Geodesy for Essential Climate Variable products associated with Permafrost ...

• Main Author: Liu, Lin
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Active layer thickness; permafrost
• Online Access: https://dx.doi.org/10.57757/iugg23-1340; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017255

<!--!introduction!--> Permafrost has long been listed as a terrestrial Essential Climate Variable (ECV) by the Global Climate Observing System (GSOS). According to the GSOS ECVs guidelines and requirements as released in 2022, three ECV products are associated with permafrost, including permafrost temperature, active layer thickness, and rock glacier velocity. Since permafrost is purely defined by the subsurface temperature, many of its changes occurring underground are mainly observed by borehole measurements but with limited spatial coverage. This paper reviews the applications and potential of geodetic methods to generate ECV products of active layer thickness and rock glacier velocity. Leveling, InSAR, and GNSS Interferometric Reflectometry measure seasonal, cyclic thaw subsidence and frost heave. A few retrieval algorithms have been developed to take the geodetic measurements of elevation changes as the input to indirectly estimate active layer thickness and have achieved moderate success in a few ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...