Now showing items 381-400 of 8539

    • Arc magmas sourced from melange diapirs in subduction zones 

      Marschall, Horst R.; Schumacher, John C. (2012-10-11)
      At subduction zones, crustal material is recycled back into the mantle. A certain proportion, however, is returned to the overriding plate via magmatism. The magmas show a characteristic range of compositions that have ...
    • Arc-continent collisions, sediment recycling and the maintenance of the continental crust 

      Clift, Peter D.; Schouten, Hans A.; Vannucchi, Paola (2008-02-13)
      Subduction zones are both the source of most new continental crust and the locations where crustal material is returned to the upper mantle. Globally the total amount of continental crust and sediment subducted below ...
    • Archaea and bacteria with surprising microdiversity show shifts in dominance over 1,000-year time scales in hydrothermal chimneys 

      Brazelton, William J.; Ludwig, Kristin A.; Sogin, Mitchell L.; Andreishcheva, Ekaterina N.; Kelley, Deborah S.; Shen, Chuan-Chou; Edwards, R. Lawrence; Baross, John A. (2009-12-06)
      The Lost City Hydrothermal Field, an ultramafic-hosted system located 15 km west of the Mid-Atlantic Ridge, has experienced at least 30,000 years of hydrothermal activity. Previous studies have shown that its carbonate ...
    • Archaeal nitrification in the ocean 

      Wuchter, Cornelia; Abbas, Ben; Coolen, Marco J. L.; Herfort, Lydie; van Bleijswijk, Judith; Timmers, Peer; Strous, Marc; Teira, Eva; Herndl, Gerhard J.; Middelburg, Jack J.; Schouten, Stefan; Sinninghe Damste, Jaap S. (2006-01-30)
      Marine Crenarchaeota are the most abundant single group of prokaryotes in the ocean but their physiology and role in marine biogeochemical cycles are unknown. Recently, a member of this clade was isolated from a sea aquarium ...
    • Architecture of North Atlantic contourite drifts modified by transient circulation of the Icelandic mantle plume 

      Parnell-Turner, Ross; White, Nicholas J.; McCave, I. Nick; Henstock, Timothy J.; Murton, Bramley J.; Jones, Stephen M. (John Wiley & Sons, 2015-10-15)
      Overflow of Northern Component Water, the precursor of North Atlantic Deep Water, appears to have varied during Neogene times. It has been suggested that this variation is moderated by transient behavior of the Icelandic ...
    • Archival data projects 

      Crampon, Jean (IAMSLIC, 1999)
    • Archiving, annotating and accessing video as data 

      Connor, Judith (IAMSLIC, 2005)
    • Arctic acoustic tomography : MIZEX 84 

      Spindel, Robert C. (Woods Hole Oceanographic Institution, 1985-04)
      This is the final report of Contract N00014-84-C-0185 between the Woods Hole Oceanographic Institution and the Office of Naval Research for the contract period 1 January, 1984, to 28 February, 1985. This contract supported ...
    • The Arctic and subarctic Ocean flux of potential vorticity and the Arctic Ocean circulation 

      Yang, Jiayan (American Meteorological Society, 2005-12)
      According to observations, the Arctic Ocean circulation beneath a shallow thermocline can be schematized by cyclonic rim currents along shelves and over ridges. In each deep basin, the circulation is also believed to be ...
    • Arctic circulation regimes 

      Proshutinsky, Andrey; Dukhovskoy, Dmitry S.; Timmermans, Mary-Louise; Krishfield, Richard A.; Bamber, Jonathan L. (The Royal Society, 2015-09-07)
      Between 1948 and 1996, mean annual environmental parameters in the Arctic experienced a well-pronounced decadal variability with two basic circulation patterns: cyclonic and anticyclonic alternating at 5 to 7 year intervals. ...
    • Arctic decadal variability : an auto-oscillatory system of heat and fresh water exchange 

      Dukhovskoy, Dmitry S.; Johnson, Mark A.; Proshutinsky, Andrey (American Geophysical Union, 2004-02-05)
      This paper presents a mechanism of decadal variability in the Artic Ocean–GIN Sea (Greenland, Iceland and Norwegian Seas) atmosphere-ice-ocean system. We hypothesize that Arctic variability is regulated by heat and freshwater ...
    • Arctic decadal variability from an idealized atmosphere-ice-ocean model : 2. Simulation of decadal oscillations 

      Dukhovskoy, Dmitry S.; Johnson, Mark; Proshutinsky, Andrey (2006-06-20)
      A simple model of the Arctic Ocean and Greenland Sea, coupled to a thermodynamic sea ice model and an atmospheric model, has been used to study decadal variability of the Arctic ice-ocean-atmosphere climate system. The ...
    • Arctic decadal variability from an idealized atmosphere-ice-ocean model: 1. Model description, calibration, and validation 

      Dukhovskoy, Dmitry S.; Johnson, Mark; Proshutinsky, Andrey (American Geophysical Union, 2006-06-20)
      This paper describes a simple “multibox” model of the Arctic atmosphere-ice-ocean system. The model consists of two major modules (an Arctic module and a Greenland Sea module) and several sub-modules. The Arctic module ...
    • Arctic deltaic lake sediments as recorders of fluvial organic matter deposition 

      Vonk, Jorien E.; Dickens, Angela F.; Giosan, Liviu; Hussain, Zainab A.; Kim, Bokyung; Zipper, Samuel C.; Holmes, Robert M.; Montlucon, Daniel B.; Galy, Valier; Eglinton, Timothy I. (Frontiers Media, 2016-08-17)
      Arctic deltas are dynamic and vulnerable regions that play a key role in land-ocean interactions and the global carbon cycle. Delta lakes may provide valuable historical records of the quality and quantity of fluvial fluxes, ...
    • An Arctic ecosystem : the coastal tundra at Barrow, Alaska 

      Brown, Jerry; Miller, Philip C.; Tieszen, Larry L.; Bunnell, Fred (Dowden, Hutchinson & Ross, Inc., 1980)
      From the Foreward: This book is one of a series of volumes reporting results of research by U. S. scientists participating in the International Biological Program (IBP). As one of the 58 nations taking part in the IBP ...
    • The Arctic Environmental Drifting Buoy (AEDB) : report of field operations and results, August, 1987 - April 1988 

      Honjo, Susumu; Krishfield, Richard A.; Plueddemann, Albert J. (Woods Hole Oceanographic Institution, 1990-01)
      There are strong reasons to gather data on polar oceanogrphy and climatology in real time using fully automated, unattended instrumentation systems for long periods; particularly during the inaccessible winter months when ...
    • The Arctic freshwater system : changes and impacts 

      White, Daniel; Hinzman, Larry; Alessa, Lilian; Cassano, John; Chambers, Molly; Falkner, Kelly; Francis, Jennifer; Gutowski, William J.; Holland, Marika M.; Holmes, Robert M.; Huntington, Henry; Kane, Douglas; Kliskey, Andrew; Lee, Craig M.; McClelland, James W.; Peterson, Bruce J.; Rupp, T. Scott; Straneo, Fiamma; Steele, Michael; Woodgate, Rebecca; Yang, Daqing; Yoshikawa, Kenji; Zhang, Tingjun (American Geophysical Union, 2007-11-20)
      Dramatic changes have been observed in the Arctic over the last century. Many of these involve the storage and cycling of fresh water. On land, precipitation and river discharge, lake abundance and size, glacier area and ...
    • Arctic Ocean basin liquid freshwater storage trend 1992–2012 

      Rabe, Benjamin; Karcher, Michael; Kauker, Frank; Schauer, Ursula; Toole, John M.; Krishfield, Richard A.; Pisarev, Sergey; Kikuchi, Takashi; Su, J. (John Wiley & Sons, 2014-02-12)
      Freshwater in the Arctic Ocean plays an important role in the regional ocean circulation, sea ice, and global climate. From salinity observed by a variety of platforms, we are able, for the first time, to estimate a ...
    • Arctic Ocean circulation in an idealized numerical model 

      Sugimura, Peter Joseph (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2008-09)
      The mid-to-deep Arctic Ocean is generally characterized by a cyclonic circulation, contained along shelves and ridges. Here we analyze the general Arctic circulation using an idealized numerical model consisting of a ...
    • The Arctic Ocean spices up 

      Timmermans, Mary-Louise; Jayne, Steven R. (American Meteorological Society, 2016-04-05)
      The contemporary Arctic Ocean differs markedly from midlatitude, ice-free, and relatively warm oceans in the context of density-compensating temperature and salinity variations. These variations are invaluable tracers in ...