Hydrochemical regime components of Lena water

Kuzmin, Michael I.; Тарасова, Е. Н.; Бычинский, В. А.; Karabanov, E. B.; Mamontov, А. А.; Mamontova, Е. А.

doi:10.1134/s0097807809040058

Cited by 6 publications

(11 citation statements)

References 9 publications

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“…DOC concentrations in the main channel of the Lena River (590–1300 μM) were similar to previous observations in the Lena River (170–1230 μM) and comparable to the range in other Arctic Rivers [ Amon et al ., ; Cauwet and Sidorov , ; Cooper et al ., ; Kuzmin et al ., ; Lara et al ., ; Le Fouest et al ., ; Lobbes et al ., ]. However, DOC data from the tributaries had an even larger range (Figure a).…”

Section: Discussionmentioning

confidence: 98%

“…However, DOC data from the tributaries had an even larger range (Figure a). The range in POC concentrations was larger (6–640 μM) compared to other studies in the Lena River (2.5–430 μM), but similar to the range in other Arctic Rivers [ Cauwet and Sidorov , ; Guo et al ., ; Kuzmin et al ., ; Le Fouest et al ., ; Lobbes et al ., ; McClelland et al ., ]. The large range in POC was primarily due to the flood event in the Upper Lena in 2012.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies of OC in the Lena River have mainly focused on the main channel of the river and the delta [Amon et al, 2012;Cooper et al, 2008;Dudarev et al, 2006;Holmes et al, 2012;Karlsson, 2015;Lara et al, 1998;Le Fouest et al, 2013;Lobbes et al, 2000;Pipko et al, 2010;Raymond et al, 2007;Semiletov et al, 2011]. OC data from tributaries of the Lena River are scarce and include only the largest subbasins and then only for a few occasions [Kuzmin et al, 2009;Lara et al, 1998]. Spatially defined OC fluxes from the terrestrial environment to the Lena River are therefore not well understood, limiting our ability to adequately predict future changes in OC concentrations and fluxes to the Arctic Ocean.…”

Section: Introductionmentioning

confidence: 99%

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Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia

et al. 2017

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Global warming in permafrost areas is expected to change fluxes of riverine organic carbon (OC) to the Arctic Ocean. Here OC concentrations, stable carbon isotope signatures (δ13C), and carbon‐nitrogen ratios (C/N) are presented from 22 sampling stations in the Lena River and 40 of its tributaries. Sampling was conducted during two expeditions: the first in July 2012 in the south and southeastern region and the second in June 2013 in the northern region of the Lena basin. The data showed significant spatial differences in concentrations and major sources of OC. Mean subcatchment slopes were correlated with OC concentrations, implying that mountainous areas in general had lower concentrations than lowland areas. δ13C and C/N data from tributaries originating in mountainous areas indicated that both dissolved and particulate OC (DOC and POC) were mainly derived from soil organic matter (SOM). In contrast, tributaries originating in lowland areas had larger contributions from fresh vegetation to DOC, while aquatically produced OC was the major source of POC. We suggest that these differences in dominant sources indicated differences in dominant flow pathways. Tributaries with larger influence of fresh vegetation probably had surficial flow pathways, while tributaries with more SOM influence had deeper water flow pathways. Thus, the future export of OC to the Arctic Ocean will likely be controlled by changes in spatial patterns in hydroclimatology and the depth of the active layers influencing the dominant water flow pathways in Arctic river basins.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial variation in concentration and sources of organic carbon in the Lena River, Siberia

et al. 2017

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“…For the Lena River main stem, there are several occasional measurements of the major river solutes in the middle course obtained during summer baseflow. During spring flood in June, we observed generally lower concentrations of Si (less than a factor of 2) compared to July-August period [27], and also lower (less than x 2) concentrations of Ca, Mg, Sr, SO4 but comparable concentrations of Na and Cl to those reported in the Yakutks-Kyusur region [29]. The Kyusur gauging state average Ba concentration 18 µg L -1 , [57]) is comparable with our data for the Lena main stem in the Yakutsk region.…”

Section: Comparison With Other Data On Element Concentration In the Lena River And Its Tributariesmentioning

confidence: 50%

“…The Lena River of Central and Eastern Siberia is located almost entirely within a permafrost zone, exhibits the highest seasonal variation in water flow, and demonstrates annual discharge increase over past decades [7][8][9][10][11][12][13][14][15]. Among all the solutes transported by the Lena River water, organic carbon received most attention [16][17][18][19][20][21][22] although some information on general hydrochemistry is also available [23][24][25][26][27][28][29][30]. Most recently, novel isotopic approaches were applied for nutrients [31] and trace metals such as Li [32] and Fe [33].…”

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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

Vorobyev¹,

Kolesnichenko²,

Korets³

et al. 2021

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Transport of carbon, major and trace element by rivers in permafrost-affected regions is one of the key factor of circumpolar aquatic ecosystem response to climate warming and permafrost thaw. While seasonal and annual export fluxes (yields) of carbon (C) and inorganic solutes are fairly well known for all large Arctic rivers, spatial variations in elementary concentration along the river length and among its tributaries remain poorly understood. Moreover, the landscape factors controlling riverine element concentration in permafrost-affected regions are still poorly constrained. This is especially true for the largest river of Eastern Siberia, the Lena River, which drains through continuous permafrost zones with highly variable lithology and vegetation. Here we present the results of C, major and trace element measurements over a 2600-km transect of the Lena River main stem (upper and middle reaches) including its 30 tributaries, conducted at the peak of the spring flood. There were two main group of solutes in the main stem depending on their spatial pattern: i) elements that decreased their concentrations downstream, from SW to NE (Cl, SO4, DIC, Li, B, Na, Mg, K, Ca, As, Sr, Mo, Sb, Ba and U), which probably reflected a decrease in the proportion of carbonate rocks in the watershed and the degree of groundwater feeding, and ii) elements that increased their concentrations downstream (Al, Ti, Cr, Fe, Ga, Rb, Y, Zr, Nb, Cs, REEs, Hf and Th), which was tentatively linked to an increase in organic C stock in soils, larch forest coverage and enhanced mobilization of lithogenic elements from silicate soil minerals. Based on landscape parameters of Lena tributaries, we tested the impact of major environmental factors on major and trace element spatial pattern. Among all the variables, the proportion of sporadic permafrost on the watershed strongly controlled 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 watershed by light (B, Cl, Na, K, U) and deciduous (Fe, Ni, Zn, Ge, Rb, Zr, La, Th) needle-leaf forest (pine and larch). The latter, however, could also reflect the 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 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 be linked to changes in spatial pattern of dominant vegetation, rather than to the permafrost regime. We argue that comparable studies of large, permafrost-impacted rivers during most contrasting seasons, including winter baseflow, should allow efficient prediction of future changes in riverine ‘inorganic’ hydrochemistry induced by permafrost thaw.

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