气候变化领域集成服务门户(CCPortal): Linking catchment-scale subglacial discharge to subsurface glacially modified waters near the front of a marine terminating outlet glacier using an autonomous underwater vehicle

CCPortal

DOI	10.5194/tcd-9-4583-2015
	Linking catchment-scale subglacial discharge to subsurface glacially modified waters near the front of a marine terminating outlet glacier using an autonomous underwater vehicle
	Stevens L.A.; Straneo F.; Das S.B.; Plueddemann A.J.; Kukulya A.L.; Morlighem M.
发表日期	2015
ISSN	19940432
卷号	9 期号:5
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 150 m from the ice/ocean interface of the Sarqardliup 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 localized in space and with distinct properties that are consistent with runoff discharged at two locations along the grounded margin. These locations, in turn, correspond with two prominent subglacial subcatchments beneath Sarqardliup sermia. Thus, near-ice observations and subglacial discharge routing indicate that subglacial discharge from this glacier occurs at only two primary locations and gives rise to two distinct glacially modified waters. Furthermore, we show that the location with the largest discharge flux is associated with the lighter, fresher glacially modified watermass. This is qualitatively consistent with results from an idealized plume model. © Author(s) 2015.
学科领域	autonomous underwater vehicle; bathymetry; catchment; discharge; glacial hydrology; hydrography; ice breakup; ice-ocean interaction; runoff; subglacial deposit; subsurface flow; Arctic; Greenland; Sarqardleq Fjord; West Greenland
语种	英语
scopus关键词	autonomous underwater vehicle; bathymetry; catchment; discharge; glacial hydrology; hydrography; ice breakup; ice-ocean interaction; runoff; subglacial deposit; subsurface flow; Arctic; Greenland; Sarqardleq Fjord; West Greenland
来源期刊	Cryosphere Discussions
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119824
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 catchment-scale subglacial discharge to subsurface glacially modified waters near the front of a marine terminating outlet glacier using an autonomous underwater vehicle[J],2015,9(5).
APA	Stevens L.A.,Straneo F.,Das S.B.,Plueddemann A.J.,Kukulya A.L.,&Morlighem M..(2015).Linking catchment-scale subglacial discharge to subsurface glacially modified waters near the front of a marine terminating outlet glacier using an autonomous underwater vehicle.Cryosphere Discussions,9(5).
MLA	Stevens L.A.,et al."Linking catchment-scale subglacial discharge to subsurface glacially modified waters near the front of a marine terminating outlet glacier using an autonomous underwater vehicle".Cryosphere Discussions 9.5(2015).