Understand physical processes governing ice-ocean interactions in ice-shelf cavities

Organization

National Aeronautics and Space Administration (NASA)

0347-NPP-NOV
26-JPL-Earth Sci

11/1/2026 6:00:59 PM Eastern Time Zone

About the NASA Postdoctoral Program

The NASA Postdoctoral Program (NPP) offers unique research opportunities to highly-talented scientists to engage in ongoing NASA research projects at a NASA Center, NASA Headquarters, or at a NASA-affiliated research institute. These one- to three-year fellowships are competitive and are designed to advance NASA’s missions in space science, Earth science, aeronautics, space operations, exploration systems, and astrobiology.

Nearly half of Antarctica's ice mass loss comes from melting at the base of the ice shelf, known as basal melting (Rignot et al, 2013). As the ocean warms, we expect this contribution to increase. Depending on the water masses that reach the deepest locations of the ice shelf, called the grounding line, ice shelves can be broadly classified as warm or cold (Fricker et al, 2025).

Different processes play a pivotal role in these cavities.

This research opportunity aims to understand the physical processes governing ice‑ocean interactions in these different ice‑shelf cavities using a combination of ocean models, available in‑situ data, and satellite observations. The study builds on analyses from a consortium of models, such as Estimating the Circulation and Climate of the Ocean (ECCO, http://(Use the "Apply for this Job" box below).) and LLC configurations, satellite observations such as ICESat‑2 or equivalent products, hydrographic datasets, and available in‑situ measurements.

Particular emphasis will be placed on understanding tidal and seasonal variability in basal melt rates and ocean circulation pathways. Research opportunities include analyzing observational and modeling results, developing process‑modeling studies and diagnostics, translating process‑level understanding into parameterizations for realistic Antarctic ice shelves, and investigating the strengths and limitations of different modeling systems.

The results could support targeted high‑resolution regional modeling studies, inform optimal locations for deploying field instruments such as Ice Node, improve estimates and parameterizations of basal melt for large‑scale ice‑sheet models such as ISSM, and provide a pathway toward increasingly integrated model–observation frameworks, including data assimilation.

References:

E Rignot, S Jacobs, J Mouginot, B Scheuchl, Ice‑shelf melting around Antarctica. Science 341, 266–270 (2013).

H Fricker, B K Galton‑Fenzi, Catherine Walker, Bryony Freer, Laurie Padman, and Robert Deconto, Antarctica in 2025:
Drivers of deep uncertainty in projected ice loss. Science (2025). DOI:10.1126/science.adt
9619

Earth Science

Ian Fenty

Ian.

Fentya.gov

A complete list of Designated Countries can be found at: https://.

• U.S. Citizens;
• U.S. Lawful Permanent Residents (LPR);
• Foreign Nationals eligible for an Exchange Visitor J-1 visa status; and,
• Applicants for LPR, asylees, or refugees in the U.S. at the time of application with
  1) a valid EAD card and
  2) I-485 or I-589 forms in pending status

Please email npp

PhD in Earth Science, remote sensing, oceanography, or equivalent

Experience with Mitgcm, satellite data processing, and in‑situ data analysis preferred. Understanding of the processes happening at the ice‑ocean interface is strongly desired.

Mikeala

• Degree:
  Doctoral Degree.