Flow over surface discontinuities in a marine environment Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nv935606g

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • This study concentrates on analysis of LongEZ aircraft data taken offshore of the Atlantic Coast of the United States. Due to the land structure of the region, it was possible to isolate the effect of narrow land on air as it flows offshore. The narrow land (Outer Banks) separates inland water from the sea. With greater land fetch, the internal boundary layer (IBL) over land grows deeper and the eddies presumably grow larger. Larger eddies typically decay more slowly than smaller eddies, and so the turbulence advected from land with a larger land fetch should survive longer over the sea and be greater in magnitude than that with smaller land fetch. The turbulence is studied using aircraft eddy correlation data as the flow is advected over the water. As expected, greater and longer-lasting turbulence is present downstream from greater land widths. Aircraft data taken over the Gulf Stream (GS) boundary are analyzed to study the effects of the sea surface temperature (SST) front on downstream boundary layer structure. Unstable and stable flows are studied in this region. The stable flow case is found to have an upside-down structure, with greater turbulence aloft causing stress convergence at the surface, which acts to accelerate the flow. The local thermally generated pressure gradient is important in the momentum budget across the GS front in both flow cases. A synthetic aperture radar (SAR) image is analyzed qualitatively in the region between the Atlantic Coast and the Gulf Stream front for intercomparison of data and to examine the influences of varying static stabilities and surface conditions upon the backscatter shown in satellite images. The growth rates of the internal boundary layer due to flow over a heterogeneous surface including flow from land over the water and flow between cooler water and warmer water are calculated. These results are compared to similar calculations of growth rates from previous experiments. It is found that the growth rate of an internal boundary layer is dependent on surface roughness, despite the inclusion of σ[subscript w] in the normalization of the growth rate.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 24-bit Color) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2012-04-13T17:33:07Z (GMT). No. of bitstreams: 1 MooreErinM2003.pdf: 2016308 bytes, checksum: 28ff218950ee75035db02ac23cce2e19 (MD5) Previous issue date: 2002-07-25
  • description.provenance : Submitted by Kirsten Clark (clarkkir@onid.orst.edu) on 2012-04-11T19:07:32Z No. of bitstreams: 1 MooreErinM2003.pdf: 2016308 bytes, checksum: 28ff218950ee75035db02ac23cce2e19 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-04-13T17:33:07Z (GMT) No. of bitstreams: 1 MooreErinM2003.pdf: 2016308 bytes, checksum: 28ff218950ee75035db02ac23cce2e19 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-04-13T17:29:00Z (GMT) No. of bitstreams: 1 MooreErinM2003.pdf: 2016308 bytes, checksum: 28ff218950ee75035db02ac23cce2e19 (MD5)

Relationships

In Administrative Set:
Last modified: 08/15/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items