Jim Happell

One of my research interests involves the use of transient tracers, such as chlorofluorocarbons and tritium, to determine groundwater flow patterns and rates. I am also interested in the role of soils in the global budget of halogenated atmospheric trace gases. I am currently conducting a project that is focusing on obtaining a better estimate of the global soil sink strength for atmospheric carbon tetrachloride. Additionally, I am interested in developing analytical methods for the measurement of halogenated trace gases in water and air.

1. Happell, J. D., S. Opsahl, Z. Top, and J. P. Chanton, Apparent CFC and 3H/3He age differences in water from Floridan Aquifer springs, J. Hydrology, 319, 410-426, 2006.
2. Whiting G.J., J.P. Chanton, D.S. Bartlett and J.D. Happell; Methane flux, net primary productivity and biomass relationships in a sub-tropical grassland community, J. Geophys. Res., 96, 13067-13071, 1991.
3. Chanton J.P., G.J. Whiting, J.D. Happell and G. Gerard, Contrasting rates and diurnal patterns of methane emission from emergent aquatic macrophytes, Aquatic Botany, 46, 111-128, 1993.
4. Happell J.D. and J.P. Chanton, Carbon remineralization in a north Florida flooded forest: effects of water level on the pathways and rates of soil organic matter decomposition, Global Biogeochem. Cycles, 7, 475-490, 1993.
5. Happell J.D., J.P. Chanton, G.J. Whiting and W.J. Showers, Stable isotopes as tracers of methane dynamics in Everglades marshes with and without active populations of methane oxidizing bacteria,  J. Geophys. Res., 98, 14771-14782, 1993.
6. Happell J.D., J.P. Chanton, and W.J. Showers, The influence of methane oxidation on the stable isotopic composition of methane emitted from Florida swamp forests, Geochim. Cosmochim. Acta, 58, 4377-4388, 1994.
7. Happell J.D., J.P. Chanton, and W.J. Showers, Methane transfer across the water-air interface in stagnant wooded swamps of Florida: Evaluation of mass-transfer coefficients and isotopic fractionation, Limnol. Oceanogr., 40, 290-298, 1995.
8. Happell J.D. and D.W.R. Wallace, Methyl iodide in the Greenland/Norwegian Seas and the tropical Atlantic Ocean: Evidence for photochemical production,  Geophys. Res. Lett., 23, 2105-2108, 1996.
9. Happell J. D., D. W. R. Wallace, K. D. Wills, R.J. Wilke, and C.C. Neill, A purge-and-trap capillary column gas chromatographic method for the measurement of halocarbons in water and air, Brookhaven National Laboratory report number BNL-63227, 1-19, 1996.
10. Happell J.D., and D.W.R. Wallace, Gravimetric preparation of gas phase standards containing volatile halogenated compounds for oceanographic  applications, Deep Sea Res., 44, 1725-1738, 1997.
11. Happell J.D., and D.W.R. Wallace, Removal of atmospheric CCl₄ under bulk aerobic conditions in groundwater and soils, Environ. Sci. Technol., 32, 1244-1252, 1998.
12. Happell J.D., and M. P. Roche, Soils: A global sink of atmospheric carbon tetrachloride, Geophys. Res. Lett., 30(2), 1088, doi:10:1029/2002GL015957, 2003.
13. Happell J.D., R.M. Price, Z. Top, and P.K. Swart, Evidence for the removal of CFC-11, CFC-12, and CFC-113 at the groundwater-surface water interface in the Everglades, J. Hydrol. 279, 94-105, doi:10:1016/S0022-1694(03)00169-0, 2003.
14. Price, R.M., Z. Top, J.D. Happell, and P.K. Swart, Use of tritium and helium to define groundwater flow conditions in Eveglades National Park, Water Resour. Res., 39(9), 1267, doi:10:1029/2002WR001929, 2003.
15. Happell, J.D., G.O. Őstlund, and A.S. Mason, A history of atmospheric tritium gas (HT): 1950-2002, Tellus, 56B, 183-193, 2004.