The hydrochemistry of Bayelva, a high Arctic proglacial stream in Svalbard

Hodson, Andy; Tranter, Martyn; Gurnell, Angela M.; Clark, M. F.; Hagen, Jon Ove

doi:10.1016/s0022-1694(01)00543-1

Cited by 82 publications

(119 citation statements)

References 49 publications

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“…Instead, the relative constancy in the chemical concentrations and through the summer has been noted previously (Pecher, 1994;Hodson et al 2002;Stutter & Billett, 2003). Weathering of feldspars by reaction with dissolved CO 2 is assumed to play only a minor role in production of HCO 3 -in this catchment, because the concentrations of K and Na, major components of feldspar, were essentially unchanged from snow pack values.…”

Section: General Chemistrymentioning

confidence: 65%

Chemical and isotopic characteristics of weathering and nitrogen release in non-glacial drainage waters on Arctic tundra

Tye

Heaton

2007

Geochimica et Cosmochimica Acta

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Soil-water interactions in coastal tundra soils are a potential source of nutrients for surrounding fjordal and coastal ecosystems. Changes in water chemistry and stable isotope composition from 3 streams in west Spitsbergen were examined to assess the sources and losses of nitrogen, sulfur and carbon in thin organic tundra soils overlying sediments. Studies were undertaken from snowmelt (mid June) through to the end of the summer (

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Section: General Chemistrymentioning

confidence: 65%

Chemical and isotopic characteristics of weathering and nitrogen release in non-glacial drainage waters on Arctic tundra

Tye

Heaton

2007

Geochimica et Cosmochimica Acta

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“…Details are given in Hodson et al (2000Hodson et al ( , 2002). Briefly, Midre Love´nbreen and Austre Brøggerbreen occupy catchments that are 10 and 32 km 2 respectively and both have mass balance records that demonstrate significant declines since the records began in the late 1960s (Hagen and Liestøl 1990;Kohler, unpublished data).…”

Section: The Field Sitesmentioning

confidence: 99%

The High Arctic glacial ecosystem: new insights from nutrient budgets

et al. 2005

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Abstract. This paper describes detailed budgets of water, Cl ) , dissolved Si and both inorganic and organic forms of nitrogen and phosphorus for two small glacier basins in Arctic Svalbard (Midre Love´nbreen and AustreBrøggerbreen). Rates of nutrient deposition are modest, dominated by inorganic nitrogen and episodically enhanced by extreme events. Hence deposition rates are also variable, ranging from 20 to 72 kg NO 3 -N km )2 a )1 and 10-37 kg NH 4 -N km )2 a )1 over just two consecutive years. Deposition of dissolved organic and particulate forms of nitrogen (DONand PN respectively) also appears significant and therefore requires further investigation (3-8 kg DON-N km )2 and 7-26 kg PN-N km )2 during winter -no summer data are available). Evidence for microbially mediated nutrient cycling within the glacial system is clear in the nutrient budgets, as is the release of large phosphorus, Si and organic/particulate nitrogen fluxes by subglacial erosion. The latter is entirely dependent upon the presence of subglacial drainage, promoting silicate mineral dissolution and the erosion of largely unweathered apatite. The large DON and PN fluxes are surprising and may relate to young organic nitrogen associated with microbial life within the glaciers. This is because wide spread assimilation of NH 4 + and perhaps even nitrification occurs on the glacier surface, most likely within abundant cryoconite holes. Further microbial activity also occurs at the glacier bed, where denitrification and sulphate reduction is now known to take place. Thus a two component 'glacial ecosystem' is proposed that is highly sensitive to climate change.

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“…During large floods, particularly ablation-precipitation events, total bedload flux was from 59% to 77% [31,34]. The effect of weather and extreme events on the modern development of the relief of the valley floor and channel was also repeatedly emphasised for proglacial rivers [7][8][9]13,17,20,[22][23][24][25]38,[63][64][65][66].…”

Section: Discussionmentioning

confidence: 99%

“…The literature also frequently emphasises meteorological conditions on the intensity of fluvial processes in the polar zone [15][16][17][18][19][20]. This results in high variability of erosion and denudation indices The dominant alimentation source of the Scott River is ablation of the Scott Glacier (90%).…”

Section: Introductionmentioning

confidence: 99%

Effect of Meteorological Patterns on the Intensity of Streambank Erosion in a Proglacial Gravel-Bed River (Spitsbergen)

Kociuba

Janicki

2018

Water

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Lower parts of proglacial rivers are commonly assumed to be characterised by a multiannual aggradation trend, and streambank erosion is considered to occur rarely and locally. In the years 2009-2013, detailed measurements of channel processes were performed in the Scott River (SW Spitsbergen). More than 60% of its surface area (10 km 2 ) occupies non-glaciated valleys. Since the end of the Little Ice Age, the Scott Glacier has been subject to intensive retreat, resulting in the expansion of the terminoglacial and paraglacial zones. In this area, the Scott River develops an alluvial valley with a proglacial river, which has led to a comparatively low rate of fluvial transport, dominance of suspension over bedload, and the occurrence of various channel patterns. Measurements, performed in the lower course of the valley in two fixed cross-sections of the Scott River channel, document variable annual tendencies with a prevalence of scour over deposition processes in the channel bottom. The balance of scour and fill also differs in particular measurement cross-sections and during the summer season. The maximum erosion indices (1.7 m 2 ) were related to single periods of floods with snow-glacier melt and rainfall origin. The contribution of streambank erosion was usually lower than that of deep erosion both in the annual cycle and during extreme events. The channel-widening index also suggests variable annual (from −1 m to +1 m) and inter-annual tendencies. During a three-day flood from August 2013, in a measurement profile at the mouth of the river, the NNW bank was laterally shifted by as much as 3 m. Annual and inter-seasonal indices of total channel erosion, however, show that changes in the channel-bottom morphology are equalised relatively fast, and in terms of balance the changes usually do not exceed 0.5% of a cross section's area.

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The hydrochemistry of Bayelva, a high Arctic proglacial stream in Svalbard

Cited by 82 publications

References 49 publications

Chemical and isotopic characteristics of weathering and nitrogen release in non-glacial drainage waters on Arctic tundra

Chemical and isotopic characteristics of weathering and nitrogen release in non-glacial drainage waters on Arctic tundra

The High Arctic glacial ecosystem: new insights from nutrient budgets

Effect of Meteorological Patterns on the Intensity of Streambank Erosion in a Proglacial Gravel-Bed River (Spitsbergen)

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