東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

An Observation-based Study of Gulf S...

Muglia, Michael.

FindBook

Google Book

Amazon

博客來

An Observation-based Study of Gulf Stream Position, Width, Orientation, Marine Hydrokinetic Energy, and Meander Kinematics Off Cape Hatteras, NC.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	An Observation-based Study of Gulf Stream Position, Width, Orientation, Marine Hydrokinetic Energy, and Meander Kinematics Off Cape Hatteras, NC./
作者:	Muglia, Michael.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	230 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
Contained By:	Dissertations Abstracts International81-03B.
標題:	Physical oceanography. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22585289
ISBN:	9781085756952

An Observation-based Study of Gulf Stream Position, Width, Orientation, Marine Hydrokinetic Energy, and Meander Kinematics Off Cape Hatteras, NC.
Muglia, Michael.

An Observation-based Study of Gulf Stream Position, Width, Orientation, Marine Hydrokinetic Energy, and Meander Kinematics Off Cape Hatteras, NC. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 230 p.

Source: Dissertations Abstracts International, Volume: 81-03, Section: B.

Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2019.

This item must not be sold to any third party vendors.

Gulf Stream (GS) observations off Cape Hatteras, NC are used to: develop a method to determine the variability in the landward GS edge, orientation, and width of the Cyclonic Shear Zone (CSZ); determine spatial and temporal Marine Hydrokinetic Energy (MHK) variability, shearing, and susceptibility to turbulent mixing in the water column to inform MHK development; and investigate meander kinematics.The method uses radial velocity measurements from surface current-mapping High Frequency Radars (HFRs) during November 2014 to provide estimates of GS properties with daily temporal resolution. Estimated quality decreases with range from the radars. Cross-correlations between radar estimates in the same region range from 0.61-0.82 for the GS edge and 0.65-0.77 for the jet. GS CSZ width metrics range from mean values of 29 to 32 km. Daily GS orientation estimates are affected by the crossing angle of the radial bearing relative to the GS. Meander propagation speed estimates double from 2.88 km/hr south of the cape, to 5.69 km/hr just east of it.Multi-year measurements of current, salinity, and temperature from fixed and vessel mounted sensors quantify MHK resource variability and inform development. Currents from a fixed Acoustic Doppler Current Profiler (ADCP) exceed 1 m/s 64% of the time 40 meters below the surface. Current reversals from the mean GS direction occur several times a month. Shear maxima approach 0.06 s-1. Near-inertial internal waves contribute to turbulent mixing. Vessel transects across the GS demonstrate velocity structure depends upon whether the GS is against the shelf slope or offshore.Meander kinematics are investigated by comparing current measurements and Sea Surface Temperatures (SSTs) during November 2014. Increase and deepening times for the downstream current with approaching crests is often longer than that for the decrease and shoaling, resulting in prominent skewed crests near the surface. Downstream and cross-stream shear profiles are indicative of a turbulent thermal wind balance. Local maxima in current and temperature at the mooring occur simultaneously, and are led by offshore currents in the upper water column. Mean meander phase speed estimated with HFRs is 48 km/day.

ISBN: 9781085756952Subjects--Topical Terms:

3168433
Physical oceanography.
Subjects--Index Terms:

Gulf stream

An Observation-based Study of Gulf Stream Position, Width, Orientation, Marine Hydrokinetic Energy, and Meander Kinematics Off Cape Hatteras, NC.
LDR:03534nmm a2200385 4500 001 2280182
005 20210830065506.5
008 220723s2019 ||||||||||||||||| ||eng d
020 $a 9781085756952
035 $a (MiAaPQ)AAI22585289
035 $a AAI22585289
040 $a MiAaPQ $c MiAaPQ
100 1 $a Muglia, Michael. $3 3558687
245 1 3 $a An Observation-based Study of Gulf Stream Position, Width, Orientation, Marine Hydrokinetic Energy, and Meander Kinematics Off Cape Hatteras, NC.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 230 p.
500 $a Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
500 $a Advisor: Seim, Harvey.
502 $a Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2019.
506 $a This item must not be sold to any third party vendors.
520 $a Gulf Stream (GS) observations off Cape Hatteras, NC are used to: develop a method to determine the variability in the landward GS edge, orientation, and width of the Cyclonic Shear Zone (CSZ); determine spatial and temporal Marine Hydrokinetic Energy (MHK) variability, shearing, and susceptibility to turbulent mixing in the water column to inform MHK development; and investigate meander kinematics.The method uses radial velocity measurements from surface current-mapping High Frequency Radars (HFRs) during November 2014 to provide estimates of GS properties with daily temporal resolution. Estimated quality decreases with range from the radars. Cross-correlations between radar estimates in the same region range from 0.61-0.82 for the GS edge and 0.65-0.77 for the jet. GS CSZ width metrics range from mean values of 29 to 32 km. Daily GS orientation estimates are affected by the crossing angle of the radial bearing relative to the GS. Meander propagation speed estimates double from 2.88 km/hr south of the cape, to 5.69 km/hr just east of it.Multi-year measurements of current, salinity, and temperature from fixed and vessel mounted sensors quantify MHK resource variability and inform development. Currents from a fixed Acoustic Doppler Current Profiler (ADCP) exceed 1 m/s 64% of the time 40 meters below the surface. Current reversals from the mean GS direction occur several times a month. Shear maxima approach 0.06 s-1. Near-inertial internal waves contribute to turbulent mixing. Vessel transects across the GS demonstrate velocity structure depends upon whether the GS is against the shelf slope or offshore.Meander kinematics are investigated by comparing current measurements and Sea Surface Temperatures (SSTs) during November 2014. Increase and deepening times for the downstream current with approaching crests is often longer than that for the decrease and shoaling, resulting in prominent skewed crests near the surface. Downstream and cross-stream shear profiles are indicative of a turbulent thermal wind balance. Local maxima in current and temperature at the mooring occur simultaneously, and are led by offshore currents in the upper water column. Mean meander phase speed estimated with HFRs is 48 km/day.
590 $a School code: 0153.
650 4 $a Physical oceanography. $3 3168433
650 4 $a Energy. $3 876794
650 4 $a Engineering. $3 586835
653 $a Gulf stream
653 $a Gulf stream meander
653 $a High frequency radar
653 $a Marine hydrokinetic energy
653 $a MHK
653 $a Western boundary current
690 $a 0415
690 $a 0791
690 $a 0537
710 2 $a The University of North Carolina at Chapel Hill. $b Marine Sciences. $3 1670010
773 0 $t Dissertations Abstracts International $g 81-03B.
790 $a 0153
791 $a Ph.D.
792 $a 2019
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=22585289