Correction to “A model study of ocean circulation beneath Filchner-Ronne Ice Shelf, Antarctica: Implications for bottom water formation” by Adrian Jenkins and David M. Holland

2002 ◽  
Vol 29 (13) ◽  
Author(s):  
A. Jenkins
Keyword(s):  
Ocean Circulation ◽  
Bottom Water ◽  
Ice Shelf ◽  
Model Study ◽  
Water Formation ◽  
Bottom Water Formation

scholarly journals Does the sensitivity of Southern Ocean circulation depend upon bathymetric details?

2014 ◽  
Vol 372 (2019) ◽  
pp. 20130050 ◽  
Author(s):  
Andrew McC. Hogg ◽  
David R. Munday
Keyword(s):  
Southern Ocean ◽  
Wind Stress ◽  
Ocean Circulation ◽  
Bottom Water ◽  
Deep Ocean ◽  
Ocean Eddies ◽  
Oceanic Response ◽  
Water Formation ◽  
Circumpolar Current ◽  
Bottom Water Formation

The response of the major ocean currents to changes in wind stress forcing is investigated with a series of idealized, but eddy-permitting, model simulations. Previously, ostensibly similar models have shown considerable variation in the oceanic response to changing wind stress forcing. Here, it is shown that a major reason for these differences in model sensitivity is subtle modification of the idealized bathymetry. The key bathymetric parameter is the extent to which the strong eddy field generated in the circumpolar current can interact with the bottom water formation process. The addition of an embayment, which insulates bottom water formation from meridional eddy fluxes, acts to stabilize the deep ocean density and enhances the sensitivity of the circumpolar current. The degree of interaction between Southern Ocean eddies and Antarctic shelf processes may thereby control the sensitivity of the Southern Ocean to change.

Recent recovery of Antarctic Bottom Water formation in the Ross Sea driven by climate anomalies

2020 ◽  
Vol 13 (12) ◽  
pp. 780-786 ◽  
Author(s):  
Alessandro Silvano ◽  
Annie Foppert ◽  
Stephen R. Rintoul ◽  
Paul R. Holland ◽  
Takeshi Tamura ◽  
...  
Keyword(s):  
Bottom Water ◽  
Ross Sea ◽  
Antarctic Bottom Water ◽  
Climate Anomalies ◽  
Water Formation ◽  
Bottom Water Formation

Attenuated carbon sequestration by Weddell Sea dense waters over the 21st century – an assessment with FESOM-REcoM

2021 ◽  
Author(s):  
Cara Nissen ◽  
Ralph Timmermann ◽  
Mario Hoppema ◽  
Judith Hauck
Keyword(s):  
Carbon Sequestration ◽  
Sea Ice ◽  
Continental Shelf ◽  
Bottom Water ◽  
Water Mass ◽  
Weddell Sea ◽  
Ice Shelf ◽  
Deep Waters ◽  
Water Formation ◽  
Water Mass Transformation

<p>Deep and bottom water formation regions have long been recognized to be efficient vectors for carbon transfer to depth, leading to carbon sequestration on time scales of centuries or more. Precursors of Antarctic Bottom Water (AABW) are formed on the Weddell Sea continental shelf as a consequence of buoyancy loss of surface waters at the ice-ocean or atmosphere-ocean interface, which suggests that any change in water mass transformation rates in this area affects global carbon cycling and hence climate. Many of the models previously used to assess AABW formation in present and future climates contained only crude representations of ocean-ice shelf interaction. Numerical simulations often featured spurious deep convection in the open ocean, and changes in carbon sequestration have not yet been assessed at all. Here, we present results from the global model FESOM-REcoM, which was run on a mesh with elevated grid resolution in the Weddell Sea and which includes an explicit representation of sea ice and ice shelves. Forcing this model with ssp585 scenario output from the AWI Climate Model, we assess changes over the 21<sup>st</sup> century in the formation and northward export of dense waters and the associated carbon fluxes within and out of the Weddell Sea. We find that the northward transport of dense deep waters (σ<sub>2</sub>>37.2 kg m<sup>-3</sup> below 2000 m) across the SR4 transect, which connects the tip of the Antarctic Peninsula with the eastern Weddell Sea, declines from 4 Sv to 2.9 Sv by the year 2100. Concurrently, despite the simulated continuous increase in surface ocean CO<sub>2</sub> uptake in the Weddell Sea over the 21<sup>st</sup> century, the carbon transported northward with dense deep waters declines from 3.5 Pg C yr<sup>-1</sup> to 2.5 Pg C yr<sup>-1</sup>, demonstrating the dominant role of dense water formation rates for carbon sequestration. Using the water mass transformation framework, we find that south of SR4, the formation of downwelling dense waters declines from 3.5 Sv in the 1990s to 1.6 Sv in the 2090s, a direct result of the 18% lower sea-ice formation in the area, the increased presence of modified Warm Deep Water on the continental shelf, and 50% higher ice shelf basal melt rates. Given that the reduced formation of downwelling water masses additionally occurs at lighter densities in FESOM-REcoM in the 2090s, this will directly impact the depth at which any additional oceanic carbon uptake is stored, with consequences for long-term carbon sequestration.</p>

scholarly journals Impact of Weddell Sea shelf progradation on Antarctic bottom water formation during the Miocene

2017 ◽  
Vol 32 (3) ◽  
pp. 304-317 ◽  
Author(s):  
Xiaoxia Huang ◽  
Michael Stärz ◽  
Karsten Gohl ◽  
Gregor Knorr ◽  
Gerrit Lohmann
Keyword(s):  
Bottom Water ◽  
Weddell Sea ◽  
Antarctic Bottom Water ◽  
Water Formation ◽  
Bottom Water Formation
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