ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska

Spatial and temporal backscatter intensity (sigma(sup o)) variations from ice growing on shallow lakes during winter 1991-92 near Barrow, NW Alaska, have been quantified for the first time using ERS-I C-band SAR data acquired at the Alaska SAR Facility. A field and laboratory validation program, inc...

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Bibliographic Details
Main Authors: Jeffries, M. O., Weeks, W. F., Wakabayashi, H.
Format: Other/Unknown Material
Language:unknown
Published: 1993
Subjects:
ENVIRONMENT POLLUTION
Arctic
Barrow
Alaska
Online Access:http://hdl.handle.net/2060/19960003126
id ftnasantrs:oai:casi.ntrs.nasa.gov:19960003126
record_format openpolar
spelling ftnasantrs:oai:casi.ntrs.nasa.gov:19960003126 2023-05-15T15:03:29+02:00 ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska Jeffries, M. O. Weeks, W. F. Wakabayashi, H. Unclassified, Unlimited, Publicly available Aug 21, 1993 application/pdf http://hdl.handle.net/2060/19960003126 unknown Document ID: 19960003126 Accession ID: 96N13135 http://hdl.handle.net/2060/19960003126 No Copyright CASI ENVIRONMENT POLLUTION NASA-CR-199629 NIPS-95-05488 NAS 1.26:199629 IEEE-93CH3294-6 1993 International Geoscience and Remote Sensing Symposium (IGARSS 1993). Better Understanding of Earth Environment, Volume 4; 18-21 Aug. 1993; Tokyo; Japan 1993 ftnasantrs 2019-07-21T03:20:31Z Spatial and temporal backscatter intensity (sigma(sup o)) variations from ice growing on shallow lakes during winter 1991-92 near Barrow, NW Alaska, have been quantified for the first time using ERS-I C-band SAR data acquired at the Alaska SAR Facility. A field and laboratory validation program, including measurements of the thickness and structure-stratigraphy of the ice, indicates that sigma(sup o) values are strongly dependent on whether the ice freezes to the lake bottom, or remains afloat. Backscatter intensity decreases significantly when the ice grounds on the bottom. Strong backscatter from floating ice is attributed to a specular ice-water interface and vertically oriented tubular bubbles. During the spring thaw, backscatter undergoes a reversal; sigma(sup o) values from ice that was grounded increase, while sigma(sup o) values from ice that was afloat decrease. This phenomenon has not previously been reported. Other/Unknown Material Arctic Barrow Alaska NASA Technical Reports Server (NTRS) Arctic
institution Open Polar
collection NASA Technical Reports Server (NTRS)
op_collection_id ftnasantrs
language unknown
topic ENVIRONMENT POLLUTION
spellingShingle ENVIRONMENT POLLUTION
Jeffries, M. O.
Weeks, W. F.
Wakabayashi, H.
ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska
topic_facet ENVIRONMENT POLLUTION
description Spatial and temporal backscatter intensity (sigma(sup o)) variations from ice growing on shallow lakes during winter 1991-92 near Barrow, NW Alaska, have been quantified for the first time using ERS-I C-band SAR data acquired at the Alaska SAR Facility. A field and laboratory validation program, including measurements of the thickness and structure-stratigraphy of the ice, indicates that sigma(sup o) values are strongly dependent on whether the ice freezes to the lake bottom, or remains afloat. Backscatter intensity decreases significantly when the ice grounds on the bottom. Strong backscatter from floating ice is attributed to a specular ice-water interface and vertically oriented tubular bubbles. During the spring thaw, backscatter undergoes a reversal; sigma(sup o) values from ice that was grounded increase, while sigma(sup o) values from ice that was afloat decrease. This phenomenon has not previously been reported.
format Other/Unknown Material
author Jeffries, M. O.
Weeks, W. F.
Wakabayashi, H.
author_facet Jeffries, M. O.
Weeks, W. F.
Wakabayashi, H.
author_sort Jeffries, M. O.
title ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska
title_short ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska
title_full ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska
title_fullStr ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska
title_full_unstemmed ERS-1 SAR backscatter changes associated with ice growing on shallow lakes in Arctic Alaska
title_sort ers-1 sar backscatter changes associated with ice growing on shallow lakes in arctic alaska
publishDate 1993
url http://hdl.handle.net/2060/19960003126
op_coverage Unclassified, Unlimited, Publicly available
geographic Arctic
geographic_facet Arctic
genre Arctic
Barrow
Alaska
genre_facet Arctic
Barrow
Alaska
op_source CASI
op_relation Document ID: 19960003126
Accession ID: 96N13135
http://hdl.handle.net/2060/19960003126
op_rights No Copyright
_version_ 1766335335976927232

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