globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-10-417-2016
Scopus记录号: 2-s2.0-84959345706
论文题名:
Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations
作者: Stevens L; A; , Straneo F; , Das S; B; , Plueddemann A; J; , Kukulya A; L; , Morlighem M
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期:1
起始页码: 417
结束页码: 432
语种: 英语
英文关键词: autonomous underwater vehicle ; bathymetry ; catchment ; discharge ; glacial hydrology ; hydrography ; meltwater ; runoff ; subglacial environment ; water mass ; Arctic ; Greenland ; West Greenland
英文摘要: Measurements of near-ice ( <200 m) hydrography and near-terminus subglacial hydrology are lacking, due in large part to the difficulty in working at the margin of calving glaciers. Here we pair detailed hydrographic and bathymetric measurements collected with an autonomous underwater vehicle as close as 150m from the ice-ocean interface of the Saqqarliup sermia-Sarqardleq Fjord system,West Greenland, with modeled and observed subglacial discharge locations and magnitudes. We find evidence of two main types of subsurface glacially modified water (GMW) with distinct properties and locations. The two GMW locations also align with modeled runoff discharged at separate locations along the grounded margin corresponding with two prominent subcatchments beneath Saqqarliup sermia. Thus, near-ice observations and subglacial discharge routing indicate that runoff from this glacier occurs primarily at two discrete locations and gives rise to two distinct glacially modified waters. Furthermore, we show that the location with the largest subglacial discharge is associated with the lighter, fresher glacially modified water mass. This is qualitatively consistent with results from an idealized plume model. © 2016 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75184
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Massachusetts Institute of Technology, Woods Hole Oceanographic Institution Joint Program in Oceanography, Applied Ocean Science and Engineering, Woods Hole, MA, United States; Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Department of Earth System Science, University of California, Irvine, Croul Hall, Irvine, CA, United States

Recommended Citation:
Stevens L,A,, Straneo F,et al. Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations[J]. Cryosphere,2016-01-01,10(1)
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