High resolution multi-annual riverine fluxes of organic carbon, nutrient and trace element from the largest European Arctic river, Severnaya Dvina

Chupakov, Artem V.; Pokrovsky, Oleg S.; Moreva, Olga Y.; Shirokova, Liudmila S.; Neverova, Natalia; Chupakova, Anna A.; Котова, Е. И.; Vorobyeva, Taissia Y.

doi:10.1016/j.chemgeo.2020.119491

Cited by 46 publications

(39 citation statements)

References 92 publications

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“…Yet, this study was carried out during baseflow period (July to October) when the quality and quantity of the DOC in waters are most stable (Chupakov et al, 2020;Holmes et al, 2012;Manasypov et al, 2015;Neff et al, 2006;Olefeldt and Roulet, 2012;Tang et al, 2018). Our working hypothesis is that the BDOC decreases along the HC (with the preferential degradation of easily biodegradable C molecules) and that the amplitude of this decrease depends on landscape context and the DOM origin.…”

Section: Introductionmentioning

confidence: 99%

Dissolved organic matter biodegradation along a hydrological continuum in permafrost peatlands

Payandi-Rolland

Shirokova

Tesfa

et al. 2020

Science of The Total Environment

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Section: Introductionmentioning

confidence: 99%

Dissolved organic matter biodegradation along a hydrological continuum in permafrost peatlands

Payandi-Rolland

Shirokova

Tesfa

et al. 2020

Science of The Total Environment

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“…In contrast, in southern part of the basin, the groundwater contacting with carbonate rocks of the basement or the loess soils are enriched in HCO3 -which renders uranyl into soluble, non-colloidal carbonate complexes. Such a mechanism is fairly well known for other boreal regions which are impacted by carbonate rocks [62]. As a result, the proportion of colloidal form of UO2(VI) progressively decreases southward and becomes as low as 3 % in two most southern tributaries (Ket and Tom) which exhibit the highest DIC, Ca and the lowest DOC and Fe concentration.…”

Section: Riverine Transport Of Trace Element Occurs In the Form Of Organo-ferric Colloidsmentioning

confidence: 74%

Landscape, Soil, Lithology, Climate and Permafrost Control on Dissolved Carbon, Major and Trace Elements in the Ob River, Western Siberia

Kolesnichenko¹,

Kolesnichenko²,

Vorobyev³

et al. 2021

Preprint

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Assuming that climate warming in the WSL will lead to a northward shift of the forest and permafrost boundaries, a “substituting space for time” approach predicts an increase in concentration of DIC and labile major and trace elements and a decrease of the transport of DOC and low soluble trace metals in the form of colloids in the main stem of the Ob River. However, an unknown factor is the change in hydrochemistry of the largest southern tributary, the Irtysh River, which is impacted by permafrost-free steppe and forest-steppe zone. Overall, seasonally-resolved transect studies of large riverine systems of western Siberia are needed to assess the hydrochemical response of this environmentally-important territory to on-going climate change.

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“…Based on the bulk of information acquired by previous chemical and isotopic work on major and trace elements in boreal and permafrost-affected rivers [40][41][42][43][44][45][46][47], we hypothesize that, during spring flood, the impact of lithology (which is reflected via deep subsoil waters and groundwater feeding) will be quite low and the river water chemical composition will be dominated by surficial flow originating from water leaching of organic topsoil and vegetation litter. In order to test this hypothesis, we sampled the main stem of the Lena River and its tributaries at the peak of the spring flood and we analyzed dissolved (<0.45 µm) major and trace components of the river water.…”

Section: Introductionmentioning

confidence: 99%

Testing Landscape, Climate and Lithology Impact on Carbon, Major and Trace Elements of the Lena River and Its Tributaries during a Spring Flood Period

Vorobyev

Kolesnichenko

Korets

et al. 2021

Water

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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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High resolution multi-annual riverine fluxes of organic carbon, nutrient and trace element from the largest European Arctic river, Severnaya Dvina

Cited by 46 publications

References 92 publications

Dissolved organic matter biodegradation along a hydrological continuum in permafrost peatlands

Dissolved organic matter biodegradation along a hydrological continuum in permafrost peatlands

Landscape, Soil, Lithology, Climate and Permafrost Control on Dissolved Carbon, Major and Trace Elements in the Ob River, Western Siberia

Testing Landscape, Climate and Lithology Impact on Carbon, Major and Trace Elements of the Lena River and Its Tributaries during a Spring Flood Period

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