https://vital.lib.tsu.ru/vital/access/manager/Index ${session.getAttribute("locale")} 5 https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000616152 Wed 29 Nov 2017 15:03:13 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000927118 Wed 25 Jan 2023 09:26:15 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001133263 Wed 24 Apr 2024 10:14:15 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000901829 Wed 19 Oct 2022 10:09:09 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000518079 Wed 05 Dec 2018 10:15:21 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000893571 Wed 04 May 2022 14:38:54 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000893572 99 % CO2, <1 % CH4), which is comparable with CO2 emission measured in the Kolyma, Yukon, and Mackenzie rivers and permafrost-affected rivers in western Siberia. The areal C emissions from lotic waters of the Lena watershed were quantified by taking into account the total area of permanent and seasonal water of the Lena basin (28 000 km2 ). Assuming 6 months of the year to be an open water period with no emission under ice, the annual C emission from the whole Lena basin is estimated as 8.3±2.5 TgCyr-1, which is comparable to the DOC and dissolved inorganic carbon (DIC) lateral export to the Arctic Ocean.]]> Wed 04 May 2022 14:38:52 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001017690 Tue 30 Jan 2024 10:45:13 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000615952 Tue 28 Nov 2017 10:28:01 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001015842 Tue 19 Dec 2023 10:04:38 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000653315 Tue 14 May 2019 09:38:15 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996386 Tue 14 Feb 2023 15:56:39 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996387 Tue 14 Feb 2023 15:56:35 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996395 Tue 14 Feb 2023 15:49:40 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000547893 Tue 13 Jun 2017 13:35:24 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000794662 Tue 09 Mar 2021 13:25:37 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000657607 300 to 40 cm), and permafrost coverage (sporadic, discontinuous and continuous). We analyzed CO2, CH4, dissolved carbon, and major and trace elements (TE) in 93 soil pit samples corresponding to several typical micro landscapes constituting the WSL territory (peat mounds, hollows, and permafrost subsidences and depressions).]]> Thu 13 Jun 2019 09:46:19 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001008913 99.5% C-CO2, <0.5% C-CH4) which is twice higher than the total dissolved C (organic and inorganic) riverine export flux during the same period. Applying a “substituting space for time” approach for northern and southern parts of the river basin, we suggest that the current riverine CO2 emission may increase 2 to 3 fold in the next decades due to on-going climate warming and permafrost thaw. When integrating the obtained results into global models of C and biogeochemical cycle in the Arctic and subarctic region, the use of the Taz River as a representative example of continental planes should help to estimate the consequences of frozen peatland thaw on CO2 cycle in the Arctic and subarctic regions.]]> Thu 09 Nov 2023 09:56:02 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000624644 season > watershed size. The effect of the latitude was minimal in spring for most TE but highly visible for Sr, Mo, Sb and U. The main factors controlling the shift of river feeding from surface and subsurface flow to deep underground flow in the permafrost-bearing zone were the depth of the active (unfrozen) seasonal layer and its position in organic or mineral horizons of the soil profile. In the permafrost-free zone, the relative role of carbonate mineral-bearing base rock feeding vs. bog water feeding determined the pattern of trace element concentration and fluxes in rivers of various size as a function of season. Comparison of obtained TE fluxes in WSL rivers with those of other subarctic rivers demonstrated reasonable agreement for most trace elements; the lithology of base rocks was the major factor controlling the magnitude of TE fluxes. The climate change in western Siberia and permafrost boundary migration will affect essentially the elements controlled by underground water feeding (DIC, alkaline-earth elements (Ca, Sr), oxyanions (Mo, Sb, As) and U). The thickening of the active layer may increase the export of trivalent and tetravalent hydrolysates in the form of organo-ferric colloids. Plant litter-originated divalent metals present as organic complexes may be retained via adsorption on mineral horizon. However, due to various counterbalanced processes controlling element source and sinks in plants – peat – mineral soil – river systems, the overall impact of the permafrost thaw on TE export from the land to the ocean may be smaller than that foreseen by merely active layer thickening and permafrost boundary shift.]]> Thu 03 May 2018 16:49:28 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001139591 Mon 27 May 2024 15:57:04 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000899881 Mon 26 Sep 2022 11:46:47 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000901388 Mon 17 Oct 2022 14:24:10 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000465282 Mon 17 Dec 2018 11:01:29 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000528604 summer>autumn>winter. The ice formation in October included several stages: first, surface layer freezing followed by crack (fissure) formation with unfrozen water from the deeper layers spreading over the ice surface. This water was subsequently frozen and formed layered ice rich in organic matter. As a result, the DOC and metal (Mn, Fe, Ni, Cu, Zn, As, Ba and Pb) concentrations were highest near the surface of the ice column (0 to 20 cm) and decreased by a factor of 2 towards the bottom. The main implications of discovered freeze-driven solute concentrations in thermokarst lake waters are enhanced colloidal coagulation and removal of dissolved organic matter and associated insoluble metals from the water column to the sediments. The measured distribution coefficients of a TE between amorphous organo-ferric coagulates and lake water (<0.45 μm) were similar to those reported earlier for Fe-rich colloids and low molecular weight (<1 kDa, or <1–2 nm) fractions of thermokarst lake waters, suggesting massive coprecipitation of TE with amorphous Fe oxyhydroxide stabilized by organic matter. Although the concentration of most elements was lowest in spring, this period of maximal water coverage of land created a significant reservoir of DOC and soluble metals in the water column that can be easily mobilized to the hydrological network. The highest DOC concentration observed in the smallest (<100m2) water bodies in spring suggests their strongly heterotrophic status and, therefore, a potentially elevated CO2 flux from the lake surface to the atmosphere.]]> Mon 10 Dec 2018 12:52:19 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000897211 Mon 04 Jul 2022 10:20:52 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000534516 Mon 01 Jul 2019 14:08:39 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000509144 Fri 29 Jun 2018 10:39:28 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000634060 Fri 19 Oct 2018 16:10:14 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000494804 Fri 14 Dec 2018 09:43:00 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001008787 Fri 03 Nov 2023 10:32:48 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001008660 Fri 03 Nov 2023 09:29:51 KRAT ]]>