Recent Publications
	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. pdf file
	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. pdf file
	Clark, J. F. and G. B. Hudson (2001) Tracing hydrothermal fluids in hypersaline Mono Lake using helium isotopes. Limnology and Oceanography, 46, 189-196. pdf file
	Radamacher*, L. K., J. F. Clark, G. B. Hudson, D. C. Erman, and N. A. Erman (2001) Chemical evolution of shallow groundwater as recorded by springs, Sagehen basin, Nevada County California. Chemical Geology, 179, 37-51. pdf file
	Boles, J. R., J. F. Clark, I. Leifer, L. Washburn (2002) Temporal variation in natural methane seep rate due to tides, Coal Oil Point area, California. Journal of Geophysical Research, 106, 27,077-27,086. pdf file
	Clark, J. F., I. Leifer, L. Washburn, B. P. Luyendyk (2003) Compositional changes in natural gas bubble plumes: Observations from the Coal Oil Point Seep Field. Geo-Marine Letters, 23, 187-193.
	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.
	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, and D. Avisar (2005) Gas transport below artificial recharge ponds: Insights from dissolved noble gases and a dual gas (SF6 and 3He) tracer experiment. Environmental Science and Technology, 39, 3939-3945.
	Cook, P. G., S. Lamontagne, D. Berhane, J. F. Clark (2006) Quantifying groundwater discharge to Cockburn River, southeastern Australia, using dissolved gas tracers 222Rn and SF6. Water Resources Research, 42, W10411, doi:10.1029/2006WR004921.
	Leifer, I., B. P. Luyendyk, J. R. Boles, J. F. Clark (2006) Natural marine seepage blowout: Contribution to atmospheric methane. Global Biogeochemical Cycles, 20, GB3008 10.1029/2005GB002668.
	Clark, J. F. and G. B. Hudson (2006) Excess air: A new tracer for artificially recharged surface water. In: Recharge Systems for Protecting and Enhancing Groundwater Resources, IHP-VI, Series on Groundwater No. 13, UNESCO, 342-347.
	*Graduate Student

	Other Signnificant Publications
	Clark, J. F., H. J. Simpson, R. F. Bopp, and B. Deck (1992) Geochemistry and loading history of phosphate and silicate in the Hudson estuary. Estuarine, Coastal and Shelf Science, 34: 213-233.
	Stute, M., P. Schlosser, J. F. Clark, and W. S. Broecker (1992) Paleotemperatures in the southwestern United States derived from noble gas measurements in groundwater. Science, 256, 1000-1003.
	Clark, J. F., R. Wanninkhof, P. Schlosser, H. J. Simpson (1994) Gas exchange in the tidal Hudson River using a dual tracer technique. Tellus, 46B, 274-285.
	Clark, J. F., P. Schlosser, R. Wanninkhof, H. J. Simpson, W. S. F. Schuster, D. T. Ho (1995) Gas transfer velocities for SF6 and 3He in a small pond at low wind speeds. Geophysical Research Letters, 22, 93-97.
	Clark, J. F., H. J. Simpson, R. F. Bopp, and B. Deck (1995) Dissolved oxygen in lower Hudson estuary: 1978-93. Journal of Environmental Engineering, ASCE., 121, 760-763. pdf file
	Stute, M., M. Forster, H. Frischkorn, A. Serejo, J. F. Clark, P. Schlosser, W. S. Broecker, and G. Bonani (1995) 5°C cooling of tropical Brazil during the last glacial maximum. Science, 269, 379-383.
	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. pdf file
	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.
	Macfarlane, P. A., Clark, J. F., Davisson, M. L., Hudson, G. B., and Whittemore, D. O. (2000) Late Quaternary ground water recharge in the central Great Plains from geochemical tracers in shallow ground water. Quaternary Research, 53, 167-174. pdf file
	Quigley*, D. C., J. S. Hornafius, B. P. Luyendyk, R. D. Francis, J. F. Clark, and L. Washburn (1999) Decrease in natural marine hydrocarbon seepage near Coal Oil Point, California associated with offshore oil production. Geology, 27, 1047-1050. pdf file
	Rademacher*, L. K., J. F. Clark, and G. B. Hudson (2002) Temporal changes in stable isotope composition of spring waters: Implications for recent changes in climate and atmospheric circulation, Geology, 20, 139-142. pdf file
	Luyendyk, B. P., J. P. Kennett, and J. F. Clark (2005) Hypothesis for increased atmospheric methane input from hydrocarbon seeps on exposed continental shelves during glacial low sea level. Marine and Petroleum Geology, 22, 591-596.
	Reprints are available

 

 

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