Now showing items 3189-3208 of 5448

    • Multibeam bathymetric surveys of submarine volcanoes and mega-pockmarks on the Chatham Rise, New Zealand 

      Collins, John A.; Molnar, Peter H.; Sheehan, Anne F. (2011-04)
      Multibeam bathymetric surveys east of the South Island of New Zealand present images of submarine volcanoes and pockmarks west of Urry Knolls on the Chatham Rise, and evidence of submarine erosion on the southern margin ...
    • Multicarrier communication over underwater acoustic channels with nonuniform Doppler shifts 

      Li, Baosheng; Zhou, Shengli; Stojanovic, Milica; Freitag, Lee E.; Willett, Peter (IEEE, 2008-04)
      Underwater acoustic (UWA) channels are wideband in nature due to the small ratio of the carrier frequency to the signal bandwidth, which introduces frequency-dependent Doppler shifts. In this paper, we treat the channel ...
    • Multicentury changes in ocean and land contributions to the climate-carbon feedback 

      Randerson, James T.; Lindsay, Keith; Munoz, E.; Fu, W.; Moore, J. Keith; Hoffman, Forrest M.; Mahowald, Natalie M.; Doney, Scott C. (John Wiley & Sons, 2015-06-02)
      Improved constraints on carbon cycle responses to climate change are needed to inform mitigation policy, yet our understanding of how these responses may evolve after 2100 remains highly uncertain. Using the Community Earth ...
    • Multichannel detection for wideband underwater acoustic CDMA communications 

      Stojanovic, Milica; Freitag, Lee E. (IEEE, 2006-07)
      Direct-sequence (DS) code-division multiple access (CDMA) is considered for future wideband mobile underwater acoustic networks, where a typical configuration may include several autonomous underwater vehicles (AUVs) ...
    • Multichannel maximum entropy method of spectral analysis applied to offshore structures 

      Briggs, Michael Jeffrey (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1981-06)
      The multichannel Maximum Entropy Method (MEM) of spectral analysis is developed and applied in the dynamic analysis of offshore structures. Two different algorithms are implemented and compared with the conventional ...
    • A multicoral calibration method to approximate a universal equation relating Sr/Ca and growth rate to sea surface temperature 

      Goodkin, Nathalie F.; Hughen, Konrad A.; Cohen, Anne L. (American Geophysical Union, 2007-03-01)
      Combining strontium-to-calcium ratios (Sr/Ca) with mean annual growth rates in Bermuda Diploria labyrinthiformis (brain corals) is shown to improve sea surface temperature (SST) calibrations relative to instrumental data. ...
    • Multidecadal mobility of the North Atlantic Oscillation 

      Moore, G. W. K.; Renfrew, Ian A.; Pickart, Robert S. (American Meteorological Society, 2013-04-15)
      The North Atlantic Oscillation (NAO) is one of the most important modes of variability in the global climate system and is characterized by a meridional dipole in the sea level pressure field, with centers of action near ...
    • A multidisciplinary Amazon Shelf SEDiment Study (AmasSeds) : physical oceanography moored array component 

      Alessi, Carol A.; Lentz, Steven J.; Beardsley, Robert C.; Castro, Belmiro Mendes; Geyer, W. Rockwell (Woods Hole Oceanographic Institution, 1992-09)
      A Multidisciplinary Amazon Shelf SEDiment Study (AmasSeds) is a cooperative research program by geological, chemical, physical, and biological oceanographers from Brazil and the United States to study sedimentary processes ...
    • Multimolecular tracers of terrestrial carbon transfer across the pan-Arctic : 14C characteristics of sedimentary carbon components and their environmental controls 

      Feng, Xiaojuan; Gustafsson, Orjan; Holmes, Robert M.; Vonk, Jorien E.; van Dongen, Bart E.; Semiletov, Igor P.; Dudarev, Oleg V.; Yunker, Mark B.; Macdonald, Robie W.; Wacker, Lukas; Montlucon, Daniel B.; Eglinton, Timothy I. (John Wiley & Sons, 2015-11-02)
      Distinguishing the sources, ages, and fate of various terrestrial organic carbon (OC) pools mobilized from heterogeneous Arctic landscapes is key to assessing climatic impacts on the fluvial release of carbon from permafrost. ...
    • Multipath time-delay estimation via the EM algorithm 

      Feder, Meir; Weinstein, Ehud (Woods Hole Oceanographic Institution, 1987-01)
      We consider the application of the EM algorithm to the multipath time delay estimation problem. The algorithm is developed for the case of deterministic (known) signals, as well as for the case of wide-sense stationary ...
    • Multiple approaches to microbial source tracking in tropical northern Australia 

      Neave, Matthew; Luter, Heidi; Padovan, Anna; Townsend, Simon; Schobben, Xavier; Gibb, Karen (John Wiley & Sons, 2014-09-16)
      Microbial source tracking is an area of research in which multiple approaches are used to identify the sources of elevated bacterial concentrations in recreational lakes and beaches. At our study location in Darwin, northern ...
    • Multiple convergence zone acoustic telemetry feasibility test report 

      Catipovic, Josko A.; von der Heydt, Keith; Merriam, John Stevens; Sandsmark, Geir Helge (Woods Hole Oceanographic Institution, 1991-11)
      This report describes a multiple CZ acoustic telemetry experiment conducted off the coast of California 1/28/90-2/2/90. The goal was to design a maximally robust high speed underwater modem suitable for data telemetry for ...
    • Multiple equilibria and low-frequency variability of wind-driven ocean models 

      Primeau, Francois W. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1998-06)
      The steady states of two models of the double-gyre wind-driven ocean circulation are studied. The link between the steady state solutions of the models and their time-mean and low-frequency variability is explored to ...
    • Multiple expressions of plume-ridge interaction in the Galapagos : volcanic lineaments and ridge jumps 

      Mittelstaedt, Eric; Soule, Samuel A.; Harpp, Karen S.; Fornari, Daniel J.; McKee, C.; Tivey, Maurice A.; Geist, Dennis J.; Kurz, Mark D.; Sinton, Christopher; Mello, C. (American Geophysical Union, 2012-05-31)
      Anomalous volcanism and tectonics between near-ridge mantle plumes and mid-ocean ridges provide important insights into the mechanics of plume-lithosphere interaction. We present new observations and analysis of multibeam, ...
    • The multiple fates of sinking particles in the North Atlantic Ocean 

      Collins, James R.; Edwards, Bethanie R.; Thamatrakoln, Kimberlee; Ossolinski, Justin E.; DiTullio, Giacomo R.; Bidle, Kay D.; Doney, Scott C.; Van Mooy, Benjamin A. S. (John Wiley & Sons, 2015-09-25)
      The direct respiration of sinking organic matter by attached bacteria is often invoked as the dominant sink for settling particles in the mesopelagic ocean. However, other processes, such as enzymatic solubilization and ...
    • A multiple proxy and model study of Cretaceous upper ocean temperatures and atmospheric CO2 concentrations 

      Bice, Karen L.; Birgel, Daniel; Meyers, Philip A.; Dahl, Kristina A.; Hinrichs, Kai-Uwe; Norris, Richard D. (American Geophysical Union, 2006-04-08)
      We estimate tropical Atlantic upper ocean temperatures using oxygen isotope and Mg/Ca ratios in well-preserved planktonic foraminifera extracted from Albian through Santonian black shales recovered during Ocean Drilling ...
    • Multiple source location estimation using the EM Algorithm 

      Weinstein, Ehud; Feder, Meir (Woods Hole Oceanographic Institution, 1986-07)
      We present a computationally efficient scheme for multiple source location estimation based on the EM Algorithm. The proposed scheme is optimal in the sense that it converges iteratively to the exact Maximum Likelihood ...
    • Multiple stressors of ocean ecosystems in the 21st century : projections with CMIP5 models 

      Bopp, Laurent; Resplandy, L.; Orr, James C.; Doney, Scott C.; Dunne, John P.; Gehlen, M.; Halloran, P.; Heinze, Christoph; Ilyina, T.; Seferian, Roland; Tjiputra, Jerry; Vichi, Marcello (Copernicus Publications on behalf of the European Geosciences Union, 2013-10-02)
      Ocean ecosystems are increasingly stressed by human-induced changes of their physical, chemical and biological environment. Among these changes, warming, acidification, deoxygenation and changes in primary productivity by ...
    • Multiple sulfur isotope constraints on the modern sulfur cycle 

      Tostevin, Rosalie; Turchyn, Alexandra V.; Farquhar, James; Johnston, David T.; Eldridge, Daniel L.; Bishop, James K. B.; McIlvin, Matthew R. (Elsevier, 2014-04-16)
      We present 28 multiple sulfur isotope measurements of seawater sulfate (δ34SSO4δ34SSO4 and Δ33SSO4Δ33SSO4) from the modern ocean over a range of water depths and sites along the eastern margin of the Pacific Ocean. The ...
    • Multiple sulphur and iron isotope composition of detrital pyrite in Archaean sedimentary rocks : a new tool for provenance analysis 

      Hofmann, Axel; Bekker, Andrey; Rouxel, Olivier J.; Rumble, Douglas; Master, Sharad (2009-06-29)
      Multiple S (δ34S and δ33S) and Fe (δ56Fe) isotope analyses of rounded pyrite grains from 3.1 to 2.6 Ga conglomerates of southern Africa indicate their detrital origin, which supports anoxic surface conditions in the Archaean. ...