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Publications (updated 3/6/08)



  1. 1988 Karl, D. NSF-sponsored symposium on Dissertations in Chemical Oceanography, "Research opportunities in Hawaiian waters", Honolulu, Hawaii, November 1988.

  2. 1988 Karl, D. NSF/GOFS-sponsored workshop on sediment traps, "Determination of total C, N, P flux" and "Screens: A potential solution to the problem of swimmers", Gulf Coast Research Laboratory, Mississippi, November 1988.

  3. 1989 Winn, C. D., S. Chiswell, D. M. Karl and R. Lukas. Long time-series research in the Central Pacific Ocean. The Oceanography Society 1st Annual Meeting, Monterey, California.

  4. 1990 Karl, D., R. Letelier, D. Bird, D. Hebel, C. Sabine and C. Winn. An Oscillatoria bloom in the oligotrophic North Pacific Ocean near the GOFS station ALOHA. EOS, Transactions of the American Geophysical Union 71, 177-178.

  5. 1990 Winn, C. D., D. Hebel, R. Letelier, D. Bird and D. Karl. Variability in biogeochemical fluxes in the oligotrophic central Pacific: Results of the Hawaii Ocean Time- Series Program. EOS, Transactions of the American Geophysical Union 71, 190.

  6. 1990 Chiswell, S. M. and R. Lukas. The Hawaii Ocean Time-series (HOT). EOS, Transactions of the American Geophysical Union 71, 1397.

  7. 1990 Karl, D. "JGOFS time-series programs," San Francisco, California, December 1990.

  8. 1991 Winn, C., C. Sabine, D. Hebel, F. Mackenzie and D. M. Karl. Inorganic carbon system dynamics in the central Pacific Ocean: Results of the Hawaii Ocean Time-series program. EOS, Transactions of the American Geophysical Union 72, 70.

  9. 1991 Lukas, R. Water mass variability observed in the Hawaii Ocean Time Series. EOS, Transactions of the American Geophysical Union 72, 70.

  10. 1991 Letelier, R., D. Karl, R. Bidigare, J. Christian, J. Dore, D. Hebel and C. Winn. Temporal variability of phytoplankton pigments at the U.S.-JGOFS station ALOHA (22 45'N, 158 W). EOS, Transactions of the American Geophysical Union 72, 74.

  11. 1991 Karl, D. "The Hawaii Ocean Time-series program: Carbon production and particle flux", The Oceanography Society 2nd Annual Meeting, St. Petersburg, Florida, March 1991.

  12. 1991 Karl, D. NATO symposium on Biology and Ecology of Diazotrophic Marine Organisms, "Trichodesmium blooms and new nitrogen in the North Pacific gyre", Bamberg, Germany, May 1991.

  13. 1992 Anbar, A. D. Rhenium in seawater: Confirmation of generally conservative behavior. EOS, Transactions of the American Geophysical Union 73, 278.

  14. 1992 Schudlich, R. and S. R. Emerson. Modelling dissolved gases in the subtropical upper ocean: JGOFS/WOCE Hawaiian Ocean Time-series. EOS, Transactions of the American Geophysical Union 73, 287.

  15. 1992 Tupas, L. M., B. N. Popp and D. M. Karl. Dissolved organic carbon in oligotrophic waters: experiments on sample preservation, storage and analysis. EOS, Transactions of the American Geophysical Union 73, 287.

  16. 1992 Karl, D., C. Winn, D. Hebel, R. Letelier, J. Dore and J. Christian. The U.S.- JGOFS Hawaii Ocean Time-Series (HOT) program. American Society for Limnology and Oceanography Aquatic Sciences Meeting, Santa Fe, NM, February 1992.

  17. 1992 Campbell, L., R. R. Bidigare, R. Letelier, M. Ondrusek, S. Hall, B. Tsai and C. Winn. Phytoplankton population structure at the Hawaii Ocean Time-series station. American Society for Limnology and Oceanography Aquatic Sciences Meeting, Santa Fe, NM, February 1992.

  18. 1992 Karl, D. NSF-sponsored GLOBEC scientific steering committee meeting, "Hawaii Ocean Time-series (HOT) program: A GLOBEC 'Blue Water' initiative", Honolulu, Hawaii, March 1992.

  19. 1992 Karl, D. IGBP International Symposium on Global Change, "Oceanic ecosystem variability: Initial results from the JGOFS Hawaii Ocean Time-series (HOT) experiment", Tokyo, Japan, March 1992.

  20. 1992 Karl, D. Conoco HOT Topics Seminar Series, "The U.S.-JGOFS Hawaii Ocean Time- Series (HOT) Program: Biogeochemical Vignettes from the Oligotrophic North Pacific Ocean" and "Temporal Variability in Bioelement Flux at Station ALOHA (22 45'N, 158 W)", Woods Hole, Massachusetts, May 1992

  21. 1992 Bidigare, R. R., L. Campbell, M. Ondrusek, R. Letelier and D. Vaulot. Characterization of picophytoplankton at Station ALOHA (22 45'N, 158 W) using HPLC, flow cytometry and immunofluorescence techniques. PACON 1992 Meeting, June 1992.

  22. 1992 Winn, C. D., D. Hebel, R. Letelier, J. Christian, J. Dore, R. Lukas and D. M. Karl. Long time-series measurements in the central North Pacific: Results of the Hawaii Ocean Time-series program. PACON conference, Kona, Hawaii, June 1992.

  23. 1993 Atkinson, M. J. A potentiometric solid state sensor for oceanic CTDs, Abstract of The Oceanography Society Annual Meeting, Seattle, Washington, April 1993.

  24. 1993 Campbell, L., H. A. Nolla and D. Vaulot. Microbial biomass in the subtropical central North Pacific Ocean (Station ALOHA): The importance of Prochlorococcus, Abstract of The Oceanography Society Annual Meeting, Seattle, Washington, April 1993.

  25. 1993 Emerson, S., P. Quay, C. Stump, D. Wilbur and R. Schudlich. Oxygen cycles and productivity in the oligotrophic subtropical Pacific Ocean. Abstract of of the Oceanography SocietyAnnual Meeting, Seattle, Washington, April 1993.

  26. 1993 Sharp, J. H., R. Benner, L. Bennett, C. A. Carlson, S. E. Fitzwater, E. T. Peltzer, and L. Tupas. Dissolved organic carbon: Intercalibration of analyses with equatorial Pacific samples. Abstract of The Oceanography Society Annual Meeting, Seattle, Washington, April 1993.

  27. 1993 Winn, C. D., C. J. Carrillo, F. T. Mackenzie and D. M. Karl. Variability in the inorganic carbon system parameters in the North Pacific subtropical gyre. Abstract of The Oceanography Society Annual Meeting, Seattle, Washington, April 1993.

  28. 1993 Yanagi, K. and D. M. Karl. Note on the fractional determination of TDP in seawater by an UV-irradiation method combined with the MAGIC procedure. Abstract of the Oceanography Society of Japan annual meeting, Tokyo, Japan, April 1993.

  29. 1993 Campbell, L., H. Liu, R. R. Bidigare and D. Vaulot. Immunochemical characterization of Prochlorococcus. Abstract of the American Society of Limnology and Oceanography 1993 Annual Meeting, Edmonton, Alberta, Canada, May 1993.

  30. 1993 Christian, J. R. and D. M. Karl. Bacterial exoenzymes in marine waters: Implications for global biogeochemical cycles. Abstract of the American Society of Limnology and Oceanography 1993 Annual Meeting, Edmonton, Alberta, Canada, May 1993.

  31. 1993 Moyer, C. L., L. Campbell, D. M. Karl and J. Wilcox. Restriction fragment length polymorphism (RFLP) and DNA sequence analysis of PCR-generated clones to assess diversity of picoeukaryotic algae in the subtropical central North Pacific Ocean (Station ALOHA). Abstract of the American Society of Limnology and Oceanography 1993 Annual Meeting, Edmonton, Alberta, Canada, May 1993.

  32. 1993 Sharp, J. H., R. Benner, L. Bennett, C. A. Carlson, S. E. Fitzwater and L. Tupas. The equatorial Pacific intercalibration analyses of dissolved organic carbon in seawater. Abstract of the American Society of Limnology and Oceanography 1993 Annual Meeting, Edmonton, Alberta, Canada, May 1993.

  33. 1994 Yuan, J., C. I. Measures and J. A. Resing. Rapid determination of iron in seawater: In-line preconcentration flow injection analysis with spectrophotometric detection. EOS, Transactions of the American Geophysical Union 75, 25.

  34. 1994 Smith, C. R., S. Garner, D. Hoover and R. Pope. Macrobenthos, mechanisms of bioturbation and carbon flux proxies at the abyssal seafloor along the JGOFS Equatorial Pacific Transect. EOS, Transactions of the American Geophysical Union 75, 70.

  35. 1994 Farrenkopf, A. M., G. W. Luther, III and C. H. Van Der Weijden. Vertical distribution of dissolved iodine species in the northwest Indian Ocean. EOS, Transactions of the American Geophysical Union 75, 78.

  36. 1994 Campbell, L., C. D. Winn, R. Letelier, D. Hebel and D. M. Karl. Temporal variability in phytoplankton fluorescence at Station ALOHA. EOS, Transactions of the American Geophysical Union 75, 100.

  37. 1994 Winn, C., F. T. Mackenzie, C. Carrillo, T. Westby and D. M. Karl. Air-sea carbon dioxide exchange at Station ALOHA. EOS, Transactions of the American Geophysical Union 75, 112.

  38. 1994 Lukas, R., F. Bingham and A. Mantyla. An anomalous cold event in the bottom water observed north of Oahu. EOS, Transactions of the American Geophysical Union 75, 205.

  39. 1994 Tupas, L. M., B. N. Popp and D. M. Karl. Dissolved organic carbon in oligotrophic waters; experiments on sample preservation, storage and analysis. EOS, Transactions of the American Geophysical Union 75, 287.

  40. 1994 Bingham, F.M. Drifter observations of the North Hawaiian Ridge Current. EOS, Transactions of the American Geophysical Union 75, 307.

  41. 1994 HOT Program P.I.s, staff and students. The Hawaii Ocean Time-series (HOT) program: The first five years, p. 59. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  42. 1994 HOT Program P.I.s, staff and students. HOT: a time-series study of carbon cycling in the oligotrophic North Pacific, p. 24. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  43. 1994 Bidigare, R. R., L. Campbell, M. E. Ondrusek, R. Letelier, D. Vaulot and D. M. Karl. Phytoplankton community structure at station ALOHA (22 45'N, 158 W) during fall 1991, p. 58. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  44. 1994 Bingham, F. M. and B. Qiu. Interannual varibility of surface and mixed layer properties observed in the Hawaii Ocean Time-series, p. 89. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  45. 1994 Bingham, F. M. and R. Lukas. Seasonal cycles of temperature, salinity and dissolved oxygen observed in the Hawaii Ocean Time-series, p. 90. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  46. 1994 Christian, J. Vertical fluxes of carbon and nitrogen at Station ALOHA, p. 61. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  47. 1994 Dore, J. E. and D. M. Karl. Nitrite distributions and dynamics at Station ALOHA, p. 60. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  48. 1994 Firing, E. Currents observed north of Oahu during the first five years of HOT, p. 90. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  49. 1994 Fujieki, L. A., D. V. Hebel, L. M. Tupas and D. M. Karl. Hawaii Ocean Time-series Data Organization and Graphical System (HOT-DOGS), p. 61. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  50. 1994 Hebel, D. V., F. P. Chavez, K. R. Buck, R. R. Bidigare, D. M. Karl, M. Latasa, M. E. Ondrusek, L. Campbell and J. Newton. Do GF/F filters underestimate particulate chlorophyll a and primary production in the oligotrophic ocean?, p. 62. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  51. 1994 Houlihan, T., J. E. Dore, L. Tupas, D. V. Hebel, G. Tien and D. M. Karl. Freezing as a method of preservation for seawater dissolved nutrient and organic carbon samples, p. 62. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  52. 1994 Kennan, S. C. and R. Lukas. Saline intrusions in the intermediate waters north of Oahu, p. 91. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  53. 1994 Letelier, R. M., J. Dore, C. D. Winn and D. M. Karl. Temporal variations in photosynthetic carbon assimilation efficiencies at Station ALOHA (22 45'N; 158 00'W), p. 60. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  54. 1994 Liu, H. and L. Campbell. Growth and grazing rates of Prochlorococcus and Synechococcus at Station ALOHA measured by the selective inhibitor technique, p. 59. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  55. 1994 Lukas, R. Interannual variability of Pacific deep and bottom waters observed in the Hawaii Ocean Time-series, p. 91. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  56. 1994 Lukas, R., F. Bingham and E. Firing. Seasonal-to-interannual variability observed in the Hawaii Ocean Time-series, p. 28. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  57. 1994 Tupas, L. M., B. N. Popp, D. V. Hebel, G. Tien and D. M. Karl. Dissolved organic carbon measurements at Station ALOHA measured by high temperature catalytic oxidation: Characteristics and variation in the water column, p. 63. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  58. 1994 Winn, C. D., F. T. Mackenzie, C. Carrillo and D. M. Karl. Air-sea carbon dioxide exchange at Station ALOHA, p. 58. Abstract of The Oceanography Society Pacific Basin Meeting, Honolulu, Hawaii, July 1994.

  59. 1994 Liu, H. and L. Campbell. Measurement of growth and mortality rate of Prochloroccus and Synechococcus at Station ALOHA using a new selective inhibitor technique. Fifth International Phycological Congress, Qingdao, China, July 1994.

  60. 1994 Winn, C., F. T. Mackenzie, C. Carrillo, T. Westby and D. M. Karl. Air-sea carbon dioxide exchange at Station ALOHA, p. 112. Abstract of the American Society of Limnology and Oceanography 1994 Ocean Sciences Meeting, San Diego, California.

  61. 1994 Measures, C. I., J. Yuan and J. A. Resing. The rapid determination of iron in seawater at sub-nanomolar concentrations using in-line preconcentration and spectrophotometric detection. Sixth Winter Conference on Flow Injection Analysis, San Diego, CA.

  62. 1994 Measures, C.I., J. Yuan and J. A. Resing. Determination of iron in seawater using in-line preconcentration and spectrophotometric detection. Workshop on Iron Speciation and its Biological Activity, Bermuda Biological Station for Research, Bermuda.

  63. 1995 Cortés, M. Y. and H. R. Thierstein. Coccolithophore dynamics during 1994 at the JGOFS time series Station ALOHA, Hawaii. 5th International Conference on Paleoceanography, Halifax, Canada, Abstract, p. 121.

  64. 1995 Campos, M. L. A. M., T. D. Jickells, A. M. Farrenkopf and G. W. Luther, III. A comparison of dissolved iodine cycling at the Bermuda Atlantic Time Series station and Hawaii Ocean Time-series station. EOS, Transactions of the American Geophysical Union 76, S175.

  65. 1995 Yuan, J. Collecting iron samples from well mounted on CTD rosette. EOS, Transactions of the American Geophysical Union 76, S175.

  66. 1995 Michaels, A. F., D. Karl and A. H. Knap. Insights on ocean variability from the JGOFS time-series stations. Invited plenary lecture, The Oceanography Society Biennial Meeting, April 1995.

  67. 1995 Emerson, S., P. Quay, L. Tupas and D. Karl. Chemical tracers of productivity and respiration in the upper ocean at U.S. JGOFS station ALOHA, 10th Anniversary JGOFS Science Conference, Villefranche, France, May 1995.

  68. 1995 Michaels, A. F., D. Karl and A. H. Knap. Insights on ocean variability from the JGOFS time-series stations. Invited lecture, 10th Anniversary JGOFS Science Conference, Villefranche, France, May 1995.

  69. 1995 Karl, D. M. Oceanic carbon cycle and global environmental change: A microbiological perspective. Invited plenary talk, 7th International Symposium on Microbial Ecology, Santos, Brazil, August 1995.

  70. 1995 Winn, C., D. Sadler and D. M. Karl. Carbon dioxide dynamics at the Hawaii JGOFS/WOCE time-series station. International Association for the Physical Sciences of the Oceans, Honolulu, Hawaii, August 1995.

  71. 1996 Campbell, L., H. Liu and H. A. Nolla. Picophytoplankton population dynamics at Station ALOHA, p. OS65. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  72. 1996 Christian, J. R., J. E. Dore and D. M. Karl. Mixing and nutrient fluxes at the US- JGOFS Station ALOHA ((22 45'N, 158 00'W), p. OS65. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  73. 1996 Dulaney, T. S. and L. R. Sautter. Sedimentation of planktonic foraminifera: Seasonal changes in shell flux north of Oahu, Hawaii, p. OS85. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  74. 1996 Emerson, S. Chemical tracers of biological processes: O2, Ar and N2 mass balance in the subtropical Pacific at the HOT station, p. OS85. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  75. 1996 Hebel, D. V., D. M. Karl, J. R. Christian, J. E. Dore, R. M. Letelier, L. M. Tupas and C. D. Winn. Seasonal and interannual variability in primary production and particle flux at Station ALOHA, p. OS85. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  76. 1996 Karl, D. M.. Alternation of N and P control of new and export production in the North Pacific gyre: A hypothesis based on the HOT program data set, p. OS86. AGU- ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  77. 1996 Lawson, L. M., E. E. Hofmann and Y. H. Spitz. Time series sampling and data assimilation in a simple marine ecosystem model, p. OS86. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  78. 1996 Lopez, M. D. G., Y. Zhu and M. E. Huntley. Space-time variability of zooplankton-sized particle concentrations at the Hawaii Ocean Time-series station (Station ALOHA), p. OS85. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  79. 1996 Quay, P. D. and H. Anderson. Organic carbon export rates in the subtropical N. Pacific, p. OS85. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  80. 1996 Richman, J. G., R. M. Letelier, M. R. Abbott and D. Pillsbury. Expandable optical mooring test at Station ALOHA (22 45'N; 158 00'W), p. OS64. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  81. 1996 Scharek, R., M. Latasa, D. M. Karl and R. R. Bidigare Diatom abundance and vertical flux at the US-JGOFS/WOCE Station "ALOHA" in the oligotrophic North Pacific gyre, p. OS85. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  82. 1996 Selph, K. E., M. R. Landry, R. J. Miller and H. A. Al-Mutairi. Temporal variability in the mesozooplankton community at ocean Station ALOHA, p. OS85. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  83. 1996 Tersol, V., S. Vink, J. Yuan and C. I. Measures. Variations in iron, aluminium and berylium concentrations in surface waters at Station ALOHA, p. OS65. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  84. 1996 Tupas, L. M., M P. Sampson and D. M. Karl. Stable nitrogen isotopic analysis of sinking particulate matter at the Hawaii Ocean Time-series site, p. OS86. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  85. 1996 Venrick, E. L.. A comparison between the phytoplankton species from Station ALOHA and from the Climax region, p. OS65. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  86. 1996 Winn, C. D. Carbon dioxide dynamics at the Hawaii JGOFS/WOCE time-series station: Annual and interannual variability, p. OS64. AGU-ASLO Ocean Sciences Meeting, San Diego, CA, February 1996.

  87. 1996 Lukas, R. Low-frequency climate signals emerge in the Hawaii Ocean Time-series. WOCE Pacific Workshop. Hyatt Newporter, Newport Beach, CA, 19-23 August 1996.

  88. 1996 Santiago-Mandujano, F. Cold bottom water events observed in the Hawaii Ocean Time-series. WOCE Pacific Workshop. Hyatt Newporter, Newport Beach, CA, 19-23 August 1996.

  89. 1997 Lukas, R. Physical studies at the Hawaii Ocean Time-series (HOT) Station. Ocean Climate Time-Series Workshop. Johns Hopkins University, Baltimore, MD, 18-20 March 1997.

  90. 1997 Bird, D.F., R. Maranger and D.M. Karl. The importance of bacterial consumption by algae to marine systems. ASLO-Aquatic Sciences Meeting, Santa Fe, NM, February 1997.

  91. 1997 Karl, D.M., D.V. Hebel and L.M. Tupas. Biogeochemical studies at the Hawaii Ocean Time- series (HOT) station ALOHA. Joint GCOS GOOS WCRP Ocean Observations Panel for Climate (OOPC), GCOS Report No. 41.

  92. 1998 Letelier, R.M., M.R. Abbott, M.H. Freilich, D.M. Karl, P.J. Flament and R. Lukas. Euphotic zone biogeochemical response to a wind-induced upwelling event in the North Pacific subtropical gyre. AGU-Ocean Sciences Meeting, San Diego, CA, February 1998.

  93. 1998 Letelier, R.M. and D.M. Karl. The US-JGOFS Hawaii ocean Time-series (HOT) Program; What we have learned over the first decade. AGU-Ocean Sciences Meeting, San Diego, CA, February 1998.

  94. 1998 Karl, D. The subtropical North Pacific: New views on an old ocean. Ocean Optics XIV Meeting, Kailua-Kona, HI, November 1998.

  95. 1998 Ondrusek, M.E., R.R. Bidigare, D. M. Karl and K. Waters. Predictive models for estimating rates of primary production in the subtropical North Pacific Ocean. Ocean Optics XIV Meeting, Kailua-Kona, HI, November 1998.

  96. 1999 Karl, D.M., K. Björkman, D. Hebel, T. Houlihan and L. Tupas. Seasonal and interannual variability in C-N-P stoichiometry of dissolved and particulate matter in the subtropical North Pacific Ocean. ASLO Aquatic Sciences meeting, Santa Fe, NM, February 1999.

  97. 1999 Karner, M.B., L.T. Taylor, E.F. DeLong and D.M. Karl. Bacterial and archaeal distributions at the Hawaii Ocean Time-series Station, ALOHA, in the North Pacific Ocean. ASLO Aquatic Sciences meeting, Santa Fe, NM, February 1999.

  98. 1999 Karl, D. M. The subtropical North Pacific: New views on an old ocean. JGOFS North Pacific Workshop & SEATS Planning Meeting, Taipei, Taiwan, March 1999.

  99. 2000 Benitez-Nelson, C. R., D. M. Karl and K. O. Buesseler. 234Th derived carbon export at Station ALOHA. Ocean Sciences Meeting, San Antonio, TX, January 2000.

  100. 2000 Benitez-Nelson, C. R. and D. M. Karl. Phosphorus cycling in the North Pacific gyre. Amirican Geophysical Union Meeting, San Francisco, CA, December 2000.

  101. 2000 Bidigare, R. R., M. E. Ondrusek, M. R. Landry, K. Selph, D. M. Karl and R. Leteleir. Seasonal and interannual variations in phytoplankton community structure at Station ALOHA. JGOFS Open Sciences Conference on Ocean Biogeochemistry: A New Paradigm, Bergen, Norway, April 2000.

  102. 2000 Karl, D. M., D. V. Hebel and L. M. Tupas. Biogeochemical studies at the Hawaii Ocean Time-series (HOT) Station ALOHA. International Symposium on Carbon Cycle in the North Pacific, Nagoya, Japan, February 2000.

  103. 2000 Karl, D. M., S. Emerson, P. J. Harrison, A. F. Michaels and Y. Nojiri. Temporal variability of biogeochemistry. JGOFS Open Science Conference on Ocean Biogeochemistry: A New Paradigm, Bergen, Norway, April 2000.

  104. 2000 Letelier, R. M., M. R. Abbott and D. M. Karl. Nutrient supply into the euphotic zone as a result of the seasonal solar irradiance cycle: Station ALOHA as a case study. Ocean Sciences Meeting, San Antonio TX, January 2000.

  105. 2000 Russ, M. E., N. E. Ostrom, B. Popp, T. M. Rust and D. M. Karl. Mechanisms of N2O production in the subtropical North Pacific based on determination of the isotopic abundance of N2O and O2. Ocean Sciences Meeting, San Antonio, TX, January 2000.

  106. 2001 Neuer, S., R. Davenport, T. Freudenthal, G. Wefer, O. Llinas, M. J. Rueda, D. K. Steinberg, M. H. Conte and D. M. Karl. Differences in Redfield ratios between open ocean time series stations and implications for carbon export. ASLO Aquatic Sciences Meeting, Albuquerque, NM, February 2001.

  107. 2001 Smith, JR., K. L., R. J. Baldwin, D. M. Karl and A. Boetius. Benthic community responses to seasonal pulses in pelagic food supply: Central North Pacific gyre. ASLO Aquatic Sciences Meeting, Albuquerque, NM, February 2001.

  108. 2001 Lukas, R. and F. Santiago-Mandujano. The Source Region for Eddies Influencing the Hawaii Ocean Time-series. The Oceanography Society Meeting. Miami Beach, Florida. April 2001.

  109. 2001 Lukas, R. Influence of Rainfall on the Subtropical North Pacific Mixed Layer. The Oceanography Society Meeting. Miami Beach, Florida. April 2001.

  110. 2002 Karl, D. M., J. E. Dore, T. A. Houlihan, D. V. Hebel and L. A. Fujieki. Seasonal and interannual variability in the biological pump at Station ALOHA. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  111. 2002 Dore, J. E., L. M. Tupas, J. R. Brum and D. M. Karl. Nitrogen-based and nitrogen fixation-based support of export production at Station ALOHA: 1989-2001. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  112. 2002 Gasc, A. M. E., P. J. Morris and D. M. Karl. Sources and sinks of hydrogen peroxide at Station ALOHA. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  113. 2002 Emerson, S. C. Stump, B. Johnson and D. M. Karl. In situ determination of oxygen and nitrogen concentrations in the upper ocean. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  114. 2002 Lee, K., D. M. Karl, J.-Z. Zhang and R. Wanninkhof. Global estimates of carbon export in the nitrate-depleted tropical and subtropical oceans. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  115. 2002 Letelier, R. M., D. M. Karl, M. R. Abbott. R. R. Bidigare and J. S. Nahorniak. Temporal variability of light penetration depth at Station ALOHA: Potential effect in productivity and phytoplankton community structure in the lower euphotic zone. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  116. 2002 Lukas, R., T. Finnigan, D. Luther, M. Merrifield, A.T. Morrison, F. Santiago-Mandujano , J.M. Toole, S.E. Worrilow. Observations of Internal Tides along the Kaena Point Ridge. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  117. 2002 Morris, P. J., P. J. leB. Williams and D. M. Karl, In vitro measurements of net community production in the euphotic zone of the subtropical North Pacific. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  118. 2002 Santiago-Mandujano F., R. Lukas, S. DeCarlo, and E. Firing. An Internal Tide Climatology from the Hawaii Ocean Time-Series. AGU Ocean Sciences Meeting, Honolulu, HI, February 2002.

  119. 2002 Lukas, R., and F. Santiago-Mandujano. Temporal Variations of Advection and Diffusion Limit Understanding of Biogeochemical Evolution in the North Pacific Subtropical Gyre. U.S. JGOFS Ocean Time-series Summit. Vancouver, British Columbia, April 2002.

  120. 2002 Lukas, R., F. Santiago-Mandujano, and L. Zamudio. Water Mass Variability in the Hawaii Ocean Time-series. WOCE and Beyond Meeting. San Antonio, Texas. November 2002.

  121. 2002 Lukas, R., F. Santiago-Mandujano, and E. Firing. Long-Term Hydrographic Variations Observed in the Hawaii Ocean Time-series. WOCE and Beyond Meeting. San Antonio, Texas. November 2002.

  122. 2002 Stammer, D., S. Park, A. Kohl, R. Lukas, and F. Santiago-Mandujano. ECCO Estimates of Large-scale Changes at the Hawaii Ocean Time-series Station. WOCE and Beyond Meeting. San Antonio, Texas. November 2002.

  123. 2002 Benitez-Nelson, C. R., T. K. Gregory and D. M. Karl. Upper ocean and mesopelagic particulate export at Station ALOHA in the NPSG derived from 234TH. AGU Fall Meeting, San Francisco, CA, December 2002.

  124. 2002 Duennebier, F. K., R. Butler, D. M. Karl and R. B. Lukas. New opportunities for cabled ocean observatories. AGU Fall Meeting, San Francisco, CA, December 2002.

  125. 2002 Johnson, K. S., V. A. Elrod, S. E. Fitzwater, J. N. Plant, F. P. Chavez, S. J. Tanner, R. M. Gordon, D. L. Westphal, K. D. Perry and D. M. Karl. Iron and ecosystem response to surface ocean - lower atmosphere interactions in the North Pacific Ocean gyre. AGU Fall Meeting, San Francisco, CA, December 2002.

  126. 2002 Juranek, L. W., P. D. Quay and D. M. Karl. Primary productivity rates at Station ALOHA determined by 18O labeling and the triple isotope composition of dissolved oxygen. AGU Fall Meeting, San Francisco, CA, December 2002.

  127. 2002 Sakamoto, C. M., D. M. Karl, H. W. Jannasch, R. R. Bidigare, R. M. Letelier and K. S. Johnson. Nitrate variability measured in situ on the HALE ALOHA open ocean mooring: Influence of mesoscale eddy activity on phytoplankton community dynamics. AGU Fall Meeting, San Francisco, CA, December 2002.

  128. 2003 Lukas, R. Freshwater Flux Variations and Impacts on the North Pacific Ocean. American Geophysical Union Fall Meeting, San Francisco, CA, November 2003.

  129. 2004 Bidigare, R. R., Y. Chao, R. Lukas, R. M. Letelier, S. Christensen and D. M. Karl. Temporal variations in phytoplankton community structure and physical forcing at Station ALOHA (22.75N, 158W). Abstract of the ASLO/TOS Ocean Research Conference, Honolulu, HI, February 2004, p. 16.

  130. 2004 Björkman, K. M. and D. M. Karl. Phosphorus uptake kinetics of different natural populations of bacterioplankton and eukaryotic phytoplankton in the North Pacific Subtropical Gyre. Abstract of the ASLO/TOS Ocean Research Conference, Honolulu, HI, February 2004, p. 16.

  131. 2004 Church, M. J., B. D. Jenkins, D. M. Karl, S. M. Short, E. O. Omoregie and J. P. Zehr. Diversity and vertical distributions of nitrogen-fixing bacteria in the oligotrophic North Pacific Ocean. Abstract of the ASLO/TOS Ocean Research Conference, Honolulu, HI, February 2004, p. 28.

  132. 2004 Clemente, T., K. Björkman, E. Dafner, L. Fujieki, N. Jachowski, D. Sadler, G. Corno, R. Letelier, M. Church, J. Zehr and D. Karl. Regionalization of the Hawaii Ocean Time-series (HOT) observations. Abstract of the ASLO/TOS Ocean Research Conference, Honolulu, HI, February 2004, p. 29.

  133. 2004 Corno, G., R. M. Letelier, M. R. Abbott and D. M. Karl. Estimation of photosynthetic activity, as determined by Fast Repetition Rate Fluorometry (FRRF), in the North Pacific Subtropical Gyre (NPSG). Abstract of the ASLO/TOS Ocean Research Conference, Honolulu, HI, February 2004, p. 33.

  134. 2004 Fujieki, L. A. and D. M. Karl. HOT-DOGS: A user-friendly interface for access to the Hawaii Ocean Time-series data. Abstract of the ASLO/TOS Ocean Research Conference, Honolulu, HI, February 2004, p. 53.

  135. 2004 Letelier, R. M., M. R. Abbott, D. M. Karl, J. Nahorniak, R. R. Bidigare and G. Corno. Assessing phytoplankton biomass and physiological variability at Station ALOHA (22 45'N, 158 00'W) using radiance reflectance profiles. Abstract of the ASLO/TOS Ocean Research Conference, Honolulu, HI, February 2004, p. 92.

  136. 2006 Björkman, K. M. and D. M. Karl. Phosphorus utilization in nutrient enrichment experiments: A case for diatoms depleting the surface ocean of phosphorus in the oligotrophic North Pacific Subtropical Gyre. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  137. 2006 Church, M. J., C. Mahaffey, A. A. Fong, J. P. Zehr, D. M. Karl. Time series investigations into the dynamics of nitrogen fixing bacteria and rates of nitrogen fixation at Station ALOHA. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  138. 2006 Clemente, T. M., M. J. Church, D. M. Karl. Spatial and temporal variability in plankton size structure along biogeochemical gradients in the Pacific Ocean. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  139. 2006 Colman, A. S., R. E. Blake, Y. Liang, D. M. Karl, K. K. Turekian, M. L. Fogel. Phosphate oxygen isotopes and microbial phosphorus cycling in the oceans. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  140. 2006 Dore, J. E., R. Lukas, M. J. Church, D. W. Sadler, R. M. Letelier, D. M. Karl. Multiyear decline in surface ocean carbon dioxide at Station ALOHA: Has the efficiency of the biological carbon pump increased? ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  141. 2006 Duennebier, F. K., M. D. Tremblay, D. Harris, J. Jolly, D. Copson, J. Babinec, W Doi, R. Lukas, D. M. Karl. The ALOHA cabled observatory. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  142. 2006 Fong, A. A., M. J. Church, D. M. Karl, R. Lukas, C. Mahaffey, J. P. Zehr. Diazotroph abundance and diversity during a large bloom in the oligotrophic North Pacific Gyre. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  143. 2006 Grabowski, E. M., K. M. Björkman, M. J. Church, T. M. Clemente, S. E. Curless, L. A. Fujieki, T. K. Gregory, A. E. Harlan, C. W. Mahaffey, D. W. Sadler, B. V. W. Watkins, D. M. Karl. Meridional variations in dissolved and particulate matter concentrations and stoichiometries in the tropical and subtropical Pacific Ocean. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  144. 2006 Grabowski, M. W., D. M. Karl, M. J. Church. Iron and phosphorus as controls on nitrogen fixation at Station ALOHA. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  145. 2006 Hannides, C. C., M. R. Landry. The ALOHA to CLIMAX transect: Understanding current vs. historical perspectives of mesozooplankton community structure in the Subtropical North Pacific Ocean. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  146. 2006 Karl, D. M. Biogeochemistry of phosphorus in the North Pacific Subtropical Gyre. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  147. 2006 Letelier, R. M., A. White, D. M. Karl, M. J. Church, J. Christian. Inter-annual to decadal variability in soluble reactive phosphorus concentration in the North Pacific Subtropical Gyre. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  148. 2006 Lukas, R., F. Santiago-Mandujano, D. Stammer. Interannual to decadal salinity variations observed near Hawaii. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  149. 2006 Montoya, J. P., A. Hansen, D. M. Karl, J. P. Zehr. Size fractionated rates and patterns of nitrogen and carbon fixation in the North Pacific Subtropical Gyre. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  150. 2006 Nahorniak, J., R. M. Letelier, A. Ashe, D. M. Karl, M. J. Church, L. A. Fujieki. In situ optical characterization of summer blooms in the North Pacific Subtropical Gyre. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  151. 2006 Sadler, D. W., K. M. Björkman, M. J. Church, T. M. Clemente, S. E. Curless, D. G. Foley, A. A. Fong, L. A. Fujieki, E. M. Grabowski, T. K. Gregory, D. M. Karl, R. M. Letelier, P. J. Lethaby, R. Lukas, C. Mahaffey, S. Maenner, P. M. McAndrew, C. L. Sabine, F. Santiago-Mandujano, B. V. W. Watkins. Station ALOHA blooms: Biogeochemical characteristics of a large plankton bloom in the oligotrophic North Pacific Ocean. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.

  152. 2006 Zehr, J. P., J. P. Montoya, C. Short, A. Hansen, B. D. Jenkins, M. J. Church, D. M. Karl. Nitrogenase gene expression in the North Pacific Subtropical Gyre. ASLO/TOS/AGU Ocean Sciences Meeting, Honolulu, HI, February 2006.