https://vital.lib.tsu.ru/vital/access/manager/Index en-us 5 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:001133267 50% of the annual export of DOC and generally insoluble trace metals. However, the winter baseflow provided sizable proportions of mobile elements such as DIC, major anions, cations, alkaline-earth elements, trace oxyanions and uranium. The size distribution of riverine solutes demonstrated 20–50% of DOC in the colloidal (3 kDa – 0.45 μm) form, dominance of low molecular forms (< 3 kDa) of soluble elements (alkali, alkaline earths, anions and neutral molecules) and essentially colloidal status of divalent metals (Cu, Zn, Cd, Pb, Ni), trivalent and tetravalent hydrolysates and U (from 30 to 93%). Seasonal variations in colloidal fractions of riverine solutes were consistent with the main mechanisms of element mobilization from the watershed to the Pechora River, as reflected in the 3 groups of elements according to their concentration – discharge relationship. Based on the present study and results of other mid-sized Arctic rivers (Severnaya Dvina, Taz), we demonstrate that mean discharges and solute concentrations in August can be used to adequately (± 20%) approximate mean annual values, hence allowing annual flux assessment via single month sampling campaign. A comparison of contemporary yields of Ca, Mg, Cl, SO4, DIC and DOC against historical data for the Pechora River basin demonstrated reasonable agreement within the inter-annual variations that is consistent with long-term data series on other Arctic rivers.]]> Wed 24 Apr 2024 10:00:15 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000457085 Wed 13 Sep 2017 16:10:10 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:000482137 Wed 06 Sep 2017 10:48:05 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001008299 Tue 31 Oct 2023 10:47:46 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000629724 Tue 26 Jun 2018 10:14:27 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000628662 Tue 19 Jun 2018 16:03:09 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/koha:000996394 Tue 14 Feb 2023 15:49:40 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000453745 Tue 12 Sep 2017 13:34:02 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:000723636 Tue 08 Sep 2020 11:02:21 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000895289 Tue 07 Jun 2022 10:50:27 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000529147 Tue 04 Dec 2018 09:37:41 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001133433 Thu 25 Apr 2024 09:48:13 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000623378 Thu 19 Apr 2018 16:56:41 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001009378 Thu 16 Nov 2023 11:51:51 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000895622 Thu 09 Jun 2022 23:41:56 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:001132477 Thu 04 Apr 2024 13:15:31 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:000894992 Thu 02 Jun 2022 10:40:31 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000488672 Sat 03 Nov 2018 10:00:52 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000482104 Mon 29 Oct 2018 17:00:31 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000499187 Mon 26 Sep 2022 10:50:45 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:000790990 Mon 11 Jan 2021 11:34:31 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000499781 Mon 04 Sep 2017 10:02:06 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:000661299 Fri 30 Aug 2019 09:43:11 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000660583 Fri 23 Aug 2019 09:57:09 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001001436 Fri 19 May 2023 14:40:59 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:000490055 Fri 14 Dec 2018 09:42:50 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000503022 Fri 11 Jun 2021 14:14:35 KRAT ]]> https://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000442378 Fri 09 Jun 2017 16:22:12 KRAT ]]>