Jason A Addison, Ph.D.
Jason is a Research Geologist with Geology, Minerals, Energy, and Geophysics Science Center. He received a Ph.D in Geological Sciences from University of AK Fairbanks, a BS in Geological Sciences and in Aquatic and Fisheries from University of Washington. Since joining the USGS in 2011 as a Mendenhall Research Fellow, he has continued to put his expertise as a paleoceanographer to work.
Biography
Jason Addison obtained his PhD in Geological Sciences at the Univeristy of Alaska Fairbanks in 2009. He is a research geologist in the Geology, Minerals, Energy, and Geophysics Science Center, stationed in Menlo Park, CA. Jason is trained to use geochemical proxies to reconstruct past ocean conditions. His primary interest is in how past climates affect ocean ecosystems in the North Pacific Ocean during the Holocene (past 11,700 years). He is currently contributing to different projects using geochemical and geophysical tools to reconstruct past ocean ecosystem productivity and environmental conditions using multiple processes from organic carbon, CaCO3, and biogenic silica concentrations; organic matter (C & N) stable isotope ratios; inorganic trace metal data; 3-D computerized tomography (CT) scanning; core-scanning XRF; to multivariate statistical analyses. In addition, he also uses a combination of radiocarbon dating, tephrochronology (the identification and dating of volcanic ash deposits), and varve counts to develop robust age-depth models in marine sediment cores.
Professional experience:
- 2014 - current: USGS Research Geologist
- 2011- 2014: USGS Mendenhall Research Fellow
- 2010 - 2011: Idaho State University Postdoctoral Scientist
Education:
- 2009 - Ph.D., Geological Sciences, University of Alaska Fairbanks
- 2004 - B.S., Geological Sciences, University of Washington [with Distinction]
- 2004 - B.S., Aquatic and Fisheries Sciences, University of Washington [with Distinction]
Science and Products
Pacific Ocean Patterns, Processes, and Productivity (POP3): Impacts of ancient warming on marine ecosystems and western North America
Projections for AD 2100 suggest warming of +1-4°C in the North Pacific Ocean, which will result in widespread transformations throughout the marine environment and western North America. Many of these changes are beyond the predictive capabilities of current climate models. To better address this future uncertainty, our team is developing a geological framework using past warm intervals as...
A Holocene history of upwelling along the northern California coast
This article is part of the Fall 2017 issue of the Earth Science Matters Newsletter.