CALM; GTN-P; Wieczorek, Mareike; Heim, Birgit; Bartsch, Annett: GTN-P CALM: 34 years of Active Layer Thickness (ALT) across latitudinal and elevational gradients in the Northern Hemisphere [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.972777 (dataset in review)
Abstract:
The presented data collection relies on Active Layer Thickness (ALT) data collected and managed by the Circumpolar Active Layer Monitoring Network-CALM under the Global Terrestrial Network for Permafrost (GTN‐P) / International Permafrost Association (IPA) as the primary international program for monitoring permafrost Essential Climate Variables (ECV). The CALM observational network observes the long-term response of the active layer and near-surface permafrost to climate change over multi-decadal time scales in the Northern and the Southern hemisphere. The CALM activities and data are hosted on the CALM website http://www.gwu.edu/~calm. This presented data collection contains 263 ALT time series located in the Northern Hemisphere and spans 34 years (1990-2023) of annual (discontinuous) ALT. The ALT time-series cover the Arctic and mountain permafrost in the Swiss Alps and Asia, latitudinal and elevation gradients, making these records unique and providing an important snapshot of the state of permafrost across these complex landscapes. The data provided here has been assembled from the original data sources and optimized by the validation team in the ESA Permafrost_cci project for the validation of the Permafrost_cci Active Layer Thickness time series.
Related to:
Nelson, Frederick E; Shiklomanov, Nikolay I; Nyland, Kelsey E (2021): Cool, CALM, collected: the Circumpolar Active Layer Monitoring program and network. Polar Geography, 44(3), 155-166, https://doi.org/10.1080/1088937X.2021.1988001
Westermann, Sebastian; Barboux, Chloé; Bartsch, Annett; Delaloye, Reynald; Grosse, Guido; Heim, Birgit; Hugelius, Gustaf; Irrgang, Anna Maria; Kääb, Andreas Max; Matthes, Heidrun; Nitze, Ingmar; Pellet, Cécile; Seifert, Frank Martin; Strozzi, Tazio; Wegmüller, Urs; Wieczorek, Mareike; Wiesmann, Andreas (2024): ESA Permafrost Climate Change Initiative (Permafrost_cci): Permafrost active layer thickness for the Northern Hemisphere, v4.0 [dataset]. NERC EDS Centre For Environmental Data Analysis, https://doi.org/10.5285/D34330CE3F604E368C06D76DE1987CE5
Project(s):
CCI Permafrost (ESA_CCI_Permafrost_CCN2)
Coverage:
Median Latitude: 62.748101 * Median Longitude: 146.994497 * South-bound Latitude: 31.816670 * West-bound Longitude: 7.273075 * North-bound Latitude: 81.400720 * East-bound Longitude: -20.552800
Date/Time Start: 1990-01-01T00:00:00 * Date/Time End: 2023-01-01T00:00:00
Minimum Elevation: -1.0 m * Maximum Elevation: 4788.0 m
Event(s):
CALM_C1 (C1, Alexandria Fiord) * Latitude: 78.883330 * Longitude: -75.916670 * Elevation: 0.0 m * Location: Canada * Method/Device: Sampling permafrost (PERM) * Comment: PI: Greg Henry, Method: Spatially-oriented mechanical probing at 100 m Grid or Transect
CALM_C3A (C3 A, North Head) * Latitude: 69.719720 * Longitude: -134.461900 * Elevation: 12.0 m * Location: Canada * Method/Device: Sampling permafrost (PERM) * Comment: PI: Caroline Duchesne, Sharon Smith, Method: Thaw tube measurements
CALM_C3B (C3 B, North Head) * Latitude: 69.719720 * Longitude: -134.461900 * Elevation: 12.0 m * Location: Canada * Method/Device: Sampling permafrost (PERM) * Comment: PI: Caroline Duchesne, Sharon Smith, Method: Spatially-oriented mechanical probing at 100 m Grid or Transect
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Site | Site | Site Code | |||
| 3 | Name | Name | Site Name | |||
| 4 | Identification | ID | GTN-P ID | |||
| 5 | Country | Country | ||||
| 6 | Area/locality | Area | ||||
| 7 | Latitude of event | Latitude | ||||
| 8 | Longitude of event | Longitude | ||||
| 9 | DATE/TIME | Date/Time | Geocode | |||
| 10 | Active layer depth | ALD | cm | Active layer thickness (ALT); maximum thaw depth at the end of the summer | ||
| 11 | Comment | Comment | Comment on data, extracted from CALM website | |||
| 12 | Latitude 2 | Latitude 2 | Latitude used for ESA CCI Permafrost validation | |||
| 13 | Longitude 2 | Longitude 2 | Latitude used for ESA CCI Permafrost validation | |||
| 14 | Comment | Comment | ESA CCI Permafrost validation comment |
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:
22777 data points
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