Hydrodynamic modelling of Port Foster, Deception Island, Antarctica

Figueiredo, Daniel Vaz Pato; Santos, Aires dos; Mateus, Marcos; Pinto, Lı́gia

doi:10.1017/s0954102017000463

Cited by 8 publications

(2 citation statements)

References 31 publications

(36 reference statements)

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“…Figueiredo developed a hydrodynamic model [41,42]. His simulation showed limited particle exchange between the bay and its surroundings over one month, contradicting our observations of significant material displacement and sediment accumulation in the eastern area.…”

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confidence: 62%

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Evaluation and Modelling of the Coastal Geomorphological Changes of Deception Island since the 1970 Eruption and Its Involvement in Research Activity

Torrecillas,

Zarzuelo,

de la Fuente

et al. 2024

Remote Sensing

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Deception Island is an active volcano with a submerged caldera open to the sea called Port Foster. Several post-caldera-collapsed volcanic events, as well as hydrodynamics, have changed its inner coastline, shaping new volcanic deposits. A hydrodynamic model is presented to predict accretion and erosion trends in this bay, which could have an impact on the mobility of researchers and tourists. New historical orthophotos and spatio-temporal differences between digital elevation and bathymetric models were used for validation purposes. The model reveals that the south-facing coast is more susceptible to erosion, while the east- or west-facing coast experiences sedimentation. A visual study for the periods 1970–2003 and 2003–2020 in Port Foster obtained similar annual erosion/accretion lineal rates (0.3–2 m/year) in the areas not affected by the last eruptive period, as well as increases of 0.023 km2/year and 0.028 km2/year of the inner bay and coastal sedimentation rates of 0.007 km2/year and 0.002 km2/year, respectively. Only part of the significant total volume loss is received within the bay, including its own erosion, and accumulates on the bay bottom. This is largely because the volume input is composed of snow, and it is also due to the transfer of material outside to balance the figures.

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confidence: 62%

“…Likewise, the Roobol study proposed that the shallow bay was further silted by laharic debris of up to 4 m from the Pond Glacier moraines in the last erupted period [36]. Furthermore, the water dynamics of Port Foster have also received attention in several studies [37][38][39][40][41][42].…”

Section: Previous Studiesmentioning

confidence: 99%

Evaluation and Modelling of the Coastal Geomorphological Changes of Deception Island since the 1970 Eruption and Its Involvement in Research Activity

Torrecillas,

Zarzuelo,

de la Fuente

et al. 2024

Remote Sensing

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Warming and Wrack Supply Will Accelerate CO2 Emission and Nutrients Release on Antarctic Sedimentary Shores: A Case Study on a Volcanic Island

et al. 2020

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The shifts in soil metabolism as a response to warming and wrack subsidies on Antarctic sedimentary shores have not been studied to date. With this aim, macroalgal deposits, as well as inorganic nutrients and CO 2 emission were quantified along the shores of Port Foster, on Deception Island, Antarctic Peninsula. The results indicated a positive relationship between the amount of wrack supplies and sediment metabolism, measured both as CO 2 emission through the sediment surface and as amount of inorganic nutrients released to the interstitial pore water. The effect of warming on algal wrack decay was analyzed in a manipulative field experiment where passive open-top chambers (OTCs) were used to increase soil temperature. By doing this, temperature raised by 0.9°C under patches of the red macroalgae Palmaria decipiens, whereas there was an increase of 2.4°C on bare sand. The results indicated that a small warming accelerated mineralization rates of C, N and P of the algal biomass, without significant changes in the bulk of inorganic nutrients released. Over 12 days of experiment, 8.3% of the total C in algal tissues was released as CO 2 in the OTC plots, compared to 6.4% at ambient temperature. CO 2 emission in bare sand plots warmed with OTCs was three times the amount measured in the ambient plots. Collembola was the dominant soil fauna, with densities negatively affected by warming and positively related to the organic content of sediment. This study confirms the key role of sandy shores in recycling ocean derived organic matter, highlighting the sensitivity of Antarctic ecosystems to a changing scenario of climate change that predicts significant increases in temperature over the next few decades.

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First screening of biocides, persistent organic pollutants, pharmaceutical and personal care products in Antarctic phytoplankton from Deception Island by FT-ICR-MS

et al. 2021

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Hydrodynamic modelling of Port Foster, Deception Island, Antarctica

Cited by 8 publications

References 31 publications

Evaluation and Modelling of the Coastal Geomorphological Changes of Deception Island since the 1970 Eruption and Its Involvement in Research Activity

Evaluation and Modelling of the Coastal Geomorphological Changes of Deception Island since the 1970 Eruption and Its Involvement in Research Activity

Warming and Wrack Supply Will Accelerate CO2 Emission and Nutrients Release on Antarctic Sedimentary Shores: A Case Study on a Volcanic Island

First screening of biocides, persistent organic pollutants, pharmaceutical and personal care products in Antarctic phytoplankton from Deception Island by FT-ICR-MS

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