My research is centered on polar ocean dynamics, with a recent focus on ice-ocean interactions from the mesoscale to microscale near and around ice shelf cavities and fjords in Greenland and Antarctica. Please also see the Movies link for simulations of the following work.
(4) Linking Overturning, Recirculation, and Melt in Glacial Fjords
(3) Dynamics of Eddies Generated by Sea Ice Leads
I co-supervised Kaylie Cohanim, who was an undergraduate researcher at UCLA. Kaylie used an idealized MITgcm configuration to study submesoscale eddy generation beneath sea ice leads.
(2) Geometric Constraints on Glacial Fjord-Shelf Exchange
There are vast cavities forming beneath some of the fastest melting ice shelves in West Antarctica and northern Greenland. One notable example is the Pine Island Glacier in West Antarctica. The Pine Island Glacier has a tall bathymetric sill or “bump” in the seafloor that holds back relatively warm (by a few degrees) water from the open ocean. Our research seeks to understand how the height of the bump holds back open ocean, warm water from melting the glaciers in these regions.
The water within these ice shelf cavities are primarily made up of a warm, denser bottom layer that inflows into the cavities beneath ice shelves. The warm water then melts the glacier and flows out as colder water near the top. In observations, flow inside the cavity appears to have a distinctive two-layer structure, which is why we use a two-layer model to study these dynamics. We have found that most of the dynamics of this cavity flow depends on two parameters, the sill height and top/bottom surface friction (due to the water encountering and being slowed down by the rough seafloor and rough ice shelf face). Therefore, we can use these results to understand how sill height and seafloor friction control the melt rates at the undersides of many of the fastest melting glaciers in Antarctica and Greenland.
(8) Submesoscale Eddies beneath Antarctic sea ice
I am co-supervising Jennifer Kosty, who is an undergraduate researcher at UCLA. Jennifer is using seal and Argo data to find and analyze submesoscale eddies below sea ice around Antarctica.
(6) Energy Balance in the Shallow Water Equations