Abstract:
This dataset comprises Sentinel2 satellite imagery and derived geographic locations of five emperor penguin colonies located in the central and eastern Bellingshausen Sea, between October to December 2022. Medium-resolution satellite data was monitored for the presence of emperor penguin colonies, and when colonies were found, imagery was digitised and downloaded from Copernicus playground. Satellite data indicate early sea ice break-up at three of the four colonies, and the disappearance of the fourth colony.
Digitisation and annotation of satellite imagery was carried out by the British Antarctic Survey, and supported by NERC core funding and WWF grant NEB 2181.
Keywords:
Emperor penguin, breeding success, climate change, fast ice, sea ice
Fretwell, P. (2023). Sentinel2 satellite imagery and derived geographic locations of emperor penguin colonies in the central and eastern Bellingshausen Sea between October and December, 2022 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/a777e89c-ffcc-4ff4-981c-8f37e5ca84c2
| Access Constraints: | No restrictions apply. |
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| Use Constraints: | Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/. Satellite data should be credited to Modified Copernicus Sentinel data [2022]/Sentinel Hub |
| Creation Date: | 2023-07-05 |
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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 Polar Data Centre |
| Role(s) | Metadata Author |
| Organisation | British Antarctic Survey |
| Name | Dr Peter T Fretwell |
| Role(s) | Investigator, Technical Contact |
| Organisation | British Antarctic Survey |
| Parent Dataset: | N/A |
| Reference: | Fretwell, Boutet, Ratcliffe 2023, Nature Comms Earth and Environment, in press. Gerrish, L., Ireland, L., Fretwell, P., & Cooper, P. (2023). High resolution vector polygons of the Antarctic coastline (7.7) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/0be5339c-9d35-44c9-a10f-da4b5356840b Gerrish, L., Ireland, L., Fretwell, P., & Cooper, P. (2023). High resolution vector polylines of the Antarctic coastline (7.7) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/70ac5759-34ee-4f39-9069-2116db592340 |
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| Quality: | Quality of the count data should be regarded as approximate as the methodology of counting numbers of birds from VHR imagery is unproven and although counters get agreement within 5-20 percentage any bias to as yet untested. See related paper. The following jpeg's imagery is only partially loaded. This has not affected the quality of the dataset and associated locations of emperor penguin colonies. |
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| Lineage: | Colony locations have been found by medium resolution satellite from over the last ten years. Selected sentinel2 satellite data was visualized and downloaded from Copernicus Sentinel playground as jpeg files. Selection was based on cloud cover and time of year (between October and late December 2022). The shapefiles of colony locations were made by firstly locating colonies within the jpeg digitised imagery, and subsequently retrieving their geographic coordinates by using Antarctic coastline data from the Antarctic Digital Database and freely available satellite mosaics from ESRI WORLD IMAGERY. No populations or size estimates were made from this imagery. |
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| Temporal Coverage: | |
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| Start Date | 2022-10-01 |
| End Date | 2022-12-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -73.24911 |
| Northernmost | -69.52092 |
| Longitude | |
| Westernmost | -89.90583 |
| Easternmost | -72.22934 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | 10m |
| Longitude Resolution | 10m |
| Horizontal Resolution Range | N/A |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Bellinghausen Sea |
| Location | Antarctica |
| Detailed Location | Rothschild Island |
| Location | Antarctica |
| Detailed Location | Verdi Inlet |
| Location | Antarctica |
| Detailed Location | Smyley Island |
| Location | Antarctica |
| Detailed Location | Bryant Coast |
| Location | Antarctica |
| Detailed Location | Pfogner Point |
| Data Collection: | Copernicus Sentinel2 visualized using Sentinel Playground ArcGIS desktop 10.6 (ESRI 2023) |
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| Data Storage: | 1 shp and jpeg |
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