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Browsing by Author "Vickers, Dean"

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Browsing by Author "Vickers, Dean"

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  • Atmospheric inverse modeling to constrain regional-scale CO₂ budgets at high spatial and temporal resolution 
    Gockede, Mathias; Michalak, Anna M.; Vickers, Dean; Turner, David P.; Law, Beverly E. (American Geophysical Union, 2010)
    We present an inverse modeling framework designed to constrain CO2 budgets at regional scales. The approach captures atmospheric transport processes in high spatiotemporal resolution by coupling a mesoscale model with La ...
  • The Cospectral Gap and Turbulent Flux Calculations 
    Vickers, Dean; Mahrt, L. (American Meteorological Society, 2003-05)
    An alternative method to Fourier analysis is discussed for studying the scale dependence of variances and covariances in atmospheric boundary layer time series. Unlike Fourier decomposition, the scale dependence based on ...
  • The Coupled Boundary Layers and Air–Sea Transfer Experiment in Low Winds 
    Edson, James; Crawford, Timothy; Crescenti, Jerry; Farrar, Tom; Frew, Nelson; Gerbi, Greg; Helmis, Costas; Hristov, Tihomir; Khelif, Djamal; Jessup, Andrew; Jonsson, Haf; Li, Ming; Mahrt, Larry; McGillis, Wade; Plueddemann, Albert; Shen, Lian; Skyllingstad, Eric; Stanton, Tim; Sullivan, Peter; Sun, Jielun; Trowbridge, John; Vickers, Dean; Wang, Shouping; Wang, Qing; Weller, Robert; Wilkin, John; Williams, Albert J. III; Yue, D. K. P.; Zappa, Chris (American Meteorological Society, 2007-03)
    The Office of Naval Research's Coupled Boundary Layers and Air–Sea Transfer (CBLAST) program is being conducted to investigate the processes that couple the marine boundary layers and govern the exchange of heat, mass, a ...
  • Dependence of Turbulent and Mesoscale Velocity Variances on Scale and Stability 
    Mahrt, L.; Moore, Erin; Vickers, Dean; Jensen, N. O. (American Meteorological Society, 2001-03)
    The scale dependence of velocity variances is studied using data collected from a grassland site, a heather site, and four forested sites. The dependence of velocity variances on averaging time, used to define the fluctu ...
  • Displacement Measurement Errors from Moving Platforms 
    Mahrt, L.; Vickers, Dean; Drennan, William M.; Graber, Hans C.; Crawford, Timothy L. (American Meteorological Society, 2005-07)
    Errors in eddy correlation measurements from moving platforms (aircraft, ships, buoys, blimps, tethered balloons, and kites) include contamination of the measured fluctuations by superficial fluctuations associated with ...
  • Estimates for wet and dry removals' contribution to the residence time for atmospheric pollutants in the eastern United States 
    Vickers, Dean (1979-03-14)
    The length of time that atmospheric pollutants released from low-level sources in the midwestern United States can expect to remain in the atmosphere is discussed. The pollution is assumed to be removed from the atmos ...
  • Estimates of the 10-m Neutral Sea Surface Drag Coefficient from Aircraft Eddy-Covariance Measurements 
    Vickers, Dean; Mahrt, Larry; Andreas, Edgar L. (American Meteorological Society, 2013-02)
    The 10-m neutral drag coefficient (C[subscript DN10]) over the sea is calculated using a large observational dataset consisting of 5800 estimates of the mean flow and the fluxes from aircraft eddy-covariance measurements ...
  • Evaluation of the air-sea bulk formula and sea-surface temperature variability from observations 
    Vickers, Dean; Mahrt, Larry (American Geophysical Union, 2006-05-02)
  • Five years of carbon fluxes and inherent water-use efficiency at two semi-arid pine forests with different disturbance histories 
    Vickers, Dean; Thomas, Christoph K.; Pettijohn, Cory; Martin, Jon G.; Law, Beverly E. (International Meteorological Institute in Stockholm, 2012-02-13)
    Five years of eddy-covariance and other measurements at a mature ponderosa pine forest and a nearby young plantation are used to contrast the carbon fluxes for long-term averages, seasonal patterns, diel patterns and int ...
  • Formulation of Turbulent Fluxes in the Stable Boundary Layer 
    Mahrt, L.; Vickers, Dean (American Meteorological Society, 2003-10)
    The mixing lengths for heat and momentum are computed from seven levels of eddy correlation data during the Cooperative Atmosphere–Surface Exchange Study-1999 (CASES-99). A number of formulations of the mixing length a ...
  • Momentum transfer over the coastal zone 
    Sun, Jielun; Vandemark, Douglas; Mahrt, Larry; Vickers, Dean; Crawford, Timothy; Vogel, Christoph (American Geophysical Union, 2001-06-27)
    Spatial variations of surface stress over the coastal shoaling zone are studied offshore of Duck, North Carolina, by the LongEZ research aircraft, equipped to measure both atmospheric turbulence and oceanic waves. We fin ...
  • A New Drag Relation for Aerodynamically Rough Flow over the Ocean 
    Andreas, Edgar L.; Mahrt, Larry; Vickers, Dean (American Meteorological Society, 2012-08)
    See article for Abstract
  • Nocturnal subcanopy flow regimes and missing carbon dioxide 
    Vickers, Dean; Irvine, James; Martin, Jonathan G.; Law, Beverly E. (Elsevier, 2012-01-15)
    Two distinct nocturnal subcanopy flow regimes are observed beneath a tall (16 m) open pine forest canopy. The first is characterized by weaker mixing, stronger stability, westerly downslope flow decoupled from the flow a ...
  • Numerical Simulation of Boundary Layer Structure and Cross-Equatorial Flow in the Eastern Pacific 
    Small, R. Justin; Xie, Shang-Ping; Wang, Yuqing; Esbensen, Steven K.; Vickers, Dean (American Meteorological Society, 2005-06)
    Recent observations from spaceborne microwave sensors have revealed detailed structure of the surface flow over the equatorial eastern Pacific in the boreal fall season. A marked acceleration of surface wind across the ...
  • Observations of Fluxes and Inland Breezes over a Heterogeneous Surface 
    Mahrt, L.; Sun, Jielun; Vickers, Dean; MacPherson, J. I.; Pederson, J. R.; Desjardins, R. L. (American Meteorological Society, 1994-09-01)
    Repeated aircraft runs at about 33 m over heterogeneous terrain are analyzed to study the spatial variability of the mesoscale flow and turbulent fluxes. An irrigated area, about 12 km across, generates a relatively cool ...
  • Observations of non-dimensional wind shear in the coastal zone 
    Vickers, Dean; Mahrt, Larry (1999)
    Vertical profiles of the time-averaged wind stress, wind speed and buoyancy flux from the off-shore tower site in the Risø Air Sea Experiment are used to evaluate similarity theory in the coastal zone. The observed depen ...
  • Quality Control and Flux Sampling Problems for Tower and Aircraft Data 
    Vickers, Dean; Mahrt, L. (American Meteorological Society, 1997-06)
    A series of automated tests is developed for tower and aircraft time series to identify instrumentation problems, flux sampling problems, and physically plausible but unusual situations. The automated procedures serve as ...
  • Sea surface drag coefficients in the Risø Air Sea Experiment 
    Mahrt, Larry; Vickers, Dean; Howell, Jim; Hojstrup, Jorgen; Wilczak, James M.; Edson, Jim; Hare, Jeffrey (American Geophysical Union, 1996-06-15)
    This study examines the dependence of the computed drag coefficient on wind speed, stability, fetch, flux sampling problems, and method of calculation of the drag coefficient. The analysis is applied to data collected at ...
  • Sea-surface aerodynamic roughness 
    Mahrt, Larry; Vickers, Dean; Fredrickson, Paul; Davidson, Ken; Smedman, Ann-Sofi (American Geophysical Union, 2003-06-03)
    This study surveys and evaluates similarity theory for estimating the sea-surface drag coefficient with the bulk aerodynamic method. The most commonly used formulations of the aerodynamic roughness length, required by si ...
  • Sensible Heat Flux in Near-Neutral Conditions over the Sea 
    Mahrt, L.; Vickers, Dean; Andreas, Edgar L.; Khelif, Djamal (American Meteorological Society, 2012-07)
    The variation of the sea surface sensible heat flux is investigated using data from the Gulf of Tehuantepec Experiment (GOTEX) and from eight additional aircraft datasets representing a variety of surface conditions. Thi ...

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