Intrusion of warm surface water beneath the McMurdo Ice Shelf, Antarctica

Stern, A. A.; Dinniman, Michael S.; Zagorodnov, V.; Tyler, S. W.; Holland, David M.

doi:10.1002/2013jc008842

Cited by 53 publications

(70 citation statements)

References 43 publications

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“…Fimbul Ice Shelves in the Weddell Sea (Makinson and Nicholls, 1999;Joughin and Padman, 2003;Hatterman et al, 2012) and the Ross and McMurdo Ice Shelves in the Ross Sea (Arzeno et al, 2014;Stern et al, 2013).…”

Section: Ocean-ice Shelf Interactionmentioning

confidence: 99%

Ocean-Ice Shelf Interaction in East Antarctica

Silvano¹,

Rintoul²,

Herráiz‐Borreguero³

2016

Oceanog.

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Section: Ocean-ice Shelf Interactionmentioning

confidence: 99%

Ocean-Ice Shelf Interaction in East Antarctica

Silvano¹,

Rintoul²,

Herráiz‐Borreguero³

2016

Oceanog.

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“…Ice dynamics are based on an elastic-viscous-plastic rheology (Hunke and Dukowicz 1997;Hunke 2001). The ice model only has one thickness category, but this appears to be adequate as there is little multiyear ice in the Antarctic (Comiso 2010), and this model has proven to accurately simulate sea ice concentrations in other regional implementations around Antarctica (Dinniman et al 2011;Stern et al 2013). The ice shelves in the model are static; there is no thinning (or thickening) of the ice shelf, nor any iceberg calving parameterization or moving icebergs.…”

Section: Circulation Model and Experimentsmentioning

confidence: 99%

“…Vertical mixing on the shelf, which changes CDW heat content, must also be properly represented. Nearshore surface processes that lead to warming of surface waters that can still penetrate below the ice shelf fronts (Hattermann et al 2012;Stern et al 2013;Arzeno et al 2014) need to be accurately modeled in order to account for mode 3 melting.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves*,+

et al. 2015

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Oceanic melting at the base of the floating Antarctic ice shelves is now thought to be a more significant cause of mass loss for the Antarctic ice sheet than iceberg calving. In this study, a 10-km horizontal-resolution circum-Antarctic ocean-sea ice-ice shelf model [based on the Regional Ocean Modeling System (ROMS)] is used to study the delivery of ocean heat to the base of the ice shelves. The atmospheric forcing comes from the ERA-Interim reanalysis (;80-km resolution) and from simulations using the polar-optimized Weather Research and Forecasting Model (30-km resolution), where the upper atmosphere was relaxed to the ERAInterim reanalysis. The modeled total basal ice shelf melt is low compared to observational estimates but increases by 14% with the higher-resolution winds and just 3% with both the higher-resolution winds and atmospheric surface temperatures. The higher-resolution winds lead to more heat being delivered to the ice shelf cavities from the adjacent ocean and an increase in the efficiency of heat transfer between the water and the ice. The higher-resolution winds also lead to changes in the heat delivered from the open ocean to the continental shelves as well as changes in the heat lost to the atmosphere over the shelves, and the sign of these changes varies regionally. Addition of the higher-resolution temperatures to the winds results in lowering, primarily during summer, the wind-driven increase in heat advected into the ice shelf cavities due to colder summer air temperatures near the coast.

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“…A coupled ocean-sea ice-ice shelf model has been developed for the Ross Sea using an implementation of the Regional Ocean Modeling System (Dinniman et al 2007Stern et al 2013). The model domain extends from the coast offshore approximately 350-400 km north beyond the shelf break, with horizontal resolution of 5 km and 24 vertical sigma levels.…”

Section: Circulation Modelmentioning

confidence: 99%

“…The depth of each vertical layer varies according to the bottom depth, with higher resolution toward the surface and near the bottom of the water column. Details of the model configuration, including forcing, sea ice, and initial and boundary conditions, are described in Stern et al (2013). The circulation fields used in this study were obtained from simulations that started on September 15, 2010.…”

Section: Circulation Modelmentioning

confidence: 99%

Modeling the transport and fate of euphausiids in the Ross Sea

et al. 2015

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Antarctic krill (Euphausia superba) and crystal krill (Euphausia crystallorophias), important components of the Ross Sea food web, differ in their population distribution. The objective of this study was to determine whether these differing distributions result primarily from differences in spawning locations, larval development times, and transport by the Ross Sea circulation. To address this objective, Lagrangian particle tracking experiments were used to simulate the transport of larvae of Antarctic krill and crystal krill. The particle simulations showed that regions providing inputs of Antarctic krill to the Ross Sea were along the outer shelf/slope. Crystal krill transport and retention were along the shallow banks on the outer Ross Sea shelf. Particles initialized in the inner shelf off Victoria Land showed high retention in the region south and along the Terra Nova Bay polynya, with timescales consistent with development times of crystal krill. These results suggest that the cyclonic circulation over the shelf contributes significantly to the dispersion and retention of crystal krill in parts of the inner Ross Sea continental shelf that overlaps with regions with high concentrations of krilldependent top predators. The westward circulation along the shelf break contributes to the transport and aggregation of Antarctic krill in regions where Circumpolar Deep Water is observed on the outer continental shelf and along the shelf break. The transport pathways and connectivity obtained from this study provide a baseline for assessing the effects of projected changes in the Ross Sea circulation on the distribution of two important krill species.

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Intrusion of warm surface water beneath the McMurdo Ice Shelf, Antarctica

Cited by 53 publications

References 43 publications

Ocean-Ice Shelf Interaction in East Antarctica

Ocean-Ice Shelf Interaction in East Antarctica

The Effect of Atmospheric Forcing Resolution on Delivery of Ocean Heat to the Antarctic Floating Ice Shelves*,+

Modeling the transport and fate of euphausiids in the Ross Sea

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