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Analogue, numerical and field site s...

Meng, Zhiwei.

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Analogue, numerical and field site studies of EM induction in the China-Korea-Japan region.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Analogue, numerical and field site studies of EM induction in the China-Korea-Japan region./
Author:	Meng, Zhiwei.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 1991,
Description:	280 p.
Notes:	Source: Dissertation Abstracts International, Volume: 53-10, Section: B, page: 5126.
Contained By:	Dissertation Abstracts International53-10B.
Subject:	Geophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NN71029
ISBN:	9780315710290

Analogue, numerical and field site studies of EM induction in the China-Korea-Japan region.
Meng, Zhiwei.

Analogue, numerical and field site studies of EM induction in the China-Korea-Japan region. - Ann Arbor : ProQuest Dissertations & Theses, 1991 - 280 p.

Source: Dissertation Abstracts International, Volume: 53-10, Section: B, page: 5126.

Thesis (Ph.D.)--University of Victoria (Canada), 1991.

Electromagnetic induction in the continental Bohai Bay coastal region of China and the island region of Japan is studied with the aid of laboratory analogue models. Detailed model measurements of the electric (E$\sb{\rm x}$, E$\sb{\rm y}$) and magnetic (B$\sb{\rm x}$, B$\sb{\rm y}$, B$\sb{\rm z}$) field components are presented for an approximately uniform overhead horizontal source field for E- and B-polarizations. With the aid of 2D numerical models, criteria are developed for permitting approximate removal of the coast effect responses in field site measurements in coastal regions.

ISBN: 9780315710290Subjects--Topical Terms:

535228
Geophysics.

Analogue, numerical and field site studies of EM induction in the China-Korea-Japan region.
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020 $a 9780315710290
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100 1 $a Meng, Zhiwei. $3 3285373
245 1 0 $a Analogue, numerical and field site studies of EM induction in the China-Korea-Japan region.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 1991
300 $a 280 p.
500 $a Source: Dissertation Abstracts International, Volume: 53-10, Section: B, page: 5126.
500 $a Supervisor: H. W. Dosso.
502 $a Thesis (Ph.D.)--University of Victoria (Canada), 1991.
520 $a Electromagnetic induction in the continental Bohai Bay coastal region of China and the island region of Japan is studied with the aid of laboratory analogue models. Detailed model measurements of the electric (E$\sb{\rm x}$, E$\sb{\rm y}$) and magnetic (B$\sb{\rm x}$, B$\sb{\rm y}$, B$\sb{\rm z}$) field components are presented for an approximately uniform overhead horizontal source field for E- and B-polarizations. With the aid of 2D numerical models, criteria are developed for permitting approximate removal of the coast effect responses in field site measurements in coastal regions.
520 $a The analogue model results indicate that the effects of peninsulas, straits, bays and the irregularities in the coastlines play an important role in determining the electric and magnetic field responses both on-shore and off-shore for this complex coastal Bohai Bay region.
520 $a Large gradients in the in-phase B$\sb{\rm z}$ are observed over all regions of Japan for E-polarization for both short and long periods due to the effects of induced currents in the surrounding oceans. Thus, induction arrow responses over all regions of Japan shows the dominant effects of the ocean.
520 $a Coast effect response values for 3D laboratory analogue models are employed to approximately remove the geomagnetic coast effects in field measurements for some coastal sites. The resulting difference arrows indicate a N-S striking conductor to the west of Bohai Bay in the form of an upweeling in the conductive substratum (with conductivity 0.5 Sm$\sp{-1}$ at 80 km depth).
520 $a Difference arrows for complex island regions of Japan support the premise of two conductive anomalies (with conductivity 0.5Sm$\sp{-1}$) beneath the Pacific Ocean and Japan Sea. Difference arrows over the entire Japan region suggest that the two conductors roughly follow the general trend of the island arc, and eventually may be connected by an E-W striking conductor beneath Tsugaru strait to the north. (Abstract shortened by UMI.).
590 $a School code: 0244.
650 4 $a Geophysics. $3 535228
690 $a 0373
710 2 $a University of Victoria (Canada). $3 1019404
773 0 $t Dissertation Abstracts International $g 53-10B.
790 $a 0244
791 $a Ph.D.
792 $a 1991
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NN71029