Date (Creation)

2025-04-15

Date (Revision)

2025-04-15

Date (Publication)

2025-04-15

Date (released)

2025-04-15

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/17eeb01b-179e-4285-8619-734f390452ac

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/02046

Codespace

https://data.bas.ac.uk/

Unique resource identifier

NE/V011693/1

Codespace

award

Other citation details

Please cite this item as: Hwang, B., & Basu, R. (2025). Floe-scale Fragmentation of Arctic Sea Ice 2013-2014 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/17eeb01b-179e-4285-8619-734f390452ac

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Huddersfield	Hwang, Byongjun		Author
University of Huddersfield	Basu, Rajlaxmi		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Cryosphere > Sea Ice > Ice Extent
• EARTH SCIENCE > Cryosphere > Sea Ice > Ice Floes
• EARTH SCIENCE > Oceans > Sea Ice > Ice Extent
• EARTH SCIENCE > Oceans > Sea Ice > Ice Floes

Theme

• Arctic

• cracks

• floe-scale

• fragmentation

• leads

• melt

• melt ponds

• sea ice

• spring breakup

Place

• Beaufort Sea, Arctic Ocean Arctic

GEMET - INSPIRE themes, version 1.0

• Oceanographic geographical features

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

Data supplied under Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

No restrictions apply.

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

dependency

Unique resource identifier

url

Codespace

url

Association Type

dependency

Unique resource identifier

url

Codespace

url

Association Type

Larger work citation

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Imagery base maps earth cover
• Inland waters
• Oceans

Begin date

2013-06-01

End date

2014-08-14

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

The floe-scale fragmentation data were derived from high-resolution satellite imagery provided by the USGS Global Fiducials Library (GFL). The original images were cropped to the individual floe scale so that each floe could be clearly identified. These GFL images were acquired by tracking drifting buoys, allowing us to identify the same floe across a sequence of images. In this way, we could observe the floe before and after the fragmentation event. Identifying the same floe was done manually by searching through the images based on floe and melt pond patterns.

Once the floe-scale images were created, we used OpenCV drawing tool in CVAT AI (www.cvat.ai) to delineate the boundaries of the floes. The results were exported as segmentation masks, which were analysed by a MATLAB code to calculate floe parameters including the size, area, perimeter, shape factor and circularity of the floes.

The data are organised according to the buoys that the images were tracking - IABP123530, MIZ Cluster 3, MIZ Cluster 4, and MIZ Cluster 2.

IABP123530 is the buoy ID used in the USGS GFL data portal. This corresponds to IABP Buoy ID 300025010123530 on the IABP website. This buoy is co-located with CRREL IMB ID 2012L.

MIZ Cluster 3 is the second northernmost cluster of drifting buoys deployed during the ONR MIZ program. The co-located buoys are WHOI ITP (ID: ITP78), AWS 3, and IMB 4 (see ONR MIZ website).

MIZ Cluster 4 is the northernmost cluster of drifting buoys deployed during the ONR MIZ program. The co-located buoys are WHOI ITP (ID: ITP79), AWS 4, and IMB 9 (see ONR MIZ website).

MIZ Cluster 2 is the second southernmost cluster of drifting buoys deployed during the ONR MIZ program. The co-located buoys are WHOI ITP (ID: ITP77), AWS 2, and IMB 17 (see ONR MIZ website).

The spatial coverage of the dataset covers the Beaufort Sea. Latitude and longitude coordinates for each floe are provided in CSV files in the floe_parameter folder.

Data collection:

Characteristics of satellite imagery data used to derive the FSD data are described below.

USGS GGFL: 1-m resolution visible (panchromatic) satellite imagery from the USGS Global Fiducials Library (GFL) (www.glf.usgs.gov), declassified by the MEDEA group.

Data quality:

The data quality was checked by manually inspecting each image. It should be noted that some of the fragments in the post-fragmentation images could not be identified. Some were too small, while others were difficult to distinguish based on floe and melt pond patterns. The delineation of the floe boundaries was performed using the OpenCV tool (CVAT AI). The delineation was relatively accurate for large floes, but the accuracy decreased for smaller floes.

Metadata

File identifier

17eeb01b-179e-4285-8619-734f390452ac XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2025-04-15

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact