Sergey A. Gorbarenko
Russian Academy of Sciences
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Featured researches published by Sergey A. Gorbarenko.
Paleoceanography | 2015
Eugene P. Chebykin; Sergey A. Gorbarenko; Ol'ga G. Stepanova; Vsevolod S. Panov; Evgeny L. Goldberg
The previously dated deepwater sediment core MR06-04 PC-7R (length 1723 cm; 350 kyr) recovered from the central Okhotsk Sea (OS) was analyzed for biogenic compounds and for 63 chemical elements (using the inductively coupled plasma–mass spectrometry method) with a high resolution (1 cm; ~200 years). A one box model with two main members” and mathematical methods (based on multielemental composition of sediments) for the calculation of weight fractions (at each time slice) of two main types of geochemical facies that dominate during considerably diverse climatic periods (glacial maxima and interglacial optima) were proposed and tested. This model can be applied to other analogous natural systems whose sedimentation is driven by two main types of geochemical facies. The application of the developed model to the studied core revealed that variations of weight fractions of the typical interglacial and glacial geochemical facies in the sediments along the core depth (named as warm and cold “covariators,” respectively) change synchronously with global and regional climate variability. Profiles of warm and inversed cold covariators coincide tightly, and their values increase during warm marine isotope stages and substages and decrease during cold ones over the last 350 kyr. Millennial scale changes in covariators had occurred simultaneously with abrupt variability in the OS productivity and sediment lithology and with millennial global climate variability. Some discrepancies in the warm and inversed cold covariators calculated using specific mathematical treatments revealed the episodic influence of volcanogenic matter presented in the core by visible tephra layers and cryptotephras.
Oceanology | 2010
A. A. Bosin; S. P. Zakharkov; Sergey A. Gorbarenko
Using the authors’ data obtained during expeditions to the Sea of Okhotsk during the last decade, the primary phytoplankton production and the distribution of organic carbon and chlorophyll a degradation products (chlorin) in the bottom sediments were studied. Using the authors’ and published data, the spatial distribution of the production and paleoproduction indicators was plotted. The ratios of the chlorin and Corg content in the sediments was considered, and the correlation between these parameters was revealed. It was shown that the average annual primary production of phytoplankton and the paleoproduction indices were maximum in the coastal and upwelling zones and decreased towards the sea’s center. A quantitative correlation was found between the distribution of the present primary production in the photic layer and that of the rates of the accumulation of organic matter buried within the surface sediments. As a result, it was shown that the content of chlorin and Corg in the marine bottom sediments may be used to reconstruct the paleoproduction variability of the past.
Oceanology | 2016
A. A. Bosin; Sergey A. Gorbarenko
Variations in the content of chlorin (a derivate of chlorophyll a) in 11 cores of bottom sediments from different parts of the Sea of Okhotsk are studied. The data show variations in paleoproductivity of this sea for the past 160000 years from the end of marine isotope stage (MIS) 6 until recently. A common pattern of the variation in paleoproductivity is established for the entire Sea of Okhotsk. During the interglacials (MIS 5e and 1), productivity increased, and in glacial periods, it decreased, probably due to the longer lasting marine ice cover throughout the year. The features of variations in productivity through time are recorded in the eastern part of the sea, which is more prone to the influence of inflowing Pacific waters.
Journal of Oceanography | 2007
Sergey A. Gorbarenko; Evgenia L’vovich Goldberg; Michaele Kashgarian; Tat’yana Alekseevna Velivetskaya; S. P. Zakharkov; Vladimir Stepanovich Pechnikov; Alexandr Anatol’evich Bosin; Olga Yur’evna Psheneva; Elena Diamilevna Ivanova
Deep-sea Research Part Ii-topical Studies in Oceanography | 2012
Naomi Harada; Miyako Sato; Osamu Seki; Axel Timmermann; Heiko Moossen; James Bendle; Yuriko Nakamura; Katsunori Kimoto; Yusuke Okazaki; Kana Nagashima; Sergey A. Gorbarenko; Akira Ijiri; Takeshi Nakatsuka; Laurie Menviel; Megumi O. Chikamoto; Ayako Abe-Ouchi; Stefan Schouten
Deep-sea Research Part Ii-topical Studies in Oceanography | 2012
Sergey A. Gorbarenko; Naomi Harada; Mikhail I Malakhov; Tatyana Velivetskaya; Yuriy P. Vasilenko; Aleksandr A. Bosin; Aleksandr N. Derkachev; Evgenyi L. Goldberg; Aleksandr V. Ignatiev
Global and Planetary Change | 2010
Sergey A. Gorbarenko; Naomi Harada; Mikhail I Malakhov; Yuriy P. Vasilenko; Aleksandr A. Bosin; Evgenyi L. Goldberg
Global and Planetary Change | 2014
Sergey A. Gorbarenko; Antonina V. Artemova; Evgeniy L. Goldberg; Yuriy P. Vasilenko
Quaternary Geochronology | 2014
Sergey A. Gorbarenko; Eugene P. Chebykin; Evgeny L. Goldberg; Ol'ga G. Stepanova; Huahua Lu
Russian Geology and Geophysics | 2009
M.I. Malakhov; Sergey A. Gorbarenko; G.Yu. Malakhova; N. Harada; Yu.P. Vasilenko; Aleksandr A. Bosin; E.L. Gol'dberg; A.N. Derkachev