Now showing items 108-127 of 1216

    • The CAFE Experiment : a joint seismic and MT investigation of the Cascadia Subduction System 

      McGary, R Shane (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2013-02)
      In this thesis we present results from inversion of data using dense arrays of collocated seismic and magnetotelluric stations located in the Cascadia subduction zone region of central Washington. In the migrated seismic ...
    • Calcification by juvenile corals under heterotrophy and elevated CO2 

      Drenkard, Elizabeth J.; Cohen, Anne L.; McCorkle, Daniel C.; de Putron, Samantha J.; Starczak, Victoria R.; Zicht, A. E. (2013-12)
      Ocean acidification (OA) threatens the existence of coral reefs by slowing the rate of calcium carbonate (CaCO3) production of framework-building corals thus reducing the amount of CaCO3 the reef can produce to counteract ...
    • Calibration and application of B/Ca, Cd/Ca, and δ11B in Neogloboquadrina pachyderma (sinistral) to constrain CO2 uptake in the subpolar North Atlantic during the last deglaciation 

      Yu, Jimin; Thornalley, David J. R.; Rae, James W. B.; McCave, I. Nick (John Wiley & Sons, 2013-05-30)
      The North Atlantic and Norwegian Sea are prominent sinks of atmospheric CO2 today, but their roles in the past remain poorly constrained. In this study, we attempt to use B/Ca and δ11B ratios in the planktonic foraminifera ...
    • Calibration of the carbon isotope composition (δ13C) of benthic foraminifera 

      Schmittner, Andreas; Bostock, Helen; Cartapanis, olivier; Curry, William B.; Filipsson, Helena L.; Galbraith, Eric D.; Gottschalk, Julia; Herguera, Juan Carlos; Hoogakker, Babette; Jaccard, Samuel L.; Lisiecki, Lorraine E.; Lund, David C.; Martínez Méndez, Gema; Lynch-Stieglitz, Jean; Mackensen, Andreas; Michel, Elisabeth; Mix, Alan C.; Oppo, Delia W.; Peterson, Carlye D.; Repschläger, Janne; Sikes, Elisabeth L.; Spero, Howard J.; Waelbroeck, Claire (John Wiley & Sons, 2017-06-03)
      The carbon isotope composition (δ13C) of seawater provides valuable insight on ocean circulation, air-sea exchange, the biological pump, and the global carbon cycle and is reflected by the δ13C of foraminifera tests. Here ...
    • Can paleoceanographic tracers constrain meridional circulation rates? 

      Huybers, Peter; Gebbie, Geoffrey A.; Marchal, Olivier (American Meteorological Society, 2007-02)
      The ability of paleoceanographic tracers to constrain rates of transport is examined using an inverse method to combine idealized observations with a geostrophic model. Considered are the spatial distribution, accuracy, ...
    • Can we distinguish canonical El Niño from Modoki? 

      Karnauskas, Kristopher B. (John Wiley & Sons, 2013-10-09)
      Following the recent discovery of the “Modoki” El Niño, a proliferation of studies and debates has ensued concerning whether Modoki is dynamically distinct from “Canonical” El Niño, how Modoki impacts and teleconnections ...
    • The carbon cycle and associated redox processes through time 

      Hayes, John M.; Waldbauer, Jacob R. (2006-01-24)
      Earth’s biogeochemical cycle of carbon delivers both limestones and organic materials to the crust. In numerous, biologically catalyzed redox reactions, hydrogen, sulfur, iron, and oxygen serve prominently as electron ...
    • Carbon dynamics in the western Arctic Ocean : insights from full-depth carbon isotope profiles of DIC, DOC, and POC 

      Griffith, David R.; McNichol, Ann P.; Xu, Li; McLaughlin, Fiona A.; Macdonald, Robie W.; Brown, Kristina A.; Eglinton, Timothy I. (Copernicus Publications on behalf of the European Geosciences Union, 2012-03-28)
      Arctic warming is projected to continue throughout the coming century. Yet, our currently limited understanding of the Arctic Ocean carbon cycle hinders our ability to predict how changing conditions will affect local ...
    • Carbon isotope (δ13Ccarb) heterogeneity in deep-water Cambro-Ordovician carbonates, western Newfoundland 

      Pruss, Sara; Castagno, Katherine; FIke, David; Hurtgen, Matthew (2015-10-09)
      Carbonates of western Newfoundland span the Cambro-Ordovician interval and preserve a record of slope-basinal deposition in the Cow Head Group near Cow Head. This unit consists of conglomerates and ribbon and laminated ...
    • Carbon isotopic evidence for microbial control of carbon supply to Orca Basin at the seawater–brine interface 

      Shah, Sunita R.; Joye, Samantha B.; Brandes, Jay A.; McNichol, Ann P. (Copernicus Publications on behalf of the European Geosciences Union, 2013-05-13)
      Orca Basin, an intraslope basin on the Texas-Louisiana continental slope, hosts a hypersaline, anoxic brine in its lowermost 200 m in which limited microbial activity has been reported. This brine contains a large reservoir ...
    • Carbon nanotube foils for electron stripping in tandem accelerators 

      von Reden, Karl F.; Zhang, Mei; Meigs, Martha; Sichel, Enid; Fang, Shaoli; Baughman, Ray H. (2007-03)
      Carbon nanotube technology has rapidly advanced in recent years, making it possible to create meter-long, ~4 cm wide films of multi-walled tubes of less than 3 μg/cm2 areal density in a bench top open-air procedure [1]. ...
    • Carbonate as sputter target material for rapid 14C AMS 

      Longworth, Brett E.; Robinson, Laura F.; Roberts, Mark L.; Beaupre, Steven R.; Burke, Andrea; Jenkins, William J. (2012-04-17)
      This paper describes a technique for measuring the 14C content of carbonate samples by producing C-ions directly in the negative ion sputter source of an accelerator mass spectrometer (AMS) system. This direct analysis ...
    • A cartographical perspective to the engineering works at the Sulina mouth, the Danube Delta 

      Constantinescu, Stefan; Giosan, Liviu; Vespremeanu-Stroe, A. (2009-06-19)
      From 1856 to 1939, the European Commission of the Danube (ECD), was responsible for technical surveys at the mouth of Sulina arm. During this period, ECD prepared general maps of Danube Delta as well as detailed charts ...
    • The Cascadia Initiative : a sea change In seismological studies of subduction zones 

      Toomey, Douglas R.; Allen, Richard M.; Barclay, Andrew H.; Bell, Samuel W.; Bromirski, Peter D.; Carlson, Richard L.; Chen, Xiaowei; Collins, John A.; Dziak, Robert P.; Evers, Brent; Forsyth, Donald W.; Gerstoft, Peter; Hooft, Emilie E. E.; Livelybrooks, Dean; Lodewyk, Jessica A.; Luther, Douglas S.; McGuire, Jeffrey J.; Schwartz, Susan Y.; Tolstoy, Maya; Trehu, Anne M.; Weirathmueller, Michelle; Wilcock, William S. D. (The Oceanography Society, 2014-06)
      Increasing public awareness that the Cascadia subduction zone in the Pacific Northwest is capable of great earthquakes (magnitude 9 and greater) motivates the Cascadia Initiative, an ambitious onshore/offshore seismic and ...
    • A catastrophic meltwater flood event and the formation of the Hudson Shelf Valley 

      Thieler, E. Robert; Butman, Bradford; Schwab, William C.; Allison, Mead A.; Driscoll, Neal W.; Donnelly, Jeffrey P.; Uchupi, Elazar (Elsevier B.V., 2007-01-04)
      The Hudson Shelf Valley (HSV) is the largest physiographic feature on the U.S. mid-Atlantic continental shelf. The 150-km long valley is the submerged extension of the ancestral Hudson River Valley that connects to the ...
    • Cemented mounds and hydrothermal sediments on the detachment surface at Kane Megamullion : a new manifestation of hydrothermal venting 

      Tucholke, Brian E.; Humphris, Susan E.; Dick, Henry J. B. (John Wiley & Sons, 2013-09-03)
      Long-lived detachment faults are now known to be important in tectonic evolution of slow-spreading mid-ocean ridges, and there is increasing evidence that fluid flow plays a critical role in development of detachment ...
    • Cenozoic deep-water agglutinated foraminifera in the North Atlantic 

      Kaminski, Michael A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1987-12-04)
      Cenozoic (predominantly Paleogene) "flysch-type" agglutinated foraminiferal assemblages and their modern analogs in the North Atlantic and adjacent areas have been studied to provide an overview of their spatial and ...
    • Cenozoic geology of the continental slope and rise off western Nova Scotia 

      Swift, Stephen A. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1985-10)
      The outer continental margin of Nova Scotia is divided by a diapir province, 40-110 km wide and ~1000km long, that trends subparallel to the shelf edge along the upper continental rise and slope. The growth pattern for ...
    • The centennial and millennial variability of the IndoPacific Warm Pool and the Indonesian Throughflow 

      Gibbons, Fern T. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2012-02)
      As the only low-latitude connection between ocean basins, the Indonesian Throughflow allows the direct transmission of heat and salinity between the Pacific and Indian Oceans. The Mg/Ca and δ1 ...
    • Centennial-to-millennial hydrologic trends and variability along the North Atlantic Coast, USA, during the Holocene 

      Newby, Paige E.; Shuman, Bryan N.; Donnelly, Jeffrey P.; Karnauskas, Kristopher B.; Marsicek, Jeremiah (John Wiley & Sons, 2014-06-25)
      Geophysical and sedimentary records from five lakes in Massachusetts reveal regionally coherent hydrologic variability during the Holocene. All of the lakes have risen since ~9.0 ka, but multicentury droughts after 5.6 ka ...