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Stability and Uncertainty of Ice-She...

Hay, Michael John.

Stability and Uncertainty of Ice-Sheet Crystal Fabrics.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Stability and Uncertainty of Ice-Sheet Crystal Fabrics./
Author:	Hay, Michael John.
Description:	1 online resource (120 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
Subject:	Geophysics. -
Online resource:	click for full text (PQDT)
ISBN:	9780355123609

Stability and Uncertainty of Ice-Sheet Crystal Fabrics.
Hay, Michael John.

Stability and Uncertainty of Ice-Sheet Crystal Fabrics. - 1 online resource (120 pages)

Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.

Thesis (Ph.D.)--University of Washington, 2017.

Includes bibliographical references

Ice crystal orientation fabric has a large effect on polycrystalline ice flow. In this thesis, I explore uncertainty of ice fabric measurements, and the related question of stability of ice crystal fabrics and anisotropic ice flow in ice sheets. I develop new estimates of uncertainty of fabric parameter estimates from thin-section data, and connect this to uncertainty in ice flow characteristics. To reduce this sampling error, I develop a new inverse method to infer fabric parameters from sonic velocity measurements and thin-section samples. I show a number of results concerning the stability of ice crystal fabrics in ice sheets. First, I show that small velocity gradient perturbations can induce large changes in ice fabric, which in turn affects anisotropic ice viscosity significantly. Next, I analyze the development of incipient fabric perturbations in coupled flow. I develop an analytical coupled model of anisotropic ice flow and fabric evolution, and show that the coupled system is unstable in many circumstances under ice-sheet flank flow and divide flow.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355123609Subjects--Topical Terms:

686174
Geophysics.
Index Terms--Genre/Form:

554714
Electronic books.

Stability and Uncertainty of Ice-Sheet Crystal Fabrics.
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020 $a 9780355123609
035 $a (MiAaPQ)AAI10289772
035 $a (MiAaPQ)washington:17421
035 $a AAI10289772
040 $a MiAaPQ $b eng $c MiAaPQ
100 1 $a Hay, Michael John. $3 1186973
245 1 0 $a Stability and Uncertainty of Ice-Sheet Crystal Fabrics.
264 0 $c 2017
300 $a 1 online resource (120 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
500 $a Adviser: Edwin D. Waddington.
502 $a Thesis (Ph.D.)--University of Washington, 2017.
504 $a Includes bibliographical references
520 $a Ice crystal orientation fabric has a large effect on polycrystalline ice flow. In this thesis, I explore uncertainty of ice fabric measurements, and the related question of stability of ice crystal fabrics and anisotropic ice flow in ice sheets. I develop new estimates of uncertainty of fabric parameter estimates from thin-section data, and connect this to uncertainty in ice flow characteristics. To reduce this sampling error, I develop a new inverse method to infer fabric parameters from sonic velocity measurements and thin-section samples. I show a number of results concerning the stability of ice crystal fabrics in ice sheets. First, I show that small velocity gradient perturbations can induce large changes in ice fabric, which in turn affects anisotropic ice viscosity significantly. Next, I analyze the development of incipient fabric perturbations in coupled flow. I develop an analytical coupled model of anisotropic ice flow and fabric evolution, and show that the coupled system is unstable in many circumstances under ice-sheet flank flow and divide flow.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Geophysics. $3 686174
655 7 $a Electronic books. $2 local $3 554714
690 $a 0373
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Washington. $b Earth and Space Sciences. $3 1186974
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10289772 $z click for full text (PQDT)

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