1 edition of A study of the velocity structure near a cold filament from ADCP and CTD measurements found in the catalog.
A study of the velocity structure near a cold filament from ADCP and CTD measurements
Francis L. Daggett
by Naval Postgraduate School, Available from the National Technical Information Service in Monterey, Calif, Springfield, Va
Written in English
|Contributions||Ramp, Steven R.|
|The Physical Object|
|Pagination||1 v. (various paginations).|
This work focuses on the study of thermal dispersion of plumes emitted by power plants into the sea. Wastewater discharge from power stations causes impacts that require investigation or monitoring. A study to characterize the physical effects of thermal plumes into the sea is carried out here by numerical modeling and field measurements. The case study is the thermal discharges of the Cited by: 4. RESEARCH ARTICLE /JC Scales and properties of cold filaments in the Benguela upwelling system off L€uderitz Elisabeth H€osen 1, Judith M€oller 1, Kerstin Jochumsen1, and Detlef Quadfasel 1Institut f€ur Meereskunde, Universit €at Hamburg, Hamburg, Germany Abstract The Benguela upwelling system is one of the four strongest upwelling systems in the by: 4.
During September and February , the NR/V Alliance extensively sampled the waters of the Sea of Marmara within the framework of the Turkish Straits System (TSS) experiment coordinated by the NATO Undersea Research Centre. The observational effort provided an opportunity to set up realistic numerical experiments for modeling the observed variability of the Marmara Sea upper Cited by: STUDY. Flashcards. Learn. Write. Spell. Test. PLAY. Match. Gravity. Created by. a_melvs. Terms in this set (66) proteins that interact with actin monomers or filaments to control the assembly, structure and behavior of actin filaments and networks. actin-binding protein. specialized layer of cytoplasm on the inner face of the plasma membrane.
The study is based on recent observations, analysis of historical data, and literature review. A strong flow of Antarctic Bottom Water from the Argentine Basin to the Brazil Basin through the Vema Channel (32 S) is studied on the basis of CTD sections combined with LADCP profiling carried out annually and long-term moored measurements. Kosro et al. [ ] and Huyer et al. [ ] showed that acoustic Doppler current profiler (ADCP) maps of the velocity field reproduced the patterns in the circulation observations derived from conductivity-temperature-depth (CTD) measurements. In the drifter tended to be inshore of the high-velocity portion of the meander.
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Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection A study of the velocity structure near a cold filament. i I Title (include security clayslficator) A STUDY OF THE VELOCITY STRUCTURE NEAR A COLD FILAMENT FROM ADCP AND CTD MEASUREMENTS 12 Personal Author~s) Francis L.
Daggett 13a Type of Report ]3t Time Covered 14 Date of Report (year, month, day) 15 Page Count Master's Thesis From To September [1 Sections of geostrophic and ADCP velocity indicated that the flow in the region was highly geostrophic, but ageostrophic flow components were also present, particularly in the high velocity regions.
Volume transport was computed for a portion of the survey area using the two velocity data sets and the Ekman transport, computed from the observed wind : Francis L. Daggett. CTD and ADCP data from the Coastal Transition Zone (CTZ) pilot cruise off Point Arena, California, during Junewere combined to make optimal estimates of the current velocity field.
A transect of CTD profiles crossing the North Atlantic Current (NAC) along WOCE line ACM6 near °N during August 1–7,provides geostrophic shear velocity profiles, which were. The structure of the filament observed here is qualitatively different from a dense filament (e.g., McWilliams et al., ) in that the dense isopycnals of the filament do not outcrop near the center of the filament.
In contrast, the halocline above is a low salinity/low density layer on top that actually gets accumulated near the center of Cited by: 6.
The flow patterns of the Gulf Stream warm core rings and surrounding shelf break and slope water are constructed from shipboard acoustic Doppler current profiler (ADCP) transects of the Oleander Pr Cited by: The M/V North Star covered a smaller nearshore area with CTD casts and towed ADCP.
Wind measurements were obtained from the National Data Buoy Center (NDBC) buoy located off of Delaware Bay at °N, °W, which is approximately km south-southwest from the site of Cited by: Sections of geostrophic and ADCP velocity indicated that the flow in the region was highly geostrophic, but ageostrophic flow components were also present, particularly in the high velocity regions.
They suggested that the salinity minimum layer water could flow out as the KSBCW. We still do not have a satisfactory explanation, however, on how this cold water reaches the near-bottom layer in the western channel of Korea Strait. A few ADCP measurements have been made to find the non-tidal component of the current in Korea by: The presence of lee waves in these regions is usually inferred from finescale (order m) measurements of variance in velocity shear and isopycnal strain, which show a predominance of upward.
But this value is much higher than the 20 cm s − 1 seen in the surface waters (Fig. 7d) and in general lies at the highest level of the filament velocity range cited in the literature. Verification of this issue and a systematic study of filament exchange are planned, by means of the combination of hydrologic measurements and ADCP data by: The CTD and ADCP data were used to create velocity maps on isopycnals and trajectories of the isopycnal parcels were determined by integrating these velocities with respect to time.
During the second cruise (in early fall ) PV fields around two parcels were studied—both upstream of a meander by: 9. Near-surface drifters were deployed in the California Current System during the period in order to study mean and eddy currents.
The distribution of relative vorticity and vertical velocity within the filament structure are similar between the modeling study and the observations in SS1. The reported length scales of baroclinic instabilities in the model are on the order of 60– km (this represents a half-wavelength).Cited by: Two different sampling strategies were employed throughout the cruise and are illustrated in Fig.
map the three-dimensional structure and physical properties of the filaments, ship-based towed conductivity-temperature-depth (CTD) and vessel-mounted acoustic Doppler current profiler (ADCP) surveys were by: 3.
Abstract The Benguela upwelling system is one of the four strongest upwelling systems in the world. Meso‐scale and submeso‐scale structures like eddies and filaments build up at the front between t Cited by: 4.
In August a cruise took place to study a recurrent upwelling filament located near 42°N. In situ measurements of the hydrographic, velocity and turbulent dissipation structure were obtained together with Lagrangian observations, both on the continental shelf near the filament origin and in the filament Cited by: Two quasi‐synoptic mesoscale surveys were performed with Moving Vessel Profiler, CTD, ADCP and drifters to sample the structure of the upwelling filaments and surroundings, in support of several Lagrangian, tracer and gas exchange experiments.
The present aim is to establish an Eulerian view of their temperature, salinity, density and Cited by: A planar view of the temporal average of all available current velocity data near the m depth level at each mooring is shown in Fig.
main body of the Kuroshio is located in the southern portion of the strait centered at station 6 on top of the canyon, with a current velocity of 45 cm s −1 pointing toward °. A second core of the current is found at station 2, with a velocity of Cited by:.
An acoustic Doppler current profiler (ADCP) moored a few meters above the bottom at the m isobath out from Perth gave hourly data at 4-m depth intervals for little over an year (Figure 11).In December, there was strong northward alongshore flow due to the wind-driven Capes Current that lowered the temperature at the instrument by 2°C.determined from acoustic Doppler current profiler (ADCP) measurements.
Detided model currents showed good agreement with ADCP currents with rms errors along the principal variance axes ranging from 6 to cm/s and correlations ranging from to Correlations between model and ADCP currents along the minor variance axes were generally.been ﬁltered out of both the density and velocity datasets.
b. Experimental description and observed frontal structure Measurements focused on the North Wall of the Gulf Stream, past the point where it separates from Cape Hatteras, North Carolina, between and N and and W.
Here, cold subpolar water and warm sub.