東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

The Plasma Physics Processes that Dr...

Cash, Michele Diane.

Linked to FindBook

Google Book

Amazon

博客來

The Plasma Physics Processes that Drive Ring Current Enhancements during Geomagnetic Storms and Substorms.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The Plasma Physics Processes that Drive Ring Current Enhancements during Geomagnetic Storms and Substorms./
Author:	Cash, Michele Diane.
Description:	173 p.
Notes:	Source: Dissertation Abstracts International, Volume: 74-01(E), Section: B.
Contained By:	Dissertation Abstracts International74-01B(E).
Subject:	Physics, Fluid and Plasma. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3521640
ISBN:	9781267529534

The Plasma Physics Processes that Drive Ring Current Enhancements during Geomagnetic Storms and Substorms.
Cash, Michele Diane.

The Plasma Physics Processes that Drive Ring Current Enhancements during Geomagnetic Storms and Substorms. - 173 p.

Source: Dissertation Abstracts International, Volume: 74-01(E), Section: B.

Thesis (Ph.D.)--University of Washington, 2012.

Geomagnetic storms result when energetic particles of solar and ionospheric origin fill Earth's inner magnetosphere and create a strong westward current, known as the ring current. This dissertation presents results from investigating the plasma dynamics that contribute to the development of Earth's ring current from ionospheric outflow of H+ and O+ ions, and the role of ring current enhancements in the generation of geomagnetic storms and substorms. Modeling was carried via a combined multifluid and particle approach, which enables us to resolve the small-scale dynamics that are key to particle energization within the context of the global magnetosphere. The results presented in this dissertation substantially contribute to our understanding of the development and composition of the ring current during geomagnetic storms and substorms, and offer insight into the ionospheric sources regions for ring current ions, as well as the processes through which these particles are energized, injected, and trapped within the inner magnetosphere.

ISBN: 9781267529534Subjects--Topical Terms:

1018402
Physics, Fluid and Plasma.

The Plasma Physics Processes that Drive Ring Current Enhancements during Geomagnetic Storms and Substorms.
LDR:02983nam a2200289 4500 001 1961789
005 20140722092941.5
008 150210s2012 ||||||||||||||||| ||eng d
020 $a 9781267529534
035 $a (MiAaPQ)AAI3521640
035 $a AAI3521640
040 $a MiAaPQ $c MiAaPQ
100 1 $a Cash, Michele Diane. $3 2097739
245 1 4 $a The Plasma Physics Processes that Drive Ring Current Enhancements during Geomagnetic Storms and Substorms.
300 $a 173 p.
500 $a Source: Dissertation Abstracts International, Volume: 74-01(E), Section: B.
500 $a Advisers: Robert M. Winglee; Erika M. Harnett.
502 $a Thesis (Ph.D.)--University of Washington, 2012.
520 $a Geomagnetic storms result when energetic particles of solar and ionospheric origin fill Earth's inner magnetosphere and create a strong westward current, known as the ring current. This dissertation presents results from investigating the plasma dynamics that contribute to the development of Earth's ring current from ionospheric outflow of H+ and O+ ions, and the role of ring current enhancements in the generation of geomagnetic storms and substorms. Modeling was carried via a combined multifluid and particle approach, which enables us to resolve the small-scale dynamics that are key to particle energization within the context of the global magnetosphere. The results presented in this dissertation substantially contribute to our understanding of the development and composition of the ring current during geomagnetic storms and substorms, and offer insight into the ionospheric sources regions for ring current ions, as well as the processes through which these particles are energized, injected, and trapped within the inner magnetosphere.
520 $a This thesis presents results that show how small-scale particle dynamics within the current sheet, boundary layers, and reconnection regions drive the acceleration of ring current particles within the larger global context of the magnetosphere. Small-scale structures within the magnetotail are shown to be more important in determining when particles are accelerated than the time after particles are initialized in the ionosphere. It is also found that after a period of southward IMF, in which particle energization is observed, a northerly turning of the IMF is necessary in order to trap energetic particles in orbit around the Earth and form a symmetric ring current. Asymmetries in the acceleration mechanisms between ionospheric H+ and O + ions were observed with oxygen ions convecting duskward according to the cross-tail current and gaining more energy than protons, which moved earthward on reconnecting field lines and were accelerated closer to the plasma sheet inner boundary.
590 $a School code: 0250.
650 4 $a Physics, Fluid and Plasma. $3 1018402
650 4 $a Atmospheric Sciences. $3 1019179
690 $a 0759
690 $a 0725
710 2 $a University of Washington. $b Earth and Space Sciences. $3 2097740
773 0 $t Dissertation Abstracts International $g 74-01B(E).
790 $a 0250
791 $a Ph.D.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3521640