Massachusetts Institute of Technology
Sign in Create Account

Stephanie Dutkiewicz follows the motion of the ocean, its nutrients, and phytoplankton

A research scientist in MIT’s Earth, Atmospheric, and Planetary Science department, Stephanie Dutkiewicz focuses on biogeochemical cycling and phytoplankton distribution in the ocean. Her research follows the circulation of the ocean, from the surface waters to the depths, and back. Within that cycle, Stephanie focuses on another cycle: she models how oceanic circulation affects the flux of carbon and other nutrients, how the consequent availability of these nutrients drives phytoplankton distributions, and how changes in the phytoplankton community in turn drive changes in nutrient distribution.

Stephanie’s work begins with 3-Dimensional modeling of how ocean waters move and mix, an effort accomplished through collaboration with MIT research scientist Jeffrey Scott. She then overlays information on how carbon, nitrogen, phosphorus, and other nutrients move on top of these computer simulations.

Next, Stephanie models the biological component. “The oceans are responsible for about 50% of primary production,” explains Stephanie. “So 50% of the sunlight that is taken into the body of plant-like organisms (phytoplankton) occurs in the ocean.” These organisms take up carbon and other nutrients and, upon dying, some fraction sink to the bottom of the ocean, carrying those nutrients with them.

But not all phytoplankton are created equal— some species are better able to act as carbon sinks than others. Phytoplankton structure and type is driven by ocean circulation and the distribution of nutrients. Large species pull more carbon into deep ocean reservoirs when they sink; smaller species less.

As climate change affects ocean circulation and nutrient availability, some species may become “winners”, filling ecological niches and spreading to new geographical regions. Other species may die out. Stephanie models how these community structures change in the future, and how those changes in turn affect carbon cycling.

Unfortunately, it seems climate change favors mostly the smaller species, resulting in less of a carbon sink. “Understanding climate change means understanding feedbacks,” says Stephanie. “If the ocean takes up less carbon, that’s a feedback into the carbon system.”

During her 12 years at MIT, Stephanie has contributed to the development of the Joint Program’s Integrated Global Systems Model (IGSM) and collaborated with the MIT Climate Modeling Initiative and the Darwin Project. “I really like the group of people I’m working with. Developing this model has been quite exciting— it’s a good place to be.”

Comments (0)

You need to log in, in order to post comments. If you don’t have an account yet, sign up now!

Researcher Highlights

Researcher Highlights

Category: Education | Updated over 3 years ago

October 05, 2011 10:43
All Rights Reserved (What is this?)
Additional Files

6476 times

More from Researcher Highlights

Noelle Selin

Noelle Selin

Added over 3 years ago | 00:01:31 | 2819 views

Master's student Megan Lickley measures the risks of climate change on coastal energy infrastructure

Master's student Megan Lickley meas...

Added over 4 years ago | 00:01:10 | 21807 views

Vivek Sakhrani

Vivek Sakhrani

Added over 3 years ago | 00:01:00 | 2693 views

Master's student Caleb Waugh studies the impact of air pollutant emission policies on the adaptation of alternative vehicles

Master's student Caleb Waugh studie...

Added over 4 years ago | 00:01:27 | 22974 views

Eri Saikawa

Eri Saikawa

Added over 3 years ago | 00:02:23 | 3067 views

Research Scientist Erwan Monier examines uncertainty in climate change

Research Scientist Erwan Monier exa...

Added 4 years ago | 00:01:58 | 8158 views