Now showing items 330-349 of 866

    • Glacial-interglacial modulation of the marine nitrogen cycle by high-latitude O2 supply to the global thermocline 

      Galbraith, Eric D.; Kienast, Markus; Pedersen, Thomas F.; Calvert, Stephen E. (American Geophysical Union, 2004-10-16)
      An analysis of sedimentary nitrogen isotope records compiled from widely distributed marine environments emphasizes the global synchrony of denitrification changes and provides evidence for a strong temporal coupling of ...
    • Global assessment of ocean carbon export by combining satellite observations and food-web models 

      Siegel, David A.; Buesseler, Ken O.; Doney, Scott C.; Sailley, Sevrine F.; Behrenfeld, Michael J.; Boyd, Philip W. (John Wiley & Sons, 2014-03-10)
      The export of organic carbon from the surface ocean by sinking particles is an important, yet highly uncertain, component of the global carbon cycle. Here we introduce a mechanistic assessment of the global ocean carbon ...
    • Global carbon budget 2013 

      Le Quere, Corinne; Peters, Glen P.; Andres, Robert J.; Andrew, Robbie M.; Boden, T. A.; Ciais, Philippe; Friedlingstein, Pierre; Houghton, Richard A.; Marland, G.; Moriarty, Roisin; Sitch, Stephen; Tans, Pieter P.; Arneth, Almut; Arvanitis, A.; Bakker, Dorothee C. E.; Bopp, Laurent; Canadell, Josep G.; Chini, Louise Parsons; Doney, Scott C.; Harper, A.; Harris, Ian; House, Jo I.; Jain, Atul K.; Jones, S. D.; Kato, Etsushi; Keeling, Ralph F.; Klein Goldewijk, Kees; Kortzinger, A.; Koven, Charles; Lefevre, N.; Maignan, F.; Omar, A.; Ono, Tsuneo; Park, Geun-Ha; Pfeil, Benjamin; Poulter, Benjamin; Raupach, Michael R.; Regnier, P.; Rodenbeck, C.; Saito, Shu; Schwinger, Jorg; Segschneider, J.; Stocker, B. D.; Takahashi, Taro; Tilbrook, Bronte; van Heuven, Steven; Viovy, N.; Wanninkhof, Rik; Wiltshire, A.; Zaehle, Sonke (Copernicus Publications., 2014-06-17)
      Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere is important to better understand the global carbon cycle, support the ...
    • Global carbon budget 2014 

      Le Quere, Corinne; Moriarty, Roisin; Andrew, Robbie M.; Peters, Glen P.; Ciais, Philippe; Friedlingstein, Pierre; Jones, S. D.; Sitch, Stephen; Tans, Pieter P.; Arneth, Almut; Boden, T. A.; Bopp, Laurent; Bozec, Yann; Canadell, Josep G.; Chini, Louise Parsons; Chevallier, F.; Cosca, C. E.; Harris, Ian; Hoppema, Mario; Houghton, Richard A.; House, Jo I.; Jain, Atul K.; Johannessen, T.; Kato, Etsushi; Keeling, R. F.; Kitidis, Vassilis; Klein Goldewijk, Kees; Koven, Charles; Landa, C. S.; Landschutzer, Peter; Lenton, A.; Lima, Ivan D.; Marland, G.; Mathis, Jeremy T.; Metzl, Nicolas; Nojiri, Yukihiro; Olsen, Are; Ono, Tsuneo; Peng, S.; Peters, W.; Pfeil, Benjamin; Poulter, Benjamin; Raupach, Michael R.; Regnier, P.; Rodenbeck, C.; Saito, Shu; Salisbury, Joseph E.; Schuster, Ute; Schwinger, Jorg; Seferian, Roland; Segschneider, J.; Steinhoff, Tobias; Stocker, B. D.; Sutton, Adrienne J.; Takahashi, Taro; Tilbrook, Bronte; van der Werf, Guido R.; Viovy, N.; Wang, Y.-P.; Wanninkhof, Rik; Wiltshire, A.; Zeng, Ning (Copernicus Publications, 2015-05-08)
      Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere is important to better understand the global carbon cycle, support the ...
    • Global Carbon Budget 2015 

      Le Quere, Corinne; Moriarty, Roisin; Andrew, Robbie M.; Canadell, Josep G.; Sitch, Stephen; Korsbakken, Jan Ivar; Friedlingstein, Pierre; Peters, Glen P.; Andres, Robert J.; Boden, T. A.; Houghton, Richard A.; House, Jo I.; Keeling, Ralph F.; Tans, Pieter P.; Arneth, Almut; Bakker, Dorothee C. E.; Barbero, Leticia; Bopp, Laurent; Chang, J.; Chevallier, F.; Chini, Louise Parsons; Ciais, Philippe; Fader, Marianela; Feely, Richard A.; Gkritzalis, Thanos; Harris, Ian; Hauck, Judith; Ilyina, Tatiana; Jain, Atul K.; Kato, Etsushi; Kitidis, Vassilis; Klein Goldewijk, Kees; Koven, Charles; Landschutzer, Peter; Lauvset, Siv K.; Lefevre, N.; Lenton, A.; Lima, Ivan D.; Metzl, Nicolas; Millero, Frank J.; Munro, D. R.; Murata, Akihiko; Nabel, Julia E. M. S.; Nakaoka, Shin-ichiro; Nojiri, Yukihiro; O'Brien, Kevin; Olsen, Are; Ono, Tsuneo; Perez, Fiz F.; Pfeil, Benjamin; Pierrot, Denis; Poulter, Benjamin; Rehder, Gregor; Rodenbeck, C.; Saito, Shu; Schuster, Ute; Schwinger, Jorg; Seferian, Roland; Steinhoff, Tobias; Stocker, B. D.; Sutton, Adrienne J.; Takahashi, Taro; Tilbrook, Bronte; van der Laan-Luijkx, I. T.; van der Werf, Guido R.; van Heuven, Steven; Vandemark, Doug; Viovy, N.; Wiltshire, A.; Zaehle, Sonke; Zeng, Ning (Copernicus Publications, 2015-12-07)
      Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere is important to better understand the global carbon cycle, support the ...
    • Global estimate of submarine groundwater discharge based on an observationally constrained radium isotope model 

      Kwon, Eun Young; Kim, Guebuem; Primeau, Francois W.; Moore, Willard S.; Cho, Hyung-Mi; DeVries, Timothy; Sarmiento, Jorge L.; Charette, Matthew A.; Cho, Yang-Ki (John Wiley & Sons, 2014-12-03)
      Along the continental margins, rivers and submarine groundwater supply nutrients, trace elements, and radionuclides to the coastal ocean, supporting coastal ecosystems and, increasingly, causing harmful algal blooms and ...
    • Global ocean carbon uptake : magnitude, variability and trends 

      Wanninkhof, Rik; Park, Geun-Ha; Takahashi, Taro; Sweeney, Colm; Feely, Richard A.; Nojiri, Yukihiro; Gruber, Nicolas; Doney, Scott C.; McKinley, Galen A.; Lenton, A.; Le Quere, Corinne; Heinze, Christoph; Schwinger, Jorg; Graven, Heather; Khatiwala, Samar (Copernicus Publications on behalf of the European Geosciences Union, 2013-03-22)
      The globally integrated sea–air anthropogenic carbon dioxide (CO2) flux from 1990 to 2009 is determined from models and data-based approaches as part of the Regional Carbon Cycle Assessment and Processes (RECCAP) project. ...
    • Global oceanic emission of ammonia : constraints from seawater and atmospheric observations 

      Paulot, Fabien; Jacob, Daniel J.; Johnson, Martin T.; Bell, Tom G.; Baker, Alexander R.; Keene, William C.; Lima, Ivan D.; Doney, Scott C.; Stock, Charles A. (John Wiley & Sons, 2015-08-13)
      Current global inventories of ammonia emissions identify the ocean as the largest natural source. This source depends on seawater pH, temperature, and the concentration of total seawater ammonia (NHx(sw)), which reflects ...
    • Global temperature calibration of the alkenone unsaturation index (UK′37) in surface waters and comparison with surface sediments 

      Conte, Maureen H.; Sicre, Marie-Alexandrine; Ruhlemann, Carsten; Weber, John C.; Schulte, Sonja; Schulz-Bull, Detlef; Blanz, Thomas (American Geophysical Union, 2006-02-07)
      In this paper, we compile the current surface seawater C37 alkenone unsaturation (UK′37) measurements (n=629, −1 to 30°C temperature range) to derive a global, field-based calibration of UK′37 with alkenone production ...
    • Globally elevated titanium, tantalum, and niobium (TITAN) in ocean island basalts with high 3He/4He 

      Jackson, Matthew G.; Hart, Stanley R.; Saal, Alberto E.; Shimizu, Nobumichi; Kurz, Mark D.; Blusztajn, Jerzy S.; Skovgaard, Anna C. (American Geophysical Union, 2008-04-17)
      We report evidence for a global Ti, Ta, and Nb (TITAN) enriched reservoir sampled by ocean island basalts (OIBs) with high 3He/4He ratios, an isotopic signature associated with the deep mantle. Excesses of Ti (and to a ...
    • Gradients in dimethylsulfide, dimethylsulfoniopropionate, dimethylsulfoxide, and bacteria near the sea surface 

      Zemmelink, Hendrik J.; Houghton, Leah; Sievert, Stefan M.; Frew, Nelson M.; Dacey, John W. H. (Inter-Research, 2005-06-23)
      Gradients of dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), dimethylsulfoxide (DMSO), and bacterial numbers and diversity from the surface microlayer to 500 cm depth were assessed in coastal waters surrounding ...
    • Gradients in intact polar diacylglycerolipids across the Mediterranean Sea are related to phosphate availability 

      Popendorf, Kimberly J.; Tanaka, T.; Pujo-Pay, M.; Lagaria, A.; Courties, C.; Conan, P.; Oriol, L.; Sofen, L. E.; Moutin, T.; Van Mooy, Benjamin A. S. (Copernicus Publications on behalf of the European Geosciences Union, 2011-12-20)
      Intact polar membrane lipids compose a significant fraction of cellular material in plankton and their synthesis imposes a substantial constraint on planktonic nutrient requirements. As a part of the Biogeochemistry from ...
    • Gross and microscopic lesions in corals from Micronesia 

      Work, Thierry M.; Aeby, Greta S.; Hughen, Konrad A. (2015-03)
      We documented gross and microscopic morphology of lesions in corals on seven islands spanning western, southern, and eastern Micronesia. We sampled 76 colonies comprising 30 species of corals among 18 genera with Acropora, ...
    • Gross and net production during the spring bloom along the Western Antarctic Peninsula 

      Goldman, Johanna A. L.; Kranz, Sven A.; Young, Jodi N.; Tortell, Philippe D.; Stanley, Rachel H. R.; Bender, Michael L.; Morel, Francois M. M. (2014-10)
      This study explores some of the physiological mechanisms responsible for high productivity near the shelf in the Western Antarctic Peninsula despite a short growing season and cold temperature. We measured gross and net ...
    • Growth and composition of high-Mg calcite in the skeleton of a Bermudian gorgonian (Plexaurella dichotoma) : potential for paleothermometry 

      Bond, Zoe A.; Cohen, Anne L.; Smith, Struan R.; Jenkins, William J. (American Geophysical Union, 2005-08-31)
      We used Secondary Ion Mass Spectrometry (SIMS) ion microprobe to analyze magnesium-to-calcium (Mg/Ca) and strontium-to-calcium (Sr/Ca) ratios of high-Mg calcite loculi within the skeleton of a shallow water gorgonian, ...
    • Growth and specific P-uptake rates of bacterial and phytoplanktonic communities in the Southeast Pacific (BIOSOPE cruise) 

      Duhamel, Solange; Moutin, T.; Van Wambeke, F.; Van Mooy, Benjamin A. S.; Rimmelin, P.; Raimbault, P.; Claustre, H. (Copernicus Publications on behalf of the European Geosciences Union, 2007-11-08)
      Predicting heterotrophic bacteria and phytoplankton specific growth rates (μ) is of great scientific interest. Many methods have been developed in order to assess bacterial or phytoplankton μ. One widely used method is to ...
    • The Guaymas Basin hiking guide to hydrothermal mounds, chimneys, and microbial mats : complex seafloor expressions of subsurface hydrothermal circulation 

      Teske, Andreas; de Beer, Dirk; McKay, Luke J.; Tivey, Margaret K.; Biddle, Jennifer F.; Hoer, Daniel; Lloyd, Karen G.; Lever, Mark A.; Røy, Hans; Albert, Daniel B.; Mendlovitz, Howard P.; MacGregor, Barbara J. (Frontiers Media, 2016-02-18)
      The hydrothermal mats, mounds, and chimneys of the southern Guaymas Basin are the surface expression of complex subsurface hydrothermal circulation patterns. In this overview, we document the most frequently visited features ...
    • Halogenated 1'-methyl-1,2'-bipyrroles (MBPs) in the northwestern Atlantic 

      Pangallo, Kristin C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2009-09)
      Halogenated 1’-methyl-1,2’-bipyrroles (MBPs) are a distinctive class of marine organic compounds. They are naturally produced, they have a unique carbon structure, they are highly halogenated, and they bioaccumulate in ...
    • Halogenated organic compounds in archived whale oil : a pre-industrial record 

      Teuten, Emma L.; Reddy, Christopher M. (2006-07-24)
      To provide additional evidence that several halogenated organic compounds (HOCs) found in environmental samples are natural and not industrially produced, we analyzed an archived whale oil sample collected in 1921 from the ...
    • Helium and lead isotope geochemistry of oceanic volcanic rocks from the East Pacific and South Atlantic 

      Graham, David W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-09)
      The isotopic evolution of helium and lead in the Earth is coupled by virtue of their common radioactive parents uranium and thorium. The isotopic signatures in oceanic volcanic rocks provide constraints on the temporal ...