Poizat, Marine; Alkalla, Jeanne; Picard, Ghislain; Arnaud, Laurent; Lefebvre, Eric; Narteau, Clément: Morphometric parameters and migration rate of snow barchans at Concordia Station, Antarctica (summers 2017 to 2022) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.990221 (dataset in review), In: Poizat, M et al.: Morphodynamics of snow barchans at Concordia Station, Antarctica between 2017 and 2022 using near infra-red camera [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.990219 (dataset in review)
Abstract:
This dataset contains measurements of migration rates, orientations, and morphometric parameters of snow barchan dunes located approximately 800 m from Concordia Station, East Antarctica. The measurements were performed on orthorectified near-infrared time-lapse images acquired between 2017 and 2022. Image acquisition was limited to periods with sufficient daylight, typically between August and March of each year. The effective monitored surface area with adequate spatial resolution to clearly distinguish dune features is approximately 5200 m². The dataset includes the event name (Combined), migration rate of individual barchans (speed(m/h) [m h⁻¹], migration orientation measured counterclockwise from geographic north (orientation_migration), dune crest orientation using the same angular convention (orientation), total dune length (Ltot) [m], total dune width perpendicular to the main axis (width_perp) [m], right horn length (Lh1) [m], left horn length (Lh2) [m], and the acquisition date and time of the image used for measurement (UTC). Migration rates were derived from sequential image analysis. The observations were collected as part of a long-term study of snow surface evolution aimed at quantifying the role of snow in Antarctica climate. The primary purpose of this dataset is to provide standardized quantitative descriptors of snow barchan migration and geometry for use in studies of surface processes, wind-driven sediment transport, and landscape evolution in polar environments. Data were generated through systematic image processing and morphometric extraction applied to time-series near-infrared imagery collected at the study site.
Related to:
Poizat, Marine; et al. (submitted): Morphodynamics of snow barchans at Concordia Station, Antarctica.
Funding:
Institut Polaire Français Paul Émile Victor (IPEV), grant/award no. NIVO-1110: Snow properties evolution in a changing climate in Antarctica
Coverage:
Latitude: -75.097700 * Longitude: 123.298200
Date/Time Start: 2017-01-28T01:00:00 * Date/Time End: 2022-12-11T10:00:00
Minimum Elevation: 3233.0 m * Maximum Elevation: 3233.0 m
Event(s):
Concordia_barchan * Latitude: -75.097700 * Longitude: 123.298200 * Elevation: 3233.0 m * Location: Dome C * Method/Device: Camera (CAME)
Comment:
This dataset has been carefully reviewed and curated in accordance with PANGAEA's exceptionally high quality standards. However, due to discontinued communication from the authors' side, it did not receive the usual formal approval by the authors and therefore lacks final scientific validation.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Identification | ID | Poizat, Marine | Event Combined | ||
| 2 | Snow barchan, migration speed | Snow barchan mig speed | m/h | Poizat, Marine | ||
| 3 | Snow barchan, orientation migration | Snow barchan orientation mig | deg | Poizat, Marine | measured counterclokwise from North | |
| 4 | Snow barchan, orientation | Snow barchan orientation | deg | Poizat, Marine | measured counterclokwise from North | |
| 5 | Snow barchan, length | Snow barchan l | m | Poizat, Marine | total | |
| 6 | Snow barchan, width | Snow barchan w | m | Poizat, Marine | total | |
| 7 | Snow barchan, first horn length | Snow barchan Lh1 | m | Poizat, Marine | ||
| 8 | Snow barchan, second horn length | Snow barchan Lh2 | m | Poizat, Marine | ||
| 9 | DATE/TIME | Date/Time | Poizat, Marine | Geocode |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
7069 data points
Download Data (login required; moratorium until 2026-11-01)
View dataset as HTML (shows only first 2000 rows)