Glacier–plume or glacier–fjord circulation models? A 2-D comparison for Hansbreen–Hansbukta system, Svalbard

Andrés, Eva De; Otero, Jaime; Navarro, Francisco; Walczowski, Waldemar

doi:10.1017/jog.2021.27

Cited by 8 publications

(4 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Overall, these in situ ice flow velocity datasets can be used for tuning numerical models of glacier dynamics, e.g. modelling of flow of a grounded calving glacier (Vieli et al, 2000), developing glacier-plume and glacier-fjord circulation coupled models to simulate a glacier-ocean system (De Andrés et al, 2021), numerical simulation of the ice flow velocity in the future (e.g. Ai et al, 2019a), and changes of strain rate between neighbouring stakes (Ai et al, 2019b).…”

Section: Discussionmentioning

confidence: 99%

High temporal resolution records of the velocity of Hansbreen, a tidewater glacier in Svalbard

Błaszczyk,

Luks,

Pętlicki

et al. 2024

Earth Syst. Sci. Data

View full text Add to dashboard Cite

Abstract. Monitoring changes in glacial dynamics is essential for understanding the environmental response to accelerated climate warming in the Arctic. However, geodetic surveys in polar regions continue to present considerable challenges because of the harsh environmental conditions and the polar night. This study records a 14-year-long time series (2006–2019) of global navigation satellite system (GNSS) surveys of the positions of 16 ablation stakes distributed across Hansbreen, a tidewater glacier in southern Svalbard. The measurements were conducted with an exceptionally high temporal resolution, from about 1 week to about 1 month, and covering altitudes ranging from 20 to 490 m a.s.l. The position of one stake was surveyed every day. The primary data products consist of the stake coordinates and velocities. Time series of annual and seasonal velocities are also provided. This dataset may be a subject of further studies of glacier dynamics in relation to the long-term and seasonal impact of climate change on ice flow in the region. It also offers unique material for tuning numerical models of glacier dynamics and for validating satellite-derived products such as velocity and digital elevation models. The dataset described here has been made publicly available through the Zenodo repository: https://doi.org/10.5281/zenodo.8289380 (Błaszczyk et al., 2023).

show abstract

Section: Discussionmentioning

confidence: 99%

High temporal resolution records of the velocity of Hansbreen, a tidewater glacier in Svalbard

Błaszczyk,

Luks,

Pętlicki

et al. 2024

Earth Syst. Sci. Data

View full text Add to dashboard Cite

show abstract

“…Our result is in accordance with the finding of O’Leary and Christoffersen (2013) and De Andrés et al. (2018, 2021) that submarine melting might be a relevant driver of frontal retreat.…”

Section: Discussionmentioning

confidence: 99%

The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020

et al. 2023

Self Cite

View full text Add to dashboard Cite

Many Arctic marine‐terminating glaciers have undergone rapid retreats in recent decades. Seasonal and year‐to‐year variations in terminus position act on all tidewater glaciers, but the key controls on those changes vary from region to region. Here, we examined seasonal and decadal changes in termini positions of seven tidewater glaciers in the inner part of Hornsund, the southernmost fjord of Spitsbergen (Svalbard Archipelago), based on a variety of data from 1992 to 2020. Combining satellite imagery, basic meteorological data (air temperature, positive degree day index (PDD), liquid precipitation), sea surface temperature (SST), mean temperature in the glacier forefield bays, fast sea ice cover, and bathymetry near the glacier front, we examined the influence of potential controlling parameters on interannual and seasonal variability of the glacier termini. We found regional synchrony between terminus advance/retreat and climate variables. At a regional scale, annual fluctuation changes are related to PDD and SST, while summer fluctuations are linked to PDD, although individual glaciers are shown to have differing sensitivities to potential climate drivers. We also found that the retreat period in Hornsund generally lasts from June to October‐December. Onset of the retreat is related to sea and air temperature, and in some cases follows the disappearance of the ice cover. These results indicate that the expected increase in meltwater runoff in Svalbard, the input of relatively warm Atlantic water to the fjord, and the increasing trend of longer summer and warmer winter periods will have implications for glacier velocity and frontal ablation.

show abstract

“…The varied settings of study sites allow for the tracking and identification of GMW and other water masses (Straneo et al, 2011;Chauché et al, 2014). Additionally, this sizable dataset can be used as a tool for better understanding the general hydrodynamics and thermodynamics of glacial bays and fjords and may be employed for the validation of coupled glacier-ocean modelling (Cowton et al, 2015;De Andrés et al, 2021;Bertino and Holland, 2017).…”

Section: Discussionmentioning

confidence: 99%

Annual hydrographic variability in Antarctic coastal waters infused with glacial inflow

Osińska¹,

Wójcik-Długoborska²,

Bialik³

2022

Preprint

View full text Add to dashboard Cite

Abstract. During the thirty-eight months between December 2018 and January 2022, multiparameter hydrographic measurements were taken at thirty-one sites within Admiralty Bay, King George Island, Antarctica. These records consisted of water column measurements (down to 100 m) of temperature, conductivity, turbidity, and pH as well as the dissolved oxygen, dissolved organic matter, chlorophyll A and phycoerythrin contents. The sites were chosen due to their variable distances from glacial fronts and open ocean waters. Fifteen sites were localized within smaller glacial coves, with waters highly impacted by glacial infusions; seven sites were located in the open waters of the main body of Admiralty Bay; and nine were located in intermediate conditions of the Ezcurra Inlet. The final dataset consists of measurements carried out over 142 separate days, with an average 3.74 measurements per month. However, data were not collected regularly throughout the year and were collected less frequently during winter, though data were gathered for all but two winter months. On average, each site was investigated 98.2 times. Due to calibration issues, absolute values of optically measured properties occasionally show impossible negative values, but the relative distributions of these values remain valid. Variabilities in the measured properties each season and throughout the whole duration of the project reveal regular oscillations as well as possible long-term trends.

show abstract

Glacier–plume or glacier–fjord circulation models? A 2-D comparison for Hansbreen–Hansbukta system, Svalbard

Cited by 8 publications

References 65 publications

High temporal resolution records of the velocity of Hansbreen, a tidewater glacier in Svalbard

High temporal resolution records of the velocity of Hansbreen, a tidewater glacier in Svalbard

The Response of Tidewater Glacier Termini Positions in Hornsund (Svalbard) to Climate Forcing, 1992–2020

Annual hydrographic variability in Antarctic coastal waters infused with glacial inflow

Contact Info

Product

Resources

About