Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12)
Much recent research points to the shrinkage of the Earth's small glaciers, however, few studies have been performed to quantify the amount of change over time. We measured glacier-extent changes in two national parks in southeastern Alaska. There are hundreds of glaciers in Kenai Fjords Nation...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20080039170 2023-05-15T16:20:26+02:00 Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12) Giffen, Bruce A. Hall, Dorothy K. Chien, Janet Y.L. Unclassified, Unlimited, Publicly available [2007] application/pdf http://hdl.handle.net/2060/20080039170 unknown Document ID: 20080039170 http://hdl.handle.net/2060/20080039170 Copyright, Distribution as joint owner in the copyright CASI Geophysics 64th Annual Meeting of the Eastern Snow Conference (ESC); 29 May - 1 Jun. 2007; St. John''s, Newfoundland; Canada 2007 ftnasantrs 2019-07-21T01:28:07Z Much recent research points to the shrinkage of the Earth's small glaciers, however, few studies have been performed to quantify the amount of change over time. We measured glacier-extent changes in two national parks in southeastern Alaska. There are hundreds of glaciers in Kenai Fjords National Park (KEFJ) and Katmai National Park and Preserve (KATM) covering over 2373 sq km of parkland. There are two primary areas of glaciation in KEFJ - the Harding Icefield and the Grewingk-Yalik Glacier Complex, and three primary areas of glaciation in KATM - the Mt. Douglas area, the Kukak Volcano to Mt. Katmai area and the Mt. Martin area. We performed glacier mapping using satellite imagery, from the 1970s, 1980s, and from 2000. Results of the analysis show that there has been a reduction in the amount of glacier ice cover in the two parks over the study period, of approximately 22 sq km of ice, approximately - 1.6% from 1986 to 2000 (for KEFJ), and of approximately 76 sq km of glacier ice, or about -7.7% from 1986187 to 2000 (for KATM). In the future, measurements of surface elevation changes of these ice masses should be acquired; together with our extent-change measurements, the volume change of the ice masses can then be determined to estimate their contribution to sea-level rise. The work is a continuation of work done in KEFJ, but in KATM, our measurements represent the first comprehensive study of the glaciers in this remote, little-studied area. Other/Unknown Material glacier glaciers Alaska NASA Technical Reports Server (NTRS) Harding ENVELOPE(75.033,75.033,-72.900,-72.900) Parkland ENVELOPE(-120.570,-120.570,55.917,55.917) |
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NASA Technical Reports Server (NTRS) |
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Geophysics |
spellingShingle |
Geophysics Giffen, Bruce A. Hall, Dorothy K. Chien, Janet Y.L. Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12) |
topic_facet |
Geophysics |
description |
Much recent research points to the shrinkage of the Earth's small glaciers, however, few studies have been performed to quantify the amount of change over time. We measured glacier-extent changes in two national parks in southeastern Alaska. There are hundreds of glaciers in Kenai Fjords National Park (KEFJ) and Katmai National Park and Preserve (KATM) covering over 2373 sq km of parkland. There are two primary areas of glaciation in KEFJ - the Harding Icefield and the Grewingk-Yalik Glacier Complex, and three primary areas of glaciation in KATM - the Mt. Douglas area, the Kukak Volcano to Mt. Katmai area and the Mt. Martin area. We performed glacier mapping using satellite imagery, from the 1970s, 1980s, and from 2000. Results of the analysis show that there has been a reduction in the amount of glacier ice cover in the two parks over the study period, of approximately 22 sq km of ice, approximately - 1.6% from 1986 to 2000 (for KEFJ), and of approximately 76 sq km of glacier ice, or about -7.7% from 1986187 to 2000 (for KATM). In the future, measurements of surface elevation changes of these ice masses should be acquired; together with our extent-change measurements, the volume change of the ice masses can then be determined to estimate their contribution to sea-level rise. The work is a continuation of work done in KEFJ, but in KATM, our measurements represent the first comprehensive study of the glaciers in this remote, little-studied area. |
format |
Other/Unknown Material |
author |
Giffen, Bruce A. Hall, Dorothy K. Chien, Janet Y.L. |
author_facet |
Giffen, Bruce A. Hall, Dorothy K. Chien, Janet Y.L. |
author_sort |
Giffen, Bruce A. |
title |
Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12) |
title_short |
Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12) |
title_full |
Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12) |
title_fullStr |
Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12) |
title_full_unstemmed |
Alaska: Glaciers of Kenai Fjords National Park and Katmai National Park and Preserve (Chapter 12) |
title_sort |
alaska: glaciers of kenai fjords national park and katmai national park and preserve (chapter 12) |
publishDate |
2007 |
url |
http://hdl.handle.net/2060/20080039170 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(75.033,75.033,-72.900,-72.900) ENVELOPE(-120.570,-120.570,55.917,55.917) |
geographic |
Harding Parkland |
geographic_facet |
Harding Parkland |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_source |
CASI |
op_relation |
Document ID: 20080039170 http://hdl.handle.net/2060/20080039170 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766008356917477376 |