Abstract:
Metrics of dark ice extent and duration, and snowline retreat estimates, for the south-west ablation zone of the Greenland Ice Sheet, derived from MODIS satellite imagery. These metrics are provided on a ~613 m grid at annual resolution and cover the melt season, defined as June-July-August each year. All scripts used to generate the metrics are also provided, as well as the scripts which generate the plots found in the referenced publication.
Funding was provided by the NERC grant NE/M021025/1.
Keywords:
Albedo, Dark ice, Greenland, Light-absorbing impurities
Tedstone, A. (2019). Dark ice dynamics of the south-west Greenland Ice Sheet, 2000-2016 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/c9079345-74a8-42af-8843-2151e6557e0f
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | This data is governed by the NERC data policy http://www.nerc.ac.uk/research/sites/data/policy/ and supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2018-11-05 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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| Personnel: | |
| Name | UK PDC |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Andrew Tedstone |
| Role(s) | Investigator, Technical Contact |
| Organisation | University of Edinburgh |
| Parent Dataset: | N/A |
| Reference: | Tedstone, A. J., Bamber, J. L., Cook, J. M., Williamson, C. J., Fettweis, X., Hodson, A. J., and Tranter, M.: Dark ice dynamics of the south-west Greenland Ice Sheet, The Cryosphere, 11, 2491-2506, https://doi.org/10.5194/tc-11-2491-2017, 2017. | |
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| Quality: | See publication, scripts and metadata embedded in the datasets. | |
| Lineage: | This study used MOD09GA C006 and MOD10A1 C006 data from MODIS sinusoidal grid locations h16v02 and h15v02. These data were downloaded using the tools in https://github.com/atedstone/get_modis. Data were stitched and regridded using stitch_warp_modis_l2.py then modisgtiff2nc.py in https://github.com/atedstone/modis_tools. The template file that was used with these tools is provided in this data collection (reproject.template). This processing chain generated daily mosaics of MODIS data that were saved to NetCDF files (not provided here) that were in turn used as inputs to the analysis scripts in https://github.com/atedstone/Tedstone2017_TheCryosphere_Scripts. |
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| Temporal Coverage: | |
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| Start Date | 2000-06-01 |
| End Date | 2016-08-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | 61.536 |
| Northernmost | 70.994 |
| Longitude | |
| Westernmost | -55.859 |
| Easternmost | -44.809 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | N/A |
| Longitude Resolution | N/A |
| Horizontal Resolution Range | 500 meters - < 1 km |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Arctic |
| Detailed Location | Greenland |
| Data Collection: | Instrumentation: GDAL, Python with associated libraries as detailed in script import calls. |
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| Data Storage: | MOD09GA.006.onset.2000-2016.bare60.dark45.JJA.win7.b3.d3.nc - 1 Gb. NetCDF file. Does not adhere to CF-1.6. The proj4 string that describes this dataset is the same as those embedded in the geoTIFFs below and also provided in reproject.template. mask_dark_common_area_7.5km.tif - 25 kb. GeoTIFF. mask_dark_common_area_613m.tif - 3.6 mb. GeoTIFF. Reproject.template - 1kb. Text file containing input parameters to MODIS stitching workflow. |
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