A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica
ABSTRACT. The a ppeara n ce of doubl e-ridge features o n visible image ry of th e ice di vides of Antarctic ice rises has often been noted but, large ly due to a lac k of adeq ua te ground truth, th eir origins have rem a in ed en igma ti c. ' Ve present seve ra l examples of ice rises and oth...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.634.3500 2023-05-15T13:37:43+02:00 A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica A. H. Goodwin The Pennsylvania State University CiteSeerX Archives 1995 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.3500 http://www.igsoc.org/journal/41/139/igs_journal_vol41_issue139_pg483-489.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.3500 http://www.igsoc.org/journal/41/139/igs_journal_vol41_issue139_pg483-489.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.igsoc.org/journal/41/139/igs_journal_vol41_issue139_pg483-489.pdf text 1995 ftciteseerx 2016-01-08T15:37:38Z ABSTRACT. The a ppeara n ce of doubl e-ridge features o n visible image ry of th e ice di vides of Antarctic ice rises has often been noted but, large ly due to a lac k of adeq ua te ground truth, th eir origins have rem a in ed en igma ti c. ' Ve present seve ra l examples of ice rises and oth er iso lated ice-OOl'v ce lllres that a pparentl y show d o ubl e rid ges. vV e investiga te one of th ese in particul a r: Fl etcher Pro montor y, Anta rc ti ca. A di gita l-eleva tion model (DEM) of the summit regio n is der ived fro m surface pro fi les obtained using th e Global Positioning Sys tem (GPS) and thi s is correlated 'with La ndsa t MSS sa tcllite imagery. Prec ise reg istra ti o n is ac hi e\'ed by co rrela ting im age-brightness values with surface slope calcul a ted a long the d irec tion o f the Sun az im uth in th e image. Us ing a simple bi-directional re la tion, th e DEM d a ta a re used to m odel the Landsa t im age. We th erefore d emonstrate that the doub le rid ge is a produ c t o f a subtl e concavity pa ra ll el to the rid ge and is unlikel y to be d epe nd e nt on other factO rs. This concavity is not predi c ted b y stead y-sta te m od els ofi ee di vid es a nd so we sugges t th a t the ridge m ay not be in a steady-sta te but responding to changes in rh e g laciologieal boundary conditions. We spec ul a te that thi s ma v be a n indication o f Text Antarc* Antarctic Antarctica Unknown Antarctic |
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ftciteseerx |
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English |
description |
ABSTRACT. The a ppeara n ce of doubl e-ridge features o n visible image ry of th e ice di vides of Antarctic ice rises has often been noted but, large ly due to a lac k of adeq ua te ground truth, th eir origins have rem a in ed en igma ti c. ' Ve present seve ra l examples of ice rises and oth er iso lated ice-OOl'v ce lllres that a pparentl y show d o ubl e rid ges. vV e investiga te one of th ese in particul a r: Fl etcher Pro montor y, Anta rc ti ca. A di gita l-eleva tion model (DEM) of the summit regio n is der ived fro m surface pro fi les obtained using th e Global Positioning Sys tem (GPS) and thi s is correlated 'with La ndsa t MSS sa tcllite imagery. Prec ise reg istra ti o n is ac hi e\'ed by co rrela ting im age-brightness values with surface slope calcul a ted a long the d irec tion o f the Sun az im uth in th e image. Us ing a simple bi-directional re la tion, th e DEM d a ta a re used to m odel the Landsa t im age. We th erefore d emonstrate that the doub le rid ge is a produ c t o f a subtl e concavity pa ra ll el to the rid ge and is unlikel y to be d epe nd e nt on other factO rs. This concavity is not predi c ted b y stead y-sta te m od els ofi ee di vid es a nd so we sugges t th a t the ridge m ay not be in a steady-sta te but responding to changes in rh e g laciologieal boundary conditions. We spec ul a te that thi s ma v be a n indication o f |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
A. H. Goodwin |
spellingShingle |
A. H. Goodwin A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica |
author_facet |
A. H. Goodwin |
author_sort |
A. H. Goodwin |
title |
A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica |
title_short |
A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica |
title_full |
A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica |
title_fullStr |
A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica |
title_full_unstemmed |
A topographic origin for the double-ridge features in visible imagery of ice divides in Antarctica |
title_sort |
topographic origin for the double-ridge features in visible imagery of ice divides in antarctica |
publishDate |
1995 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.3500 http://www.igsoc.org/journal/41/139/igs_journal_vol41_issue139_pg483-489.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://www.igsoc.org/journal/41/139/igs_journal_vol41_issue139_pg483-489.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.634.3500 http://www.igsoc.org/journal/41/139/igs_journal_vol41_issue139_pg483-489.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766097019439415296 |