气候变化领域集成服务门户(CCPortal): Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations

CCPortal

DOI	10.5194/tc-10-417-2016
	Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations
	Stevens L.A.; Straneo F.; Das S.B.; Plueddemann A.J.; Kukulya A.L.; Morlighem M.
发表日期	2016
ISSN	19940416
卷号	10 期号:1
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).
学科领域	autonomous underwater vehicle; bathymetry; catchment; discharge; glacial hydrology; hydrography; meltwater; runoff; subglacial environment; water mass; Arctic; Greenland; West Greenland
语种	英语
scopus关键词	autonomous underwater vehicle; bathymetry; catchment; discharge; glacial hydrology; hydrography; meltwater; runoff; subglacial environment; water mass; Arctic; Greenland; West Greenland
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119700
作者单位	Massachusetts Institute of Technology, Woods Hole Oceanographic Institution Joint Program in Oceanography, Applied Ocean Science and Engineering, Woods Hole, MA 02543, United States; Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Earth System Science, University of California, Irvine, Croul Hall, Irvine, CA 92697, United States
推荐引用方式 GB/T 7714	Stevens L.A.,Straneo F.,Das S.B.,et al. Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations[J],2016,10(1).
APA	Stevens L.A.,Straneo F.,Das S.B.,Plueddemann A.J.,Kukulya A.L.,&Morlighem M..(2016).Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations.Cryosphere,10(1).
MLA	Stevens L.A.,et al."Linking glacially modified waters to catchment-scale subglacial discharge using autonomous underwater vehicle observations".Cryosphere 10.1(2016).