Now showing items 3732-3751 of 7453

  • Late Paleogene (Eocene to Oligocene) paleoceanography of the northern North Atlantic 

    Miller, Kenneth George (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1982-10)
    Seismic stratigraphic evidence from the western and northern North Atlantic indicates that a major change in abyssal circulation occurred in the latest Eocene to earliest Oligocene. In the northern North Atlantic, the ...
  • Late Pleistocene-Holocene chemical stratigraphy and paleolimnology of the Rift Valley lakes of central Africa 

    Hecky, Robert E.; Degens, Egon T. (Woods Hole Oceanographic Institution, 1973-05)
    The interaction of climate and geology in Central Africa during Late Pleistocene and Holocene is examined. The study is based on sedimentological and limnological work on the main lakes of the Western Branch of the East ...
  • Late Quaternary climate variability and terrestrial carbon cycling in tropical South America 

    Fornace, Kyrstin L. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2016-02)
    Characterizing global and regional climate variability and climate-carbon cycle interactions in the past provides critical context for evaluating present and future climate trends. In this thesis, I use stable isotope ...
  • Late quaternary sedimentation in the Eastern Angola Basin 

    Bornhold, Brian D. (Woods Hole Oceanographic Institution, 1973-11)
    Recent sedimentation in the eastern Angola Basin includes calcareous oozes in the north and south (Guinea Rise and Walvis Ridge) and hemipelagic lutites and terrigenous turbidites on the Congo Cone and on the Angola rise ...
  • Late Quaternary variability of sedimentary nitrogen isotopes in the eastern South Pacific Ocean 

    De Pol-Holz, Ricardo; Ulloa, Osvaldo; Lamy, Frank; Dezileau, Laurent; Sabatier, Pierre; Hebbeln, Dierk (American Geophysical Union, 2007-05-01)
    We present high-resolution bulk sedimentary δ 15N data from the southern edge of the present-day oxygen minimum zone of the eastern South Pacific. The record is interpreted as representing changes in water column nitrogen ...
  • Lateral circulation and sediment transport driven by axial winds in an idealized, partially mixed estuary 

    Chen, Shih-Nan; Sanford, Lawrence P.; Ralston, David K. (American Geophysical Union, 2009-12-03)
    A 3D hydrodynamic model (ROMS) is used to investigate lateral circulation in a partially mixed estuary driven by axial wind events and to explore the associated transport of sediments. The channel is straight with a ...
  • Lateral continuity of basement seismic reflections in 15 Ma ultrafast-spreading crust at ODP Site 1256 

    Nag, Sreeja; Swift, Stephen A. (2010-07-25)
    The Ocean Drilling Program (ODP) initiated drilling at Site 1256D in the Guatemala Basin, about 1000km off the East Pacific Rise to penetrate plutonic rocks, anticipated to be relatively shallow in this region, formed at ...
  • Lateral coupling in baroclinically unstable flows 

    Spall, Michael A.; Pedlosky, Joseph (American Meteorological Society, 2008-06)
    A two-layer quasigeostrophic model in a channel is used to study the influence of lateral displacements of regions of different sign mean potential vorticity gradient (Πy) on the growth rate and structure of linearly ...
  • Lateral organic carbon supply to the deep Canada Basin 

    Hwang, Jeomshik; Eglinton, Timothy I.; Krishfield, Richard A.; Manganini, Steven J.; Honjo, Susumu (American Geophysical Union, 2008-06-12)
    Understanding the processes driving the carbon cycle in the Arctic Ocean is important for assessing the impacts of the predicted rapid and amplified climate change in this region. We analyzed settling particle samples ...
  • Latin American Regional IAMSLIC Group: the beginning and its results 

    Ramirez Jauregui, Maria Clara (IAMSLIC, 2005)
  • Latitudinal and taxonomic patterns in the feeding ecologies of fish larvae : a literature synthesis 

    Llopiz, Joel K. (2012-03-20)
    The longtime focus on factors that influence the survival of marine fish larvae has yielded an extensive number of studies on larval fish diets and feeding success. In light of a recent increase in such studies within lower ...
  • The LatMix summer campaign : submesoscale stirring in the upper ocean 

    Shcherbina, Andrey Y.; Sundermeyer, Miles A.; Kunze, Eric; D’Asaro, Eric; Badin, Gualtiero; Birch, Daniel; Brunner-Suzuki, Anne-Marie E. G.; Callies, Joern; Cervantes, Brandy T. Kuebel; Claret, Mariona; Concannon, Brian; Early, Jeffrey; Ferrari, Raffaele; Goodman, Louis; Harcourt, Ramsey R.; Klymak, Jody M.; Lee, Craig M.; Lelong, M.-Pascale; Levine, Murray D.; Lien, Ren-Chieh; Mahadevan, Amala; McWilliams, James C.; Molemaker, M. Jeroen; Mukherjee, Sonaljit; Nash, Jonathan D.; Ozgokmen, Tamay M.; Pierce, Stephen D.; Ramachandran, Sanjiv; Samelson, Roger M.; Sanford, Thomas B.; Shearman, R. Kipp; Skyllingstad, Eric D.; Smith, K. Shafer; Tandon, Amit; Taylor, John R.; Terray, Eugene A.; Thomas, Leif N.; Ledwell, James R. (American Meteorological Society, 2015-08)
    Lateral stirring is a basic oceanographic phenomenon affecting the distribution of physical, chemical, and biological fields. Eddy stirring at scales on the order of 100 km (the mesoscale) is fairly well understood and ...
  • Laurentian crustal recycling in the Ordovician Grampian Orogeny : Nd isotopic evidence from western Ireland 

    Draut, Amy E.; Clift, Peter D.; Chew, David M.; Cooper, Matthew J.; Taylor, Rex N.; Hannigan, Robyn E. (Cambridge University Press, 2004-04-21)
    Because magmatism associated with subduction is thought to be the principal source for continental crust generation, assessing the relative contribution of pre-existing (subducted and assimilated) continental material to ...
  • Lava deposition history in ODP Hole 1256D : insights from log-based volcanostratigraphy 

    Tominaga, Masako; Umino, Susumu (American Geophysical Union, 2010-05-11)
    A log-based volcanic stratigraphy of Ocean Drilling Program Hole 1256D provides a vertical cross-section view of in situ upper crust formed at the East Pacific Rise (EPR) with unprecedented resolution. This stratigraphy ...
  • Lava geochemistry as a probe into crustal formation at the East Pacific Rise 

    Perfit, Michael R.; Wanless, V. Dorsey; Ridley, W. Ian; Klein, Emily M.; Smith, Matthew C.; Goss, Adam R.; Hinds, Jillian S.; Kutza, Scott W.; Fornari, Daniel J. (The Oceanography Society, 2012-03)
    Basalt lavas comprise the greatest volume of volcanic rocks on Earth, and most of them erupt along the world's mid-ocean ridges (MORs). These MOR basalts (MORBs) are generally thought to be relatively homogeneous in ...
  • The layer of frictional influence in wind and ocean currents 

    Rossby, Carl-Gustaf; Montgomery, Raymond B. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1935-04)
    The purpose of the present paper is to analyze, in a reasonably comprehensive fashion, the principal factors controlling the mean state of turbulence and hence the mean velocity distribution in wind and ocean currents ...
  • LCSH and the ASFIS Thesaurus: an update 

    Markham, James W.; Avery, Beth (IAMSLIC, 1999)
  • Leaf litter nutrient uptake in an intermittent blackwater river : influence of tree species and associated biotic and abiotic drivers 

    Mehring, Andrew S.; Kuehn, Kevin A.; Thompson, Aaron; Pringle, Catherine M.; Rosemond, Amy D.; First, Matthew R.; Lowrance, R. Richard; Vellidis, George (2014-12)
    Organic matter may sequester nutrients as it decomposes, increasing in total N and P mass via multiple uptake pathways. During leaf litter decomposition, microbial biomass and accumulated inorganic materials immobilize and ...
  • Leaf wax biomarkers in transit record river catchment composition 

    Ponton, Camilo; West, A. Joshua; Feakins, Sarah J.; Galy, Valier (John Wiley & Sons, 2014-09-24)
    Rivers carry organic molecules derived from terrestrial vegetation to sedimentary deposits in lakes and oceans, storing information about past climate and erosion, as well as representing a component of the carbon cycle. ...
  • Learning commons planning: one size does not fit all 

    Heckman, Jan E.; Heckman, Mary V. (IAMSLIC, 2009)