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V. I. Bekoryukov V. N. Glazkov G. A. Kokin 《Izvestiya Atmospheric and Oceanic Physics》2009,45(5):566-574
Monthly mean values of the global (averaged over the Earth’s surface) total ozone content (GO) are constructed on the basis
of data of the global ozonometric network from 1964 to 2006, and their trends are calculated. A very strong relationship between
the GO and solar activity, in particular, the index F10.7, is detected. This relation considerably exceeds the relation that
solar activity has to other meteorological parameters. The unexpectedly strong GO decrease observed from the mid-1970s to
the mid-1990s cannot be explained by anthropogenic impact alone. 相似文献
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The Influence of Climate Change on the Intensity of Ice Gouging of the Bottom by Hummocky Formations
Ogorodov S. A. Arkhipov V. V. Baranskaya A. V. Kokin O. V. Romanov A. O. 《Doklady Earth Sciences》2018,478(2):228-231
Doklady Earth Sciences - In the present work, several results of repeated sounding of bottom ice gouging microrelief within the area of the underwater pipeline crossing of the Baydaratskaya Bay,... 相似文献
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Using the equations of ozone transport and measurements of the vertical ozone distribution and atmospheric parameters above Seva (1987–1988) and Amundsen-Scott (1987) stations, the vernal ozone destruction has been calculated for the cited periods. The values of chlorine and bromine oxides have been estimated. It has been indicated that a rather high ozone destruction was observed in 1987 above Seva and Amundsen-Scott stations, which was caused by high concentrations of ClO and BrO. In 1988, the temperatures at levels of 14–16 km were increased to 210–220 K, and ozone destruction was less pronounced and was caused by the meridional transport of ClO and BrO form the inner Antarctic regions due to the ingression of the Australian anticyclone on the Antarctic continent. 相似文献
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Isotopic compositions of C, O, and Sr in carbonates, as well as Rb-Sr systems in the silicate material from Upper Precambrian
and Lower Cambrian rocks exposed by the Chapa River in the northern Yenisei Ridge, are studied. The Late Precambrian part
of the section includes the following formations (from the bottom to top): Lopatinskaya (hereafter, Lopatino), Vandadykskaya
(hereafter, Vandadyk) or Kar’ernaya, Chivida, Suvorovskaya (hereafter, Suvorovo), Pod”emskaya (hereafter, Podyom), and Nemchanka.
They are characterized by alternation of horizons with anomalously high and low δ13C values (such alternation is typical of the ∼700–550 Ma interval). The lower, relatively thin (20 m), positive excursion
(δ13C up to 4.3‰) was established in dolomites from the lower subformation of the Vandadyk (Kar’ernaya) Formation (hereafter,
lower Vandadyk subformation). The upper positive excursion (δ13C = 2.2 ± 0.6‰) was recorded in the 3-km-thick Nemchanka Formation enriched in terrigenous rocks. The lower negative excursion
stands out as uniform, moderately low δ13C values (−2 ± 1‰) and significant thickness. It comprises the upper part of the Vandadyk Formation, as well as Chivida and
Podyom formations. The upper negative excursion is related to a thin (∼20 m) marker carbonate horizon of the upper Nemchanka
subformation, in which δ13C values fall down to −8.3‰. The lower part of the Lebyazhinskaya (hereafter, Lebyazhino) Formation, which overlies the Nemchanka
Formation, shows a step-by-step increase in δ13C from −2.2 to 2.5‰ typical of the Vendianto-Cambrian (Nemakit-Daldyn Horizon/Stage) transitional sequences. The absence of
relationships between the carbon and oxygen isotope compositions and other parameters of postsedimentary alterations suggests
that the excursions characterized above could form at the sedimentation stage and coincide in general with δ13C fluctuations in seawater. The value of 87Sr/86Sr = 0.7076−0.7078 in limestones of the Podyom Formation points to their early Ediacaran age. Values of 87Sr/86Sr = 0.70841 and 0.70845 in dolomites of the lower Lebyazhino subformation correspond to the Early Cambrian. The Rb-Sr systems
of the clay material from the Vandadyk and Chivida formations are approximated by a straight line, parameters of which correspond
to the age of 695 ± 20 Ma (87Sr/86Sr0 = 0.7200 ± 0.0013) and probably characterize the epigenetic stage of older sedimentary rocks, which were subjected to very
rapid exhumation and “polar” sulfuric acid weathering in the course of glacioeustatic regression. 相似文献
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Doklady Earth Sciences - The results of investigations of the landforms and sediments in the marginal zone of the Aldegonda Glacier are presented. As a result of the geomorphological analysis of... 相似文献
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