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41.
E. G. Vologina M. Sturm I. A. Kalugin A. V. Darin A. S. Astakhov G. P. Chernyaeva A. N. Kolesnik A. A. Bosin 《Doklady Earth Sciences》2016,469(2):841-845
Integrated studies were performed on bottom sediments collected in the Chukchi Sea in the northern part of the Gerald Canyon 150 km northeast from Wrangel Island. The recent sedimentation rate amounted to 0.9 mm/year by 210Pb at the sampling site. The concentrations of biogenic components (SiO2bio, Сorg, Ntot, and Br) were minimum at the lower part of the core, where an increase of Thalassiosira antarctica antarctica, probably results from low biological productivity during the Maunder Minimum. The increased concentrations of biogenic components, as well as the decreased values of magnetic susceptibility and X-ray density, in the upper part of the core (1–2 cm) correspond to the last decade of recent of global warming. 相似文献
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A. S. Astakhov G. M. Kolesov O. V. Dudarev M. V. Ivanov A. N. Kolesnik 《Geochemistry International》2010,48(12):1208-1219
Abundance of noble metals (NM) and bulk chemical composition have been studied in bottom sediments of the Chukchi Sea. Distribution
of NM and their correlation with major and trace elements in the sediments have been analyzed using multicomponent statistics.
It was established that the average contents of NM in the bottom sediments of the Chukchi Sea significantly exceed those both
in shelf terrigenous sediments and stratisphere. Osmium and iridium enrich mixed and pelitic sediments relative to shallow-water
areas and their influx is presumably determined by erosion of coastal and bottom loose deposits. High Ag, Ru, Au, and Pt contents
were identified in the clayey sediments enriched in biogenic elements in the individual areas of the Southern Chukchi plain
(Chukchi sea) confined to the intersection zones of submeridional and sublatitudinal structures of the graben-rift system,
which was formed in the Mesozoic and activated in the late Cenozoic time. 相似文献
43.
Kolesnik A. N. Kolesnik O. N. Astakhov A. S. Vologina E. G. 《Doklady Earth Sciences》2019,487(2):943-949
Doklady Earth Sciences - The quantitative characteristics of the bottom sediment color of the Chukchi Sea is presented. The correlation relationships with the contents of grain-size fractions,... 相似文献
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A. S. Astakhov E. G. Vologina A. V. Dar’in I. A. Kalugin V. V. Plotnikov 《Russian Meteorology and Hydrology》2018,43(4):251-257
The sedimentary cores from the southern and northern parts of the Chukchi Sea illustrate the influence of climate and environmental conditions on the chemical composition of bottom sediments accumulated at present and in the recent 500 years. The low concentration of biogenic (Ca, Br, Sr) and some redox-sensitive (Fe, Mn, Zn) elements is typical of the recent sediments accumulated in the areas with permanent ice cover and of the sediments accumulated during cold periods (Little Ice Age and especially the Maunder Minimum). The possibility is revealed of identifying cyclic changes in environmental conditions including sea ice extent in the concrete Arctic areas. This may be used to detail the regional forecast of future changes. 相似文献
46.
V. V. Kalinchuk A. S. Astakhov V. F. Mishukov K. I. Aksentov 《Russian Meteorology and Hydrology》2013,38(5):313-319
Presented are the results of measuring the concentration of atomic mercury Hg0 on August 28–30, 2012 in the atmospheric surface layer over the Ussuri Bay in the Sea of Japan during the typhoon Bolaven passage. It is revealed that the Hg0 concentration during this period varied from 1.7 to 3.3 ng/m3. The maximum values were observed at the coming of mercury-enriched air masses from the Yellow Sea area at the simultaneous decrease in the air pressure and increase in the wind speed. 相似文献