The future glacial cycle and its reflection in the glacial cycles of the Late Pleistocene

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Дәйексөз келтіру

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Аннотация

As a result of applying the principle of symmetry and the similarity property to the glacial cycles of the Late Pleistocene, an analogy was found in the climate dynamics of the Milankovich glacial cycles. This made it possible to outline the future glacial cycle, determine its configuration and duration.

Толық мәтін

Рұқсат жабық

Авторлар туралы

N. Vakulenko

Shirshov Institute оf Oceanology, Russian Academy of Sciences

Хат алмасуға жауапты Автор.
Email: vanava139@yandex.ru
Ресей, Moscow

D. Sonechkin

Shirshov Institute оf Oceanology, Russian Academy of Sciences

Email: vanava139@yandex.ru
Ресей, Moscow

Әдебиет тізімі

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2. Fig. 1. The LR04 time series of variations in the δ18O content in oceanic sediments of benthic foraminifera over the last 900 kyr is divided into two parts of 450 kyr (а–б). Two similar intervals with a length of 120 kyr and one interval with a length of 60 kyr years are shown (gray rectangles); the numbers (kyr) indicate the maxima of interglacial periods; the corresponding marine isotopic stages are indicated in brackets (Tzedakis et al., 2017); the vertical black dotted lines drawn through the main interglacial maxima separate the 9 glacial cycles, indicated by Roman numerals. The Y-axis is inverted

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3. Fig. 2. Comparison of glacial cycles before and after reflection relative to the time point 405 ka; a gray rectangle marks the time interval for reflection. The Y-axis is inverted. Nine glacial cycles from IX to I (а); variations of orbital parameters (Laskar et al., 2004): eccentricity and precession parameter (б), obliquity parameter (в)

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4. Fig. 3. Comparison of three pairs of glacial cycles according to the δ18O data of the LR04 chronology. A vertical dotted line is drawn through the maxima of the common interglacial periods of each pair of glacial cycles. Roman numerals indicate the numbers of glacial cycles from the present time. The Y-axis is inverted. The gray rectangle marks the temporal interval 0±60 kyr. The black lines depict pairs of glacial cycle I–0, V–IV, IX–VIII, in the left halves of the graphs, the I, V and IX glacial cycles are depicted in gray, respectively (а, б, в). The arrows point to the IV glacial cycle (black line) superimposed on the future (0) glacial cycle (а)

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5. Fig. 4. Comparison of two pairs of glacial cycles I–0 and V–IV of the LR04 chronology. The vertical black line is drawn through the main maxima of the interglacial periods of glacial cycles IV and 0 – 405 ka and 2 ka, respectively; the Y-axis is inverted; the curly brackets indicate the scales of the reconstruction, the horizontal dotted lines in the wavelet transform amplitude patterns are drawn through the wavelet scales of 23 and 41 kyr. Glacial cycles I–0 (−119–0–123 ka) and their complex reconstruction, obtained using the inverse wavelet transform in the scale range from 16 to 64 kyr, the real component of the reconstruction is a black line, the imaginary component is gray (а); the amplitude pattern of the wavelet transform using the Morlet wavelet function; the areas of increased amplitude values are blackened (б); the same as (а–б), but for V–IV glacial cycles (491–329 ka) (в–г)

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6. Fig. 5. Phase trajectories of climate dynamics for V–IV glacial cycles (above) and for the last and future (I–0) glacial cycles (below), obtained from components of the complex reconstruction of δ18O content variations in the LR04 series in the range of wavelet scales from 16 to 64 kyr

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