GISS Personnel Directory

Dr. Pushker A. Kharecha

Affiliation: Columbia University

NASA Goddard Institute for Space Studies
2880 Broadway
New York, NY 10025 USA

Phone: 212-678-5536


  • Ph.D., Geosciences and Astrobiology, 2005, Penn State University

Further Information:

Research Interests:

I am fascinated by many aspects of Earth science, and my interests encompass a wide range of temporal and spatial scales. Although my doctoral work related to the Earth's ancient anaerobic biosphere (which existed over 3.5 billion years ago, give or take a few hundred million years), when I joined GISS in fall 2005 I moved into climate science in the interest of conducting scientific research that can help to inform sound environmental policies.

My research at GISS focuses on the global carbon cycle, which in simple terms is the exchange of carbon in its various forms (CO2, organic carbon in biomass and soils, etc.) among the different components of the climate system (atmosphere, land, and ocean). I am particularly interested in the human dimensions of the carbon cycle, such as the impacts of past, present, and future land use and fossil fuel use on climate, as well as mitigation of anthropogenic climate change via changes in these activities.