Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL073602 |
Near-glacier surveying of a subglacial discharge plume: Implications for plume parameterizations | |
Jackson, R. H.1; Shroyer, E. L.1; Nash, J. D.1; Sutherland, D. A.2; Carroll, D.2; Fried, M. J.3,4; Catania, G. A.3,4; Bartholomaus, T. C.5; Stearns, L. A.6 | |
2017-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | At tidewater glaciers, plume dynamics affect submarine melting, fjord circulation, and the mixing of meltwater. Models often rely on buoyant plume theory to parameterize plumes and submarine melting; however, these parameterizations are largely untested due to a dearth of near-glacier measurements. Here we present a high-resolution ocean survey by ship and remotely operated boat near the terminus of Kangerlussuup Sermia in west Greenland. These novel observations reveal the 3-D structure and transport of a near-surface plume, originating at a large undercut conduit in the glacier terminus, that is inconsistent with axisymmetric plume theory, the most common representation of plumes in ocean-glacier models. Instead, the observations suggest a wider upwelling plume-a "truncated" line plume of similar to 200 m width-with higher entrainment and plume-driven melt compared to the typical axisymmetric representation. Our results highlight the importance of a subglacial outlet's geometry in controlling plume dynamics, with implications for parameterizing the exchange flow and submarine melt in glacial fjord models. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406257400049 |
WOS关键词 | GREENLAND ICE-SHEET ; TIDEWATER GLACIER ; SUBMARINE MELT ; EAST GREENLAND ; OCEAN WATERS ; IMPACT ; FJORD ; HEAT ; CONVECTION ; TERMINUS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26695 |
专题 | 气候变化 |
作者单位 | 1.Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR 97331 USA; 2.Univ Oregon, Dept Earth Sci, Eugene, OR 97403 USA; 3.Univ Texas Austin, Inst Geophys, Austin, TX USA; 4.Univ Texas Austin, Dept Geol Sci, Austin, TX USA; 5.Univ Idaho, Dept Geog, Moscow, ID 83843 USA; 6.Univ Kansas, Dept Geol, Lawrence, KS 66045 USA |
推荐引用方式 GB/T 7714 | Jackson, R. H.,Shroyer, E. L.,Nash, J. D.,et al. Near-glacier surveying of a subglacial discharge plume: Implications for plume parameterizations[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13). |
APA | Jackson, R. H..,Shroyer, E. L..,Nash, J. D..,Sutherland, D. A..,Carroll, D..,...&Stearns, L. A..(2017).Near-glacier surveying of a subglacial discharge plume: Implications for plume parameterizations.GEOPHYSICAL RESEARCH LETTERS,44(13). |
MLA | Jackson, R. H.,et al."Near-glacier surveying of a subglacial discharge plume: Implications for plume parameterizations".GEOPHYSICAL RESEARCH LETTERS 44.13(2017). |
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