- Email: Karen
- Tel: 1 778 782-7651
- Office: TASC1 8431
- Research site: Climate, Oceans, and Paleo-Environments (COPE) Lab
- BSc, Geology/Biology, Brown University
- MA and MPhil, Geology, Columbia University
- PhD, Earth and Environmental Sciences, Columbia University
Dr. Kohfeld is interested in understanding natural variability and biogeochemical linkages within the ocean and climate system, in order to better assess earth system responses to anthropogenic perturbations. Her research focuses on natural and anthropogenic changes in the ocean carbon cycle, the influence of climate and land surface conditions on atmospheric dust, and assessing and adapting to extreme weather conditions in British Columbia.
Projects related to this research have involved:
- Changes in physical and biological ocean conditions over the last 140,000 years
- Modeling the fate of anthropogenic CO2 that is injected in the deep ocean
- Frequency, intensity, and impacts of extreme weather events in British Columbia
- Climate-induced changes in extreme winds and their effects on the Dust Bowl
- Air quality impacts of climate change in the Lower Fraser Valley of British Columbia
- Changes in marine productivity in the North Pacific Ocean over the last 140,000 years
Many of these projects involve the development of environmental databases, computational data mining, analysis and manipulation of existing data, and collaboration with geologists, marine biologists, sedimentologists, geochemists, and ocean, atmosphere, and biogeochemical modelers.
Example publications include:
- Savo, V., D Lepofsky, J Brenner, KE Kohfeld, J Bailey, and K Lertzman, Observations of climate change among subsistence-oriented communities around the world, Accepted, Nature Climate Change, 15 January 2016.
- Chase, Z, KE Kohfeld, K. Matsumoto, Controls on rates of opal burial in the Southern Ocean, Global Biogeochemical Cycles 29 (10): 1599-1616, 2015.
- Cross, B, KE Kohfeld, HJ Bailey, AB Cooper, Historical variability in wind speed behavior in relation to hydroelectric reservoir inflows, and their implications for wind power development, PLOSOne, 10(8): e0135730. doi:10.1371/journal.pone.0135730, 2015.
- Graham, R, A De Boer, E. van Sabille, KE Kohfeld, C. Schlosser, Inferring source regions and supply mechanisms of iron in the Southern Ocean from satellite chlorophyll data, Deep-Sea Research Part I, 104 (2015) 9–25, 2015.
- Albani, S, NM Mahowald, G. Winckler, RF Anderson, LI Bradtmiller, B Delmonte, R Francois, M Goman, NG Heavens, PP Hesse, SA Hovan, KE Kohfeld, H Lu, V Maggi, JA Mason, PA Mayewski, DM McGee, X Miao, DR Muhs, BL Otto-Bleisner, AT Perry, A Pourmand, HM Roberts, N Rosenbloom, T Stevens, and J Sun, 12,000 years of dust: the Holocene global dust cycle constrained by natural archives, Climate of the Past 11(6): 893-903, 2015.
- Spry, C., KE Kohfeld, D. Allen, K. Lertzman, D. Dunkley, Characterising Pineapple Express Storms in British Columbia using meteorologic, streamflow, and isotope data, Canadian Water Resource Journal, DOI:10.1080/07011784.2014.942574, 2014.
- Matsumoto, K., Z. Chase, KE Kohfeld, Different mechanisms of silicic acid leakage and their biogeochemical consequences, Paleoceanography, 29, doi:10.1002/2013PA002588, 2014.
Future courses may be subject to change.