東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

The Influence of Subglacial Hydrolog...

Schild, Kristin M.

FindBook

Google Book

Amazon

博客來

The Influence of Subglacial Hydrology on Arctic Tidewater Glaciers and Fjords.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Influence of Subglacial Hydrology on Arctic Tidewater Glaciers and Fjords./
作者:	Schild, Kristin M.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	169 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
Contained By:	Dissertation Abstracts International79-01B(E).
標題:	Climate change. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10284000
ISBN:	9780355165999

The Influence of Subglacial Hydrology on Arctic Tidewater Glaciers and Fjords.
Schild, Kristin M.

The Influence of Subglacial Hydrology on Arctic Tidewater Glaciers and Fjords. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 169 p.

Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.

Thesis (Ph.D.)--Dartmouth College, 2017.

This item is not available from ProQuest Dissertations & Theses.

Mass loss from the Greenland Ice Sheet has accelerated throughout the last decade, predominantly due to a quadrupling of ice discharge by iceberg calving, submarine melting, and meltwater runoff at marine-terminating outlet glaciers. The recent acceleration has been linked to the transport of increasing amounts of meltwater, fuelled by warming temperatures. These processes include enhanced basal sliding, inefficient subglacial drainage networks, and a warming of ocean waters in contact with the glacier terminus. Understanding the impact of meltwater on tidewater glacier dynamics, both subglacially and proglacially, is a key component in predicting glacier health and future sea level rise. However, the spatial and temporal magnitude of this meltwater impact is poorly understood. The goals of this dissertation are to identify how meltwater travels subglacially through a tidewater glacier system, establish a method to monitor tidewater glacier discharge remotely, and calculate the impact of subglacial discharge on terminus stability..

ISBN: 9780355165999Subjects--Topical Terms:

2079509
Climate change.

The Influence of Subglacial Hydrology on Arctic Tidewater Glaciers and Fjords.
LDR:03540nmm a2200361 4500 001 2200423
005 20190315110954.5
008 201008s2017 ||||||||||||||||| ||eng d
020 $a 9780355165999
035 $a (MiAaPQ)AAI10284000
035 $a (MiAaPQ)dartmouth:11214
035 $a AAI10284000
040 $a MiAaPQ $c MiAaPQ
100 1 $a Schild, Kristin M. $3 3427171
245 1 4 $a The Influence of Subglacial Hydrology on Arctic Tidewater Glaciers and Fjords.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 169 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
500 $a Adviser: Robert L. Hawley.
502 $a Thesis (Ph.D.)--Dartmouth College, 2017.
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a Mass loss from the Greenland Ice Sheet has accelerated throughout the last decade, predominantly due to a quadrupling of ice discharge by iceberg calving, submarine melting, and meltwater runoff at marine-terminating outlet glaciers. The recent acceleration has been linked to the transport of increasing amounts of meltwater, fuelled by warming temperatures. These processes include enhanced basal sliding, inefficient subglacial drainage networks, and a warming of ocean waters in contact with the glacier terminus. Understanding the impact of meltwater on tidewater glacier dynamics, both subglacially and proglacially, is a key component in predicting glacier health and future sea level rise. However, the spatial and temporal magnitude of this meltwater impact is poorly understood. The goals of this dissertation are to identify how meltwater travels subglacially through a tidewater glacier system, establish a method to monitor tidewater glacier discharge remotely, and calculate the impact of subglacial discharge on terminus stability..
520 $a The inaccessibility of subglacial and terminus environments prohibits direct hydrological observations. We use combinations of remote sensing, reanalysis models, and in situ fjord data to accomplish these research goals by measuring indicators of subglacial meltwater discharge and fjord circulation (sediment plumes exiting the terminus and the movement of small icebergs in the fjord). By monitoring the timing and duration of plumes exiting a fast-flowing Greenland tidewater glacier, we found short-term variability in meltwater discharge, persistent subglacial pathways, and evidence of over-winter subglacial storage. Using glaciers in Svalbard, we established a new method to determine sediment concentration from Landsat--8 spectral reflectance, and used this sediment concentration to quantify relative seasonal meltwater discharge at tidewater glaciers. Finally, we used the movement of icebergs and ocean temperatures to establish a terminus submarine melt rate for along-terminus fjord circulation, and use this to isolate calving due solely to subglacial meltwater discharge.
520 $a The results of this dissertation help answer larger questions concerning the controls of water flow under a glacier and how that flow, and fjord circulation, influence glacier stability. Ultimately these results will inform coupled ice-ocean-climate models to predict glacier melt and sea level rise.
590 $a School code: 0059.
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Remote sensing. $3 535394
650 4 $a Physical oceanography. $3 3168433
650 4 $a Hydrologic sciences. $3 3168407
690 $a 0404
690 $a 0799
690 $a 0415
690 $a 0388
710 2 $a Dartmouth College. $b Earth Sciences. $3 3346281
773 0 $t Dissertation Abstracts International $g 79-01B(E).
790 $a 0059
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10284000