University of California, Irvine

Earth System Science       

240F Rowland Hall                      

Irvine, CA  92697-3100

(949) 824-5693 (tel)

(949) 824-3874 (fax)


Brett D. Walker
Associate Project Scientist

Email Me

I study the cycling of major carbon and nitrogen reservoirs in the sea – on modern to millennial timescales. I use stable isotopic (δ13C, δ15N) measurements coupled with radiocarbon dating (Δ14C) to constrain sources, sinks and the turnover times of dissolved and suspended particulate organic matter (DOM, POMsusp) in the marine environment. My current research is focused on exploring  the relationships between detrital organic matter physical size, chemical composition and reactivity (14C-age) as a new tool for understanding organic matter transformation and degradation pathways in the coastal and open  ocean.