Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmgc51a0674m&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #GC51A-0674
Physics
1616 Climate Variability (1635, 3305, 3309, 4215, 4513), 1650 Solar Variability (7537), 3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513), 4918 Cosmogenic Isotopes (1150), 7536 Solar Activity Cycle (2162)
Scientific paper
Effects of solar cyclic variations on climate change at decadal to multi-decadal timescales have been investigated over the last 1100 years based on solar and climate proxies. Our previous studies on solar variations over the last 1100 years had shown that the length of the 11-year cycle is changing in time according to the long-term solar activity level. By the comparisons of climate proxies with reconstructed solar cycles, it is found that (i) influence of solar 11-year cycle on climate is persistent in time and that the decadal climate cycle is modulated by the variable solar 11-year cycle length, (ii) persistent influence of solar 22-year (Hale) magnetic cycle on climate, and (iii) the amplification of the 22-year cycle in climate variations around the prolonged solar minima such as the Maunder Minimum (1645-1715 AD). The dependence of climate on the polarity of solar magnetic field and the amplification of the effect of 22-year solar magnetic cycle around the Maunder Minimum can be explained by the solar forcing of climate through cosmic rays, whose property is determined by the feature of solar and the interplanetary magnetic field.
Masuda Kazuhiko
Miyahara Hirokazu
Yamaguchi Yasuhiko T.
Yokoyama Yfji
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