Publications by KCCAMS researchers:

• Affek H.P., Xu X. and Eiler J.M. (2007) Seasonal and diurnal variations of 13C18O16O in air: Initial observations from Pasadena , CA. Geochim. Cosmochim. Acta (71) 5033-5043.

• Beaupre, Steven R., Ellen R. M. Druffel and Sheila Griffin (2007) A low-blank photochemical extraction system for concentration and isotopic analyses of marine dissolved organic carbon, Limnology and Oceanography: Methods 5, 174-184.

• Beaupré, S. and Aluwihare, L., 2009. Constraining the 2-component model of marine dissolved organic radiocarbon. Deep Sea Research, in revision.

• Beaupré, S. and Druffel, E., 2009. Constraining the propagation of bomb-radiocarbon through the dissolved organic carbon (DOC) pool in the northeast Pacific Ocean . Deep-Sea Research, 56(10), 1717-1726 .

• Borken, W., K. Savage, E. A. Davidson, and S. E. Trumbore (2006), Effects of experimental drought on soil respiration and radiocarbon efflux from a temperate forest soil, Global Change Biol., 12, 177-193.

• Brando P.M., D.C. Nepstad, E. A. Davidson, S. E. Trumbore, D. Ray and P. Camargo. (2008) Drought effects on litterfall, wood production and belowground carbon cycling in an Amazon forest: results of a throughfall reduction experiment, Phil. Trans. Royal Society B, 363 (1498): 1839-1848.

• Carbone, M. S., C. I. Czimczik, K. E. McDuffee, and S. E. Trumbore (2007), Allocation and residence time of photosynthetic products in a boreal forest using a low-level C-14 pulse-chase labeling technique, Global Change Biol., 13, 466-477. Click here for PDF file.

• Carbone, M. S., G. C. Winston, and S. E. Trumbore (2008), Soil respiration in perennial grass and shrub ecosystems: Linking environmental controls with plant and microbial sources on seasonal and diel timescales, J. Geophys. Res., 113, G02022, doi:10.1029/2007JG000611.

• Castanha C., S. Trumbore and R. Amundson (2008) Methods of separating soil carbon pools affect the chemistry and turnover time of isolated fractions. Radiocarbon 50: 83-97.

• Cisneros-Dozal, L. M., S. Trumbore, and P. J. Hanson (2006), Partitioning sources of soil-respired CO2 and their seasonal variation using a unique radiocarbon tracer, Global Change Biol., 12, 194-204.

• Cisneros-Dozal, L. M., S. E. Trumbore, and P. J. Hanson (2007), Effect of moisture on leaf litter decomposition and its contribution to soil respiration in a temperate forest, Journal of Geophysical Research-Biogeosciences, 112, G01013.

• Culleton, B. J., D. J. Kennett, B. L. Ingram, J. M. Erlandson, and J. R. Southon (2006), Intrashell radiocarbon variability in marine mollusks, Radiocarbon, 48, 387-400.

• Czimczik, C. I., K. K. Treseder, M. S. Carbone, and S. E. Trumbore (2005), Radiocarbon - a low-impact tool to study nutrient transport by soil fungi under field conditions, New Phytol., 166, 595-600. Click here for PDF file.

• Czimczik, C. I., S. E. Trumbore, M. S. Carbone, and G. C. Winston (2006), Changing sources of soil respiration with time since fire in a boreal forest, Global Change Biol., 12, 957-971. Click here for PDF file.

• Davidson, E. A., K. E. Savage, S. E. Trumbore, and W. Borken (2006), Vertical partitioning of CO2 production within a temperate forest soil, Global Change Biol., 12, 944-956.

• Drenzek, N.J., K. A. Hughen, D. B. Montluçon, J. R. Southon, G. M. dos Santos, E. R. M. Druffel, L. Giosan, and T. I. Eglinton (2009), A new look at old carbon in active margin sediments, Geology, 37, 239-242.

• Druffel, E.R.M., James E. Bauer, Sheila Griffin, and Jeomshik Hwang (2003), Penetration of Anthropogenic Carbon into Organic Particles of the Deep Ocean, Geophysical Research Letters, 30, 14, 1744, doi:10.1029/2003GL017423.

• Druffel, E. R. M., S. Griffin, J. Hwang, T. Komada, S. R. Beaupre, K. C. Druffel-Rodriguez, G. M. Santos, and J. Southon (2004), Variability of monthly radiocarbon during the 1760s in corals from the Galapagos Islands, Radiocarbon, 46, 627-631.

• Druffel, E. R. M., J. E. Bauer, and S. Griffin (2005), Input of particulate organic and dissolved inorganic carbon from the Amazon to the Atlantic Ocean, Geochemistry Geophysics Geosystems, 6, Q03009.

• Druffel, E. R. M., S. Griffin, S. R. Beaupre, and R. B. Dunbar (2007), Oceanic climate and circulation changes during the past four centuries from radiocarbon in corals, Geophys. Res. Lett., 34, L09601.

• Druffel, E.R.M., LF. Robinson, S. Griffin , R. Halley, J. Southon and J.F. Adkins (2008). Low reservoir ages for the surface ocean from mid-Holocene Florida corals, Paleoceanography, 23, 7pp. doi:10.1029/2007PA001527.

• Druffel, E., Bauer, J., Griffin , S., Beaupré, S. and Hwang, J., 2008. Dissolved inorganic radiocarbon in the North Pacific Ocean and Sargasso Sea . Deep-Sea Research, 55(4): 451-459.

• Druffel, E. and Griffin , S., 2008. Daily variability of dissolved inorganic radiocarbon at three sites in the surface ocean. Marine Chemistry, 110: 185-189.

• Eltgroth, S. F., J. F. Adkins, L. F. Robinson, J. Southon, and M. Kashgarian (2006), A deep-sea coral record of North Atlantic radiocarbon through the Younger Dryas: Evidence for intermediate water, Paleoceanography, 21, PA4207.

• Erlandson, J. M., M. E. Macko, H. C. Koerper, and J. Southon (2005), The antiquity of Olivella shell beads at CA-ORA-64: AMS radiocarbon dated between 9420 and 7780 cal BP, Journal of Archaeological Science, 32, 393-398.

• Fierer, N., O. A. Chadwick, and S. E. Trumbore (2005), Production of CO 2 in soil profiles of a California annual grassland, Ecosystems, 8, 412-429.

• Gaudinski, J. B., T. E. Dawson, S. Quideau, E. A. G. Schuur, J. S. Roden, S. E. Trumbore, D. R. Sandquist, S. W. Oh, and R. E. Wasylishen (2005), Comparative analysis of cellulose preparation techniques for use with C-13, C-14, and O-18 isotopic measurements, Anal. Chem., 77, 7212-7224.

• Gaudinski, J. B., M. S. Torn, W. J. Riley, C. Swanston, S. E. Trumbore, J. D. Joslin, H. Majdi, T. E. Dawson and P. J. Hanson (2009) Use of stored carbon reserves in growth of temperate tree roots and leaf buds: analyses using radiocarbon measurements and modeling. Global Change Biology 15: 992-1014.

• George, D., J. Southon, and R. E. Taylor (2005), Resolving an anomolous radiocarbon determination on mastodon bone from Monte Verde, Chile, American Antiquity, 70, 766-772.

• Godoy, M.L.D.P., J.M. Godoy, R. Kowsmann, G.M. dos Santos and R.P. da Cruz (2006) 234U and 230Th Determination by FI-ICP-MS and application to Uranium-series disequilibrium in marine samples, Journal of Environmental Radioactivity 88(2): 109-117.

• Gorbarenko, S. A., I. A. Basov, M. P. Chekhovskaya, J. Southon, T. A. Khusid, and A. Artemova (2005), Orbital and millennium scale environmental changes in the southern Bering Sea during the last glacial-Holocene: Geochemical and paleontological evidence, Deep-Sea Research Part Ii-Topical Studies in Oceanography, 52, 2174-2185.

• Gorbarenko, S. A., J. R. Southon, L. D. Keigwin, M. V. Cherepanova, and I. G. Gvozdeva (2004), Late Pleistocene-Holocene oceanographic variability in the Okhotsk Sea: geochemical, lithological and paleontological evidence, Palaeogeography Palaeoclimatology Palaeoecology, 209, 281-301.

• Grottoli, A. G., S. T. Gille, E. R. M. Druffel, and R. B. Dunbar (2003), Decadal timescale shift in the C-14 record of a central equatorial Pacific coral, Radiocarbon, 45, 91-99.

• Guilderson, T. P., J. E. Cole, and J. R. Southon (2005), Pre-bomb Delta C-14 variability and the suess effect in Cariaco Basin surface waters as recorded in hermatypic corals, Radiocarbon, 47, 57-65.

• Hansman, R. S. Griffin, J. Watson, E. Druffel, A. Ingalls, A. Pearson, and A. Aluwihare, (2009). The radiocarbon signature of microorganisms in the mesopelagic ocean, Proceedings of the National Academy of Science 106, 6513–6518 .

• Hinger, E.N., Guaciara M. Santos, Ellen R.M. Druffel, and Sheila Griffin. Carbon Isotope Measurements of Surface Seawater from a Time-Series Site off Southern California, Radiocarbon 52(1), in press.

• Hsueh, D. Y., N. Y. Krakauer, J. T. Randerson, X. M. Xu, S. E. Trumbore, and J. R. Southon (2007), Regional patterns of radiocarbon and fossil fuel-derived CO2 in surface air across North America, Geophys. Res. Lett., 34, L02816.

• Hughen, K., S. Lehman, J. Southon, J. Overpeck, O. Marchal, C. Herring, and J. Turnbull (2004), C-14 activity and global carbon cycle changes over the past 50,000 years, Science, 303, 202-207.

• Hughen, K. A. et al. (2004), Marine04 marine radiocarbon age calibration, 0-26 cal kyr BP, Radiocarbon, 46, 1059-1086.

• Hughen, K. A., J. R. Southon, C. J. H. Bertrand, B. Frantz, and P. Zermeno (2004), Cariaco basin calibration update: Revisions to calendar and C-14 chronologies for core PL07-58PC, Radiocarbon, 46, 1161-1187.

• Hughen, K., J. Southon, S. Lehman, C. Bertrand, and J. Turnbull (2006), Marine-derived C-14 calibration and activity record for the past 50,000 years updated from the Cariaco Basin, Quaternary Science Reviews, 25, 3216-3227.

• Hwang, J., E. R. M. Druffel, S. Griffin, K. L. Smith, R. J. Baldwin, and J. E. Bauer (2004), Temporal variability of Delta C-14, delta C-13, and C, Global Biogeochem. Cycles, 18, GB4015. Click here for PDF file. 

• Hwang, J., E. R. M. Druffel, and T. Komada (2005), Transport of organic carbon from the California coast to the slope region: A study of Delta C-14 and delta C-13 signatures of organic compound classes, Global Biogeochem. Cycles, 19, GB2018. Click here for PDF file.

• Hwang, J. S., E. R. M. Druffel, and J. E. Bauer (2006), Incorporation of aged dissolved organic carbon (DOC) by oceanic particulate organic carbon (POC): An experimental approach using natural carbon isotopes, Mar. Chem., 98, 315-322. Click here for PDF file.

• Hwang, J., E. R. M. Druffel, T. I. Eglinton, and D. J. Repeta (2006), Source(s) and cycling of the nonhydrolyzable organic fraction of oceanic particles, Geochim. Cosmochim. Acta, 70, 5162-5168. Click here for PDF file.

• Ingalls, A. E., S. R. Shah, R. L. Hansman, L. I. Aluwihare, G. M. Santos, E. R. M. Druffel, and A. Pearson (2006), Quantifying archaeal community autotrophy in the mesopelagic ocean using natural radiocarbon, Proc. Natl. Acad. Sci. U. S. A., 103, 6442-6447.

• Kennett, D., A. Anderson, M. Prebble, E. Conte, and J. Southon (2006), Prehistoric human impacts on Rapa, French Polynesia, Antiquity, 80, 340-354.

• Kessler, J. D., W. S. Reeburgh, J. Southon, R. Seifert, W. Michaelis, and S. C. Tyler (2006), Basin-wide estimates of the input of methane from seeps and clathrates to the Black Sea, Earth Planet. Sci. Lett., 243, 366-375.

• Kessler, J. D., W. S. Reeburgh, J. Southon, and R. Varela (2005), Fossil methane source dominates Cariaco Basin water column methane geochemistry, Geophys. Res. Lett., 32, L12609.

• Khosh M.S., Xu X. and Trumbore S.E. (2009) Small-mass Graphite Preparation by Sealed Tube Zinc Reduction Method for AMS 14C Measurements. Nucl. Instr. and Meth. in Phys. Res. (in press).

• Komada, T., E. R. M. Druffel, and S. E. Trumbore (2003), Sources, composition, and fate of suspended particulate organic carbon of a small mountainous river., Abstracts of Papers of the American Chemical Society, 225, U930-U930.

• Komada, T., E. R. M. Druffel, and S. E. Trumbore (2004), Oceanic export of relict carbon by small mountainous rivers, Geophys. Res. Lett., 31, L07504.

• Komada, T., E. R. M. Druffel, and J. Hwang (2005), Sedimentary rocks as sources of ancient organic carbon to the ocean: An investigation through Delta C-14 and delta C-13 signatures of organic compound classes, Global Biogeochem. Cycles, 19, GB2017. Click here for PDF file. 

• Kueppers, L. M., J. Southon, P. Baer, and J. Harte (2004), Dead wood biomass and turnover time, measured by radiocarbon, along a subalpine elevation gradient, Oecologia, 141, 641-651.

• Laguens, A.G., M. Fabra, G.M. Santos and D.A. Demarchi (2009) Palaeodietary Inferences Based on Isotopic Data for Pre-Hispanic Populations of the Central Mountains of Argentina, International Journal of Osteoarchaeology 19: 237–249.

• Li H.-C., Xu X., Ku T.-L., You C.-F., Buchheim H.P. and Peters R. (2008) Isotopic and geochemical evidence of paleoclimate changes in Salton Basin , California during the past 20 Kyrs: 1. δ18O and δ13C records in Lake Tufa deposits. Paleogeography, Palaeoclimatology, Palaeoecology. 259(2-3), 182-197.

• Li H.-C., You C.-F., Ku T.-L., Xu X., Buchheim H.P., Wan N.-J., Wang R.-M. and Shen M.-L. (2008) Isotopic and geochemical evidence of paleoclimate changes in Salton Basin , California during the past 20 Kyrs: 2. 87Sr/86Sr ratio in Lake Tufa deposits as a tracer of water sources. Paleogeography, Palaeoclimatology, Palaeoecology. 259(2-3), 198-212.

• Lindahl, B. D., K. Ihrmark, J. Boberg, S. E. Trumbore, P. Hogberg, J. Stenlid, and R. D. Finlay (2007), Spatial separation of litter decomposition and mycorrhizal nitrogen uptake in a boreal forest, New Phytol., 173, 611-620.

• Mangini, A., J.M. Godoy, M.L. Godoy, R. Kowsmann, G.M. Santos, M. Ruckelshausen, A. Schroeder-Ritzrau, L. Wacker. Deep sea corals off Brazil verify a poorly ventilated Southern Pacific Ocean during H2, H1 and the Younger Dryas, Submitted to EPSL.

• Masiello, C. A. and E. R. M. Druffel (2003), Organic and black carbon C-13 and C-14 through the Santa Monica Basin sediment oxic-anoxic transition, Geophys. Res. Lett., 30, 1185.

• McKay, J. L., T. F. Pedersen, and J. Southon (2005), Intensification of the oxygen minimum zone in the northeast Pacific off Vancouver Island during the last deglaciation: Ventilation and, Paleoceanography, 20, PA4002.

• Muscheler, R., B.Kromer, S. Bjorck , A. Svensson, M.Friedrich, K.F.Kaiser, J.Southon, (2008), Tree rings and ice cores reveal 14C calibration uncertainties during the Younger Dryas, Nature Geoscience 1: 263-267.

• Nowinski , N.S. , S. E. Trumbore, E.A.G. Schuur, M. C. Mack, G. R. Shaver (2008). Nutrient addition prompts rapid destabilization of organic matter in an arctic tundra ecosystem, Ecosystems, 11(1), 16-25.

• Nowinski, N.S, S.E. Trumbore, G. Jiminez and M. Fenn (2009) Alteration of belowground carbon dynamics by nitrogen addition in southern California mixed conifer forests. J. Geophys. Res. B 114 doi:10.1029/2008JG000801.

• Reimer, P. J. et al. (2004), IntCal04 terrestrial radiocarbon age calibration, 0-26 cal kyr BP, Radiocarbon, 46, 1029-1058.

• Reimer, P. J. et al. (2006), Comment on "Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired Th-230/U-234, Quaternary Science Reviews, 25, 855-862.

• Roberts, M.L., J.R.Southon. A preliminary determination of the absolute 14C/ 12C ratio of OX-1, Radiocarbon 49 (2007) 441-446.

• Robinson, L. F., J. F. Adkins, L. D. Keigwin, J. Southon, D. P. Fernandez, S. L. Wang, and D. S. Scheirer (2005), Radiocarbon variability in the western North Atlantic during the last deglaciation, Science, 310, 1469-1473.

• Santos, G.M., J. R. Southon, K. C. Druffel-Rodriguez, S. Griffin, and M. Mazon (2004), Magnesium perchlorate as an alternative water trap in AMS graphite sample preparation: A report on sample preparation at KCCAMS at the University of California, Irvine, Radiocarbon, 46, 165-173. Click here for PDF file.

• Santos, G.M., M. Fabra, A. Laguens, D. Demarchi, J.R. Southon, R.E. Taylor and D. George. 14C-AMS as a tool for archaeological investigation: Implications for Human Settlement in South America (2006) Invited paper for: "The peopling of the Americas " International Symposium, December 16 to 22, 2006 at the Capivara National Park, Piaui, Brazil. Click here for PDF file.

• Santos, G.M., J. Southon, S. Griffin , S.R. Beaupre and E.R. Druffel (2007a) Ultra small-mass 14C-AMS sample preparation and analysis at the KCCAMS Faclitity, Nuclear Instruments and Methods in Physics Research B (259): 293-302.

• Santos, G.M., M. Mazon, J. Southon, S. Rifai and R.B. Moore (2007b) Evaluation of iron and cobalt powder brands as suitable catalysts for 14C-AMS target preparation, Nuclear Instruments and Methods in Physics Research B (259): 308-315.

• Santos, G.M., R.B. Moore, J.R. Southon, S. Griffin, E. Hinger and D. Zhang (2007c) AMS 14C sample preparation at the KCCAMS/UCI Facility: status report and performance of small samples. Radiocarbon, 49(2), 255-269. Click here for PDF file.

• Santos, G.M. (2009) Comment on Atmospheric carbon isotope signatures in phytolith occluded carbon, Carter, J.A., Quaternary International, this volume (Forum Comment), Perspectives on Phytolith Research: 6th International Meeting on Phytolith Research, Quaternary International 193 (1-2):30-31.

• Santos, G.M., Anne Alexandre, Heloisa H.G. Coe, Paul E. Reyerson, John R. Southon, Cacilda N. De Carvalho. The Phytolith C puzzle: a tale of background determinations and accuracy tests, Radiocarbon 52(1), in press.

• Santos, G.M., John R. Southon, Nicholas J. Drenzek, Lori A. Ziolkowski, Ellen Druffel, Xaiomei Xu, Dachun Zhang, Susan Trumbore, Timothy I. Eglinton and Konrad A. Hughen. Blank assessment for ultra-small samples: chemical extraction and separation vs. AMS, Radiocarbon (accepted) .

• Southon, J. (2004), A radiocarbon perspective on Greenland ice-core chronologies: Can we use ice cores for C-14 calibration?, Radiocarbon, 46, 1239-1259.

• Southon, J. and G. M.Santos (2004) Life with MC-SNICS: Ion source development at the Keck AMS facility, submitted to the Proceedings of the Symposium of North Eastern Accelerator Personnel (SNEAP 2004), McMaster University, Hamilton, Canada.

• Southon, J., G. Santos, K. Druffel-Rodriguez, E. Druffel, S. Trumbore, X. M. Xu, S. Griffin, S. Ali, and M. Mazon (2004), The Keck Carbon Cycle AMS laboratory, University of California, Irvine: Initial operation and a background surprise, Radiocarbon, 46, 41-49. Click here for PDF file.

• Southon, J.R. and G.M. Santos (2004), Ion source development at KCCAMS, University of California, Irvine, Radiocarbon, 46, 33-39. Click here for PDF file.

• Southon, J.R., G.M. Santos, E.R. Druffel, S. Griffin, S. Trumbore and X. Xu (2005) High throughput, high precision 14C AMS with small accelerator. International Symposium on Utilisation of Accelerators, Dubrovnik, Croatia, 05-09 June 2005. Sponsor: IAEA Manuscript submitted. Click here for PDF file.

• Southon, J.R. and G.M. Santos (2007) Life with MC-SNICS Part II: recent ion source development at the Keck Carbon Cycle AMS Facility, Nuclear Instruments and Methods in Physics Research B (259): 88-93

• Southon, J.R. (2007) Graphite reactor memory - where is it from and how to minimize it? Nuclear Instruments and Methods in Physics Research B 259: 288-292.

• Southon, J.R., G.M. Santos and B. Han (2007) Cs feed tests and emittance measurements on a modified MC-SNICS Ion Source for radiocarbon AMS. Radiocarbon, 49(2), 301-305. Click here for PDF file.

• Stott, L. , J. Southon, A. Timmermann, A. Koutavas. Radiocarbon age anomaly at intermediate water depth in the Pacific Ocean during the last deglaciation, Paleoceanography 24 (2009) PA2223.

• Swanston, C. W., M. S. Torn, P. J. Hanson, J. R. Southon, C. T. Garten, E. M. Hanlon, and L. Ganio (2005), Initial characterization of processes of soil carbon stabilization using forest stand-level radiocarbon enrichment, Geoderma, 128, 52-62.

• Taylor, R. E. and J. Southon (2006), Problems in the calibration of the radiocarbon time scale: Archaeological implications, Abstracts of Papers of the American Chemical Society, 231.

• Taylor, R.E. and J. Southon (2007) Use of natural diamonds to monitor 14C AMS instrument backgrounds , Nuclear Instruments and Methods in Physics Research Section B 259: 282.

• Taylor, R.E., J.Southon, M. Des Lauriers (2007). Holocene Marine Reservoir Time Series ∆R values from Cedros Island , Baja California . Radiocarbon 49: 899-904.

• Torn, M. S., P. M. Vitousek, and S. E. Trumbore (2005), The influence of nutrient availability on soil organic matter turnover estimated by incubations and radiocarbon modeling, Ecosystems, 8, 352-372.

• Torn, M.S., C.W. Swanston, C. Castanha, S.E. Trumbore. Storage and turnover of natural organic matter in soil. (2009) In: IUPAC Series on Biophysico-chemical Processes in Environmental Systems; Volume 2-Biophysico-chemical processes involving natural nonliving organic matter in environmental systems. Series Editors: P. M. Huang and N. Senesi.

• Treseder, K. K., C. Czimczik, S. Trumbore and S. Allison (2008) Uptake of an amino acid by ectomycorrhizal fungi in a boreal forest. Soil Biology and Biochemistry 40: 1964-1966.

• Trumbore, S. (2006), Carbon respired by terrestrial ecosystems - recent progress and challenges, Global Change Biol., 12, 141-153.

• Trumbore, S., E. S. Da Costa, D. C. Nepstad, P. B. De Camargo, L. I. Z. A. Martinelli, D. Ray, T. Restom, and W. Silver (2006), Dynamics of fine root carbon in Amazonian tropical ecosystems and the contribution of roots to soil respiration, Global Change Biol., 12, 217-229.

• Trumbore SE. Radiocarbon and Soil Carbon Dynamics (2009). Annu. Rev. Earth Planet. Sci. 37: 47–66.

• Trumbore, SE and C. Czimczik (2008) An uncertain future for soil carbon. Science (Perspective) v. 321: 1455-1456.

• Turnbull, J. C., J. B. Miller, S. J. Lehman, P. P. Tans, R. J. Sparks, and J. Southon (2006), Comparison of (CO2)-C-14, CO, and SF6 as tracers for recently added fossil fuel CO2 in the atmosphere and implications for biological CO2 exchange, Geophys. Res. Lett., 33 , L01817.

• van der Plicht, J. et al. (2004), NotCal04 - Comparison, Radiocarbon, 46, 1225-1238.

• Vargas, R. SE Trumbore and MF Allen (2009). Evidence of old carbon used to grow new fine roots in a tropical forest. New Phytologist 182: 710-718.

• Vieira, S., S. Trumbore, P. B. Camargo, D. Selhorst, J. Q. Chambers, N. Higuchi, and L. A. Martinelli (2005), Slow growth rates of Amazonian trees: Consequences for carbon cycling, Proc. Natl. Acad. Sci. U. S. A., 102, 18502-18507.

• Xu, X. , S.E. Trumbore, S. Zheng, J.R. Southon, K.E. McDuffee, M. Luttgen and J.C. Liu (2007) Modifying A Sealed Tube Zinc Reduction Method for Preparation of AMS Graphite Targets: Reducing Background and Attaining High Precision, Nuclear Instruments and Methods in Physics Research B 259: 320-329.

• Ziolkowski, L. and E.R.M. Druffel, (2009). Detection of carbon nanotubes using the benzene polycarboxylic acid method, Marine Pollution Bulletin 59, 126–131.