Possible correlation between solar and volcanic activity in a long-term scale

Details Possible correlation between solar and volcanic activity in a long-term scale Possible correlation between solar and volcanic activity in a long-term scale

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.535..393s&link_type=abstract

In: Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2

Computer Science

Earth: Volcanic Activity, Solar Activity, Solar-Terrestrial Relations

Scientific paper

Volcanic activity on the Earth is described by special annual indices available since 1500. These indices have been compared with annual sunspot numbers. Volcanic activity displays no 11-yr periodicity. Using 21-yr running averages a striking similarity between these two time series is clearly seen. Volcanic activity is generally lower in periods of prolonged maxima of solar activity and higher in periods of prolonged solar minima. There is also a similarity between the spectra of these two series in the long-period range. Main peaks are located in the same periods in both series (200-215 yr, 100-105 yr, 80-90 yr). The influence of volcanic activity on the climte is indubitable. Annual means of surface air temperature display similar long-term periodicity as the volcanic activity.

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