Adele K. Morrison

Reduced West Antarctic melt rates and winds drive a salinity increase in the Ross Sea via baroclinic waves

Christina Schmidt, Adele K. Morrison, Matthew H. England, Alessandro Silvano

Freshening of Antarctic shelf waters over the past five decades has reduced Antarctic Bottom Water (AABW) volume. Several periods of salinity increase have, however, occurred in the Ross Sea, most recently since the mid-2010s. Using a high-resolution ocean-sea ice model, we show …

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Changes in Southern Ocean Circulation Across Climate Transitions and Their Impacts on Carbon and Heat Fluxes

Laurie Menviel, Christo Buizert, Zanna Chase, Adele K. Morrison et autres

Today, the Southern Ocean (SO) is the primary sink of anthropogenic heat and carbon, yet anthropogenic warming and ozone depletion have altered its circulation and stratification, creating uncertainty about the persistence of this sink. Evidence from the last glacial period and deglaciation …

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Model sensitivity to the vertical distribution and latent heat loss from Antarctic meltwater

Pedro Colombo, Matthew H. England, Claire K. Yung, Hannah R. S. Dawson et autres

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Assessment of a Finite Volume Discretization of the Horizontal Pressure Gradient Force Beneath Sloping Ice Shelves

Claire K. Yung, Robert Hallberg, Alistair Adcroft, Adele K. Morrison

Abstract The accurate computation of pressure gradients in ocean models is essential for simulating ocean and climate processes. Inaccurate computation can result in spurious velocities on the order of real ocean flows, particularly in quiescent ice shelf cavities. We introduce improvements to …

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Seasonal and Interannual Variability of Antarctic Bottom Water Downstream of the Four Key Formation Regions

P.V. Sholeninova, Adele K. Morrison, Annie Foppert, Andrew McC. Hogg

Abstract Antarctic Bottom Water (AABW) is a cold, dense water mass formed around Antarctica that ventilates the global abyssal ocean. Recent studies have reported widespread warming, freshening, and thinning of AABW, yet its temporal variability remains poorly constrained because of sparse observations. …

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Antarctic Bottom Water formation and dynamics in a changing climate

Christina Schmidt, Matthew H. England, Adele K. Morrison

Two Decades of Ross and Weddell Gyre Variability From Observations

Julia Neme, Matthis Auger, Cosme Mosneron Dupin, Adele K. Morrison et autres

Abstract The Weddell and Ross Gyres influence climate‐relevant processes including poleward heat transport, nutrient upwelling and carbon sequestration. However, long‐term tracking of changes to their circulation is limited by the sparsity of observations characteristic of the region. Here we present observational estimates …

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Two Decades of Ross and Weddell Gyre Variability from Observations

Julia Neme, Matthis Auger, Cosme Mosneron Dupin, Adele K. Morrison et autres

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Dataset, analysis code and model configurations for "Assessment of a finite volume discretization of the horizontal pressure gradient force beneath sloping ice shelves"

Claire K. Yung, Robert Hallberg, Alistair Adcroft, Adele K. Morrison

Dataset, analysis code and model configurations for "Assessment of a finite volume discretization of the horizontal pressure gradient force beneath sloping ice shelves" by C.K. Yung, R. Hallberg, A. Adcroft and A.K. Morrison. This study uses idealised MOM6 seamount, icemount and simple …

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Seasonal and interannual variability of Antarctic Bottom Water downstream of the four key formation regions

P.V. Sholeninova, Adele K. Morrison, Annie Foppert, Andrew McC. Hogg

Antarctic Bottom Water (AABW) is a cold, dense water mass formed around Antarctica that ventilates the global abyssal ocean. Recent studies have reported widespread warming, freshening, and thinning of AABW, yet its temporal variability remains poorly constrained because of sparse observations. This …

MOM6/SIS2 PanAntarctic simulations at 0.1°, 0.05° and 0.025° resolution (repeat year forcing)

Wilton Aguiar, Christina Schmidt, Adele K. Morrison

Sensitivity of M2 barotropic tide solutions to resolution and a physically based wave drag parameterization

Luwei Yang, Callum J. Shakespeare, Adele K. Morrison, Andrew McC. Hogg et autres

Tides can modify sea surface height by several meters, yet their representation in models remains imperfect, largely owing to errors in simulating tidal energy loss. In the open ocean, barotropic tides lose energy to internal tides; this process is typically parameterized using …