Antarctic Peninsula melt season durations based on level 1 ASCAT scatterometer data, 2017-2020
GB/NERC/BAS/PDC/01318
Abstract:
Three datasets of melt season duration in days covering the Antarctic Peninsula for the austral yeas of 2017/2018, 2018/2019 and 2019/2020. The datasets are based on ASCAT GDS Level 1 Sigma0 Swath Grid data from the EUMETSAT archive (archive.eumetsat.int/usc/) and extend an earlier time series based on enhanced QuikSCAT and ASCAT data (doi:10.5285/e3616d28-759e-4cca-8fae-fe398f9552ba). The data are supplied as GeoTIFFs.
Funding was provided from the NERC grant NE/L005409/1.
Citation:
Bevan, S., & Luckman, A. (2020). Antarctic Peninsula melt season durations based on level 1 ASCAT scatterometer data, 2017-2020 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/cfa4cc5d-3ea9-4c3c-8d6b-6b92a81bb2af
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License
| Use: | 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/. |
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Basic Information
| Creation Date: | 2020-04-08 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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Additional Information
| Reference: | Methodology described in detail in: Bevan, S.L., Luckman, A.J., Kuipers Munneke, P., Hubbard, B., Kulessa, B., Ashmore, D.W., 2018. Decline in Surface Melt Duration on Larsen C Ice Shelf Revealed by The Advanced Scatterometer (ASCAT). Earth and Space Science 5, 578-591. https://doi.org/10.1029/2018ea000421 Bevan, S., Luckman, A., Hendon, H., and Wang, G.: The 2020 Larsen C Ice Shelf surface melt is a 40-year record high, The Cryosphere, 14, 3551-3564, https://doi.org/10.5194/tc-14-3551-2020, 2020. |
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| Quality: | Scatterometer data were missing between 12/12/2017 and 02/01/2018, and between 17/12/2018 and 15/01/2019. The data for 2019/2020 only go to 17/04/2020. Therefore there is the possibility that melt durations are underestimated. However, the affect of the 2017, 2018 and 2019 missing data is minimal as most melt takes place later in the summer. | |
| Lineage/Methodology: | ASCAT GDS Level 1 Sigma0 Swath Grid data were downloaded from the EUMETSAT archive (archive.eumetsat.int/usc/). Daily composites were created by taking the minimum of the mid-beam data of all overpasses by the METOPA and METOPB satellites. If the backscatter value was more than 2.7 dB below the mean of the previous winter (June, July, August) then liquid water was assumed to be present. Melt days were summed over the austral year August to July. | |
Extent
| Temporal Coverage: | |
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| Start Date | 2017-12-01 |
| End Date | 2020-04-17 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -68.54 |
| Northernmost | -64.68 |
| Longitude | |
| Westernmost | -79.7 |
| Easternmost | -32 |
| 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 | 10 km - < 50 km or approximately .09 degree - < .5 degree |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Antarctic Peninsula |
Instrumentation
| Data Collection: | Spatial Coverage: The data cover the Antarctic Peninsula and are in Polar Stereographic projection EPSG:3031. Resolution: The GeoTIFFs have a pixel size of 5 km but the underlying data have a spatial resolution of 15-30 km. |
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Storage
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 187.4 kB |
| Distribution Format | TIFF |
| Fees | N/A |
| Data Storage: | The dataset consists of three GeoTIFFs. |