2 edition of Wind stress and wind stress curl over the California current found in the catalog.
Wind stress and wind stress curl over the California current
Craig S Nelson
by Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, for sale by Supt. of Docs., U.S. Govt Print. 0ffice in [Seattle, Wash.], Washington
Written in English
|Statement||Graig S. Nelson ; National Marine Fisheries Service|
|Series||NOAA technical report NMFS SSRF -- 714|
|Contributions||United States. National Marine Fisheries Service|
|The Physical Object|
|Pagination||iii, 87 p. :|
|Number of Pages||87|
The vertical component of the (mathematical) curl of the surface wind stress ∂τ y /∂x - ∂τ x /∂y (with x and y eastward and northward coordinates, and τ x, τ y the corresponding components of the surface stress).The large-scale, long-term averaged wind stress curl contains the principal information to calculate the wind-driven mass transport. The wind stress curl over the South Indian Ocean: seasonal and interannual variability curl spanning the period August June are also processed and provided over a xgrid by CERSAT. We use these data to investigate the wind stress variability in the region around Size: 2MB.
analyzes the wind stresses from QuikSCAT and all three models. Section 5 contains a discussion of the diurnal cycle, section 6 examines the empirical orthogonalfunc-tions (EOFs), section 7 discusses the wind stress curl ﬁelds and winds over the continental shelf, and section 8 contains a summary. 2. Data and model products a. Satellite. Gerritsen, M., Lam, T., Beam, K., Contreras, A., Kovscek, A. Monday Wednesday Friday. am - am.
Seasonal maps of wind stress curl are characterized by positive curls over the western and southwestern gulf. The central result of this study is to document the important role of the mountain chain which extends along the southwestern section of the gulf in channeling the wind toward the Isthmus of Cited by: the wind stress direction is different from that of the mean wind [Zemba and Friehe, , Geernaert, ]. The angle between the stress and mean wind is given by θ=tan−1()v′w′u′w′. (3) Zemba and Friehe () observed large angles between the wind and stress, which they attributed in .
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The wind stress curl is positive near the coast and negative in the region offshore. A line of zero wind stress curl parallels the coast to km offshore, except off central Baja California. The pat- terns of wind stress curl are consistent with the existence of an equatorward Sverdrup transport off. Wind stress and wind stress curl over the California Current (OCoLC) Material Type: Government publication, National government publication, Internet resource: Document Type: Book, Internet Resource: All Authors / Contributors: Craig S Nelson.
Darren Lumbroso, in Floods, Wind analysis. Wind stress can play an important part in piling up water against the coast in areas of shallow water.
The effect is inversely proportional to the water depth. In the southern North Sea and the eastern Irish Sea, the depths of water are relatively shallow (i.e. around 40 m) [WOL 08] and in areas such as these it is important to assess. Skimming the paper, I believe the relevance of the wind stress curl is its relation to "Ekman pumping".
I haven't found a simple, concise reference for this, but this page might be a good start, and this page has a couple of formulas about wind stress curl. I'll try to summarize here. When wind blows over water, the top of the water starts moving. About this Book Catalog Record Details.
Wind stress and wind stress curl over the California Current Nelson, Craig Scott. View full catalog record. Oct Ekman pumping and wind stress curl Balance between Coriolis and the vertical friction mixing of momentum, or stress, leads to Ekman currents.
Integrating this balance vertically (in practice over the top few tens of meters) gives us the Ekman transport. These components of Ekman transport describe depth integrated flow (in m 2 s-1) (i.e. velocity times depth) that is 90 0 to the right.
COAMPS monthly averaged gray shading of wind stress curl (N m −3 × 10 −5) and SST (K) contours, with a contour interval of The stress curl field is shown over a reduced range to emphasize positive and negative regions.
The bold arrows denote the offshore m wind direction as shown in the first column in Fig. Dotted line A–B Cited by: Enriquez and Friehe () computed the wind stress and wind stress curl off the California shelf from aircraft measurements and showed, thanks to numerical experiments with a two layer model and.
In physical oceanography and fluid dynamics, the wind stress is the shear stress exerted by the wind on the surface of large bodies of water – such as oceans, seas, estuaries and is the force component parallel to the surface, per unit area, as applied by the wind on the water wind stress is affected by the wind speed, the shape of the wind waves and the atmospheric.
On average, the amplitude of alongshelf fluctuations in wind stress are 3–4 times larger over the offshore basin, compared to the coastal site, irrespective of whether the fluctuations represent the total, or just the correlated portion of the wind stress field.
The curl in the large-scale wind stress tends to be positive, especially in the. The late summertime wind stress field over the California Current System (CCS) is shown in Fig. During summer and early fall, persistent northerly, upwelling-favorable wind stress dominates the CCS (Fig.
11, left). The wind stress field shows a broad-scale maximum of about N m −2 from °–°N, and °–° by: P FIRST LOOK AT WIND STRESS AND WIND STRESS CURL ALONG CALIFORNIA AND NORTHERN BAJA CALIFORNIA Darko Koračin*1, Clive Dorman2, and Ragothaman Sundararajan1 1Desert Research Institute, Reno, Nevada 2Scripps Institution of Oceanography, San Diego, California * Corresponding author address: Darko Koračin, Desert Research Institute, Reno, NV ; email:.
> gaorz wrote: > > Hi,all of you > > If I have sea surface wind field (u,v), how to obtain the curl of wind > stress by Ferret. > > Surpose U and V are 3D data (X=, Y=> T="apr":"apr":1). > let rho_air =. kg/m^3 let cd = e-3. non-dimensional drag let/title="wind speed"/units="m/s" wmag = (u^2+v^2)^ CHELTON: CALIFORNIA CURRENT RESPONSE TO WIND STRESS CURL FORCING CalCOFI Rep., Vol.
XXIII, I I I 1 I I I I I I I 40 35 30 25 20 I I I I Figure 1. Spring-summer distribution of zooplankton displacement volume in the California Current.
In the summer, wind and stress decrease strongly across the shelf, toward the coast. Combinations of buoys are used to compute the curl of the wind stress over different portions of the shelf. The mean summer curl of the wind stress over the array depends upon the area selected, varying between −×10 −6 and +×10 −6 Pa m − by: Wind stress and Wind Stress Curl products have been computed from daily wind composites, generated using Oceansat-2 scatterometer L2B wind data.
In the process of wind stress computation, Large. Oct The upper ocean response to winds Wind stress and drag coefficients. Wind blowing over the sea surface exerts a stress on the ocean that imparts momentum. This drag force at the surface slows the wind speed and forms a boundary layer in the atmosphere.
The wind stress curl is Curl() = / x - / y, where the components of the wind stress vector are and ; the curl expresses the rotation a vertical column of air would experience in a wind field that varies in space. The Central American wind jets extend at least km into the Pacific and produce distinctive curl dipoles as.
2 Ocean Surface Wind and Stress where w is the relative azimuth angle between the plane of incidence of the radar beam and the stress direction, y is the incidence angle (relative to nadir), and p represents the polarization (Jones and Schroeder, ).File Size: 5MB.
April I. Hellerman COMPUTATIONS OF WIND STRESS FIELDS OVER THE ATLANTIC OCEAN S. HELLERMAN U.S. Weather Bureau, Washington, D.C. ABSTRACT A review is made of the procedures used by the Scripps Institute of Oceanography and by Hidaka in the first systematic attcmpts to compute the field of mean wind stress, 7, over the oceans by means of the resistance law.
stress and wind stress curl over the California Current." August 87 p. For sale by the Superinten dent of Documents, U.S. Government Printing Office, Washington, DC ABSTRACT Historical surface marine wind observations are summarized by I-degreesquare areas and months to describe the seasonal distribution of wind stress over the.the wind stress ﬁeld.
Thus, such measurements can be used to study the effects of wind stress curl on local upwelling if accurate estimates of the stress curl can be obtained through careful data processing.
A large volume of integrated observations were col-lected in the area of Monterey Bay, California, during."WASWind (Wave and Anemometer-based Sea Surface Wind) provides a bias-corrected marine surface wind dataset over the global oceans.
Variables include scalar, zonal and meridional winds at meter high, and zonal and meridional components of wind stress. WASWind has been constructed from wind.