Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН

/ O. S. Pokrovsky [et al.] // C. R. Geosci. - 2012. - Vol. 344, Is. 11.12.2013. - P663-677, DOI 10.1016/j.crte.2012.08.003. - Cited References: 81. - This work was supported by ANR "Arctic Metals", LIA "LEAGE", PICS No. 6063, GDRI "CAR WET SIB", grants RFBR-CNRS Nos 12-05-91055, 08-05-00312_a, 07-05-92212-CNRS_a, 08-04-92495-CNRS_a, CRDF RUG1-2980-KR10, Federal Program RF "Kadry" (contract N 14.740.11.0935), and Programs of Presidium RAS and UrORAS. . - 15. - ISSN 1631-0713РУБ Geosciences, Multidisciplinary

Аннотация: Warming of the permafrost accompanied by the release of ancient soil organic carbon is one of the most significant environmental threats within the global climate change scenario. While the main sites of permafrost carbon processing and its release to the atmosphere are thermokarst (thaw) lakes and ponds, the main carriers of carbon and related major and trace elements from the land to the Arctic ocean are Russian subarctic rivers. The source of carbon in these rivers is atmospheric C consumed by chemical weathering of rocks and amplified by plant uptake and litter decomposition. This multidisciplinary study describes results of more than a decade of observations and measurements of elements fluxes, stocks and mechanisms in the Russian boreal and subarctic zone, from Karelia region to the Kamchatka peninsula, along the gradient of permafrost-free terrain to continuous permafrost settings, developed on various lithology and vegetation types. We offer a comprehensive, geochemically-based view on the functioning of aquatic boreal systems which quantifies the role of the following factors on riverine element fluxes: (1) the specificity of lithological substrate; (2) the importance of organic and organo-mineral colloidal forms, notably during the snowmelt season; (3) the phenomenon of lakes seasonal overturn; (4) the role of permafrost within the small and large watersheds; and (5) the governing role of terrestrial vegetation in element mobilization from rock substrate to the river. Care of such a multiple approach, a first order prediction of the evolution of element stocks and fluxes under scenario of progressive warming in high latitudes becomes possible. It follows the increase of frozen peat thawing in western Siberia will increase the stocks of elements in surface waters by a factor of 3 to 10 whereas the increase of the thickness of active layer, the biomass and the primary productivity all over permafrost-affected zone will bring about a short-term increase of elements stocks in labile reservoir (plant litter) and riverine fluxes by a factor of 2. The change of the plant productivity and community composition under climate warming in central Siberia will be the most important factor of major and trace element fluxes increase (probably a factor of 2) from the soil to the river and, finally, to the Arctic Ocean. (c) 2012 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.

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Держатели документа:
[Pokrovsky, Oleg S.
Viers, Jerome
Dupre, Bernard
Audry, Stephane] Univ Toulouse, CNRS IRD OMP, Geosci Environm Toulouse, F-31400 Toulouse, France
[Chabaux, Francois] CNRS, EOST, UMR 7517, CGS, F-67084 Strasbourg, France
[Gaillardet, Jerome] Inst Phys Globe Strasbourg Paris, Equipe Geochim Cosmochim, F-75005 Paris, France
[Prokushkin, Anatoly S.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia
[Shirokova, Liudmila S.] Russian Acad Sci, Inst Ecol Problems N, Arkhangelsk, Russia
[Kirpotin, Sergey N.] Tomsk State Univ, Tomsk 634050, Russia
[Lapitsky, Sergey A.] Moscow MV Lomonosov State Univ, Geol Fac, Moscow, Russia
[Shevchenko, Vladimir P.] RAS, PP Shirshov Oceanol Inst, Moscow 117901, Russia

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Pokrovsky, O.S.; Viers, J...; Dupre, B...; Chabaux, F...; Gaillardet, J...; Audry, S...; Prokushkin, A.S.; Shirokova, L.S.; Kirpotin, S.N.; Lapitsky, S.A.; Shevchenko, V.P.

[Text] / S. M. GOROZHANKINA // SOVIET JOURNAL OF REMOTE SENSING. - 1993. - Vol. 10, Is. 5. - P887-898. - Cited References: 16 . - 12. - ISSN 0275-911XРУБ Geography + Geology + Remote Sensing + Imaging Science & Photographic Technology

Аннотация: The paper analyses the wetland cover of the plains using medium-resolution space photographs. A list of interpretational features, including systematic features (relating to the geography, the climate zone and the lithology and geomorphology) and direct features (morphological, phytocenotic) is given. On images, the morphology of peat bogs has universal diagnostic properties and may be used to detect edges on photographs. The structural and morphological map obtained by interpretation, serves as a basis for geographical extrapolation of key ground characteristics and various types of interpretable images of wetland.

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GOROZHANKINA, S.M.

/ V. Mavromatis [et al.] // Geochim. Cosmochim. Acta. - 2016. - Vol. 191. - P32-46, DOI 10.1016/j.gca.2016.07.003 . - ISSN 0016-7037
Аннотация: This work focuses on the behavior of the stable Mg and Si isotope compositions of the largest Arctic river, the Yenisey River and 28 of its major and minor tributaries during the spring flood period. Samples were collected along a 1500 km latitudinal profile covering a wide range of permafrost, lithology, and vegetation. Despite significant contrasts in the main physico-geographical, climate, and lithological parameters of the watersheds, the isotope composition of both dissolved Mg and Si was found to be only weakly influenced by the degree of the permafrost coverage, type of vegetation (forest vs. tundra), and lithology (granites, basalts, carbonates or terrigenous rocks). This observation is generally consistent with the lack of chemical uptake of Mg and Si by soil mineral formation and vegetation during the early spring. The radiogenic Sr isotope composition of the Yenisey and its tributaries varied within a narrow range (0.708 ? 87Sr/86Sr ? 0.711) reflecting the dominance of Phanerozoic rock weathering and/or atmospheric deposition on these compositions. The Mg and Si isotopic compositions of riverine samples reflect two main processes with distinct isotopic signatures. First, isotopically heavier Mg (?26Mg = ?1.0 ± 0.2‰) and isotopically lighter Si (?30Si = 1.0 ± 0.25‰) are added to the waters by river suspended matter dissolution and leaching from vegetation biomass/topsoil litter. Second, isotopically lighter Mg (?26Mg = ?1.5 to ?1.75‰) and isotopically heavier Si (?30Si = 1.75–2.0‰) are delivered to the Yenisey's tributaries from deep underground water feeding the rivers via taliks. This lighter Mg and heavier Si isotopic composition is interpreted to originate from Precambrian dolomite dissolution and aluminosilicate dissolution coupled with authigenic mineral precipitation, respectively, in deep underground water reservoirs. Taking account of the isotopic composition evolution over the course of the year established earlier on mono-lithological watersheds of the Yenisey basin, the average annual isotopic signatures of the Yenisey river arriving to the Arctic Ocean are estimated to be ?26Mg = ?1.58 ± 0.30‰ and ?30Si = +1.60 ± 0.25‰. As the Yenisey is the largest river feeding the Arctic Ocean and as it samples a large variety of environments and lithologies, these values may be reasonable estimates for the average Mg and Si isotopic composition of the dissolved riverine flux to the Arctic Ocean. © 2016 Elsevier Ltd

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Держатели документа:
Geosciences Environnement Toulouse (GET), CNRS, UMR 5563, Observatoire Midi-Pyrenees, 14 Av. E. Belin, Toulouse, France
Institute of Applied Geosciences, Graz University of Technology, Rechbauerstrasse 12, Graz, Austria
V.N. Sukachev Institute of Forest, SB RAS, Akademgorodok 50/28, Krasnoyarsk, Russian Federation
BIO-GEO-CLIM Laboratory, Tomsk State University, Tomsk, Russian Federation
Institute of Ecological Problems of the North, RAS, 23 Naber. Sev. Dviny, Arkhangelsk, Russian Federation
Earth Sciences, University College London, WC1E 6BT, United Kingdom

Доп.точки доступа:
Mavromatis, V.; Rinder, T.; Prokushkin, A. S.; Pokrovsky, O. S.; Korets, M. A.; Chmeleff, J.; Oelkers, E. H.

/ V. Mavromatis, A. S. Prokushkin, M. A. Korets [et al.] // Chem. Geol. - 2020. - Vol. 540. - Ст. 119547, DOI 10.1016/j.chemgeo.2020.119547 . - ISSN 0009-2541
Аннотация: Constraining the mechanisms controlling the riverine flux of major cations and their isotopes including that of Mg to the World Ocean is one of the challenges in Earth surface isotope geochemistry. In an attempt to identify the main factors affecting the Mg isotopic composition of large rivers including vegetation, climate and lithology of the watershed, we studied the largest, in terms of discharge, Siberian river, Yenisey, and 20 of its main tributaries, during spring flood, summer flow and winter. The working hypothesis was that the influence of bedrock composition is most pronounced in winter, when the soils are frozen and the rivers are fed by deep underground waters. Thus, we anticipated that the presence of permafrost will help to distinguish the impact of surface processes, linked to biological uptake and release, and deep soil/underground transport of Mg from mineral sources. In contrast to these expectations, no sizable differences in the Mg isotope composition of the river water (±0.1‰) for both the Yenisey tributaries and its main channel has been observed between the spring flood (May) and the winter (March) period. Those two periods are characterized by the differences of discharge and degree of lithological impact on element source in the river water. Regardless of the season, there was no straightforward control of lithology (relative abundance of carbonates, basalts, granites and sedimentary rocks) on ?26Mg in the main tributaries of the Yenisey river. Our findings suggest that the use of riverine Mg isotope signature for tracing weathering mechanisms and dominant lithological impact is not straightforward at the scale of large rivers whose watersheds present multiple lithologies, variable climatic conditions and vegetation types. © 2020 Elsevier B.V.

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Держатели документа:
Geosciences Environnement Toulouse (GET), CNRS, UMR 5563, Observatoire Midi-Pyrenees, 14 Av. E. Belin, Toulouse, 31400, France
V.N. Sukachev Institute of Forest, SB RAS, Akademgorodok 50/28, Krasnoyarsk, 660036, Russian Federation
BIO-GEO-CLIM Laboratory, Tomsk State University, Tomsk, Russian Federation
N. Laverov Federal Center for Arctic Research, IEPN, Russian Academy of Science, 23 Naber. Sev. Dviny, Arkhangelsk, Russian Federation

Доп.точки доступа:
Mavromatis, V.; Prokushkin, A. S.; Korets, M. A.; Chmeleff, J.; Mounic, S.; Pokrovsky, O. S.

/ V. Mavromatis, A. S. Prokushkin, M. A. Korets [et al.] // Chem. Geol. - 2020. - Vol. 540. - Ст. UNSP 119547, DOI 10.1016/j.chemgeo.2020.119547. - Cited References:65. - The study was supported by RFFI (RFBR) grant No 19-55-15002 and by the French national programmes INSU-LEFE and INSU-SYSTER. The editor, J. Gaillardet and four anonymous reviewers are thanked for their constructive comments on our manuscript. . - ISSN 0009-2541. - ISSN 1872-6836РУБ Geochemistry & Geophysics

Аннотация: Constraining the mechanisms controlling the riverine flux of major cations and their isotopes including that of Mg to the World Ocean is one of the challenges in Earth surface isotope geochemistry. In an attempt to identify the main factors affecting the Mg isotopic composition of large rivers including vegetation, climate and lithology of the watershed, we studied the largest, in terms of discharge, Siberian river, Yenisey, and 20 of its main tributaries, during spring flood, summer flow and winter. The working hypothesis was that the influence of bedrock composition is most pronounced in winter, when the soils are frozen and the rivers are fed by deep underground waters. Thus, we anticipated that the presence of permafrost will help to distinguish the impact of surface processes, linked to biological uptake and release, and deep soil/underground transport of Mg from mineral sources. In contrast to these expectations, no sizable differences in the Mg isotope composition of the river water (+/- 0.1%) for both the Yenisey tributaries and its main channel has been observed between the spring flood (May) and the winter (March) period. Those two periods are characterized by the differences of discharge and degree of lithological impact on element source in the river water. Regardless of the season, there was no straightforward control of lithology (relative abundance of carbonates, basalts, granites and sedimentary rocks) on delta Mg-26 in the main tributaries of the Yenisey river. Our findings suggest that the use of riverine Mg isotope signature for tracing weathering mechanisms and dominant lithological impact is not straightforward at the scale of large rivers whose watersheds present multiple lithologies, variable climatic conditions and vegetation types.

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Держатели документа:
Observ Midi Pyrenees, CNRS, GET, UMR 5563, 14 Av E Belin, F-31400 Toulouse, France.
SB RAS, VN Sukachev Inst Forest, Akademgorodok 50-28, Krasnoyarsk 660036, Russia.
Tomsk State Univ, BIO GEO CLIM Lab, Tomsk, Russia.
Russian Acad Sci, N Laverov Fed Ctr Arctic Res, IEPN, 23 Naber Sev Dviny, Arkhangelsk, Russia.

Доп.точки доступа:
Mavromatis, Vasileios; Prokushkin, Anatoly S.; Korets, Mikhail A.; Chmeleff, Jerome; Mounic, Stephanie; Pokrovsky, Oleg S.; RFFI (RFBR) [19-55-15002]; French national programmes INSU-LEFE; INSU-SYSTER

/ S. N. Vorobyev, Y. Kolesnichenko, M. A. Korets, O. S. Pokrovsky // Water. - 2021. - Vol. 13, Is. 15. - Ст. 2093, DOI 10.3390/w13152093 . - ISSN 2073-4441
Аннотация: Transport of carbon, major and trace elements by rivers in permafrost-affected regions is one of the key factors in circumpolar aquatic ecosystem response to climate warming and permafrost thaw. A snap-shot study of major and trace element concentration in the Lena River basin during the peak of spring flood revealed a specific group of solutes according to their spatial pattern across the river main stem and tributaries and allowed the establishment of a link to certain landscape parameters. We demonstrate a systematic decrease of labile major and trace anion, alkali and alkaline-earth metal concentration downstream of the main stem of the Lena River, linked to change in dominant rocks from carbonate to silicate, and a northward decreasing influence of the groundwater. In contrast, dissolved organic carbon (DOC) and a number of low-soluble elements exhibited an increase in concentration from the SW to the NE part of the river. We tentatively link this to an increase in soil organic carbon stock and silicate rocks in the Lena River watershed in this direction. Among all the landscape parameters, the proportion of sporadic permafrost on the watershed strongly influenced concentrations of soluble highly mobile elements (Cl, B, DIC, Li, Na, K, Mg, Ca, Sr, Mo, As and U). Another important factor of element concentration control in the Lena River tributaries was the coverage of the watershed by light (for B, Cl, Na, K, U) and deciduous (for Fe, Ni, Zn, Ge, Rb, Zr, La, Th) needle-leaf forest (pine and larch). Our results also suggest a DOC-enhanced transport of low-soluble trace elements in the NW part of the basin. This part of the basin is dominated by silicate rocks and continuous permafrost, as compared to the carbonate rock-dominated and groundwater-affected SW part of the Lena River basin. Overall, the impact of rock lithology and permafrost on major and trace solutes of the Lena River basin during the peak of spring flood was mostly detected at the scale of the main stem. Such an impact for tributaries was much less pronounced, because of the dominance of surface flow and lower hydrological connectivity with deep groundwater in the latter. Future changes in the river water chemistry linked to climate warming and permafrost thaw at the scale of the whole river basin are likely to stem from changes in the spatial pattern of dominant vegetation as well as the permafrost regime. We argue that comparable studies of large, permafrost-affected rivers during contrasting seasons, including winter baseflow, should allow efficient prediction of future changes in riverine ‘inorganic’ hydrochemistry induced by permafrost thaw. © 2021 by the authorsLicensee MDPI, Basel, Switzerland.

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Держатели документа:
BIO-GEO-CLIM Laboratory, Tomsk State University, 35 Lenina, Tomsk, 634050, Russian Federation
V.N. Sukachev Institute of Forest of the Siberian Branch of Russian Academy of Sciences—Separated Department of the KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Geosciences and Environment Toulouse, UMR 5563 CNRS, University of Toulouse, 14 Avenue Edouard Belin, Toulouse, 31400, France
N. Laverov Federal Center for Integrated Arctic Research, Russian Academy of Sciences, 23 Nab. Northern Dvina, Arkhangelsk, 163002, Russian Federation

Доп.точки доступа:
Vorobyev, S. N.; Kolesnichenko, Y.; Korets, M. A.; Pokrovsky, O. S.

/ S. N. Vorobyev, Y. Kolesnichenko, M. A. Korets, O. S. Pokrovsky // Water. - 2021. - Vol. 13, Is. 15. - Ст. 2093, DOI 10.3390/w13152093. - Cited References:75. - This research was funded by RSF, grant number 18-17-00238-P and by RFBR, grants No 19-55-15002, 20-05-00729_a. . - ISSN 2073-4441РУБ Environmental Sciences + Water Resources

Аннотация: Transport of carbon, major and trace elements by rivers in permafrost-affected regions is one of the key factors in circumpolar aquatic ecosystem response to climate warming and permafrost thaw. A snap-shot study of major and trace element concentration in the Lena River basin during the peak of spring flood revealed a specific group of solutes according to their spatial pattern across the river main stem and tributaries and allowed the establishment of a link to certain landscape parameters. We demonstrate a systematic decrease of labile major and trace anion, alkali and alkaline-earth metal concentration downstream of the main stem of the Lena River, linked to change in dominant rocks from carbonate to silicate, and a northward decreasing influence of the groundwater. In contrast, dissolved organic carbon (DOC) and a number of low-soluble elements exhibited an increase in concentration from the SW to the NE part of the river. We tentatively link this to an increase in soil organic carbon stock and silicate rocks in the Lena River watershed in this direction. Among all the landscape parameters, the proportion of sporadic permafrost on the watershed strongly influenced concentrations of soluble highly mobile elements (Cl, B, DIC, Li, Na, K, Mg, Ca, Sr, Mo, As and U). Another important factor of element concentration control in the Lena River tributaries was the coverage of the watershed by light (for B, Cl, Na, K, U) and deciduous (for Fe, Ni, Zn, Ge, Rb, Zr, La, Th) needle-leaf forest (pine and larch). Our results also suggest a DOC-enhanced transport of low-soluble trace elements in the NW part of the basin. This part of the basin is dominated by silicate rocks and continuous permafrost, as compared to the carbonate rock-dominated and groundwater-affected SW part of the Lena River basin. Overall, the impact of rock lithology and permafrost on major and trace solutes of the Lena River basin during the peak of spring flood was mostly detected at the scale of the main stem. Such an impact for tributaries was much less pronounced, because of the dominance of surface flow and lower hydrological connectivity with deep groundwater in the latter. Future changes in the river water chemistry linked to climate warming and permafrost thaw at the scale of the whole river basin are likely to stem from changes in the spatial pattern of dominant vegetation as well as the permafrost regime. We argue that comparable studies of large, permafrost-affected rivers during contrasting seasons, including winter baseflow, should allow efficient prediction of future changes in riverine 'inorganic' hydrochemistry induced by permafrost thaw.

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Держатели документа:
Tomsk State Univ, BIO GEO CLIM Lab, 35 Lenina, Tomsk 634050, Russia.
Russian Acad Sci, Dept KSC, SB RAS, VN Sukachev Inst Forest,Siberian Branch, Krasnoyarsk 660036, Russia.
Univ Toulouse, Geosci & Environm Toulouse, UMR 5563, CNRS, 14 Ave Edouard Belin, F-31400 Toulouse, France.
Russian Acad Sci, N Laverov Fed Ctr Integrated Arctic Res, 23 Nab Northern Dvina, Arkhangelsk 163002, Russia.

Доп.точки доступа:
Vorobyev, Sergey N.; Kolesnichenko, Yuri; Korets, Mikhail A.; Pokrovsky, Oleg S.; Pokrovsky, Oleg; RSFRussian Science Foundation (RSF) [18-17-00238-P]; RFBRRussian Foundation for Basic Research (RFBR) [19-55-15002, 20-05-00729_a]