Multidisciplinary investigations in the marine environment of the inner Kongsfiord, Svalbard islands (September 2000 and 2001)

Aliani, Stefano; Bartholini, G.; Degl'innocenti, F.; Delfanti, Roberta; Galli, Cláudio; Lazzoni, E.; Lorenzelli, R.; Malaguti, Antonella; Meloni, Roberto; Papucci, C.; Salvi, Stefano; Zaborska, Agata

doi:10.1080/02757540410001655396

Cited by 15 publications

(7 citation statements)

References 11 publications

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“…0.34 kg m 23 in Svendsen et al 2002 and0.50 kg m 23 in Elverhøi et al 1980). However, our measured concentrations were higher than another recent study (maximum 0.1 kg m 23 near Kronebreen in Aliani et al 2004). Our actual sediment concentrations were probably much higher, however, as shown by our sediment trap records.…”

Section: Water Columncontrasting

confidence: 94%

“…Our annual sedimentation rates at the glacier front are a minimum of 4.05 Â 10 5 g m 22 a 21 with an inner basin average of 1.56 Â 10 5 g m 22 a 21 . These annual rates are an order of magnitude higher than those of other studies in inner Kongsfjorden: 1.80 Â 10 4 g m 22 a 21 measured near Ossian Sarsfjellet using 210 Pb ex dating of sediment cores (Aliani et al 2004), 2.0 Â 10 4 g m 22 a 21 measured for the Kongsbreen 'glacier front' using 210 Pb ex dating of sediment cores (Svendsen et al 2002) and 5.6 Â 10 4 g m 22 a 21 measured in sediment traps at 15 m depth, 300 m from Kongsbreen (from daily rates in Zajaczkowski 2002 multiplied by a 60-day melt season). Higher rates of this study may indicate a higher relative meltwater and sediment flux of the Kronebreen -Kongsvegen glacier complex compared to the other nearby glaciers measured in other studies.…”

Section: Local and Global Sediment Flux Perspectivesmentioning

confidence: 54%

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Modern glacimarine processes and potential future behaviour of Kronebreen and Kongsvegen polythermal tidewater glaciers, Kongsfjorden, Svalbard

Trusel

Powell

Cumpston

et al. 2010

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Glacimarine dynamics and associated sedimentary processes are closely tied to glacial regime and reflect dominant climatic conditions. Quantitative measurements for subpolar glaciers, such as sediment yield, are limited especially near glacial termini where most sediment accumulates. Here we characterize the modern glacimarine environment, quantify sediment flux and yield, document landform genesis and hypothesize potential future behaviour of Kronebreen and Kongsvegen glaciers in inner Kongsfjorden, Svalbard. A minimum of 6.74 Â 10 3 g m 22 d 21 (at least 300 mm a 21 ) of glacimarine sediment is building a grounding-line fan via submarine stream discharge from Kronebreen. Average daily sediment flux to the ice-contact basin is recorded to be 2.6 Â 10 3 g m 22 d 21 or an average annual flux of 1.56 Â 10 5 g m 22 a 21 . We measure an average annual ice-contact sediment yield of 1.20 Â 10 4 tonnes km 22 a 21 associated with the rapid genesis of grounding-line landforms. With forecasted warming we expect meltwater volumes and sediment flux to increase. Grounding-line deposits may aggrade above water, tending to stabilize the terminus at least initially if the sediment is sufficient to counteract total terminus ablation. This would hold until either the glaciers next surge or climatic warming ablates the glaciers through surface melting.

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Section: Water Columncontrasting

confidence: 94%

Section: Local and Global Sediment Flux Perspectivesmentioning

confidence: 54%

Modern glacimarine processes and potential future behaviour of Kronebreen and Kongsvegen polythermal tidewater glaciers, Kongsfjorden, Svalbard

Trusel

Powell

Cumpston

et al. 2010

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“…To appreciate this, the distribution of salinity needs to be mapped across the surface of the fjord. Such a study was carried out in the inner part of Kongsfjorden where the outflow was colder and fresher with a cross-fjord temperature difference of surface temperature of 2 8C and a salinity difference of 1 (Aliani et al 2004). However, even at 20 m depth, these gradients were much reduced highlighting that the flow was confined to a well-delineated surface layer.…”

Section: Rotationmentioning

confidence: 99%

Arctic fjords: a review of the oceanographic environment and dominant physical processes

Cottier

Nilsen²,

Skogseth³

et al. 2010

169

168

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Fjords have long been recognized for their value as sites of sediment deposition, recording past climatic conditions. Recently, Arctic fjords have been recognized as the critical gateway through which oceanic waters can impact on the stability of glaciers. Arctic fjords are also used as idealized locations to study ice-influenced physical, biological and geochemical processes. In all cases a clear understanding of the physical oceanographic environment is required to interpret and predict related impacts and linkages. In this review we consider the characteristic elements of Arctic fjords and the important dynamical processes. We show how the intense seasonality of these regions is reflected in the varying stratification of the fjords. In particular, we show that sea ice has a central role in terms of the fjord salinity which ultimately influences the exchange with oceanic waters. When the fjord is ice free, wind forcing from the intense down-fjord katabatic winds gives rise to rapidly changing cross-fjord gradients, upwelling and strong surface circulations. The stratification and dimensions of Arctic fjords mean that they are often classed as 'broad' fjords where rotational effects are important in their circulation. We refer to the link between the physical oceanographic conditions and the related depositional records throughout.

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“…On the contrary, with alongshore winds the free surface at the mouth of the fjord drives either a baroclinic outflow (i.e., toward the fjord mouth) of waters or an inflow (i.e. toward the glacier front) (Stefano Aliani et al, 2016;S. Aliani et al, 2004).…”

Section: Sample Site and Oceanographymentioning

confidence: 99%

“…In summer and in a relatively ice-free environment, the general circulation of the water masses inside the fjord is anticlockwise with warm and salty mainly TAW and less AW entering from the outer fjord, reaching the tidewater glaciers Kronebreen-Kongsvegen. Then they move cooler and less salty north-westward along the coast east of the Lovénøyane shoals and exit in the outer fjord between the Blømstrand island and the northern coast, constrained by topography, with velocities less than 8-10 cm/s (Aliani et al, 2016;Svendsen et al, 2002;Aliani et al, 2004). Nutrient availability is one of the most direct mechanisms by which glacial discharge affects primary productivity of phytoplankton in polar regions (Hodal et al, 2012).…”

Section: Sample Site and Oceanographymentioning

confidence: 99%

Nutrient Analysis in Arctic Waters Using a Portable Sensing Platform

et al. 2021

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A portable sensing platform for the detection of nutrients (PO43−, NO2−, NO3−) in natural waters has been realized through the use of rapid prototyping techniques, colorimetric chemistries, electronics, and LED-based optical detection. The sensing platform is modular in design incorporating interchangeable optical detection units, with a component cost per unit of ca. €300, and small form factor (20 cm × 6 cm x 3.5 cm). Laboratory testing and validation of the platform was performed prior to deployment at the CNR Dirigibile Italia Arctic Research Station, Ny-Aselund (79°N, 12°E). Results obtained showed excellent linear response, with a limit of detection of 0.05 μM (NO2−, NO3−), and 0.03 μM (PO43−). On the June 22, 2016 a field campaign took place within Kongsfjorden, Ny-Aselund (78.5–79°N, 11.6–12.6°E), during which 55 water samples were acquired using 10 L Niskin bottles on board the MS Teisten research vessel. 23 hydrological casts were also performed using a Seabird 19plus V2 SeaCAT Profiler CTD probe with turbidity and dissolved oxygen sensors. Water samples were subsequently analyzed for PO43−, NO2−, NO3− at the CNR Dirigibile Italia Arctic Research Station Laboratory using the adaptive sensing platform. Nutrient concentrations were compared to hydrological data to assess the processes that influence the nutrient concentrations within the Fjord. This research highlights the potential use of the adaptive sensing platform in remote locations as a stand-alone platform and/or for the validation of deployable environmental sensor networks.

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Multidisciplinary investigations in the marine environment of the inner Kongsfiord, Svalbard islands (September 2000 and 2001)

Cited by 15 publications

References 11 publications

Modern glacimarine processes and potential future behaviour of Kronebreen and Kongsvegen polythermal tidewater glaciers, Kongsfjorden, Svalbard

Modern glacimarine processes and potential future behaviour of Kronebreen and Kongsvegen polythermal tidewater glaciers, Kongsfjorden, Svalbard

Arctic fjords: a review of the oceanographic environment and dominant physical processes

Nutrient Analysis in Arctic Waters Using a Portable Sensing Platform

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