|Cosmic ray intensity is inversely related to solar activity. High solar activity is indicated by low cosmic ray intensity, as shown by graphs B, C, and D at different timescales.|
Tuesday, January 22, 2013
Paper finds solar activity at end of 20th century was at highest levels of past 9,000 years
A 2012 paper published in the Proceedings of the National Academy of Sciences reconstructs solar activity from isotopes in ice cores and tree rings, and finds solar activity at the end of the 20th century was at the highest levels of the past 9,000 years. The paper confirms other peer-reviewed publications indicating that the Sun was particularly active during the 20th century in comparison to the past several millenia In addition, the authors find good agreement between solar activity and the Asian climate as determined from stalagmites in the Dongge cave, China.
Posted by MS at 5:13 PM