Now showing items 310-329 of 803

  • Global carbon budget 2013 

    Le Quere, Corinne; Peters, G. P.; Andres, R. J.; Andrew, R. M.; Boden, T. A.; Ciais, Philippe; Friedlingstein, Pierre; Houghton, Richard A.; Marland, G.; Moriarty, R.; Sitch, Stephen; Tans, Pieter P.; Arneth, Almut; Arvanitis, A.; Bakker, Dorothee C. E.; Bopp, Laurent; Canadell, Josep G.; Chini, L. P.; Doney, Scott C.; Harper, A.; Harris, I.; House, J. I.; Jain, Atul K.; Jones, S. D.; Kato, E.; Keeling, R. F.; Klein Goldewijk, K.; Kortzinger, A.; Koven, C.; Lefevre, N.; Maignan, F.; Omar, A.; Ono, T.; Park, Geun-Ha; Pfeil, Benjamin; Poulter, Benjamin; Raupach, M. R.; Regnier, P.; Rodenbeck, C.; Saito, S.; Schwinger, J.; 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, R.; Andrew, R. M.; Peters, G. 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, L. P.; Chevallier, F.; Cosca, C. E.; Harris, I.; Hoppema, Mario; Houghton, Richard A.; House, J. I.; Jain, Atul K.; Johannessen, T.; Kato, E.; Keeling, R. F.; Kitidis, V.; Klein Goldewijk, K.; Koven, C.; Landa, C. S.; Landschutzer, P.; Lenton, A.; Lima, Ivan D.; Marland, G.; Mathis, Jeremy T.; Metzl, Nicolas; Nojiri, Yukihiro; Olsen, A.; Ono, T.; Peng, S.; Peters, W.; Pfeil, Benjamin; Poulter, Benjamin; Raupach, M. R.; Regnier, P.; Rodenbeck, C.; Saito, S.; Salisbury, Joseph E.; Schuster, Ute; Schwinger, J.; Seferian, R.; Segschneider, J.; Steinhoff, T.; Stocker, B. D.; Sutton, A. 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 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, J.; Graven, Heather; Khatiwala, S. (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 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 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 ...
  • 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 ...
  • Helium isotope geochemistry of oceanic volcanic rocks : implications for mantle heterogeneity and degassing 

    Kurz, Mark D. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1982-06)
    The concentrations and isotopic compositions of helium have been measured in a number of mantle derived oceanic basalts. The goal of this research is to use the helium isotopic systematics to constrain the nature and ...
  • Heterogeneous reservoirs in the marine carbon cycle 

    Follett, Christopher L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2014-06)
    Understanding the fate of primary production in the ocean is a challenging task because once produced, organic material is oxidized over timescales which range from minutes, to millions of years. This timescale diversity ...
  • Hierarchical and dynamic seascapes : a quantitative framework for scaling pelagic biogeochemistry and ecology 

    Kavanaugh, Maria T.; Hales, Burke; Saraceno, Martin; Spitz, Yvette H.; White, Angelicque E.; Letelier, Ricardo M. (2013-10-07)
    Comparative analyses of oceanic ecosystems require an objective framework to define coherent study regions and scale the patterns and processes observed within them. We applied the hierarchical patch mosaic paradigm of ...
  • High biomass, low export regimes in the Southern Ocean 

    Lam, Phoebe J.; Bishop, James K. B. (2006-06-28)
    This paper investigates ballasting and remineralization controls of carbon sedimentation in the twilight zone (100-1000 m) of the Southern Ocean. Size-fractionated (<1 μm, 1-51 μm, >51 μm) suspended particulate matter ...
  • High dimethylsulfide photolysis rates in nitrate-rich Antarctic waters 

    Toole, Dierdre A.; Kieber, David J.; Kiene, Ronald P.; White, E. M.; Bisgrove, J.; del Valle, D. A.; Slezak, D. (American Geophysical Union, 2004-06-09)
    The photochemistry of dimethylsulfide (DMS) was examined in the Southern Ocean to assess its impact on the biogeochemical dynamics of DMS in Antarctic waters. Very high DMS photolysis rate constants (0.16–0.23 h−1) were ...
  • High molecular weight (HMW) dissolved organic matter (DOM) in seawater : chemical structure, sources and cycling 

    Aluwihare, Lihini I. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1999-04)
    The goal of this thesis was to use high resolution analytical techniques coupled with molecular level analyses to chemically characterize high molecular weight (> 1 k Da (HMW)) dissolved organic matter (DOM) isolated ...