Now showing items 99-118 of 838

  • Characterization of cytochrome 579, an unusual cytochrome isolated from an iron-oxidizing microbial community 

    Singer, Steven W.; Chan, Clara S.; Zemla, Adam; VerBerkmoes, Nathan C.; Hwang, Mona; Hettich, Robert L.; Banfield, Jillian F.; Thelen, Michael P. (American Society for Microbiology, 2008-05-09)
    A novel, soluble cytochrome with an unusual visible spectral signature at 579 nm (Cyt579) has been characterized after isolation from several different microbial biofilms collected in an extremely acidic ecosystem. Previous ...
  • Characterization of dissolved organic matter in Lake Superior and its watershed using ultrahigh resolution mass spectrometry 

    Minor, Elizabeth C.; Steinbring, Carla J.; Longnecker, Krista; Kujawinski, Elizabeth B. (2011-11-14)
    With the advent of ultrahigh resolution mass spectrometry, recent studies have begun to resolve molecular-level relationships between terrestrial and aquatic dissolved organic matter (DOM) in rivers, estuaries, ...
  • The characterization of humic substances in seawater 

    Stuermer, Daniel H. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1975-09)
    Humic substances were isolated in gram quantities from seawater by a newly developed procedure of adsorption on a crosslinked polystyrene-divinylbenzene resin. The chemical and physical characteristics of both humic acid ...
  • Characterization of methyl sugars, 3-deoxysugars and methyl deoxysugars in marine high molecular weight dissolved organic matter 

    Panagiotopoulos, Christos; Repeta, Daniel J.; Johnson, Carl G. (2007-01-16)
    Nuclear magnetic resonance spectroscopy of marine high molecular weight dissolved organic matter (HMWDOM) in surface waters show that >50% of the carbon is a compositionally well-defined family of acylated-polysaccharides ...
  • Chemical characterization of dissolved organic matter (DOM) in seawater : structure, cycling, and the role of biology 

    Quan, Tracy M. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2005-02)
    The goal of this thesis is to investigate three different areas relating to the characterization of dissolved organic matter (DOM): further determination of the chemical compounds present in high molecular weight DOM ...
  • Chemical composition and potential environmental impacts of water-soluble polar crude oil components inferred from ESI FT-ICR MS 

    Liu, Yina; Kujawinski, Elizabeth B. (Public Library of Science, 2015-09-01)
    Polar petroleum components enter marine environments through oil spills and natural seepages each year. Lately, they are receiving increased attention due to their potential toxicity to marine organisms and persistence in ...
  • Chemical composition of the graphitic black carbon fraction in riverine and marine sediments at sub-micron scales using carbon X-ray spectromicroscopy 

    Haberstroh, Paul R.; Brandes, Jay A.; Gelinas, Yves; Dickens, Angela F.; Wirick, Sue; Cody, George D. (2005-12-01)
    The chemical composition of the graphitic black carbon (GBC) fraction of marine organic matter was explored in several marine and freshwater sedimentary environments along the west coast of North America and the Pacific ...
  • Chemical data quantify Deepwater Horizon hydrocarbon flow rate and environmental distribution 

    Ryerson, Thomas B.; Camilli, Richard; Kessler, John D.; Kujawinski, Elizabeth B.; Reddy, Christopher M.; Valentine, David L.; Atlas, Elliot; Blake, Donald R.; de Gouw, Joost; Meinardi, Simone; Parrish, David D.; Peischl, Jeff; Seewald, Jeffrey S.; Warneke, Carsten (2011-11-11)
    Detailed airborne, surface, and subsurface chemical measurements, primarily obtained in May and June 2010, are used to quantify initial hydrocarbon compositions along different transport pathways – in deep subsurface plumes, ...
  • Chemistry of hot springs along the Eastern Lau Spreading Center 

    Mottl, Michael J.; Seewald, Jeffrey S.; Wheat, C. Geoffrey; Tivey, Margaret K.; Michael, Peter J.; Proskurowski, Giora; McCollom, Thomas M.; Reeves, Eoghan P.; Sharkey, Jessica; You, Chen-Feng; Chan, Lui-Heung; Pichler, Thomas (2010-12-08)
    The Eastern Lau Spreading Center (ELSC) is the southernmost part of the back-arc spreading axis in the Lau Basin, west of the Tonga trench and the active Tofua volcanic arc. Over its 397-km length it exhibits large and ...
  • The chemistry, biology, and vertical flux of oceanic particulate matter 

    Bishop, James K. B. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1977-01)
    Particulate matter samples, split into <l μm, 1-53 μm, and >53 μm size fractions have been obtained using a Large Volume in situ Filtration System (LVFS) during the SOUTHLANT expedition, R/V CHAIN 115. Profiles to 400 ...
  • Chlorophyll diagenesis in the water column and sediments of the Black Sea 

    King, Linda L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1992-11)
    This thesis examines the degradation pathways of chlorophyll in the Black Sea water column and sediments. Measurements are made of total chlorophyll in sediment traps from two locations and depths in the water column, ...
  • A Climate Change Atlas for the Ocean 

    Boyd, Philip W.; Law, Cliff S.; Doney, Scott C. (Oceanography Society, 2011-06)
    At both regional and national levels, there is an urgent need to develop a clear picture of how climate change will alter multiple environmental properties in the ocean. Specifically, what will such cumulative alterations ...
  • Climate variability of southern Chile since the Last Glacial Maximum : a continuous sedimentological record from Lago Puyehue (40°S) 

    Bertrand, Sebastien; Charlet, Francois; Charlier, Bernard; Renson, Virginie; Fagel, Nathalie (2007-04-29)
    This paper presents a multi-proxy climate record of an 11 m long core collected in Lago Puyehue (southern Chile, 40°S) and extending back to 18,000 cal yr BP. The multi-proxy analyses include sedimentology, mineralogy, ...
  • Climate-driven sea level anomalies modulate coastal groundwater dynamics and discharge 

    Gonneea, Meagan E.; Mulligan, Ann E.; Charette, Matthew A. (John Wiley & Sons, 2013-06-03)
    To better understand the physical drivers of submarine groundwater discharge (SGD) in the coastal ocean, we conducted a detailed field and modeling study within an unconfined coastal aquifer system. We monitored the hydraulic ...
  • Climate-induced interannual variability of marine primary and export production in three global coupled climate carbon cycle models 

    Schneider, B.; Bopp, Laurent; Gehlen, M.; Segschneider, J.; Frolicher, T. L.; Cadule, P.; Friedlingstein, Pierre; Doney, Scott C.; Behrenfeld, Michael J.; Joos, Fortunat (Copernicus Publications on behalf of the European Geosciences Union, 2008-04-23)
    Fully coupled climate carbon cycle models are sophisticated tools that are used to predict future climate change and its impact on the land and ocean carbon cycles. These models should be able to adequately represent natural ...
  • Climate-mediated changes to mixed-layer properties in the Southern Ocean : assessing the phytoplankton response 

    Boyd, Philip W.; Doney, Scott C.; Strzepek, R.; Dusenberry, Jeffrey A.; Lindsay, Keith; Fung, Inez Y. (Copernicus Publications on behalf of the European Geosciences Union, 2008-05-19)
    Concurrent changes in ocean chemical and physical properties influence phytoplankton dynamics via alterations in carbonate chemistry, nutrient and trace metal inventories and upper ocean light environment. Using a fully ...
  • Climate–carbon cycle feedback analysis : results from the C4MIP model intercomparison 

    Friedlingstein, Pierre; Cox, P.; Betts, R.; Bopp, Laurent; von Bloh, W.; Brovkin, V.; Cadule, P.; Doney, Scott C.; Eby, Michael; Fung, Inez Y.; Bala, G.; John, Jasmin G.; Jones, C. D.; Joos, Fortunat; Kato, T.; Kawamiya, M.; Knorr, W.; Lindsay, Keith; Matthews, H. D.; Raddatz, T.; Rayner, Peter; Reick, C.; Roeckner, E.; Schnitzler, K.-G.; Schnur, R.; Strassmann, K.; Weaver, Andrew J.; Yoshikawa, C.; Zeng, Ning (American Meteorological Society, 2006-07-15)
    Eleven coupled climate–carbon cycle models used a common protocol to study the coupling between climate change and the carbon cycle. The models were forced by historical emissions and the Intergovernmental Panel on Climate ...
  • Climatically driven emissions of hydrocarbons from marine sediments during deglaciation 

    Hill, T. M.; Kennett, J. P.; Valentine, David L.; Yang, Z.; Reddy, Christopher M.; Nelson, Robert K.; Behl, R. J.; Robert, C.; Beaufort, L. (2006-07-31)
    Marine hydrocarbon seepage emits oil and gas, including methane (~30 Tg CH4/year), to the ocean and atmosphere. Sediments from the California margin contain preserved tar, primarily formed via hydrocarbon weathering at ...
  • The CLIMODE field campaign : observing the cycle of convection and restratification over the Gulf Stream 

    Marshall, John C.; Ferrari, Raffaele; Forget, G.; Maze, G.; Andersson, A.; Bates, Nicholas R.; Dewar, William K.; Doney, Scott C.; Fratantoni, David M.; Joyce, Terrence M.; Straneo, Fiamma; Toole, John M.; Weller, Robert A.; Edson, James B.; Gregg, M. C.; Kelly, Kathryn A.; Lozier, M. Susan; Palter, Jaime B.; Lumpkin, Rick; Samelson, Roger M.; Skyllingstad, Eric D.; Silverthorne, Katherine E.; Talley, Lynne D.; Thomas, Leif N. (American Meteorological Society, 2009-09)
    A major oceanographic field experiment is described, which is designed to observe, quantify, and understand the creation and dispersal of weakly stratified fluid known as “mode water” in the region of the Gulf Stream. ...
  • Cloud condensation nucleus activity comparison of dry- and wet-generated mineral dust aerosol : the significance of soluble material 

    Garimella, S.; Huang, Y.-W.; Seewald, Jeffrey S.; Cziczo, D. J. (Copernicus Publications on behalf of the European Geosciences Union, 2014-06-18)
    This study examines the interaction of clay mineral particles and water vapor for determining the conditions required for cloud droplet formation. Droplet formation conditions are investigated for two common clay minerals, ...