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The role of the pressure field in wi...

English, Chad A.

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The role of the pressure field in wind driven coastal circulation (California).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The role of the pressure field in wind driven coastal circulation (California)./
作者:	English, Chad A.
面頁冊數:	120 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1360.
Contained By:	Dissertation Abstracts International66-03B.
標題:	Physical Oceanography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3167853
ISBN:	9780542041730

The role of the pressure field in wind driven coastal circulation (California).
English, Chad A.

The role of the pressure field in wind driven coastal circulation (California). - 120 p.

Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1360.

Thesis (Ph.D.)--University of California, San Diego, 2005.

Moored bottom pressure and temperature data are used to examine the relationship between the three-dimensional, subtidal pressure field and the local wind forcing in the Santa Barbara Channel (SBC) and Santa Maria Basin (SMB) region of the central California coast. Two distinct frequency bands of variability are identified, seasonal (f < 1/180 cpd) and synoptic (1/45 cpd < f < 1/2 cpd). These bands characterize the wind field and its relationship to the pressure field. In the seasonal band, no dynamic link is identified between the local wind stress and the pressure field. Within the synoptic band, the response of the pressure field to local winds extends to approximately 300 m depth in the SMB and along the mainland coast of the SBC. This response accounts for a significant fraction of the synoptic variability, generally greater than 50%. This response of the pressure field is seen across the entire pressure gauge array and modeling results suggest that this response spans the entire shelf width. Empirical orthogonal function analysis is used to estimate horizontal pressure gradients, including an along-shelf gradient that dynamically opposes the local wind stress. The magnitude of this along-shelf gradient supports the finding of a pressure-field response extending to approximately 300 m depth over the shelf.

ISBN: 9780542041730Subjects--Topical Terms:

1019163
Physical Oceanography.

The role of the pressure field in wind driven coastal circulation (California).
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245 1 4 $a The role of the pressure field in wind driven coastal circulation (California).
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500 $a Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1360.
500 $a Chair: Clinton D. Winant.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2005.
520 $a Moored bottom pressure and temperature data are used to examine the relationship between the three-dimensional, subtidal pressure field and the local wind forcing in the Santa Barbara Channel (SBC) and Santa Maria Basin (SMB) region of the central California coast. Two distinct frequency bands of variability are identified, seasonal (f < 1/180 cpd) and synoptic (1/45 cpd < f < 1/2 cpd). These bands characterize the wind field and its relationship to the pressure field. In the seasonal band, no dynamic link is identified between the local wind stress and the pressure field. Within the synoptic band, the response of the pressure field to local winds extends to approximately 300 m depth in the SMB and along the mainland coast of the SBC. This response accounts for a significant fraction of the synoptic variability, generally greater than 50%. This response of the pressure field is seen across the entire pressure gauge array and modeling results suggest that this response spans the entire shelf width. Empirical orthogonal function analysis is used to estimate horizontal pressure gradients, including an along-shelf gradient that dynamically opposes the local wind stress. The magnitude of this along-shelf gradient supports the finding of a pressure-field response extending to approximately 300 m depth over the shelf.
520 $a The observed pressure data are compared to output from numerical modeling studies of the same region using the Princeton Ocean Model with data assimilation. The model results support the above findings and demonstrate that the model is effective at qualitatively reproducing the behavior of the pressure field, but is not as effective at reproducing details of its relationship to the wind forcing.
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