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Detecting Land Elevation Change in the Polar Regions Using High Resolution Remote Sensing Techniques.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Detecting Land Elevation Change in the Polar Regions Using High Resolution Remote Sensing Techniques./
作者:	Hansen, Jasmine Siena Sarling.
面頁冊數:	1 online resource (146 pages)
附註:	Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
Contained By:	Dissertations Abstracts International85-03B.
標題:	Geology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30567327click for full text (PQDT)
ISBN:	9798380164641

Detecting Land Elevation Change in the Polar Regions Using High Resolution Remote Sensing Techniques.
Hansen, Jasmine Siena Sarling.

Detecting Land Elevation Change in the Polar Regions Using High Resolution Remote Sensing Techniques. - 1 online resource (146 pages)

Source: Dissertations Abstracts International, Volume: 85-03, Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2023.

Includes bibliographical references

Degradation of the Antarctic and Greenland ice sheets, occurring in response to a warming climate is causing in variations in surface land height driven by both surface and subsurface processes. This work seeks to improve our understanding of how the Earth is deforming at the edge of ice sheets using high resolution remotely sensed observations. Deformation of the solid Earth at the edge of ice sheets is driven by a combination of glacial isostatic adjustment (GIA) and crustal elastic deformation. Accurate characterization of crustal elastic deformation is necessary to generate robust GIA model solutions and provide corrections for gravimetric datasets. In Chapter II I evaluate the accuracy of current modeled elastic uplift estimates at ANET-POLENET GNSS sites in the Amundsen Sea Embayment by creating sub meter resolution grids of ice surface change and using these grids in elastic modeling experiments. These experiments reveal that grid resolutions up to 6 km are appropriate to characterize elastic deformation at GNSS sites in our study and reveal a 5 km 'Zone of Influence' that suggests high resolutions are needed at locations with large spatial change gradients. The finding of the 'Zone of Influence' guides the research of Chapter III that seeks to generate spatially continuous observations of elastic flexure from interferometric synthetic aperture radar (InSAR). InSAR vertical land motion (VLM) datasets capture regional elastic deformation fields appropriately but struggle to capture locally induced elastic fields and are impacted by accurate bedrock delineation. Finally, the techniques developed in Chapters II and III are used to characterize deformation occurring in the actively evolving Kigarsima landslide in west Greenland. InSAR derived velocity maps reveal two deformation styles controlled by water availability and highlight the ability of InSAR datasets to detect fine scale deformation undetectable by optically derived digital elevation models.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798380164641Subjects--Topical Terms:

516570
Geology.
Subjects--Index Terms:

GIAIndex Terms--Genre/Form:

542853
Electronic books.

Detecting Land Elevation Change in the Polar Regions Using High Resolution Remote Sensing Techniques.
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