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/vtls:000645268 0.5 ha is 727,700, with a total surface area of 5.97 million ha, yielding an average lake coverage of 5.69% of the territory. Small lakes (0.5–1.0 ha) constitute about one third of the total number of lakes in the permafrost-bearing zone of WSL, yet their surface area does not exceed 2.9% of the total area of lakes in WSL. The latitudinal pattern of lake number and surface coverage follows the local topography and dominant landscape zones. The role of thermokarst lakes in dissolved organic carbon (DOC) and most trace element storage in the territory of WSL is non-negligible compared to that of rivers. The annual lake storage across the WSL of DOC, Cd, Pb, Cr, and Al constitutes 16%, 34%, 37%, 57%, and 73%, respectively, of their annual delivery by WSL rivers to the Arctic Ocean from the same territory. However, given that the concentrations of DOC and metals in the smallest lakes (<0.5 ha) are much higher than those in the medium and large lakes, the contribution of small lakes to the overall carbon and metal budget may be comparable to, or greater than, their contribution to the water storage. As such, observations at high spatial resolution (<0.5 ha) are needed to constrain the reservoirs and the mobility of carbon and metals in aquatic systems. To upscale the DOC and metal storage in lakes of the whole subarctic, the remote sensing should be coupled with hydrochemical measurements in aquatic systems of boreal plains.]]> Wed 19 Dec 2018 14:12:33 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000895623 Wed 08 Jun 2022 13:43:00 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/koha:000996391 Tue 14 Feb 2023 15:56:34 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000996394 Tue 14 Feb 2023 15:49:40 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/koha:001008914 Thu 09 Nov 2023 09:55:56 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001067505 Thu 08 Feb 2024 10:56:19 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000925495 Mon 19 Dec 2022 15:45:40 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:000494611 Fri 14 Dec 2018 10:11:03 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000453489 Fri 14 Dec 2018 09:49:57 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000494804 Fri 14 Dec 2018 09:43:00 KRAT ]]>