caa a22 4500 445302445 CHVBK 20180317142602.0 cr unu---uuuuu 170323e20101201xx s 000 0 eng 10.1134/S0001433810070042 doi (NATIONALLICENCE)springer-10.1134/S0001433810070042 Chronomics of climatic variations of tree ring width [Elektronische Daten] [K. Otsuka, G. Cornélissen, F. Halberg] Variations in the average annual tree rings of 11 sequoia trees for 2189 years are studied. The power spectrum of tree ring variations, calculated by the Maximum Entropy Method (MEM), is power-law in character with the coefficient β close to −1.00, suggesting the fractal character of the considered time series. The calculations of the coefficient β in a 200-year sliding window showed that this coefficient rapidly drops to zero or very small positive values, indicating a break in the fractal structure in some intervals. We identified seven such episodes, two (the latest) of which correspond to Spörer and Maunder solar minima. The other five episodes, which occurred around 100 BC and 500, 700, 820, and 880 AD, i.e., before regular sunspot observations, may also correspond to climate changes. By combining methods aimed at identifying the specific spectral components, such as the Schwabe cycle and behavior of the 1/f dependence as a chaos characteristic, the chronobiologic (chronomics) approach can be used to study the global climatic processes—such as cycles of about 500 years—bearing on global warming. Pleiades Publishing, Ltd., 2010 Chronoastrobiology nationallicence fractal scaling (1/ f dependence) nationallicence Spörer and Maunder minima of solar activity nationallicence Otsuka K. Medical Center East, Tokyo Women's Medical University, Tokyo, Japan aut Cornélissen G. University of Minnesota, Minneapolis, USA aut Halberg F. University of Minnesota, Minneapolis, USA aut Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/7(2010-12-01), 838-843 0001-4338 46:7<838 2010 46 11485 https://doi.org/10.1134/S0001433810070042 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0001433810070042 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Otsuka K. Medical Center East, Tokyo Women's Medical University, Tokyo, Japan aut NATIONALLICENCE 700 1- Cornélissen G. University of Minnesota, Minneapolis, USA aut NATIONALLICENCE 700 1- Halberg F. University of Minnesota, Minneapolis, USA aut NATIONALLICENCE 773 0- Izvestiya, Atmospheric and Oceanic Physics SP MAIK Nauka/Interperiodica 46/7(2010-12-01), 838-843 0001-4338 46:7<838 2010 46 11485 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer