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Assessing supraglacial water volume ...

Adler, John J.

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Assessing supraglacial water volume and the changing dynamics of the surface topography near the Jakobshavn Glacier, Greenland.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Assessing supraglacial water volume and the changing dynamics of the surface topography near the Jakobshavn Glacier, Greenland./
Author:	Adler, John J.
Description:	159 p.
Notes:	Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 0756.
Contained By:	Dissertation Abstracts International72-02B.
Subject:	Physical Geography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3433261
ISBN:	9781124386478

Assessing supraglacial water volume and the changing dynamics of the surface topography near the Jakobshavn Glacier, Greenland.
Adler, John J.

Assessing supraglacial water volume and the changing dynamics of the surface topography near the Jakobshavn Glacier, Greenland. - 159 p.

Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 0756.

Thesis (Ph.D.)--University of Colorado at Boulder, 2010.

On the Greenland Ice Sheet (GIS), the effect of the melt season's changing supraglacial lakes on outlet glacier discharge is not well understood. It is known that many supraglacial lakes drain rapidly during each melt season. While there are conflicting theories of the significance of supraglacial lake drainages towards enhancing ice sheet flow, it is highly important to quantify the actual water volume of supraglacial lakes since their drainage via crevasses or moulins enables the injection of melt water directly into the GIS.

ISBN: 9781124386478Subjects--Topical Terms:

893400
Physical Geography.

Assessing supraglacial water volume and the changing dynamics of the surface topography near the Jakobshavn Glacier, Greenland.
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020 $a 9781124386478
035 $a (UMI)AAI3433261
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100 1 $a Adler, John J. $3 1677801
245 1 0 $a Assessing supraglacial water volume and the changing dynamics of the surface topography near the Jakobshavn Glacier, Greenland.
300 $a 159 p.
500 $a Source: Dissertation Abstracts International, Volume: 72-02, Section: B, page: 0756.
500 $a Adviser: Konrad Steffen.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2010.
520 $a On the Greenland Ice Sheet (GIS), the effect of the melt season's changing supraglacial lakes on outlet glacier discharge is not well understood. It is known that many supraglacial lakes drain rapidly during each melt season. While there are conflicting theories of the significance of supraglacial lake drainages towards enhancing ice sheet flow, it is highly important to quantify the actual water volume of supraglacial lakes since their drainage via crevasses or moulins enables the injection of melt water directly into the GIS.
520 $a The 2008 Arctic MUltiSensor Cryospheric Observation eXperiment (Arctic MUSCOX) was the first scientific Unmanned Aircraft System (UAS) used in Greenland. The goal was determination of the changing volumes of supraglacial melt water lakes through the fusion of disparate data sets from in-situ, airborne, and satellite sensors. Near the Jakobshavn Isbrae region, four supraglacial lakes at different elevations along a transect at 68.73°N were monitored over the 2006, 2007, and 2008 melt seasons. The changing lake volumes are calculated for each day of usable MODIS imagery, employing DEM's from both ASTER Global and the MUSCOX lidar survey. During this three year period, no observed lake was larger in volume than 0.15km3, or larger in area than 10.4km2, implying a size limit for supraglacial lakes.
520 $a In this study a new technique is developed calculating runoff using daily changing albedo and surface height measurements (dH) from the Greenland Climatic Network (GC-Net) Automatic Weather Stations (AWS) at locations JAR1 and JAR2. Runoff is calculated on a daily basis, both regionally and for a 1,183km 2 inset strip straddling the transect. At JAR1 the calculated linear runoff for 2006, 2007, and 2008 is 1.79m, 1.99m, and 1.96m, respectively; at JAR2 the calculated runoff is 2.11m, 2.86m, and 2.40m, respectively. Regional projections are made that account for future atmospheric temperature increases between 0.5°C and 3.0°C; they indicate up to a 43.3% increase in the area available for the formation of supraglacial lakes in the GIS.
520 $a Finally, a proposal is presented to obtain scientific measurements of Arctic Key Parameters (AKP's) in the region's data sparse areas via UAS through the cooperation of the international community.
590 $a School code: 0051.
650 4 $a Physical Geography. $3 893400
650 4 $a Climate Change. $3 894284
650 4 $a Geomorphology. $3 542703
650 4 $a Remote Sensing. $3 1018559
690 $a 0368
690 $a 0404
690 $a 0484
690 $a 0799
710 2 $a University of Colorado at Boulder. $b Geography. $3 1038086
773 0 $t Dissertation Abstracts International $g 72-02B.
790 1 0 $a Steffen, Konrad, $e advisor
790 1 0 $a Maslanik, James $e committee member
790 1 0 $a Pielke, Roger, Jr. $e committee member
790 1 0 $a Serreze, Mark $e committee member
790 1 0 $a Blanken, Peter $e committee member
790 $a 0051
791 $a Ph.D.
792 $a 2010
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3433261