Post-doctoral Associates

The core post-doctoral program at JISAO will be soliciting applications this year. An announcement of opportunity will be posted in November with applications due in January. The expectation will be to hire 3-4 applicants. Applicants are required to submit a short research proposal and a letter from a supporting mentor from JISAO or faculty at the College of the Environment or from senior research scientists at NOAA laboratories in Seattle.

JISAO's founding director John M. Wallace had the vision to commit a major share of JISAO's core program budget to support post-doctoral fellows. The program has been highly successful because post-docs are given the opportunity to construct their own research project, encouraging them to think broadly and also work closely with the distinguished scientists at the UW and the NOAA laboratories. The list of former JISAO post-docs is impressive and their current positions indicate the quality of scientists attracted to the program.

JISAO post-docs are appointed for one year with a second-year appointment available assuming reasonable progress. The appointment supports salary, travel expenses, and computing expenses. The program is primarily interested in post-docs whose research interests are aligned with the JISAO research themes. These research themes span atmospheric science, oceanography, climate, and fisheries science. Each post-doc works with a mentor located on the UW campus or at NOAA, Sand Point in Seattle.

For more information on JISAO's core post-doc program, contact Thomas Ackerman, Director, at

Besides the core program, JISAO occasionally has opportunities for other types of post-doc appointments. For more information on about this, contact Mary Smith at

Current Post-docs:

Mariona ClaretMariona Claret
PhD, Physical Oceanography, Joint Program University of Las Palmas de Gran Canaria and Institut de Ciències del Mar, ES, 2012. My current research focuses on changes in ocean circulation with climate variability that have an impact on the oceanic carbon cycle, and oxygen availability. Additionally, I'm fascinated by the physics of smaller scales such as sub-mesoscales, and internal waves, and their interaction with marine biogeochemistry. I use state-of-the-art ocean models to explore questions within these topics that are well-motivated by observations.
Anne GothmannAnne Gothmann
PhD, Geosciences, Princeton University, 2015. My research focuses on the development and application of paleo-proxies in biogenic carbonates. At JISAO, I am particularly interested in investigating coral proxies for the carbonate system using culture experiments and geochemical measurements of coral skeletons. In addition, my work seeks to test models of biomineralization and explore the impacts of ocean acidification and global change on calcifying organisms.

HannahHannah Horowitz
PhD, Earth and Planetary Sciences, Harvard, 2017. Dr. Horowitz is working with Drs. Cecelia Bitz and Lyatt Jaegle, of the UW Department of Atmospheric Sciences, on the first study to examine climate change impacts on the sea ice source of sea-salt aerosol, and to estimate the direct and indirect climate impacts of potential changes to sea-salt aerosol resulting from changing sea ice and warming ocean temperatures in a future climate scenario. Horowitz will investigate the full range of cascading chemistry-climate effects: from changes to sea-salt aerosol production, to reactive halogens and atmospheric oxidant concentrations, and finally to impacts on the greenhouse gases methane and ozone and the toxic pollutant mercury. The process-level understanding gained from these results will improve future studies of chemistry-climate interactions and climate change impacts and inform parameterizations in simpler, computationally inexpensive models. Drs. Jaegle and Bitz submitted a pending NSF proposal focusing on past climate changes, while Horowitz’s focuses on future climate change. These two projects have the potential to be complementary and synergistic.

CristiCristian Proistosescu
PhD, Earth and Planetary Sciences, Harvard, 2017. Dr. Proistosescu is working on a research project that will investigate the interaction between ocean heat uptake and regional climate feedbacks across a range of temporal and spatial scales, with the aim of exploring the prospects for (and limitations of) what can be learned about Earth’s climate sensitivity from the instrumental and paleo records of climate variability and change. Further, his research will build a process-level understanding of how modes of climate variability (such as the PDO, AMOC and ENSO) have consequences for Earth’s global energy budget. These are timely and important topics, given the recent evidence that climate sensitivity is variable, and that future warming may be underestimated from modern climate observations. His research interests dovetail perfectly with several ongoing projects to understand the operation of climate feedbacks under climate variability and change, with Dr. Gerard Roe, UW Earth and Space Sciences, and Dr. Kyle Armour, UW Oceanography. Personal website

HannahHannah Zanowski
PhD, Atmospheric and Oceanic Sciences, Princeton, 2017. Dr. Zanowski is working with Drs. Cecelia Bitz, UW Atmospheric Sciences, and Kyle Armour, UW Oceanography, here on campus, and with Dr. Greg Johnson of NOAA Pacific Marine Environmental Laboratory, on a research project that will include both observational analysis of decade-to-decade historical water-mass changes in the Southern Ocean as well as diagnosis of model output, specifically to study full-depth southern ocean responses to changes in wind and freshwater (buoyancy) forcing when they are applied in the open ocean vs. along the coast. By comparing observations and different climate models (developed at GFDL and NCAR), Dr. Zanowski hopes to elucidate key mechanisms for variability in the Southern Ocean limbs of the meridional overturning.