干旱区生态环境知识资源中心(Arid): The glacial landsystem of Fjallsjokull, Iceland: Spatial and temporal evolution of process-form regimes at an active temperate glacier

Arid

DOI	10.1016/j.geomorph.2020.107192
	The glacial landsystem of Fjallsjokull, Iceland: Spatial and temporal evolution of process-form regimes at an active temperate glacier
	Chandler, Benjamin M. P.; Evans, David J. A.; Chandler, Samuel J. P.; Ewertowski, Marek W.; Lovell, Harold; Roberts, David H.; Schaefer, Martin; Tomczyk, Aleksandra M.
通讯作者	Chandler, BMP
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	361
英文摘要	This study assesses the spatial and temporal evolution of the glacial landsystem signature at Fjallsjiikull, southeast Iceland, using (a) mapping of the glacial geomorphology and surficial geology and (b) repeat uncrewed aerial vehicle (UAV) surveys. A small-scale (1: 15,000 scale) landsystem map has been compiled using LiDAR data (2011-2012) and historical aerial photographs (1945-1998), along with a large-scale (1: 2000 scale) map based on UAV imagery from May 2019. From our mapping and UAV surveys, we identify sediment-landform assemblages that are typical of active temperate glacial landsystems, including recessional push/squeeze moraines and intervening flutings, overridden moraine arcs, proglacial outwash (sandur) fans and linear/ribbon sandar. We recognize three landform zones that are defined by changes in moraine morphology and the nature of proglacial outwash deposition: (1) the outer foreland is characterized by proglacial outwash fans, overridden moraine arcs and broadly linear recessional moraines; (2) the middle foreland contains sawtooth moraines and linear sandar; and (3) the innermost zone comprises extremely sawtooth and hairpin moraines as well as associated crevasse-squeeze ridge limbs. This landform zonation reflects spatio-temporal changes in moraineforming processes and outwash deposition as determined by changes in snout morphology arid proglacial drainage characteristics. Within this general tripartite zonation, we also identify localized (atonal/intrazonal) sediment-landform assemblages that are not typically found at active temperate glaciers, including ice-cored/hummocky terrain and localized kame and kettle topography. Repeat UAV surveying in 2016-2019 has allowed us to capture and quantify recent intrazonal landsystem change at the southern glacier margin. We identify a switch from moraine formation to the development of ice-cored terrain and an ice-cored esker complex in association with the uncovering of a depositional overdeepening,. Our study demonstrates the important role that variations in local boundary conditions (e.g. topography) can play in the process-form response of individual active temperate outlet glaciers, contributing to the expanding database on modern glacial landsystems. (C) 2020 The Authors. Published by Elsevier B.V.
英文关键词	Active temperate glacial landsystems Glacial landscape change Glacial geomorphological mapping UAV sun/eying Fjallsjokull Iceland
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	SCI-E
WOS记录号	WOS:000537570000003
WOS关键词	ICE-CORED MORAINES ; DEFORMATION BENEATH GLACIERS ; SUBGLACIAL TILL ; SOUTHEAST ICELAND ; GEOMORPHOLOGY ; SKALAFELLSJOKULL ; FORELAND ; SURGE ; FLOW ; RIDGES
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324618
作者单位	[Chandler, Benjamin M. P.; Chandler, Samuel J. P.; Lovell, Harold; Schaefer, Martin] Univ Portsmouth, Sch Environm Geog & Geosci, Portsmouth, Hants, England; [Chandler, Benjamin M. P.] Stockholm Univ, Dept Phys Geog, S-10691 Stockholm, Sweden; [Evans, David J. A.; Roberts, David H.] Univ Durham, Dept Geog, Durham, England; [Ewertowski, Marek W.; Tomczyk, Aleksandra M.] Adam Mickiewicz Univ, Fac Geog & Geol Sci, Poznan, Poland
推荐引用方式 GB/T 7714	Chandler, Benjamin M. P.,Evans, David J. A.,Chandler, Samuel J. P.,et al. The glacial landsystem of Fjallsjokull, Iceland: Spatial and temporal evolution of process-form regimes at an active temperate glacier[J],2020,361.
APA	Chandler, Benjamin M. P..,Evans, David J. A..,Chandler, Samuel J. P..,Ewertowski, Marek W..,Lovell, Harold.,...&Tomczyk, Aleksandra M..(2020).The glacial landsystem of Fjallsjokull, Iceland: Spatial and temporal evolution of process-form regimes at an active temperate glacier.GEOMORPHOLOGY,361.
MLA	Chandler, Benjamin M. P.,et al."The glacial landsystem of Fjallsjokull, Iceland: Spatial and temporal evolution of process-form regimes at an active temperate glacier".GEOMORPHOLOGY 361(2020).