Now showing items 1940-1959 of 5197

  • 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 ...
  • Glacially generated overpressure on the New England continental shelf : integration of full-waveform inversion and overpressure modeling 

    Siegel, Jacob; Lizarralde, Daniel; Dugan, Brandon; Person, Mark (John Wiley & Sons, 2014-04-29)
    Localized zones of high-amplitude, discontinuous seismic reflections 100 km off the coast of Massachusetts, USA, have P wave velocities up to 190 m/s lower than those of adjacent sediments of equal depth (250 m below the ...
  • Glacial‐interglacial circulation changes inferred from 231Pa/230Th sedimentary record in the North Atlantic region 

    Gherardi, J.‐M.; Labeyrie, L.; Nave, S.; Francois, Roger; McManus, Jerry F.; Cortijo, E. (American Geophysical Union, 2009-05-02)
    Studies from the subtropical western and eastern Atlantic Ocean, using the 231Pa/230Th ratio as a kinematic proxy for deep water circulation, provided compelling evidence for a strong link between climate and the rate 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 barotropic variability of the ocean in response to atmospheric forcing based on multichannel regression and Kalman filter techniques 

    Chechelnitsky, Michael Y. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1996-05)
    TOPEX/POSEIDON altimetry data are employed in the analysis of the global ocean response to atmospheric forcing. We use two different approaches to test the hypothesis that the global sea surface height variability can ...
  • Global biogeochemical fluxes program for the Ocean Observatories Initiative 

    Unknown author (OCB Project Office, 2011-05)
    This OCB Scoping Workshop will explore the potential for development of a major, sustained biogeochemical flux program aligned with the Ocean Observatories Initiative (OOI). The primary focus of this workshop will be to ...
  • 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, Roland; 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 climate patterns explain range-wide synchronicity in survival of a migratory seabird 

    Jenouvrier, Stephanie; Thibault, Jean-Claude; Viallefont, Anne; Vidal, Patrick; Ristow, Dietrich; Mougin, Jean-Louis; Brichetti, Pierandrea; Borg, John J.; Bretagnolle, Vincent (2008-08-25)
    To predict the impact of climate change over the whole species distribution range, comparison of adult survival variations over large spatial scale is of primary concern for long-lived species populations that are ...
  • Global distribution of the decay timescale of mixed layer inertial motions observed by satellite-tracked drifters 

    Park, Jong Jin; Kim, Kuh; Schmitt, Raymond W. (American Geophysical Union, 2009-11-05)
    The decay timescale of mixed layer inertial amplitudes has been estimated from satellite tracked drifter trajectories from 1990 to 2004 as the e-folding timescale of the temporal correlation functions. The decay timescales ...
  • 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 Intercomparability in a Changing Ocean: An International Time‐Series Methods Workshop 

    Unknown author (Ocean Carbon & Biogeochemistry (OCB) Program and International Ocean Carbon Coordination Project (IOCCP), 2013-11)
    Ocean time-series represent one of the most valuable tools scientists have to characterize and quantify ocean carbon fluxes and biogeochemical processes and their links to changing climate. In order to acquire a more ...
  • Global isotopic signatures of oceanic island basalts 

    Oschmann, Lynn A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1991-08)
    Sr, Nd and Pb isotopic analyses of 477 samples representing 30 islands or island groups, 3 seamounts or seamount chains, 2 oceanic ridges and 1 oceanic plateau [for a total of 36 geographic features] are compiled to form ...
  • Global mantle flow and the development of seismic anisotropy : differences between the oceanic and continental upper mantle 

    Conrad, Clinton P.; Behn, Mark D.; Silver, Paul G. (American Geophysical Union, 2007-07-26)
    Viscous shear in the asthenosphere accommodates relative motion between Earth's surface plates and underlying mantle, generating lattice-preferred orientation (LPO) in olivine aggregates and a seismically anisotropic fabric. ...
  • 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, 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 Ocean Summit : a forum for institutional coordination of global ocean observations 

    Cai, Wenju; Avery, Susan K.; Leinen, Margaret; Lee, Kenneth; Lin, Xiaopei; Visbeck, Martin (2014-11)
    A sustainable global ocean observation system requires timely implementation of a global ocean observation framework. The recent Qingdao Global Ocean Summit offers an effective mechanism for a coherent institutional response ...
  • 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 ...
  • The global oceanic freshwater cycle : a state-of-the-art quantification 

    Schanze, Julian J.; Schmitt, Raymond W.; Yu, Lisan (Sears Foundation for Marine Research, 2010-05-01)
    The current capabilities of quantifying the oceanic freshwater cycle are shown based on new observations from satellite data and re-analysis models for evaporation and precipitation over the ocean. For this purpose, we ...
  • Global patterns of diapycnal mixing from measurements of the turbulent dissipation rate 

    Waterhouse, Amy F.; MacKinnon, Jennifer A.; Nash, Jonathan D.; Alford, Matthew H.; Kunze, Eric; Simmons, Harper L.; Polzin, Kurt L.; St. Laurent, Louis C.; Sun, Oliver M. T.; Pinkel, Robert; Talley, Lynne D.; Whalen, Caitlin B.; Huussen, Tycho N.; Carter, Glenn S.; Fer, Ilker; Waterman, Stephanie N.; Naveira Garabato, Alberto C.; Sanford, Thomas B.; Lee, Craig M. (American Meteorological Society, 2014-07)
    The authors present inferences of diapycnal diffusivity from a compilation of over 5200 microstructure profiles. As microstructure observations are sparse, these are supplemented with indirect measurements of mixing obtained ...
  • A global relationship between the ocean water cycle and near-surface salinity 

    Yu, Lisan (American Geophysical Union, 2011-10-18)
    Ocean evaporation (E) and precipitation (P) are the fundamental components of the global water cycle. They are also the freshwater flux forcing (i.e., E-P) for the open ocean salinity. The apparent connection between ocean ...