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Ice-margin change (advance/recession) at the terrestrial, lacustrine and marine margins of the south-western sector of the Greenland Ice Sheet between 1987 and 2015

A dataset of ice-margin change (advance/recession) at the south-western sector of the Greenland Ice Sheet, comprising data from 3325 terrestrial, 439 lacustrine and 35 marine ice-margins respectively. The dataset also comprises measures of ice-marginal lake parameters including area and intersect (length of the lake - ice-margin interface). Measurements were made at approximately five year intervals (epochs) from 1987 to 2015. The ice sheet margin and adjacent ice-marginal lakes were delineated by applying the Normalised Difference Snow Index (NDSI) and the Normalised Difference Water Index (NDWI) respectively to Landsat TM, ETM+ and OLI scenes. Ice-margin changes were measured relative to a series of fixed reference points. The dataset was generated to facilitate comparison of changes at the disparate ice-marginal environments of the ice sheet and investigate temporal patterns of ice-margin recession. The dataset was created and processed by researchers in the School of Geography at the University of Leeds and the Institute of Integrative Biology at the University of Liverpool.

Simple

Alternate title
Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01498
Date (Publication)
2021-05-13
Identifier
http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01498
Custodian
  British Antarctic Survey
High Cross, Madingley Road , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Originator
  NERC EDS UK Polar Data Centre - Mallalieu, J., Carrivick, J., Quincey, D., & Raby, C.
High Cross, Madingley , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Maintenance and update frequency
unknown Unknown
Keywords
  • NDGO0001
NERC OAI Harvesting
  • NERC_DDC
GCMD Parameter Valids
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Mass Balance/Ice Sheet Mass Balance
  • EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Mass Balance/Ice Sheet Mass Balance
  • EARTH SCIENCE > Hydrosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion
BAS Free-text keywords
  • Greenland Ice Sheet
  • ice-marginal lake
  • outlet glacier
  • proglacial lake
  • tidewater glacier
Use limitation
Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
Access constraints
otherRestrictions Other restrictions
Other constraints
Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.
Metadata language
EnglishEnglish
Topic category
  • Geoscientific information
  • Inland waters
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Begin date
1987-01-01
End date
2015-12-31
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
Distributor
  Polar Data Centre - British Antarctic Survey
+44 (0)1223 221400
Protocol
http
Name
GET DATA
Function
download Download
Hierarchy level
dataset Dataset

Domain consistency

Measure identification
INSPIRE / Conformity_001

Conformance result

Date
Explanation
See the referenced specification
Pass
No
Statement

The delineation of ice-margin and lake extent is assumed to be accurate to within ±1 pixel (30 m) of the true ice-margin/lake perimeter. Given the regional aggregation of measurements, it is assumed that any over-estimation of the ice-margin position is cancelled out by an equal and opposite under-estimation, and uncertainty in the ice-margin positions is therefore not specifically assessed for these bulk figures. In addition, the absolute error associated with each lake area measurement was dependent on lake size and planform, and thus resulted in a declining power law relationship whereby the greatest errors were associated with the smallest lakes. For example, lakes measuring 0.5 km2 had an area uncertainty of ~9 %, whilst lakes measuring > 5 km2 had an uncertainty of < 3 %.

Rates of change at lacustrine margins were only generated when a lake was present in two or more successive epochs.

Measurements of ice-margin change between 1987 and 1992 at the southernmost latitudes of the survey area are absent due to the unavailability of Landsat TM scenes for this region in the years 1985-1988.

File identifier
GB_NERC_BAS_PDC_01498 XML
Metadata language
EnglishEnglish
Hierarchy level
dataset Dataset
Date stamp
2021-05-13
Metadata standard name
NERC profile of ISO19115:2003
Metadata standard version
1.0
Point of contact
  British Antarctic Survey
+44 (0)1223 221400
Dataset URI
http://www.antarctica.ac.uk/dms/metadata.php?id=GB/NERC/BAS/PDC/01498
 
 

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Spatial extent

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Keywords


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