Sediment transport to the Arctic Ocean and adjoining cold oceans*

Hasholt, Bent; Bobrovitskaya, Nelly N.; Bogen, Jim; McNamara, J. P.; Mernild, Sebastian H.; Milburn, David; Walling, Desmond E.

doi:10.2166/nh.2006.023

Cited by 49 publications

(36 citation statements)

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“…Peterson et al 2002, Syvitski 2002, Gordeev 2006, Hasholt et al 2006, Holland et al 2007. during the 21st century, Lewis and Lamoureux (2010) predicted increases in runoff in a small catchment in the Canadian Arctic Archipelago, resulting in greater discharge variability.…”

Section: Discussionmentioning

confidence: 99%

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Franczak

Kociuba

Gajek

2016

Quaestiones Geographicae

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River runoff variability in the Scott River catchment in the summer seasons 2012 and 2013 has been presented in comparison to the multiannual river runoff in 1986-2009. Both in particular seasons and in the analysed multiannual, high variability of discharge rate was recorded. In the research periods 2012-2013, a total of 11 952 water stages and 20 flow rates were measured in the analysed cross-section for the determination of 83 daylong discharges. The mean multiannual discharge of the Scott River amounted to 0.96 m 3 ·s -1 . The value corresponds to a specific runoff of 94.6 dm 3 ·s -1 ·km 2 , and the runoff layer 937 mm. The maximum values of daily discharge amounted to 5.07 m 3 ·s -1 , and the minimum values to 0.002 m 3 ·s -1 . The highest runoff occurs in the second and third decade of July, and in the first and second decade of August. The regime of the river is determined by a group of factors, and particularly meteorological conditions affecting the intensity of ablation, and consequently river runoff volume. We found a significant correlation (0.60 in 2012 and 0.67 in 2013) between the air temperature and the Scott River discharge related to the Scott Glacier ice melt.

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Section: Discussionmentioning

confidence: 99%

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Franczak

Kociuba

Gajek

2016

Quaestiones Geographicae

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“…Sediment originating from icebergs, while contributing to total sediment export, complicates the retrieval of plumes in this study because those sediments do not originate from terrestrial runoff sources. However, icebergs release sediment slowly as they melt, transporting sediment large distances downstream of the glacier front (Syvitski et al, 1996;Azetsu-Scott and Syvitski, 1999;Hasholt et al, 2006). Therefore, in fjords with moderate iceberg interference, any detection of a surface sediment plume (limited by fjord spatial sampling ∼15-20 km from the glacier front) likely reflects input of ice sheet meltwater runoff rather than sediment from icebergs.…”

Section: Discussionmentioning

confidence: 99%

Hydrologic controls on coastal suspended sediment plumes around the Greenland Ice Sheet

et al. 2012

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Abstract. Rising sea levels and increased surface melting of the Greenland ice sheet have heightened the need for direct observations of meltwater release from the ice edge to ocean. Buoyant sediment plumes that develop in fjords downstream of outlet glaciers are controlled by numerous factors, including meltwater runoff. Here, Moderate Resolution Imaging Spectroradiometer (MODIS) satellite imagery is used to average surface suspended sediment concentration (SSC) in fjords around ∼80 % of Greenland from 2000-2009. Spatial and temporal patterns in SSC are compared with positivedegree-days (PDD), a proxy for surface melting, from the Polar MM5 regional climate model. Over this decade significant geographic covariance occurred between ice sheet PDD and fjord SSC, with outlet type (land-vs. marine-terminating glaciers) also important. In general, high SSC is associated with high PDD and/or a high proportion of land-terminating glaciers. Unlike previous site-specific studies of the Watson River plume at Kangerlussuaq, temporal covariance is low, suggesting that plume dimensions best capture interannual runoff dynamics whereas SSC allows assessment of meltwater signals across much broader fjord environments around the ice sheet. Remote sensing of both plume characteristics thus offers a viable approach for observing spatial and temporal patterns of meltwater release from the Greenland ice sheet to the global ocean.

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“…Following the inter-annual variability of the river flow, the annual suspended sediment load (SSL) varies from 16.6 to 26.2 mln t, as measured at Kusur GS (Korotaev, 2012;Holmes et al, 2002;Hasholt et al, 2005). The vast majority of SSL passes by the Kusur cross-section in early summer when snowmelt events provide around 85 % of the total water discharge.…”

Section: Discussionmentioning

confidence: 99%

The water temperature characteristics of the Lena River at basin outlet in the summer period

Fofonova

Zhilyaev

Krayneva

et al. 2016

Preprint

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Abstract. The water temperature characteristics of the Lena River at basin outlet during the summer season (JuneSeptember) are considered. The analysis is based on a long-term data series covering the period from the beginning of observation (1936) to the present time (2012) at Kusur (Kyusyur) gauging station and complementary data at several stations 15 downstream and one station upstream. These additional data are rarely used, but their analysis is important for understanding processes in the basin outlet area. The differences between the stream surface temperatures at Kusur station and 200 km downstream to the north at Habarova (Khabarova) station have almost always been an anomalously large and negative for the considered period since the beginning of observation during open water season from July to September. The description of this difference and its analysis are presented. To sort the problem out, we consider the observational data in terms of the 20 hydrology and morphology of the Lena River delta and main channel area and apply statistical and deterministic modelling approaches. The inability of water temperature observational data at Kusur station to represent the mean cross-sectional temperature is addressed. The analysis of the water temperature trends at the Kusur and Habarova stations is also presented.

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Sediment transport to the Arctic Ocean and adjoining cold oceans*

Cited by 49 publications

References 0 publications

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Runoff Variability in the Scott River (SW Spitsbergen) in Summer Seasons 2012–2013 in Comparison with the Period 1986–2009

Hydrologic controls on coastal suspended sediment plumes around the Greenland Ice Sheet

The water temperature characteristics of the Lena River at basin outlet in the summer period

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