Rod G. Zika

My research group's current efforts in marine chemistry involve: 1) studies of the aqueous chemistry of hydrogen peroxide, superoxide radical and organic radicals; 2) the photochemically induced change in the speciation of biologically important metals in seawater; 3) sunlight degradation of dissolved organic compounds 4) the biological and photochemical production of volatile organic compounds, 5) the effects of volatile organic compounds on the production of ozone in the troposphere and 6) the effects of UV-B solar radiation on photosynthetic organisms.

Zika, R.G. and E.S. Saltzman.  1982. Interaction of ozone and hydrogen peroxide in water: Implications for analysis of H2O2 in air.  Geophys.  Res. Lett., 9 (3): 231-234.

Zika, R.G., E.S. Saltzman, W.L. Chameides, and D.D. Davis.  1982  Hydrogen peroxide levels in rainwater collected in South Florida and the Bahama Islands.  J. Geophys. Res., 87 (C7): 5015-5017.

Cooper, W.J. and R.G. Zika.  1983  Photochemical formation of H2O2 in surface and ground waters exposed to sunlight.  Science, 220 (4598): 711-712.

Moffett, J.W. and R.G. Zika.  1983  Oxidation kinetics of Cu(I) in  seawater: Implications for its existence in the marine environment.   Mar. Chem., 13 (3): 239-251.

Saltzman, E.S., D. Savoie, R.G. Zika and J. Prospero.  1983  Methane sulfonic acid in the marine atmosphere.  J. Geophys. Res. 88 (C15): 10897-10902.

Saltzman, E.S., L.T. Gidel, R.G. Zika, P.J. Milne, J.M. Prospero, D.L. Savoie and W.B. Cooper.  1984.  Atmospheric chemistry of methane sulfonic acid.  JAPCA, TR-2: 251-262.

Zafiriou, O.C., J. Joussot-Dubier, R.G. Zepp and R.G. Zika. 1984. Photochemistry of natural waters.  Environ. Sci. Tech., 18 (12): 358A-371A.

Zika, R.G., L.T. Gidel and D.D. Davis.  1984. A comparison of photolysis and substitution decomposition rates of methyl iodide in seawater.  Geophys. Res. Lett., 11 (4): 353-356.

Cooper, W.J., R.G. Zika and M.S. Steinhauer.  1985. The effect of bromide in water treatment: II.  A literature review of ozone and bromide interactions and the formation of organic bromide.  Ozone: Sci. Engineer., 7 (4): 313-325.

Cooper, W.J., R.G. Zika and M.S. Steinhauer.  1985. Bromide-oxidant interactions and THM formation: a literature review.  J. Am. Water Works Assoc., 77 (4): 116-121.

Moffett, J., R.G. Zika, and R. Petasne.  1985. Evaluation of bathocuproine for the spectrophotometric determination of copper(I) in copper redox studies with applications in studies of natural waters.  Anal. Chim. Acta., 175: 171-179.

Saltzman, E.S., D.L. Savoie, J.M. Prospero and R.G. Zika. 1985. Atmospheric methanesulfonic and non-sea-salt sulfate at Fanning and American Samoa. Geophys. Res. Lett., 12 (7): 437-440.

Zika, R.G., E. Saltzman and W.J. Cooper.  1985. Hydrogen peroxide concentration in the Peru Upwelling area.  Mar. Chem., 17: 265-275.

Zika, R.G., J. Moffett, R. Petasne, W.J. Cooper,  and E. Saltzman.  1985. Spatial and temporal variations of hydrogen peroxide in Gulf of Mexico waters.  Geochim. Cosmochim. Acta, 49 (5): 1173-1184.

Cooper, W.J., G.L. Amy, C.A. Moore and R.G. Zika.  1986. Bromoform formation in ozonated groundwater containing bromide and humic substances.  Ozone Sci. Eng., 8 (1): 63-76.

Saltzman, E.S., D.L. Savoie, J.M. Prospero and R.G. Zika.  1986. Methane sulfonic acid and non-sea-salt sulfate in Pacific air: regional and seasonal variations.  J. Atmos. Chem., 4: 227-240.

Saltzman, E.S., D.L. Savoie, J.M. Prospero, R.G. Zika and B. Mosher.   1986. Elevated atmospheric sulfur levels off the Peruvian coast.  J. Geophys. Res., 91 (D7): 7913-7918.

Cooper, W.J., D.J. Cooper, E.S. Saltzman, W.Z. de Mello, D.L. Savoie, R.G. Zika and J.M. Prospero.  1987. Emissions of biogenic sulfur compounds from several wetland soils in Florida.  Atmos. Environ. 21 (7): 1491-1495.

Cooper, W.J., E.S. Saltzman and R.G. Zika.  1987. The contribution of rainwater to variability in surface ocean hydrogen peroxide.  J. Geophys. Res., 92 (C3): 2970-2980.

Cooper, D.J., W.Z. de Mello, W.J. Cooper, R.G. Zika, E.S. Saltzman, J.M. Prospero and D.L. Savoie.  1987. Short term variability in the biogenic sulfur emissions from a Florida Spartina alterniflora marsh.  Atmos. Environ., 21 (1): 7-12.

de Mello, W.Z., D.J. Cooper, W.J. Cooper, E.S. Saltzman, R.G. Zika, D.L. Savoie and J.M. Prospero.  1987. Spatial and diel variability in the emissions of some biogenic sulfur compounds from a Florida Spartina alterniflora coastal zone.  Atmos. Environ., 21 (4): 987-990.

Moffett, J.W. and R.G. Zika.  1987. Reaction kinetics of hydrogen peroxide with copper and iron in seawater.  Environ. Sci. Tech. 21 (8): 804-810.

Mopper, K. and R.G. Zika. 1987.  Free amino acids in marine rains:    Evidence for oxidation and potential role in nitrogen cycling.  Nature, 325 (6101): 246-249.

Moffett, J.W. and R.G. Zika.  1987. Solvent extraction of copper acetylacetonate in studies of copper (II) speciation in seawater.  Mar. Chem. 21 (4): 301-313.

Petasne, R.G. and R.G. Zika.  1987. The fate of superoxide in coastal seawater.  Nature, 325 (6104): 516-518.

Zika, R.G.  1987. Advances in marine photochemistry, 1983-1987.  Rev. Geophys., 25 (6): 1390-1394.

Cooper, W.J., R.G. Zika, R.G. Petasne and J.M.C. Plane. 1988. Photochemical formation of H2O2 in natural waters exposed to sunlight. Environ. Sci. Tech., 22 (10): 1156-1160.

Moffett, J.W. and R.G. Zika.  1988. Measurement of copper (I) in surface waters of the subtropical Atlantic and Gulf of Mexico.  Geochim. Cosmochim. Acta., 52 (7): 1849-1857.

Schott, F., K.D. Leaman and R.G. Zika.  1988. Deep mixing in the Gulf of Lions, revisited.  Geophys. Res. Lett., 15 (8): 800-803.

Zika, R.G.  1988. Chemical and physical characterization of chromophoric organic material.  App. Geochem., 3 (1): 69.

Amador, J.A., M. Alexander and R.G. Zika.  1989. Sequential photochemical and microbial degradation of organic molecules bound to humic acid.  App. and Environ. Microbiol., 55 (11): 2843-2849.

Milne, P. J., and R.G. Zika.  1989. Luminescence quenching of dissolved organic matter in seawater. Mar. Chem. 27 (3-4): 147-164.

Amador, J.A., P.J. Milne, C.A. Moore and R.G. Zika.  1990. Extraction of chromophoric humic substances from seawater.  Mar. Chem., 29 (1): 1–17.

Kouassi, A.M., and R.G. Zika.  1990. Light-Induced Alteration of the Photophysical Properties of Dissolved Organic Matter in Seawater: Part I. Photoreversible properties of natural water fluorescence.  Neth. J. Sea Res., 27 (1): 25-32.

Kouassi, A.M., R.G. Zika, and J.M.C. Plane.  1990. Light-Induced Alteration of the Photophysical Properties of Dissolved Organic Matter in Seawater: Part II. Estimates of the environmental rates of the natural water fluorescence Neth. J. Sea Res., 27 (1): 33-41.

Moffett, J.W., R.G. Zika and L.E. Brand.  1990. Distribution and potential sources and sinks of copper chelators in the Sargasso Sea.  Deep Sea Res., 37 (1A): 27-36.

Amador, J.A., R.G. Zika and M. Alexander.   1991. Degradation of aromatic compounds bound to humic acid by the combined action of sunlight and microorganisms.  Env. Toxicol. Chem., 10 (4): 475-482.

Kouassi, A.M. and R.G. Zika.  1992. Light-induced destruction of the absorbance property of dissolved organic matter in seawater.  Toxicol. Environ. Chem., 35: 195-211.

Milne, P.J. and R.G. Zika.  1992. Crosslinking of collagen gels: photochemical measurements.  Proc. SPIE-Int. Soc. Opt. Eng., 1644 (Proc. Ophthalmic Technol. II): 115-124.

Farmer, C.T., C.A. Moore, R.G. Zika and R.J. Sikorski.  1993. Effects of low and high Orinoco River Flow on the Underwater Light Field of the Eastern Caribbean Basin.  J. Geophys. Res. 98 (C2): 2279-2288.

Milne, P.J. and R.G. Zika. 1993.  Amino-acid nitrogen in atmospheric aerosols: occurrence, sources, and photochemical modification - a review.  J. Atmos. Chem.  16 (4):361-98.

Moore, C.A., C.T. Farmer and R.G. Zika.  1993. The Influence of the Orinoco River on Hydrogen Peroxide Distribution and Production in the Eastern Caribbean.  J. Geophys. Res. 98 (C2): 2289-2298.

Sikorski, R.J., and R.G. Zika.  1993. Modeling Mixed-Layer Photochemistry : Optical and chemical modeling.  J. Geophys. Res. 98 (C2): 2315-2328.

Sikorski, R.J., and R.G. Zika.  1993. Modeling Mixed-Layer Photochemistry: Physical and Chemical Modeling.  J. Geophys. Res. 98 (C2): 2329-2340.

Zhu, X, J.M. Prospero, D.L. Savoie, F.J. Millero, R.G. Zika and E.S. Saltzman.  1993. Photoreduction of iron(III) in marine mineral aerosol solutions.  J. Geophys. Res. 98: 9039-9046.

Zika, R.G., P.J. Milne and O.C. Zafiriou.  1993. Photochemical studies of the Eastern Caribbean: an introductory overview.  J. Geophys. Res. 98 (C2): 2223–2232.

Farmer, Charles T., Peter J. Milne, Daniel D. Riemer and Rod G. Zika.  1994. Continuous hourly analysis of C2-C10 non-methane hydrocarbon compounds in urban air by GC-FID.  Environ. Sci. Technol.  28 (2): 238-245

Riemer, Daniel D., Peter J. Milne, Charles T. Farmer and Rod G. Zika.  1994. Determination of terpene compounds and related species in semi-urban air by GC-MSD.  Chemosphere 28 (4): 837-850.

Apel, Eric C., Jack G. Calvert, Rod Zika, Michael O. Rodgers, Viney P. Aneja, James F. Meagher and William A. Lonneman.  1995. Hydrocarbon measurements during the 1992 Southern Oxidants Study Atlanta Intensive: Protocol and quality assurance.  J. Air & Waste Manage. Assoc.  45 521-528.

Bernardo- Bricker, Anna, Charles Farmer, Peter Milne, Daniel Riemer Rod Zika and Christopher Stoneking.  1995. Validation of speciated nonmethane organic compound data collected during the Atlanta intensive 1992 as part of the Southern Oxidants Study (SOS).  J. Air Waste Manage. Assoc. 45 591-603.

Milne, Peter J., Daniel D. Riemer, Rod G. Zika and Larry E. Brand.  1995. Measurement of vertical distribution of isoprene in surface seawater, its chemical fate,  and its emission from several phytoplankton monocultures.  Mar.  Chem. 48 237-244

Ortner, Peter B., Thomas N. Lee, Peter J. Milne, Rod G. Zika, M. Elizabeth Clarke, Guillermo P. Podesta, Peter K. Swart, Patricia A. Tester, Larry P. Atkinson, and Walter R. Johnson.  1995.  Mississippi River flood waters that reached the Gulf Stream.  J. Geophys. Res. Lett. 100 (C7) 13,595-13,601.

Petasne, Robert G. and Rod G. Zika. 1997.  Hydrogen peroxide lifetimes in South Florida coastal and offshore waters.  Mar. Chem. 56: 215-225

Pos, W. H., P. J. Milne, D. D. Riemer and R. G. Zika.  1997.  Photoinduced oxidation of H₂S species: A sink for sulfide in seawater.  J. Geophys. Res. 102(D11): 12,831-12,837

Pos, W. H., D. D. Riemer, and R. G. Zika. 1998. Carbonyl sulfide (OCS)and carbon monoxide (CO) in natural waters: evidence of a coupled mechanism.  Marine Chemistry 62: 89-101

Apel, E. C., J. G. Calvert, D. Riemer, W. Pos, R. G. Zika, T. E. Kleindienst, W. A. Lonneman, K. Fung, E. Fujita, P. B. Shepson, T. K. Starn and P. T. Roberts. 1998 Measurements comparison of oxygenated volatile organic compounds at a rural site during the 1995 SOS Nashville Intensive.  J. Geophys. Res. 103(D17): 22,295-22,316.

Apel, E. C., J. G. Calvert, J. P. Greenberg, D. Riemer, R. G. Zika, T. E. Kleindienst, W. A. Lonneman, K. Fung, and E. Fujita. 1998. Generation and validation of oxygenated volatile organic carbon standards for the 1995 Southern Oxidants Study Nashville Intensive.  J. Geophys. Res. 103(D17):  22,281-22,294.

Kleinman, Lawrence I., Peter H. Daum, Dan G. Imre, Carlos Cardelino, Kenneth J. Olszyna and Rod G. Zika. 1998. Trace gas concentrations and emission s in downtown Nashville during the 1995 Southern Oxidants Study/Nashville Intensive. J. Geophys. Res. 103(D17): 22,545-22,553

Nouaime, G., S. B. Bertman, C. Seaver, D. Elyea, H. Huang, P. B. Shepson, T. K. Starn, D. D. Riemer, R. G. Zika, and K. J. Olszyna. 1998. Sequential oxidation products from tropospheric isoprene chemistry: MACR and MPAN at a NOx-rich forest environment in the southeastern U.S. J. Geophys. Res., 103(D17):  22,463-22,471.

Parrish, D. D., M. Trainer,  V. Young, P. D. Goldan, W. C. Kuster, B. T. Jobson, F. C. Fehsenfeld,  W. A. Lonneman, R. G. Zika, C. T. Farmer, D. D. Riemer, and M. O. Rodgers.  1998. Internal consistency tests for evaluation of measurements of anthropogenic hydrocarbons in the troposphere. J. Geophys. Res., 103(D17): 22,339-22,359.

Starn, T. K., P.B. Shepson, S. B. Bertman,  D. D. Riemer,R. G. Zika, and K. Olszyna. 1998. Nighttime isoprene chemistry at an urban-impacted forest site. J. Geophys. Res. , 103(D17):  22,437-22,447.

Starn, T. K., P. B.Shepson, S. B. Bertman,  J. S. White, B. G. Splawn,, D. D. Riemer, R. G. Zika, and K. J.  Olszyna  1998.  Observations of isoprene chemistry and its role in ozone production at a  semi-rural site during the 1995 Southern Oxidants Study. J. Geophys. Res. , 103(D17): 22,425-22,435.

Riemer, Daniel, Willer Pos, Peter Milne, Charles Farmer , Rod Zika, Eric Apel, Ken Olszyna, Tad Kliendienst, William Lonneman, Steve Bertman, Paul Shepson and  Tim Starn. 1998 Observations of nonmethane hydrocarbons and oxygenated volatile organic compounds  at a rural site in the southeastern United States. J. . Geophys. Res. 103(D21): 26,111-28,128

Milne, P. J., A. Prados, R. R. Dickerson, B. G. Doddridge, D. D. Riemer, R. G. Zika, J. T. Merrill, and J. L. Moody,  2000. Nonmethane hydrocarbon mixing ratios in continental outflow air from eastern North America: Export of ozone precursors to Bermuda.  J. Geophys. Res., 105(D8): 9,981-9,990.

Riemer, D. D.,  P. J. Milne, and R. G. Zika,  2000 Photoproduction of nonmethane hydrocarbons (NMHCs) in seawater, Mar. Chem. 71:117-198

Barket, D., J.M.  Hurst, T. L. Couch, A. Colorado, P. B.  Shepson, D. Riemer, A.J.  Hills, E. Apel, R. Hafer, B. K. Lamb, H. H. Westberg, , C. T. Farmer, E. R. Stabenau, and R. G. Zika, 2001. Intercomparison of automated methodologies for determination of ambient isoprene during the PROPHET 1998 summer campaign, J. Geophys. Res 108(D20): 24301 -24313

Kang, Daiwen , Viney P. Aneja, Rod G. Zika, Charles Farmer and John D. Ray.  2001. Nonmethane hydrocarbons in the rural southeast United States national parks. J. Geophys. Res. 106(D3): 3133-3155

Zanardi-Lamardo, E, C.D. Clark, R.G. Zika. 2001.  Frit inlet/frit outlet flow field-flow fractionation: methodology for colored dissolved organic material in natural waters Analyt. Chim. Acta, 443 (2): 171-181

Clark, Catherine D., Jennifer Jimenez-Morais,  Guilford Jones II, Eliete Zanardi-Lamardo, Cynthia A. Moore and Rod G. Zika  2002.  A Time-Resolved Fluorescence Study of Dissolved Organic Matter in a Riverine to Marine Transition Zone.  Mar. Chem.. 78:121-135.

Sillman S, Carroll MA, Thornberry T, Lamb BK, Westberg H, Brune WH, Faloona I, Tan D, Shepson PB, Sumner AL, Hastie DR, Mihele CM, Apel EC, Riemer DD, Zika RG  2002  Loss of isoprene and sources of nighttime OH radicals at a rural site in the United States: Results from photochemical models  J. Geophys. Res. 107(D5-D6) art # 4043 Mar 2002

Zanardi-Lamardo, E., Catherine D. Clark, Cynthia  A. Moore and Rod G. Zika   2002 Comparison  of the Molecular Mass and Optical Properties of Colored Dissolved Organic Material in Two Rivers and Coastal Waters by Flow Field-Flow Fractionation.. Envir. Sci. Technol.,36: 2806-2814.

Houston, Thomas, Rod G. Zika, Geoffrey K. Morrison, Richard Wood, and Arthur Barbeito.  2003 Water Monitoring, Data collection and Transmission Module. United States Patent no. US 6,536,272 B1, Mar. 25 2003  http://patft.uspto.gov/netahtml/srchnum.htm:

Coble, P. G., R. G. Zepp and R. G. Zika. 2004. CDOM in the ocean: Transformation Processes and Their Effects on Optical Properties. Mar. Chem. 89(1-4): 1-2.

Clark, Catherine D., William T. Hiscock, Frank J. Millero, Gary Hitchcock, Larry Brand, William L. Miller, Lori Ziolkowski, Robert F. Chen and Rod G. Zika.  2004. CDOM distribution and CO₂ production on the Southwest Florida Shelf. Mar. Chem. 89(1-4): 145-167

Stabenau, Erik and Rod G. Zika. 2004Correlation of the Absorption Coefficient with a Reduction in Mean Mass for Dissolved Organic Matter in Southwest Florida River Plumes. Mar. Chem. 89(1-4): 55-67.

Zanardi-Lamardo, Eliete, Cynthia A. Moore and Rod G. Zika. 2004. Seasonal variation in Molecular Mass and Optical Properties of Chromophoric Dissolved Organic Material in Coastal Waters of Southwest Florida. Mar. Chem. 89(1-4) 37-54.

Stabenau, Erik R.,  Richard G. Zepp, Erich Bartels, and Rod G. Zika. 2004  Role of seagrass (Thalassia testudinum) as a  source of chromophoric dissolved organic matter in coastal south Florida. Mar. Ecol. Progr. Ser.  282: 59-72