Publication Date:
2024-04-11
Description:
ESA DUE Globpermafrost (2016-2018) and the ESA CCI+ Permafrost (2018-2021) focus on the processing of ready-to-use data products derived from remote sensing data that support permafrost-related research. Within the first funding period a wide range of GlobPermafrost remote sensing products were processed: Landsat multispectral index trends (Tasseled Cap Brightness, Greeness, Wetness; Normalized Vegetation Index NDVI), Arctic land cover (e.g., shrub height, vegetation composition), lake ice grounding, InSAR-based land surface deformation, rock glacier velocities. Additionally, spatially distributed permafrost model output with permafrost probability and ground temperature per pixel were developed. The focus on ESA DUE projects is to ensure that all data products processed meet user requirements. To make products visible we established WebGIS projects using WebGIS technology within maps@awi (http://maps.awi.de), a highly scalable data visualisation unit within AWI’s data workflow framework O2A (from Observation to Archive). GIS services have been created and designed using ArcGIS for Desktop (latest Version) and finally published as a Web Map Service (WMS), an internationally standardized format (Open Geospatial Consortium (OGC)), using ArcGIS for Server. The project-specific data WMS as well as a resolution-specific background map WMS are embedded into a GIS viewer application based on Leaflet, an open-source JavaScript library. Therefore, we developed project-specific visualisation of raster and vector data products adapted to the products’ specific spatial scales and resolutions. This resulted in an ‘Arctic’ WebGIS visualising circum-artic products, as well as small-scale regional WebGIS projects like ‘Alps’, ‘Andes’ or ‘Central Asia’ that visualize e.g. higher spatial resolution products like rock glacier movements. The GIS viewer application was adapted to interlink all GlobPermafrost WebGIS projects, and especially to enable their direct accessibility via the GlobPermafrost Overview WebGIS.
Beside remote sensing derived data products, the locations of the WMO GCOS ground-monitoring networks of the permafrost community, the Global Terrestrial Network for Permafrost GTN-P managed by the International Permafrost Association IPA were add as feature layer. All resulting ESA GlobPermafrost WebGIS presented on several User workshops and at conferences, were being continuously adapted in close interaction with the International Permafrost Association IPA. The GlobPermafrost data products are already DOI-registered and archived in the data archive PANGAEA provided by AWI.
Whithin the framework of the ESA CCI+ Permafrost project a newly WebGIS was added: a time-series webGIS comprising of the CCI+ Permafrost circum-arctic model output for Mean Annual Ground Temperature (MAGT), Permafrost Extentand Probability (PEX), and Active Layer Thickness (ALT), for a more than twenty years period of time. All data products are available in a yearly resolution, as well as calculated averages of MAGT, PEX and ALT of the time series. Fortunately, the new time-series WebGIS built on the already established time-series visualization capabilities developed in-house within the technical WebGIS-infrastructure maps@awi at AWI.
Repository Name:
EPIC Alfred Wegener Institut
Type:
Conference
,
NonPeerReviewed
Format:
application/pdf
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