Data · collection · 2021
Self-potential measurements on the Sorsdal Glacier 2018
Listed in NASA Earthdata CMR
The Self-Potential method is a passive geo-electrical technique, used to delineating, monitoring, and quantifying the flow of water in the near surface layer by exploiting the presence of naturally-occurring electrical potentials in the subsurface.
Description
Pore waters generally have an excess of electrical charge due to the electrical double layer at the interface between the solid matrix (in this case snow grains) and pore water.
The advective drag of this excess of electrical charge is responsible for a streaming current, whose divergence generates a quasistatic electric field which can be measured using non-polarising electrodes. An array of 6 non-polarising self-potential (Petiau) electrodes, connected to a Campbell CR1000 data logger with single core cable, were deployed on the Sørsdal Glacier in 2018. The data consist of a timestamp and a single measurement for each for the six electrodes in mV, a measurement was recorded for each electrode every 60 seconds.
Read the rest (2 more)
The electrodes were located approximately 100 m apart, across the glacier, between the channels leading down glacier from Twin and Channel Lakes. Coordinates (latitude and longitude in decimal degrees) SP data logger - 68.689117 S 78.440383 E SP electrode 1 - 68.690867 S 78.440733 E SP electrode 2 - 68.689987 S 78.440583 E SP electrode 3 - 68.689133 S 78.440517 E SP electrode 4 - 68.68825 S 78.440367 E SP electrode 5 - 68.68735 S 78.4403 E SP electrode 6 - 68.686467 S 78.440217 E Data file format information File type - CSV Timestamp - Decimal Julian day SP electrode 1 - miliVolts SP electrode 2 - miliVolts SP electrode 3 - miliVolts SP electrode 4 - miliVolts SP electrode 5 - miliVolts SP electrode 6 - miliVolts Data duration - 22/01/18 - 07/12/18 (some data gaps due to battery failure mid winter).
Measurement interval - 60 seconds.
Links
Get the data
- Download the dataset. data.aad.gov.au/eds/4930/download ↗
download · from NASA CMR
Where it is published
- DOI doi.org/10.26179/5d26831073364 ↗
DOI / persistent id · from NASA CMR
Documentation and papers
- data.aad.gov.au /aadc/metadata/citation.cfm?entry_id=AAS_4342_SP_SORSDAL_2018 ↗
Citation reference for this metadata record and dataset.
documentation · from NASA CMR
- Public information for AAS project AAS_4342 secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS… ↗
project · from NASA CMR
Catalogue records · 2
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1629806893-AU_AADC.umm_json ↗
metadata API · from NASA CMR
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1629806893-AU_AADC.html ↗
catalogue entry · from NASA CMR
Topics
- Stated by source
- FIELD SURVEYS · Glaciers · PROBES
- Inferred from text
- Geophysics 70%
Provenance · 1 source records, 12 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1629806893-AU_AADC | 8 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[field].anzsrc:group:3706 | enrichment · NASA CMR | taxonomy-embedding@1.1.0 | title+keywords+description (70%) |
| concepts[instrument].gcmd_instrument:probes | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/cryosphere/glaciers-ice-sheets/glaciers | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:field-surveys | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| publication_date | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |