排序方式: 共有70条查询结果,搜索用时 62 毫秒
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M. D. Kravchishina A. P. Lisitzin A. Yu. Lein V. N. Lukashin A. N. Novigatsky A. A. Klyuvitkin 《Doklady Earth Sciences》2016,467(1):284-288
The first data were obtained on the vertical chlorin flux in the water column and its accumulation in the upper layer of sediments of the Caspian Sea. Seasonal variability of the chlorine concentration in sedimentary matter was evaluated. The tendency of decrease in the phytoplankton-synthesized (allochtonous) organic matter content was revealed over approximately the past 60 years. 相似文献
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Ye. I. Polyakova Ye. A. Novichkova A. P. Lisitzin V. P. Shevchenko M. D. Kravchishina 《Oceanology》2016,56(2):289-300
Diatom algae, aquatic palynomorphs, and the grain-size of surface sediments from bays of the White Sea were investigated in a program dedicated to the study of marginal filters (MF) in the Severnaya Dvina, Onega, and Kem rivers. Three microalgal assemblages are established in surface sediments, which replace each other successively with distance from river mouths and are characterized by a gradual decrease in a share of freshwater species of diatoms and Chlorophyceae algae, significantly varying concentrations of marine diatoms and dinocysts due to changes in water salinity, grain-size composition of sediments, quantitative distribution of suspended particulate matter (SPM), and water productivity at different marginal filter stages. 相似文献
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Doklady Earth Sciences - The first results of studies of vertical particle fluxes in a hydrothermal sedimentary system of a subpolar area of the Mid-Atlantic Ridge under the influence of... 相似文献
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Oceanology - The article presents the results of studying the distribution and composition of dispersed sedimentary matter (suspended particulate matter, SPM) in the Barents Sea water column. The... 相似文献
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Novigatsky A. N. Lisitzin A. P. Shevchenko V. P. Klyuvitkin A. A. Kravchishina M. D. Politova N. V. 《Oceanology》2020,60(3):372-383
Oceanology - A new approach has been applied to studying marine sedimentation using dispersed sedimentary material in sediment traps compared to the surface layer of bottom sediments. Based on... 相似文献
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V. P. Shevchenko O. S. Pokrovsky A. S. Filippov A. P. Lisitsyn V. A. Bobrov A. Yu. Bogunov N. N. Zavernina E. O. Zolotykh A. B. Isaeva N. M. Kokryatskaya V. B. Korobov M. D. Kravchishina A. N. Novigatsky N. V. Politova 《Doklady Earth Sciences》2010,430(2):228-234
New data on the elemental composition of the Severnaya Dvina River, the largest one in the White Sea region, are presented. The elemental composition of the river water in May, the period of the snowmelt flood, is similar to the upper layer of the Earth’s continental crust due to the active erosion of the earth material in the catchment area. In August, the period of the summer low water, the impact of biogenic components increases and elevated concentrations of Cd, Sb, Mn, Zn, Pb, and Cu are observed. At other times, no significant pollution by heavy and rare-earth elements is registered. 相似文献
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Maslov A. V. Politova N. V. Shevchenko V. P. Kozina N. V. Novigatsky A. N. Kravchishina M. D. 《Doklady Earth Sciences》2019,485(1):298-302
Doklady Earth Sciences - The Co, Hf, Ce, Cr, Th, and REE characteristics are analyzed for modern sediments collected by a bottom grab during the 67th and 68th cruises of R/V Akademik Mstislav... 相似文献
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Oceanology - The multidisciplinary expedition “European Arctic-2020” on board the R/V Akademik Mstislav Keldysh took place from July 31 to August 26, 2020. The investigations were... 相似文献