Professor of Environmental Studies and Earth Science	Office:	Webb Hall 1116
	Phone:	(805) 893-7838
	Fax:	(805) 893-8686
	E-mail:	jfclark@geol.ucsb.edu
	Website:	www.geol.ucsb.edu/faculty/jfclark
	Mailing Address:	Environmental Studies Program University of California, Santa Barbara Santa Barbara, CA 93106-4160
	Courses:	ES 147 Air Quality ES/GEOL 168 River Mixing ES/GEOL 169 Tracer Hydrology ES/GEOL 170 Environmental Geology

Dr. Clark's research interests lie in the general field of aqueous geochemistry and center on 1) the transport of water and dissolved material in groundwater, surface waters, and the coastal ocean, 2) how flow patterns effect water quality, 3) gas exchange across the air-water interface, 4) paleoclimate information stored in ground water aquifers, and 5) determining groundwater flow near artificial recharge facilities, and 6) transport rates of hydrocarbons into the ocean and atmosphere associated with natural marine seepage. He utilizes two distinct geochemical tools. First, short term experiments are conducted by introducing chemical tracers into the water bodies. Second, flow patterns, residence times, mixing rates, paleotemperatures, and paleorecharge rates are inferred from the distribution of natural and anthropogenic tracers.


Education:
Ph.D., Columbia University, 1995

Selected Publications:

Mau, S., D. L. Valentine, J. F. Clark, J. Reed, R. Camilli, and L. Washburn (in-press) "Dissolved methane distributions and air-sea flux in the plume of a massive seep field, Coal Oil Point, California." Submitted to Geophysical Research Letter.

Rademacher, L. K., J. F. Clark, D. W. Clow, G. B. Hudson (2005) "Old groundwater influence on stream hydrochemistry and catchment response in a small Sierra Nevada catchment: Sagehen Creek, California." Water Resources Research, 41, W02004, doi:10.1029/2003WR002805.

Clark, J. F., G. B. Hudson, M. L. Davisson, G. Woodside, and R. Herndon (2004) "Geochemical imaging of flow near an artificial recharge facility, Orange County, CA." Ground Water, 42:167-174.

Leifer, I., J. F. Clark, and R. F. Chen (2000) "Modifications of the local environment by natural marine hydrocarbon seeps." Geophysical Research Letters, 27:3711-3714.

Clark, J. F., Washburn, L., Hornafius, J. S., and Luyendyk, B. P. (2000) "Dissolved hydrocarbon flux from natural marine seeps to the southern California Bight." Journal of Geophysical Research, 105:11,509-11,522.

Clark, J. F., M. Stute, P. Schlosser, S. Drenkard, and G. Bonani (1997) "An isotope study of the Floridan aquifer in Southeastern Georgia: Implications for groundwater flow and paleoclimate." Water Resources Research, 33:281-289.

Clark, J. F., P. Schlosser, M. Stute, and H. J. Simpson (1996) "SF6-3He tracer release experiment: A new method of determining longitudinal dispersion coefficients in large rivers." Environmental Science and Technology, 30:1527-1532.