, for the identification of a possible solar influence on climate and for testing models of the solar dynamo. Here we report a ... reconstruction of the sunspot number covering the past 11,400 years, based on dendrochronologically dated radiocarbon concentrations. We combine physics-based models for each of the processes connecting the radiocarbon concentration with sunspot number. According to our reconstruction, the level of solar activity during the past 70 years is exceptional, and the previous period of equally high activity occurred more than 8,000 years ago. We find that during the past 11,400 years the Sun spent only of the order of 10% of the time at a similarly high level of magnetic activity and almost all of the earlier high-activity periods were shorter than the present episode. Although the rarity of the current episode of high average sunspot numbers may indicate that the Sun has contributed to the unusual climate change during the twentieth century, we point out that solar variability is unlikely to have been the dominant cause of the strong warming during the past three decades.
The series of reconstructed 10-yr averaged sunspot numbers with their 68% uncertainty. Years are given BP (before present), i.e. the calendar AD year, Yad, is related to the BP year, Ybp, as Yc=1950-Ybp. The tabulated years correspond to centers of the corresponding 10-year intervals.
Negative values are artifacts and are consistent with zero within the error limits.
Thanks. I understand.
Thwe sun will explode and will fall into another dimension when the black hole is exposed!
Some folks have tried to correlate the 11 year sunspot cycle with the 11 year trip Jupiter makes around the sun. The numbers don’t exactly line up but close. I think sunspots are at their lowest when Jupiter is farthest away from the sun and at their highest when Jupiter is closest. Since Jupiter has a powerful magnetic field some folks think the magnetic effects predominate over the gravitational ones.
It's the same old thing as the day before yesterday.
This all can’t possibly mean that climate change is cyclical!!
Pfft - JG still appears to suffer from the delusion that carbon increase precedes temperature rise...Vostok core samples say temperature increase precedes carbon increase, a pattern that has held over millions of years.
Actually, the “official” SIDC count of sunspots has a ZERO for Aug.31, but they counted one on Sep.1.
The Spotless streak went to 52, one short of the record. That puny spot was gone on Sep.2
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