Abstract:
These files are surface elevation determined from swath processing of data acquired by the interferometric radar altimeter CryoSat-2. The data have been collected and processed over the Antarctic Ice Sheet between 2011 and 2016. These data have been processed by the University of Edinburgh and are made publicly available as part of the European Space Agency funded project CryoTop and CryoTop Evolution involving the University of Edinburgh, isardSat UK, University of Leeds-CPOM, ENVEO.
Keywords:
Altimetry, Antarctic Ice Sheet, Climate, CryoSat-2, Elevation
Gourmelen, N., & Weissgerber, F. (2019). Swath elevation from CryoSat-2 over the Antarctic ice Sheet, 2011-2016 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/926b5321-408f-4560-b72d-f38bbe97ac21
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | This data is supplied under Open Government Licence v3 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. |
| Creation Date: | 2019-02-07 |
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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 | Noel Gourmelen |
| Role(s) | Technical Contact, Investigator |
| Organisation | University of Edinburgh |
| Name | Flora Weissgerber |
| Role(s) | Investigator, Technical Contact |
| Organisation | University of Edinburgh |
| Name | Maria Jose Escorihuela |
| Role(s) | Investigator |
| Organisation | isardSat |
| Name | Monica Roca |
| Role(s) | Investigator |
| Organisation | isardSat |
| Name | Anna Hogg |
| Role(s) | Investigator |
| Organisation | University of Leeds |
| Name | Jan Wuite |
| Role(s) | Investigator |
| Organisation | ENVEO |
| Name | Tom Nagler |
| Role(s) | Investigator |
| Organisation | ENVEO |
| Name | Mark Drinkwater |
| Role(s) | Investigator |
| Organisation | European Space Agency |
| Parent Dataset: | N/A |
| Reference: | Gourmelen, N, Escorihuela, M, Shepherd, A, Foresta, L, Muir, A, Garcia-Mondejar, A, Roca, M, Baker, S & Drinkwater, MR 2017, 'CryoSat-2 swath interferometric altimetry for mapping ice elevation and elevation change' Advances in Space Research. DOI: 10.1016/j.asr.2017.11.014 Gourmelen, N, Goldberg, D, Snow, K, Henley, S, Bingham, RG, Kimura, S, Hogg, A, Shepherd, A, Mouginot, J, Lenaerts, JTM, Ligtenberg, SRM & van de Berg, WJ 2017, 'Channelized melting drives thinning under a rapidly melting Antarctic ice shelf' Geophysical Research Letters. DOI: 10.1002/2017GL074929 Goldberg, D, Gourmelen, N, Snow, K, Kimura, S & Millan, R 2018, 'How accurately should we model ice shelf melt rates?' Geophysical Research Letters. DOI: 10.1029/2018GL080383 Christie, FDW, Bingham, RG, Gourmelen, N, Steig, E, Bisset, R, Pritchard, HD, Snow, K & Tett, S 2018, 'Glacier change along West Antarctica's Marie Byrd Land Sector and links to inter-decadal atmosphere-ocean variability' Cryosphere. DOI: 10.5194/tc-12-2461-2018 Smith, BE, Gourmelen, N, Huth, A & Joughin, I 2017, 'Connected subglacial lake drainage beneath Thwaites Glacier, West Antarctica' Cryosphere. DOI: 10.5194/tc-11-451-2017 Christie, FDW, Bingham, RG, Gourmelen, N, Tett, SFB & Muto, A 2016, 'Four-decade record of pervasive grounding line retreat along the Bellingshausen margin of West Antarctica' Geophysical Research Letters. DOI: 10.1002/2016GL068972 |
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| Quality: | There is a minimal amount of editing of the data as to provide maximum flexibility. The user should therefore use caution, as the dataset will contain measurements of variable quality. The user should make use of the quality estimator provided, e.g. signal coherence and signal power. A typical minimum value of coherence is 0.8 and a typical minimum value of power is -170. It is also recommended to the user to check for remaining errors using a reference DEM (e.g. Bedmap2, REMA, TanDEM-X) as to identify remaining data blunders that would originate from sensor or processing errors. Details of data quality, potential issues, and validations can be found in Gourmelen et al., 2017 and in literature listed here. | |
| Lineage: | The swath elevation data are produced from CryoSat-2 as described in the following paper: Gourmelen, N, Escorihuela, M, Shepherd, A, Foresta, L, Muir, A, Garcia-Mondejar, A, Roca, M, Baker, S & Drinkwater, MR 2017, 'CryoSat-2 swath interferometric altimetry for mapping ice elevation and elevation change' Advances in Space Research. DOI: 10.1016/j.asr.2017.11.014 |
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| Temporal Coverage: | |
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| Start Date | 2011-01-01 |
| End Date | 2016-12-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -88 |
| Northernmost | -60 |
| Longitude | |
| Westernmost | -180 |
| Easternmost | 180 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Antarctic Ice Sheet |
| Data Collection: | CryoSat-2 spaceborne interferometric radar altimeter. |
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| Data Storage: | Data are distributed as netcdf files containing 7 fields: Latitude (lat) Longitude (lon) Elevation above the ellipsoid (elev) Power in dB (powerdB) Coherence (coh) Sample number (sampleNb) Waveform number (wf_number) The last 2 parameters are given so that users can retrace the origin of a given measurement to the original, L1b, CryoSat data. The file name follows the CryoSat2's file name convention (http://wiki.services.eoportal.org/tiki-index.php?page=CryoSat+Wiki), replacing the string for 'L1B' by '2S' as in level 2 swath product |
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