Now showing items 393-412 of 867

    • Incidence of lesions on Fungiidae corals in the eastern Red Sea is related to water temperature and coastal pollution 

      Furby, Kathryn A.; Apprill, Amy; Cervino, J. M.; Ossolinski, Justin E.; Hughen, Konrad A. (2014-03)
      As sea surface temperatures rise and the global human population increases, large-scale field observations of marine organism health and water quality are increasingly necessary. We investigated the health of corals from ...
    • Increase in mercury in Pacific yellowfin tuna 

      Drevnick, Paul E.; Lamborg, Carl H.; Horgan, Martin J. (2015-01)
      Mercury is a toxic trace metal that can accumulate to levels that threaten human and environmental health. Models and empirical data suggest that humans are responsible for a great deal of the mercury actively cycling ...
    • Increased accumulation of sulfur in lake sediments of the high Arctic 

      Drevnick, Paul E.; Muir, Derek C. G.; Lamborg, Carl H.; Horgan, Martin J.; Canfield, Donald E.; Boyle, John F.; Rose, Neil L. (2010-08-31)
      We report a synchronous increase in accumulation of reduced inorganic sulfur since c. 1980 in sediment cores from eight of nine lakes studied in the Canadian Arctic and Svalbard (Norway). Sediment incubations and detailed ...
    • Influence of protozoan grazing on the marine geochemistry of particle reactive trace metals 

      Barbeau, Katherine A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-05)
      Planktonic protozoan grazers have the potential to significantly affect the chemistry of particle-associated trace metals. This is due both to the importance of protists as consumers of bacterial-sized particles, and to ...
    • Influences on the oceanic biogeochemical cycling of the hybrid-type metals : cobalt, iron, and manganese 

      Noble, Abigail E. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-02)
      Trace metal cycling is one of many processes that influence ocean ecosystem dynamics. Cobalt, iron, and manganese are redox active trace metal micronutrients with oceanic distributions that are influenced by both biological ...
    • 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. ...
    • 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 ...
    • 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 ...