Now showing items 4819-4838 of 7453

  • Observations of wave orbital scale ripples and a nonequilibrium time-dependent model 

    Traykovski, Peter A. (American Geophysical Union, 2007-06-30)
    Measurements of seafloor ripples under wave-dominated conditions from the LEO15 site and the Martha’s Vineyard coastal observatory were used to develop a time-dependent model for ripple geometry. The measurements consisted ...
  • Observations of wave-mean flow interaction in the Pacific Equatorial Undercurrent 

    Brady, Esther C. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-09)
    The contribution of tropical instability waves to the momentum and energy balances of the Pacific Equatorial Undercurrent is investigated using velocity and temperature time series from the three-dimensional Equatorial Pacific ...
  • Observed 20th century desert dust variability : impact on climate and biogeochemistry 

    Mahowald, Natalie M.; Kloster, S.; Engelstaedter, S.; Moore, J. Keith; Mukhopadhyay, S.; McConnell, Joseph R.; Albani, S.; Doney, Scott C.; Bhattacharya, A.; Curran, M. A. J.; Flanner, M. G.; Hoffman, Forrest M.; Lawrence, David M.; Lindsay, Keith; Mayewski, P. A.; Neff, Jason C.; Rothenberg, D.; Thomas, E.; Thornton, Peter E.; Zender, Charles S. (Copernicus Publications on behalf of the European Geosciences Union, 2010-11-19)
    Desert dust perturbs climate by directly and indirectly interacting with incoming solar and outgoing long wave radiation, thereby changing precipitation and temperature, in addition to modifying ocean and land biogeochemistry. ...
  • Observed and modeled Greenland ice sheet snow accumulation, 1958-2003, and links with regional climate forcing 

    Hanna, Edward; McConnell, Joseph R.; Das, Sarah B.; Cappelen, John; Stephens, Ag (American Meteorological Society, 2006-02-01)
    Annual and monthly snow accumulation for the Greenland Ice Sheet was derived from ECMWF forecasts [mainly 40-yr ECMWR Re-Analysis (ERA-40)] and further meteorological modeling. Modeled accumulation was validated using 58 ...
  • Observed circulation and inferred sediment transport in Hudson Submarine Canyon 

    Hotchkiss, Frances Luellen Stephenson (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1982-05)
    Velocity and temperature time series from Hudson Submarine Canyon and hydrographic surveys of seven canyons of the Middle Atlantic Bight indicate that the effects of storms, tides, and incoming internal waves are intensified ...
  • Observed eastward progression of the Fukushima 134Cs signal across the North Pacific 

    Yoshida, Sachiko; Macdonald, Alison M.; Jayne, Steven R.; Rypina, Irina I.; Buesseler, Ken O. (John Wiley & Sons, 2015-09-09)
    Radionuclide samples taken as part of hydrographic surveys at 30°N in the North Pacific reveal that the easternmost edge of Fukushima-derived 134Cs observed at 174.3°W in 2012 had progressed eastward across the basin to ...
  • Observed limiting cases of horizontal field coherence and array performance in a time-varying internal wavefield 

    Collis, Jon M.; Duda, Timothy F.; Lynch, James F.; DeFerrari, Harry A. (Acoustical Society of America, 2008-08-28)
    Using a moored source and horizontal/vertical line array combination, horizontal coherence properties of high signal to noise ratio (>=20 dB) 100–1600 Hz signals have been measured. Internal waves in the area of the ...
  • The observed state of the energy budget in the early twenty-first century 

    L’Ecuyer, Tristan S.; Beaudoing, Hiroko K.; Rodell, Matthew; Olson, William S.; Lin, B.; Kato, S.; Clayson, Carol A.; Wood, E. F.; Sheffield, Justin; Adler, Robert; Huffman, George J.; Bosilovich, Michael G.; Gu, Guojun; Robertson, F. R.; Houser, Paul R.; Chambers, Don P.; Famiglietti, James S.; Fetzer, Eric J.; Liu, W. Timothy; Gao, X.; Schlosser, C. A.; Clark, Edward A.; Lettenmaier, Dennis P.; Hilburn, K. A. (American Meteorological Society, 2015-11-01)
    New objectively balanced observation-based reconstructions of global and continental energy budgets and their seasonal variability are presented that span the golden decade of Earth-observing satellites at the start of the ...
  • The observed state of the water cycle in the early twenty-first century 

    Rodell, Matthew; Beaudoing, Hiroko K.; L’Ecuyer, Tristan S.; Olson, William S.; Famiglietti, James S.; Houser, Paul R.; Adler, Robert; Bosilovich, Michael G.; Clayson, Carol A.; Chambers, Don P.; Clark, Edward A.; Fetzer, Eric J.; Gao, X.; Gu, Guojun; Hilburn, K. A.; Huffman, George J.; Lettenmaier, Dennis P.; Liu, W. Timothy; Robertson, F. R.; Schlosser, C. A.; Sheffield, Justin; Wood, E. F. (American Meteorological Society, 2015-11-01)
    This study quantifies mean annual and monthly fluxes of Earth’s water cycle over continents and ocean basins during the first decade of the millennium. To the extent possible, the flux estimates are based on satellite ...
  • Observed wintertime tidal and subtidal currents over the continental shelf in the northern South China Sea 

    Li, Ruixiang; Chen, Changsheng; Xia, Huayong; Beardsley, Robert C.; Shi, Maochong; Lai, Zhigang; Lin, Huichan; Feng, Yanqing; Liu, Changjian; Xu, Qichun; Ding, Yang; Zhang, Yu (John Wiley & Sons, 2014-08-19)
    Synthesis analyses were performed to examine characteristics of tidal and subtidal currents at eight mooring sites deployed over the northern South China Sea (NSCS) continental shelf in the 2006–2007 and 2009–2010 winters. ...
  • Observing biogeochemical cycles at global scales with profiling floats and gliders 

    Unknown author (OCB Project Office, 2009-04)
    This Ocean Carbon and Biogeochemistry (OCB) Scoping Workshop focused on the implementation of a long-term observing system for marine biogeochemistry using chemical and biological sensors deployed on autonomous platforms, ...
  • Observing directional properties of ocean swell with an Acoustic Doppler current profiler (ADCP) 

    Herbers, T. H. C.; Lentz, Steven J. (American Meteorological Society, 2010-01)
    Acoustic Doppler current profilers (ADCPs) are widely used for routine measurements of ocean currents and waves in coastal environments. These instruments have the basic capability to measure surface wave frequency–directional ...
  • Observing larval transport processes affecting population connectivity : progress and challenges 

    Gawarkiewicz, Glen G.; Monismith, Stephen G.; Largier, John (Oceanography Society, 2007-09)
    Population connectivity is inherently bio-physical: it is determined by physical transport and dispersion, as well as biological processes such as timing of spawning, larval behavior, and mortality. Knowledge of ...
  • Observing system simulation experiments of dissolved oxygen monitoring in Massachusetts Bay 

    Xue, Pengfei; Chen, Changsheng; Beardsley, Robert C. (American Geophysical Union, 2012-05-08)
    Observing system simulation experiments (OSSEs) were performed in Massachusetts Bay for the design of optimal monitoring sites for dissolved oxygen (DO) measurements. Experiments were carried out using the Ensemble Kalman ...
  • Observing system simulation experiments with ensemble Kalman filters in Nantucket Sound, Massachusetts 

    Xue, Pengfei; Chen, Changsheng; Beardsley, Robert C.; Limeburner, Richard (American Geophysical Union, 2011-01-20)
    Observing system simulation experiments (OSSEs) were performed for Nantucket Sound, Massachusetts, as a pilot study for the design of optimal monitoring networks in the coastal ocean. Experiments were carried out using the ...
  • Observing the Galápagos–EUC interaction : insights and challenges 

    Karnauskas, Kristopher B.; Murtugudde, Raghu; Busalacchi, Antonio J. (American Meteorological Society, 2010-12)
    Although sustained observations yield a description of the mean equatorial current system from the western Pacific to the eastern terminus of the Tropical Atmosphere Ocean (TAO) array, a comprehensive observational dataset ...
  • OC449-09 Data Report : St. Thomas, USVI to Bermuda, December 1-10, 2008 

    Kirincich, Anthony R.; Hodges, Benjamin A.; Fratantoni, David M.; Bahr, Frank B. (Woods Hole Oceanographic Institution, 2009-10)
    Data collected during multiple surveys of hydrography, velocity, and biological quantities are presented from a 9-day cruise aboard the R/V Oceanus near the island of St. Thomas, USVI and a subsequent transit to Bermuda ...
  • Occupational safety and regulatory compliance in US commercial fishing 

    Davis, Mary E. (2010-11-19)
    This study explored occupational safety practices and regulatory compliance in a representative sample of Maine commercial fishing vessels. Data were collected on demographic characteristics, safety equipment and training, ...
  • Ocean acidification 

    Unknown author (OCB Project Office, 2007-10)
    The goal of this workshop was to bring together researchers to discuss potential ocean acidification research projects that support the OCB mission. We specifically wanted to move toward specific implementation strategies ...