Date (Creation)

2021-07-14

Date (Revision)

2021-07-14

Date (Publication)

2021-07-14

Date (released)

2021-07-14

Edition

2.0

Unique resource identifier

https://doi.org/10.5285/fbee7b3d-bf85-452a-b8c4-a83dce4e14ce

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01524

Codespace

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

Unique resource identifier

NE/P00265X/1

Codespace

award

Unique resource identifier

NE/P002021/1

Codespace

award

Other citation details

Please cite this item as: Hubbard, B., Miles, K., Doyle, S., Quincey, D., & Miles, E. (2021). Ice tilt time-series from sensors installed in boreholes drilled into Khumbu Glacier, Nepal, in 2017 and 2018 as part of EverDrill research project - VERSION 2.0 (Version 2.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/fbee7b3d-bf85-452a-b8c4-a83dce4e14ce

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Aberystwyth University	Hubbard, Bryn		Author
Aberystwyth University	Miles, Katie		Author
Aberystwyth University	Doyle, Samuel		Author
University of Leeds	Quincey, Duncan		Author
University of Leeds	Miles, Evan		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 Motion/Ice Sheet Motion
• EARTH SCIENCE > Cryosphere > Glaciers/Ice Sheets > Glaciers
• EARTH SCIENCE > Cryosphere > Snow/Ice > Ice Motion

Theme

• Ice boreholes

• Ice deformation

• Khumbu Glacier, Nepal

Place

• Khumbu Glacier, Himalaya Nepal

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

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere
• Environment

Begin date

2017-05-17

End date

2019-10-20

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 datasets are ice deformation time series recorded by accelerometers mounted on strings installed into three boreholes drilled into Khumbu Glacier, Nepal. For borehole information, see the related datasets.

Data collection:

Borehole tilt and ice deformation sensors installed in 2017 were three-axis analog micromechanical system accelerometers (model MMA7361), controlled by Campbell Scientific CR1000 data loggers from the glacier surface. The sensors were installed so that the z axis recorded approximately 1 g when hanging vertically in the borehole.

The digital sensors installed in 2018 are three-axis accelerometer/three-axes gyroscopes (model MPU6050), and also contain thermistors to measure temperature (model DS18B20), all controlled by a RS-485 data logger. Roll and pitch read values of 0 when the sensor is perfectly vertical hanging in the borehole.

Resolution: The accelerometers installed in 2017 have an accuracy of 800 mV g-1 stated by the manufacturer (where g is the normalised gravity vector). A further calibration was carried out (details in Doyle et al. (2018)), resulting in the absolute accuracy of the tilt sensors being determined to be less than +/- 1 degree.

The digital sensors installed in 2018 also measured temperature, however, these were not calibrated and are therefore only accurate to +/- 0.5 degrees Celsius.

Data quality:

Detailed methodology, including accuracy estimation, is presented in the referenced publication.

Resolution:

The accelerometers installed in 2017 have an accuracy of 800 mV g-1 stated by the manufacturer (where g is the normalised gravity vector). A further calibration was carried out (details in Doyle et al. (2018)), resulting in the absolute accuracy of the tilt sensors being determined to be less than ± 1 degree.

The digital sensors installed in 2018 also measured temperature, however, these were not calibrated and are therefore only accurate to ± 0.5 degrees Celsius.

Metadata

File identifier

fbee7b3d-bf85-452a-b8c4-a83dce4e14ce XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2021-07-14

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