Antarctic grounding line

Depoorter, Mathieu; Bamber, Jonathan; Griggs, J. A.; Lenaerts, Jan T. M.; Ligtenberg, Stefan; Broeke, M. R. van den; Moholdt, Geir

doi:10.1594/pangaea.819150

Cited by 2 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For each profile, we first created a forward gravity model by assuming three main bodies with different densities (ice, water and crust). Radar ice thickness and surface altimetry were compared to identify the location of the grounding line along track using Depoorter et al (2013) as guide. Gravity inversion for bathymetry was performed along.…”

Section: Gravity Inversionmentioning

confidence: 99%

Cook Ice Shelf and Ninnis Glacier Tongue Bathymetry From Inversion of Operation Ice Bridge Airborne Gravity Data

Constantino

Tinto

2023

Geophysical Research Letters

View full text Add to dashboard Cite

The seafloor depths under the Cook Ice Shelf and Ninnis Glacier Tongue have not been directly measured, despite their importance for understanding ocean circulation and ice shelf change. We model the bathymetry underneath the floating ice and surrounding ocean using airborne gravity data. Our model is constrained by few ship‐based seafloor measurements near the ice front and by ice‐base measurements over areas of grounded ice from radar data. Localized basins (∼1,400 m deep) are found beneath both ice shelves. The shallowest modeled bathymetry (∼200 m) represents the offshore extension of Cape Freshfield. Near the grounding line, seafloor depths are found to be deeper than the observed depth of the modified Circumpolar Deep water in the region (<350 m), key factor for basal melt analyses. From transit flight gravity anomalies, we suggest the relocation of the mapped edge of the continental shelf and a narrowing of the Cook Shelf Depression.

show abstract

Section: Gravity Inversionmentioning

confidence: 99%