Short title: A FOOTPRINT OF SOLAR ACTIVITY ON CLIMATE
Abstract. An 11-year variation is shown here to exist in an index of the atmospheric variability defined as the difference between the North Atlantic Oscillation and Arctic Oscillation indices. It is argued that this index is related to the second leading mode of the variability. The appearance of t...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.623.1322 http://trs-new.jpl.nasa.gov/dspace/bitstream/2014/14407/1/00-0842.pdf |
| Summary: | Abstract. An 11-year variation is shown here to exist in an index of the atmospheric variability defined as the difference between the North Atlantic Oscillation and Arctic Oscillation indices. It is argued that this index is related to the second leading mode of the variability. The appearance of the solar activity signal in this mode is in accord with modeling of the solar UV forcing by Shindell e t al., [2000]. However, the solar activity input to the atmosphere is weak and its effect has to be amplified. Here the amplification by stochastic resonance due to assistance of other drivers of the variability (volcanic aerosols, Quasi-Biennial Oscillation and El Nirio) is discussed. It is shown that these drivers have considerable power for the mode excitation at a half of the solar cycle period (5.5 years)-the necessary condition for stochastic resonance. 3 |
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