Full Record - Sentinel2 satellite imagery and derived geographic locations of emperor penguin colonies in the central and eastern Bellingshausen Sea between October and December, 2022

Sentinel2 satellite imagery and derived geographic locations of emperor penguin colonies in the central and eastern Bellingshausen Sea between October and December, 2022

GB/NERC/BAS/PDC/01756

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.

Citation:
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 Data

License

Access:	No restrictions apply.
Use:	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

Authors

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

Basic Information

Creation Date:	2023-07-05
Dataset Progress:	Complete
Dataset Language:	English
ISO Topic Categories:	Biota
Parameters:	Oceans > Marine Biology > Marine Birds

Additional Information

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
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.
Lineage/Methodology:	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.

Extent

Temporal Coverage:
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

Discovery Metadata System