Now showing items 433-452 of 945

    • An inland sea high nitrate-low chlorophyll (HNLC) region with naturally high pCO2 

      Murray, James W.; Roberts, Emily; Howard, Evan M.; O'Donnell, Michael; Bantam, Cory; Carrington, Emily; Foy, Mike; Paul, Barbara; Fay, Amanda (John Wiley & Sons, 2015-02-19)
      We present a time series of data for temperature, salinity, nitrate, and carbonate chemistry from September 2011 to July 2013 at the University of Washington's Friday Harbor Laboratories. Samples were collected at the ...
    • Inorganic carbon speciation and fluxes in the Congo River 

      Wang, Zhaohui Aleck; Bienvenu, Dinga Jean; Mann, Paul J.; Hoering, Katherine A.; Poulsen, John R.; Spencer, Robert G. M.; Holmes, Robert M. (John Wiley & Sons, 2013-02-14)
      Seasonal variations in inorganic carbon chemistry and associated fluxes from the Congo River were investigated at Brazzaville-Kinshasa. Small seasonal variation in dissolved inorganic carbon (DIC) was found in contrast ...
    • Inorganic carbon system dynamics in landfast Arctic sea ice during the early-melt period 

      Brown, Kristina A.; Miller, Lisa A.; Mundy, C. J.; Papakyriakou, Tim; Francois, Roger; Gosselin, Michel; Carnat, Gauthier; Swystun, Kyle; Tortell, Philippe D. (John Wiley & Sons, 2015-05-19)
      We present the results of a 6 week time series of carbonate system and stable isotope measurements investigating the effects of sea ice on air-sea CO2 exchange during the early melt period in the Canadian Arctic Archipelago. ...
    • Insight into chemical, biological, and physical processes in coastal waters from dissolved oxygen and inert gas tracers 

      Manning, Cara C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2017-02)
      In this thesis, I use coastal measurements of dissolved O2 and inert gases to provide insight into the chemical, biological, and physical processes that impact the oceanic cycles of carbon and dissolved gases. Dissolved ...
    • Insights into vitamin B12 production, acquisition, and use by marine microbes 

      Bertrand, Erin M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-02)
      The distribution and magnitude of marine primary production helps determine the ocean's role in global carbon cycling. Constraining factors that impact this productivity and elucidating selective pressures that drive the ...
    • Insights on geochemical cycling of U, Re and Mo from seasonal sampling in Boston Harbor, Massachusetts, USA 

      Morford, Jennifer L.; Martin, William R.; Kalnejais, Linda H.; Francois, Roger; Bothner, Michael H.; Karle, Ida-Maja (2006-10-23)
      This study examined the removal of U, Mo, and Re from seawater by sedimentary processes at a shallow-water site with near-saturation bottom water O2 levels (240-380 μmol O2/L), very high organic matter oxidation rates ...
    • Insights to magmatic–hydrothermal processes in the Manus back-arc basin as recorded by anhydrite 

      Craddock, Paul R.; Bach, Wolfgang (2010-06-16)
      Microchemical analyses of rare earth element (REE) concentrations and Sr and S isotope ratios of anhydrite are used to identify sub–seafloor processes governing the formation of hydrothermal fluids in the convergent ...
    • IntCal04 terrestrial radiocarbon age calibration, 0-26 cal kyr BP 

      Reimer, Paula J.; Baillie, Mike G. L.; Bard, Edouard; Bayliss, Alex; Beck, J. Warren; Bertrand, Chanda J. H.; Blackwell, Paul G.; Buck, Caitlin E.; Burr, George S.; Cutler, Kirsten B.; Damon, Paul E.; Edwards, R. Lawrence; Fairbanks, Richard G.; Friedrich, Michael; Guilderson, Thomas P.; Hogg, Alan G.; Hughen, Konrad A.; Kromer, Bernd; McCormac, Gerry; Manning, Sturt; Ramsey, C. Bronk; Reimer, Ron W.; Remmele, Sabine; Southon, John R.; Stuiver, Minze; Talamo, Sahra; Taylor, F. W.; van der Plicht, Johannes; Weyhenmeyer, Constanze E. (Dept. of Geosciences, University of Arizona, 2004)
      A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace IntCal98, which extended from 0–24 cal kyr BP (Before Present, 0 cal BP ...
    • IntCal09 and Marine09 radiocarbon age calibration curves, 0–50,000 years cal BP 

      Reimer, Paula J.; Bard, Edouard; Bayliss, Alex; Beck, J. Warren; Blackwell, Paul G.; Ramsey, C. Bronk; Buck, Caitlin E.; Cheng, Hai; Edwards, R. Lawrence; Friedrich, Michael; Grootes, Pieter. M.; Guilderson, Thomas P.; Haflidason, Haflidi; Hajdas, Irka; Hatte, Christine; Heaton, Timothy J.; Hoffmann, Dirk L.; Hogg, Alan G.; Hughen, Konrad A.; Kaiser, K. Felix; Kromer, Bernd; Manning, Sturt W.; Niu, Mu; Reimer, Ron W.; Richards, David A.; Scott, E. Marian; Southon, John R.; Staff, Richard A.; Turney, Christian S. M.; van der Plicht, Johannes (Dept. of Geosciences, University of Arizona, 2009-12)
      The IntCal04 and Marine04 radiocarbon calibration curves have been updated from 12 cal kBP (cal kBP is here defined as thousands of calibrated years before AD 1950), and extended to 50 cal kBP, utilizing newly available ...
    • An integrated assessment model for helping the United States sea scallop (Placopecten magellanicus) fishery plan ahead for ocean acidification and warming 

      Cooley, Sarah R.; Rheuban, Jennie E.; Hart, Deborah R.; Luu, Victoria; Glover, David M.; Hare, Jonathan A.; Doney, Scott C. (Public Library of Science, 2015-05-06)
      Ocean acidification, the progressive change in ocean chemistry caused by uptake of atmospheric CO2, is likely to affect some marine resources negatively, including shellfish. The Atlantic sea scallop (Placopecten magellanicus) ...
    • Integrated Fe- and S-isotope study of seafloor hydrothermal vents at East Pacific Rise 9–10°N 

      Rouxel, Olivier J.; Shanks, Wayne C.; Bach, Wolfgang; Edwards, Katrina J. (2008-03-06)
      In this study, we report on coupled Fe- and S-isotope systematics of hydrothermal fluids and sulfide deposits from the East Pacific Rise at 9-10°N to better constrain processes affecting Fe- isotope fractionation in ...
    • Integrating comprehensive two-dimensional gas chromatography and downhole fluid analysis to validate a spill-fill sequence of reservoirs with variations of biodegradation, water washing and thermal maturity 

      Forsythe, Jerimiah C.; Martin, Robin; De Santo, Ilaria; Tyndall, Richard; Arman, Kate; Pye, Jonathan; De Nicolais, Nelly; Nelson, Robert K.; Pomerantz, Andrew E.; Kenyon-Roberts, Stephen; Zuo, Julian Y.; Betancourt, Soraya S.; Reddy, Christopher M.; Peters, Kenneth E.; Mullins, Oliver C. (2016-09)
      Optimization of crude oil production depends heavily on crude oil composition and its variation within individual reservoirs and across multiple reservoirs. In particular, asphaltene content has an enormous impact on crude ...
    • Intensity of Th and Pa scavenging partitioned by particle chemistry in the North Atlantic Ocean 

      Hayes, Christopher T.; Anderson, Robert F.; Fleisher, Martin Q.; Vivancos, Sebastian M.; Lam, Phoebe J.; Ohnemus, Daniel C.; Huang, Kuo-Fang; Robinson, Laura F.; Lu, Yanbin; Cheng, Hai; Edwards, R. Lawrence; Moran, S. Bradley (2015-01)
      The natural radionuclides 231Pa and 230Th are incorporated into the marine sediment record by scavenging, or adsorption to various particle types, via chemical reactions that are not fully understood. Because these ...
    • The interaction of metal ions at the hydrous manganese dioxide-solution interface 

      Murray, James W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1973-06)
      An experimental study of the interaction of metal ions with the surface of hydrous manganese dioxide has been completed. The results of these experiments have greatly improved our qualitative understanding of the adsorption ...
    • Interactions of cadmium, zinc, and phosphorus in marine Synechococcus : field uptake, physiological and proteomic studies 

      Cox, Alysia D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2011-06)
      A combination of uptake field studies on natural phytoplankton assemblages and laboratory proteomic and physiological experiments on cyanobacterial isolates were conducted investigating the interactions of cadmium (Cd), ...
    • Interannual variability of primary production and dissolved organic nitrogen storage in the North Pacific Subtropical Gyre 

      Luo, Ya-Wei; Ducklow, Hugh W.; Friedrichs, Marjorie A. M.; Church, Matthew J.; Karl, David M.; Doney, Scott C. (American Geophysical Union, 2012-08-10)
      The upper ocean primary production measurements from the Hawaii Ocean Time series (HOT) at Station ALOHA in the North Pacific Subtropical Gyre showed substantial variability over the last two decades. The annual average ...
    • Interannual variations in continental-scale net carbon exchange and sensitivity to observing networks estimated from atmospheric CO2 inversions for the period 1980 to 2005 

      Gurney, Kevin R.; Baker, David F.; Rayner, Peter; Denning, Scott (American Geophysical Union, 2008-08-26)
      Interannually varying net carbon exchange fluxes from the TransCom 3 Level 2 Atmospheric Inversion Intercomparison Experiment are presented for the 1980 to 2005 time period. The fluxes represent the model mean, net carbon ...
    • Intercalibration studies of short-lived thorium-234 in the water column and marine particles 

      Maiti, Kanchan; Buesseler, Ken O.; Pike, Steven M.; Benitez-Nelson, Claudia R.; Cai, Pinghe; Chen, Weifang; Cochran, Kirk; Dai, Minhan; Dehairs, Frank; Gasser, Beat; Kelly, Roger P.; Masque, Pere; Miller, Lisa A.; Miquel, Juan Carlos; Moran, S. Bradley; Morris, Paul J.; Peine, Florian; Planchon, Frederic; Renfro, Alisha A.; Rutgers van der Loeff, Michiel M.; Santschi, Peter H.; Turnewitsch, Robert; Waples, James T.; Xu, Chen (Association for the Sciences of Limnology and Oceanography, 2012-09)
      Intercomparision of 234Th measurements in both water and particulate samples was carried out between 15 laboratories worldwide, as a part of GEOTRACES inter-calibration program. Particulate samples from four different ...
    • An intercomparison of procedures for the determination of total mercury in seawater and recommendations regarding mercury speciation during GEOTRACES cruises 

      Lamborg, Carl H.; Hammerschmidt, Chad R.; Gill, Gary A.; Mason, Robert P.; Gichuki, Susan (Association for the Sciences of Limnology and Oceanography, 2012-02)
      We conducted a laboratory intercomparison of total mercury (Hg) determination in seawater collected during U.S. GEOTRACES Intercalibration cruises in 2008 and 2009 to the NW Atlantic and NE Pacific Oceans. Results indicated ...
    • An interdisciplinary assessment of climate engineering strategies 

      Cusack, Daniela F.; Axsen, Jonn; Shwom, Rachael; Hartzell-Nichols, Lauren; White, Sam; Mackey, Katherine R. M. (Ecological Society of America, 2014-06)
      Mitigating further anthropogenic changes to the global climate will require reducing greenhouse-gas emissions (“abatement”), or else removing carbon dioxide from the atmosphere and/or diminishing solar input (“climate ...