Our planet is shaped by the interaction of living things with their physical environment. My interests center on understanding these interactions. Since I trained as an oceanographer, my primary expertise is in how the ocean circulates and influences marine life, climate, and atmospheric chemistry. I got my Ph.D. from the MIT/Woods Hole Joint Program in Physical Oceanography and spent over fifteen years in Princeton at Princeton University and NOAA’s Geophysical Fluid Dynamics Laboratory working to develop computer models of how the planet works. In January 2011 I joined the Department of Earth and Planetary Sciences at Johns Hopkins University.
My group's research is currently focused in three major areas
1. Representing climate processes: Climate models try to faithfully represent physical and biological processes or their impacts. Areas of long-term interest include the representation of turbulence at scales ranging from centimeters to tens of kilometers, capturing the impacts of ocean color and understanding the controls on the growth of phytoplankton.
2. Understanding how these processes shape Earth's climate.I'm interested in the large scale circulation of the ocean and how it interacts with the biosphere and carbon cycle, as well as the role of aerosols such as mineral dust and black carbon.
3. Characterizing variability in the climate system. I'm interested in variability and change on a range of scales, from interannual variability associated with El Nino, to detecting biological and physical changes driven by anthropogenic climate change, to understanding multi-millennial variability in the carbon cycle.
More information on each of these topics can be found by clicking on the "Research areas" tab.
270.103: Introduction to Global Environmental Change and Sustainability
270.224: Oceans and Atmospheres (Spring semesters)
270.323: Ocean Biogeochemical Cycles (Spring 2018)
270.325: Introductory Oceanography (Last taught, Spring 2017)
270.327: Field Experience in Bermuda (Intersession 2018, focus on the ocean's role in the global carbon cycle)
270.425: Earth and Planetary Fluids (co-taught, fall semesters)
270.611: Advanced Atmospheric Dynamics (Last taught, Fall 2016)
270.620: Seminar in Geophysical Turbulence (Last taught,Fall 2015)
270.644: Physics of Climate Variability (Last taught, Fall 2014)
270.654: Environmental Data Analysis (Fall 2017)
May 24, 2017: Congratulations to undergraduates Julia Chavarry and Josh McCurry who graduated today after finishing senior theses. Julia's thesis examined optimal fishing strategies in a fishery with different types of diseases while Josh worked on characterizing the impact of anthropogenic organic carbon emissions on the climate.
September 13, 2017: Link to news release for recent paper by Cabre, Marinov and Gnanadesikan.
January 2018: Link to student essay on a new field experience course in Bermuda.
Feb. 20, 2018: Congratulations to graduate student Jordan Thomas (co-advised with Darryn Waugh) who defended her dissertation looking at the role of natural variability in physical climate and biogeochemical cycling.
April 28, 2018: Congratulations to graduate student Eshwan Ramudu, who defended his thesis on the physics of turbulent heat transfer in melting ice.