TITLE

U.S. West Coast Surface Heat Fluxes, Wind Stress, and Wind Stress Curl from a Mesoscale Model

AUTHOR(S)
Haack, Tracy; Burk, S. D.; Hodur, R. M.
PUB. DATE
November 2005
SOURCE
Monthly Weather Review;Nov2005, Vol. 133 Issue 11, p3202
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Monthly averages of numerical model fields are beneficial for depicting patterns in surface forcing such as sensible and latent heat fluxes, wind stress, and wind stress curl over data-sparse ocean regions. Grid resolutions less than 10 km provide the necessary mesoscale detail to characterize the impact of a complex coastline and coastal topography. In the present study a high-resolution mesoscale model is employed to reveal patterns in low-level winds, temperature, relative humidity, sea surface temperature as well as surface fluxes, over the eastern Pacific and along the U.S. west coast. Hourly output from successive 12-h forecasts are averaged to obtain monthly mean patterns from each season of 1999. The averages yield information on interactions between the ocean and the overlying atmosphere and on the influence of coastal terrain forcing in addition to their month-to-month variability. The spring to summer transition is characterized by a dramatic shift in near-surface winds, temperature, and relative humidity as offshore regions of large upward surface fluxes diminish and an alongshore coastal flux gradient forms. Embedded within this gradient, and the imprint of strong summertime topographic forcing, are small-scale fluctuations that vary in concert with local changes in sea surface temperature. Potential feedbacks between the low-level wind, sea surface temperature, and the wind stress curl are explored in the coastal regime and offshore waters. In all seasons, offshore extensions of colder coastal waters impose a marked influence on low-level conditions by locally enhancing stability and reducing the wind speed, while buoy measurements along the coast indicate that sea surface temperatures and wind speeds tend to be negatively correlated.
ACCESSION #
19000525

 

Related Articles

  • A Spectrum-Independent Procedure for Correcting Eddy Fluxes Measured with Separated Sensors. Laubach, Johannes; McNaughton, Keith G. // Boundary-Layer Meteorology;Dec1998, Vol. 89 Issue 3, p445 

    We investigate flux underestimates in eddy correlation measurements that are caused by horizontal separation of the sensors. A common eddy correlation setup consists of a sonic anemometer and a humidity sensor which, because of its bulk, must be placed some distance away from the sonic path,...

  • A Comparison among LATEX, NCEP, and ERS-1 Scatterometer Winds over the Northwestern Gulf of Mexico.  // Journal of Atmospheric & Oceanic Technology;Oct98, Vol. 15 Issue 5, p1204 

    Hourly wind fields for the northwestern Gulf of Mexico (here called LATEX winds) were constructed from in situ measurements for the period April 1992 through November 1994 using statistical (optimal) interpolation. Here the LATEX winds are compared with the National Centers for Environmental...

  • Reducing the Effect of Ground Clutter on Wind Profiler Velocity Measurements. May, Peter T.; Strauch, Richard G. // Journal of Atmospheric & Oceanic Technology;Apr98, Vol. 15 Issue 2, p579 

    It is well known that the presence of ground clutter may severely bias radar measurements of the Doppler shift, particularly with wind profilers undertaking boundary layer measurements. It is shown both qualitatively and quantitatively with simulated data that a simple detrending of the time...

  • Effects of Rain Rate and Wind Magnitude on SeaWinds Scatterometer Wind Speed Errors. Weissman, David E.; Bourassa, Mark A.; Tongue, Jeffrey // Journal of Atmospheric & Oceanic Technology;May2002, Vol. 19 Issue 5, p738 

    Provides information on a study which examined the effects of rain rate and wind magnitude on sea winds scatterometer wind speed errors. Properties of the Next Generation Weather Radar; Issues surrounding electromagnetic backscatter and radar.

  • Vientos troposféricos observados con el radar VHF en Piura-Perú: condiciones normales versus "El Niño 1997-1998". Caucha, Luis Alberto Flores; La Madrid Olivares, Jacqueline; Shing, Jorge Luis Chau Chong // Revista Geofísica;jul-dic2002, Issue 57, p81 

    In this paper, we summarize the statistical characteristics of the horizontal winds observed with the Piura VHF radar between 1991 and 2000. The behavior of horizontal wind is shown. The information, analyzed as a function of the height and hour for different seasons, is presented and discussed...

  • BE A WEATHER WATCHER.  // Old Farmers Almanac for Kids;2013, Vol. 5, p54 

    The article offers information on the practice of observing and recording weather conditions. International weather symbols and their meaning described as well as using the Beaufort Wind Force Scale, a common way of estimating wind speed. A brief historical background on weather reporting in the...

  • An analysis of prediction skill of monthly mean climate variability. Kumar, Arun; Chen, Mingyue; Wang, Wanqiu // Climate Dynamics;Sep2011, Vol. 37 Issue 5/6, p1119 

    In this paper, lead-time and spatial dependence in skill for prediction of monthly mean climate variability is analyzed. The analysis is based on a set of extensive hindcasts from the Climate Forecast System at the National Centers for Environmental Prediction. The skill characteristics of...

  • Meteorological Twin--Twin-Hot Film Anemometry. Thompson, Brian E.; Hassman Jr., Robert C. // Journal of Atmospheric & Oceanic Technology;Apr2001, Vol. 18 Issue 4, p493 

    Presents a study which applied a dual-sensor, twin-hot film anemometer to meteorological measurement of wind velocity in fair and rainy weather. Flow configuration and instrumentation of the anemometer; Dry velocity calibration; Determination of wind magnitude and direction; All-weather algorithm.

  • Evaluating an objective wind analysis technique with a long record of routinely collected data. Ludwig, Francis L.; Sinton, Douglas // Journal of Applied Meteorology;Mar2000, Vol. 39 Issue 3, p335 

    Evaluates the efficiency of the Winds on Critical Streamline Surfaces (WOCSS) objective analysis in estimating wind speed in the San Francisco Bay Area, California. Advantages of the WOCSS model; Comparison between observed and modeled winds; Assessment of the assumptions concerning the...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics