David J A Evans

Dados Biográficos

ID1821665
NOMEDavid J A Evans
PRENOMESDavid J A
SOBRENOMEEvans
ASSINATURAEVANS D J A
AFILIAÇÕESDurham University
ORCID0000-0002-1840-2513
VERIFICADOSim
TOTAL DE OBRAS34
TOTAL DE CITAÇÕES18
TOTAL COMO AUTOR34
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO1988
ANO MAIS RECENTE DE PUBLICAÇÃO2023
ÍNDICE H2

  • Quantification of short‐term transformations of proglacial landforms in a temperate, debris‐charged glacial landsystem, Kvíárjökull, Iceland

    Open AccessSzymon Śledź, Marek Ewertowski et al.ARTICLELand Degradation and Development2023

    Proglacial areas are dynamic landscapes and important indicators of geomorphic changes related to climate warming. Systematic and repeat surveys of landforms presently evolving on glacier forelands facilitate the quantification of rates of change and an improved understanding of the processes generating those changes. We report short‐term (2014–2022) transformations of the proglacial landscape in front of Kvíárjökull, SE Iceland, and place them i…

  • Periglacial landforms of Dartmoor

    Open AccessSadie Harriott, David J A EvansARTICLEScottish Geographical Journal2022

    A systematic mapping approach characterizes Dartmoor periglacial landform signatures using the geomorphology of nine summit areas displaying well developed tor and blockfield landforms. This combines manual vectorisation with automatic classification and surface boulder identification, using spectral signatures to reveal patterns and distribution. Tors were classified using a three-fold scheme: T0 -summits with no tors; T1 -summits with castellat…

  • Glacitectonic rafts and their role in the generation of Quaternary subglacial bedforms and deposits

    Open AccessDavid J A Evans, Emrys Phillips et al.ARTICLEQuaternary Research2021

    Landforms and sediments on the palaeo–ice stream beds of central Alberta record glacitectonic raft production and subsequent progressive disaggregation and moulding, associated substrate ploughing, and grooving. We identify a subglacial temporal or developmental hierarchy that begins with incipient rafts, including en échelon hill-hole complexes, hill-hole pairs, and strike-slip raft complexes, all of which display patterns typical of transcurren…

  • Glacial and periglacial geomorphology of central Troms and Finnmark county, Arctic Norway

    Open AccessJ R Leigh, David J A Evans et al.ARTICLEJournal of Maps2021

    Here we present a glacial and periglacial geomorphological map of a ∼6800 km2 region of central Troms and Finnmark county, Arctic Norway. The map is presented at a 1:115,000 scale with the aim of characterising the spatial distribution of glacial and periglacial landforms and facilitating the reconstruction of the glacial history of the region during the latter stages of deglaciation from the Last Glacial Maximum and into the Holocene. Mapping wa…

  • Skaftafellsjökull, Iceland

    Open AccessDavid J A Evans, Marek Ewertowski et al.ARTICLEJournal of Maps2017

    A 1:5700 scale map of the recently deglaciated foreland of Skaftafellsjökull, Iceland as it appeared in 2007, depicts a typical active temperate glacial landsystem with a clear pattern of sequentially changing push moraine morphologies, including remarkable hairpin-shaped moraines, indicative of spatial and temporal variability in process-form regimes in glacier sub-marginal settings. Similar to other Icelandic glacier forelands, this demonstrate…

  • Periglacial geomorphology of summit tors on Bodmin Moor, Cornwall, SW England

    Open AccessDavid J A Evans, Ria Kalyan et al.ARTICLEJournal of Maps2017

    Three maps are presented that portray the periglacial geomorphology of the three summit areas of Bodmin Moor, Cornwall, SW England, including Brown Willy (scale 1:2630), Kilmar/Bearah/Sharp tors (scale 1:3335) and Rough/Little Rough/Showery tors (scale 1:2175). Landform elements include castellated tors with well-developed cantilevered or precariously balanced corestones, summit blockfields, rock-fronted lobes thought to record former permafrost …

  • The glaciated valley landsystem of Morsárjökull, southeast Iceland

    Open AccessDavid J A Evans, Marek Ewertowski et al.ARTICLEJournal of Maps2017

    A 1:4470 map of the Morsárjökull foreland, southern Iceland shows the spatial distribution of post Little Ice Age glacial sediment–landform associations pertaining to the operation of a typical active temperate outlet glacier of the south Vatnajökull ice cap. The map depicts an exemplar for the debris-charged glaciated valley landsystem, with characteristics further indicative of ‘uncovered alpine glaciers’, such as the uneven distribution of mor…

  • Royal Geographical Society (with IBG) Medals and Awards celebration 2017

    Open AccessNicholas Jon Crane, Nicholas Crane et al.ARTICLEGeographical Journal2017Referências: 1

    The Royal Geographical Society (with IBG) annual Medals and Awards recognise achievements in researching, communicating and teaching a wide range of geographical knowledge. The speeches and citations are a record of the 2017 celebration, with contributions by Sir Gordon Conway and Lindsey Hilsum, and Professors Andrew Cliff, David J A Evans and Henry Wai-chung Yeung. The speeches include comments on the importance of geography for mapping extreme…

  • Snæfellsjökull volcano-centred ice cap landsystem, West Iceland

    Open AccessDavid J A Evans, Marek Ewertowski et al.ARTICLEJournal of Maps2016

    A 1:10,526 scale map of Snæfellsjökull and its forelands is presented as the first landsystem exemplar of volcano-centred ice caps, for application to understanding glacierized volcanic terrains globally. Mapping of surface materials and landforms was undertaken using orthorectified aerial photographs taken in 2002 and results of ground truth fieldwork in 2010. Nine natural surficial geology units were identified in addition to bedrock, glacier i…

  • Glacial geomorphology of the Skálafellsjökull foreland, Iceland

    Open AccessBenjamin M P Chandler, David J A Evans et al.ARTICLEJournal of Maps2016

    Small-scale recessional push moraines are a characteristic signature of the active temperate glacial landsystem, and are often clearly linked to annual re-advances. These recessional push moraines represent a potentially valuable terrestrial climate archive, and may provide valuable insights into glacier dynamics. This paper presents detailed glacial geomorphological maps of recessional push moraines on the foreland of Skálafellsjökull, SE Icelan…

  • Fláajökull (north lobe), Iceland

    Open AccessDavid J A Evans, Marek Ewertowski et al.ARTICLEJournal of Maps2016

    A 1:6250 map of the foreland of Fláajökull's north lobe as it appeared in 1989, together with a 1:350 scale map of a sample area of recently exposed glacial landforms from 2014, enables an assessment of the spatial and temporal evolution of glacial landform assemblages at the margin of an active temperate piedmont lobe terminating at ice-marginal thickening till wedges. The pattern of landform development captured in these maps indicates that the…

  • Eiríksjökull plateau icefield landsystem, Iceland

    Open AccessDavid J A Evans, Marek Ewertowski et al.ARTICLEJournal of Maps2016

    A 1:9500 scale map of the Eiríksjökull plateau icefield and its post-Little Ice Age (LIA) foreland geomorphology and surficial geology is presented as a modern exemplar of an asymmetrically developed mountain glacier typical of the style of glacierization that dominated during mid-latitude Quaternary cold stages. Features regarded as diagnostic for this setting include (a) ice-cored hummocky terrain, indicative of controlled moraine construction …

  • Glacial geomorphology of the terrestrial margins of the tidewater glacier, Nordenskiöldbreen, Svalbard

    Open AccessMarek Ewertowski, David J A Evans et al.ARTICLEJournal of Maps2016

    A 1:4000 scale map of the terrestrial margins of the foreland of Nordenskiöldbreen depicts a polythermal glacial landsystem containing a record of the landform signatures of individual ice flow units that operate within the glacier snout. A 1:700 map provides a detailed overview of fluted terrain, based on unmanned aerial vehicle images captured in 2014. The pattern of landforms lying inside the Little Ice Age (LIA) latero-frontal moraine on the …

  • The glacial geomorphology of the Loch Lomond Stadial in Britain

    Open AccessH L Bickerdike, David J A Evans et al.ARTICLEJournal of Maps2016

    The Loch Lomond Stadial (LLS) was an abrupt period of renewed cooling between 12.9 and 11.7 ka and has long been associated with the regrowth of glaciers in much of upland Britain. Mapping the glacial landforms associated with this period has been undertaken for over a century, but in a non-systematic nature and at specific locations. In this paper, glacial geomorphology associated with the LLS in Britain has been compiled from the published lite…

  • Surficial geology and geomorphology of the Kumtor Gold Mine, Kyrgyzstan

    Open AccessDavid J A Evans, Marek Ewertowski et al.ARTICLEJournal of Maps2016

    A 1:50,000 scale map of the surficial geology and geomorphology of the mountain glacier landsystem and the human impacts of the Kumtor Gold Mine operations in the Akshiirak massif was compiled from a 0.5 m resolution pan-sharpened image from Digital Globe's WorldView-2 platform dated 5 September 2014. The map depicts 11 surficial geology units, 6 of which are classified according to natural genetic origins and 5 relating to recent human interfere…

  • Heinabergsjökull and Skalafellsjökull, Iceland

    Open AccessDavid J A Evans, Chris OrtonARTICLEJournal of Maps2015

    A 1:15,000 scale map of the glacial geomorphology and surficial geology of the Heinabergsjökull and Skalafellsjökull glacier forelands in southeast Iceland depicts a landsystem imprint of actively receding temperate glaciers in a mountain terrain with a high glacifluvial sediment yield. The landsystem is characterised by the three diagnostic depositional domains for active temperate glacier systems (marginal morainic; subglacial; glacifluvial/gla…

  • Sediment fingerprinting and the mode of formation of singular and composite annual moraine ridges at two glacier margins, Jotunheimen, southern Norway

    Open AccessJohn F Hiemstra, John A Matthews et al.ARTICLEThe Holocene2015Referências: 16

    Sedimentary variation within and between annual moraine ridges formed at Storbreen and Styggedalsbreen, Jotunheimen, during the 1980s and 1990s is investigated with a focus on processes and mechanisms of moraine-ridge formation. Tops and bottoms of sediment slabs, deposited either as single annual moraines or incorporated into composite moraine ridges formed of several annual increments, were analysed and compared with possible source sediments w…

  • A map of large Canadian eskers from Landsat satellite imagery

    Open AccessRobert D Storrar, Chris R Stokes et al.ARTICLEJournal of Maps2013

    Meltwater drainage systems beneath ice sheets are a poorly understood, yet fundamentally important environment for understanding glacier dynamics, which are strongly influenced by the nature and quantity of meltwater entering the subglacial system. Contemporary sub-ice sheet meltwater drainage systems are notoriously difficult to study, but we can utilise exposed beds of palaeo-ice sheets to further our understanding of subglacial drainage. In pa…

  • Spatial and temporal change in glacial landsystems

    Open AccessDavid J A EvansARTICLEQuaternary International2012

  • The spatial variability of sediment– landform assemblages within a High Arctic controlled moraine landsystem – a new geomorphological map of Hørbye Glacier, Svalbard

    Open AccessDavid J A EvansARTICLEQuaternary International2012

  • The Glacial Geomorphology and Surficial Geology of the South-West English Lake District

    Open AccessVictoria H Brown, David J A Evans et al.ARTICLEJournal of Maps2011

    Please click here to download the map associated with this article. The glacial geomorphology of the south-west Lake District has been mapped over 98 km using 1:10,000 aerial photography, Google Earth images and a high resolution digital elevation model (NEXTMap). The area is subdivided into two map sheets (eastern and western) and includes Upper Eskdale, the Langdales, the valleys surrounding Wastwater and the neighbouring valley of Ennerdale. T…

  • Evolution of a debris-charged glacier landsystem, Kvíárjökull, Iceland

    Open AccessGeorgina L Bennett, David J A Evans et al.ARTICLEJournal of Maps2010

    Please click here to download the map associated with this article. A time-series of 1:12,500 scale maps of the snout and foreland of the Icelandic glacier Kvíárjökull provides a spatial and temporal assessment of landform evolution from a debris-charged glacier snout over a 58 year period between 1945 and 2003. In addition to providing a valuable record of glacier recession over a period of recent global warming, the maps enable the elaboration …

  • Satujökull glacial landsystem, Iceland

    Open AccessDavid J A Evans, David R Twigg et al.ARTICLEJournal of Maps2010

    Please click here to download the map associated with this article. A surficial geology and geomorphology map of the Satujökull foreland of the northern Hofsjökull ice cap in central Iceland provides a clear signature of spatial and temporal change in glacial landsystem signatures as a result of complex glacier behaviour in the historical period. Landsystem 1, indicative of polythermal conditions, comprises a wide arc of ice-cored moraine and con…

  • Surging glacier landsystem of Tungnaárjökull, Iceland

    Open AccessDavid J A Evans, David R Twigg et al.ARTICLEJournal of Maps2009

    Please click here to download the map associated with this article. A1:30,000 scale map of the snout and proglacial landscape of the surging Icelandic glacier Tungnaárjökull, based upon aerial photography from 1995, immediately after a surge, allows an assessment of the spatial variability in landform-sediment imprints of catastrophic glacier advance across upland bedrock ridges. The ice-margin parallel alignment of the bedrock ridges locally str…

  • Glacial geomorphology of the central sector of the last British-Irish Ice Sheet

    Open AccessStephen J Livingstone, Colm Ó Cofaigh et al.ARTICLEJournal of Maps2008

    Please click here to download the map associated with this article. We here present a glacial geomorphological map covering 11,800 km2, at a scale of 1:550,000, of the central sector of the last (Main Late Devensian) British-Irish Ice Sheet. The map is based on the 5 m resolution NEXTMap dataset. Six landform types have been mapped; subglacial lineations, hummocky terrain, ribbed moraine, meltwater channels, eskers and glaciofluvial sediment accu…