Date (Creation)

2022-01-27

Date (Revision)

2022-01-27

Date (Publication)

2022-01-27

Date (released)

2022-01-27

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/d4dedc2d-1f7f-45c8-8b04-41b8b099cef9

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01603

Codespace

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

Unique resource identifier

NE/L002574/1

Codespace

award

Unique resource identifier

NE/S013318/1

Codespace

award

Other citation details

Please cite this item as: Taylor, L., Quincey, D., Smith, M., Potter, E., Castro, J., & Fyffe, C. (2022). Glacier boundaries (1975-2020) and elevation change (2000-2020) of the Peruvian Cordilleras Vilcanota, Vilcabamba, and Urubamba (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/d4dedc2d-1f7f-45c8-8b04-41b8b099cef9

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
University of Leeds	Taylor, Liam		Author
University of Leeds	Quincey, Duncan		Author
University of Leeds	Smith, Mark		Author
University of Leeds	Potter, Emily		Author
Universidad Nacional de San Antonio Abad del Cusco	Castro, Joshua		Author
Northumbria University	Fyffe, Catriona		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 > Glaciers/Ice Sheets > Glacier Elevation/Ice Sheet Elevation
• EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Mass Balance/Ice Sheet Mass Balance
• EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glacier Thickness/Ice Sheet Thickness
• EARTH SCIENCE > Cryosphere > Snow/Ice > Ice Extent

Theme

• ASTER

• Landsat

• Peru

• mass balance

• tropical glaciers

Place

• Cordilleras Vilcanota, Vilcabamba, and Urubamba, Cusco Region Peru

GEMET - INSPIRE themes, version 1.0

• Elevation
• Meteorological 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

Larger work citation

Unique resource identifier

doi

Codespace

doi

Association Type

Cross reference

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Elevation
• Geoscientific information
• Imagery base maps earth cover

Begin date

1975-01-01

End date

2020-12-31

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:

Glacier Boundaries

Landsat-2 scenes were used to manually delineate glacier outlines for the 1970s. All other glacier outlines were produced from full-archive Landsat-5 (1984 - 2012) and Landsat-8 (2013 - 2020) imagery using a Normalised Difference Snow / Water Index (NDSI, NDWI) in Google Earth Engine. A cloud-free composite was produced for each year by extracting the median pixel value from the driest months (August to December) to minimise snow and cloud cover. Due to heavy cloud in these regions, there are some years within the time series with no usable imagery.

Elevation Change

All L1A ASTER tiles collected over these regions in the 20-year timespan from 1st January 2000 to 31st December 2020 were used to derive DEMs and co-registered to off-ice areas using the method of Nuth and Kääb (2011). DEMs were clipped to the range of elevation of the cordilleras, ± 100m of the median to remove erroneous values. A single value per pixel per year was extracted from all DEM tiles by collecting the median value. Using these single values per year, a linear fit through the surface elevation was then calculated over three time periods: 2000 - 2010; 2010 - 2020; and 2000 - 2020 to represent elevation change per year during these intervals.

Data collection:

ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) L1A (AST_L1A)

Landsat-2 MSS L1TP

Landsat-5 TM Collection 1 Tier 1 TOA Reflectance (Google Earth Engine)

Landsat-8 Level 2 Collection 2 Tier 1 (Google Earth Engine)

Data quality:

All 1984 - 2020 glacier boundaries have an accuracy of 5%, with the 1975 Landsat-2 scenes at 11% owing to larger pixel sizes in the original dataset Volume change error is calculated as a median of off-ice areas within a 2 km buffer of glaciers and this error carried forward to calculate mass (following Brun et al. 2017) and mass balance.

Metadata

File identifier

d4dedc2d-1f7f-45c8-8b04-41b8b099cef9 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2022-01-27

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