This dataset provides the data produced as part of the work published in: Leeson, A. A., Foster, E., Rice, A., Gourmelen, N. and van Wessem, J. M.. 2019. 'Evolution of supraglacial lakes on the Larsen B ice shelf in the decades before it collapsed' Geophysical Research Letters.
It includes 1) shapefiles of supraglacial lakes mapped in both optical (Landsat) and SAR (ERS) satellite imagery, 2) rasters of lake depth, derived from Landsat TM and ETM+ images acquired in 1988 and 2000 and 3) shapefiles of the study area considered in the paper.
Funding was provided by ERPSRC grant EP/R01860X/1.
Antarctica, Larsen B, observations, supraglacial lakes
Leeson, A., Foster, E., & Rice, A. (2020). Observations of supraglacial lakes on the Larsen B ice shelf in the decades before it collapsed, 1979-2002 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/90cde9d9-bc80-41d4-8102-d3d0bb58a029
|Access Constraints:||No restrictions apply.|
|Use Constraints:||This data is supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.|
|ISO Topic Categories:||
|Organisation||British Antarctic Survey|
|Role(s)||Investigator, Technical Contact|
|Reference:||Leeson, A. A., Foster, E., Rice, A., Gourmelen, N. and van Wessem, J. M.. 2019. 'Evolution of supraglacial lakes on the Larsen B ice shelf in the decades before it collapsed' Geophysical Research Letters|
|Quality:||Data are derived from all available, high quality satellite images acquired between November and March during 1979 and 2002 over the LBIS. These data are 8 optical satellite images acquired for 7 separate years by NASA/USGS's Landsat series and 13 Synthetic Aperture Radar (SAR) images acquired for 6 separate years by ESA's European Remote Sensing (ERS) platforms.|
|Lineage:||In order to compare lake characteristics between years, ERS data are radiometrically calibrated and georeferenced. SGLs are then manually delineated in ERS and automatically and manually delineated in Landsat . We quantify uncertainty associated with using two different sensors by digitizing lakes in a 52 km2 sample area in Landsat and ERS images acquired 2 days apart. We find that 7% more lakes are identified in ERS images, lakes are 16% larger on average in Landsat and cover an 8% greater area.|
|Horizontal Resolution Range||30 meters - < 100 meters|
|Vertical Resolution Range||N/A|
|Temporal Resolution Range||N/A|
|Detailed Location||Larsen B ice shelf|
|Data Collection:||Horizontal resolution is nominally 30 m, since this is the resolution of the satellite imagery from which the data is derived.
See Leeson et al., 2019 for details.
|Distribution Media||Online Internet (HTTP)|
|Distribution Size||43 MB|
|Data Storage:||FILENAME : FILE FORMAT : FILE SIZE : CONTENTS
'F5a_feb2_lakes' : Polygon : 316 KB : Delineated lakes from ERS2 image acquired 25/01/1996 used in Figure 5a.
'F5b_lakes' : Polygon : 32 KB : Delineated lakes from ERS2 image acquired 02/02/1997 used in Figure 5b.
'F5c_dec15_lakes' : Polygon : 266 KB : Delineated lakes from Landsat ETM+ image acquired 15th December 2001.
'F5c_dec31_lakes' : Polygon : 555 KB : Delineated lakes from Landsat ETM+ image acquired 31st December 2001.
'Feb1990_lakes' : Polygon : 8.5 MB : Delineated lakes from Landsat TM image acquired 09/02/1990.
'Feb1993_lakes' : Polygon : 234 KB : Delineated lakes from ERS1 image acquired 16/02/1993.
'Feb1997_lakes' : Polygon : 1.32 MB : Delineated lakes from ERS2 image acquired 02/02/1997.
'Feb1999_lakes' : Polygon : 1.26 MB : Delineated lakes from ERS2 images acquired 07/02/1999 and 10/02/1999.
'Feb2000_lakes' : Polygon : 401 KB : Delineated lakes from Landsat ETM+ image acquired 21/02/2000.
'Jan1988_lakes' : Polygon : 1.57 MB : Delineated lakes from Landsat TM image acquired 19/01/1988.
'Jan1996_lakes' : Polygon : 1 MB : Delineated lakes from ERS1 image acquired 23/01/1996 and ERS2 image acquired 25/01/1996.
'Lake_depth_1988' : Raster : 7 MB : Lake depths calculated using Landsat TM image acquired 19/01/1988.
'Lake_depth_feb_2000' : Raster : 7 MB : Lake depths calculated using Landsat ETM+ image acquired 21/02/2000.
''Lake_depth_jan_2000' : Raster : 7 MB : Lake depths calculated using Landsat ETM+ image acquired 27/01/2000.
'Lbis_gone_outline' : Polyline : 13 KB : Outline of the portion of the LBIS that collapsed in 2002. Landward extent picked from Bedmap2 (Fretwell, Pritchard et al. 2013), sea-ward extent traced from Landsat ETM+ image acquired 21/02/2002.
'Study_subregion' : Polygon : 11 KB : Subregion of LBIS used here for inter-annual analysis.