From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes
Although a subsurface phenomenon, permafrost creates distinct features on the land surface which can be observed using remote sensing data. This is especially true for the East Siberian Arctic where ice-rich permafrost is abundant in the geological subsurface and only protected by a thin layer of or...
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ftawi:oai:epic.awi.de:47609 2024-09-15T18:11:25+00:00 From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes Günther, Frank Grosse, Guido Nitze, Ingmar Overduin, Paul 2015 https://epic.awi.de/id/eprint/47609/ https://resa.planet.com/page/7-resa-workshop-2015 https://hdl.handle.net/10013/epic.5dbac522-665f-474c-b32a-19b8da5aa887 unknown Günther, F. orcid:0000-0001-8298-8937 , Grosse, G. , Nitze, I. orcid:0000-0002-1165-6852 and Overduin, P. orcid:0000-0001-9849-4712 (2015) From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes , 7th RESA (RapidEye Science Archive) Workshop 2015, DLR, Bonn, 29 April 2015 - 30 April 2015 . hdl:10013/epic.5dbac522-665f-474c-b32a-19b8da5aa887 EPIC37th RESA (RapidEye Science Archive) Workshop 2015, DLR, Bonn, 2015-04-29-2015-04-30 Conference notRev 2015 ftawi 2024-06-24T04:19:47Z Although a subsurface phenomenon, permafrost creates distinct features on the land surface which can be observed using remote sensing data. This is especially true for the East Siberian Arctic where ice-rich permafrost is abundant in the geological subsurface and only protected by a thin layer of organic soils. In the Lena River Delta, deeper seasonal thaw during increasingly frequent warm summers does not only result in irreversible loss of ground ice and subsequent land subsidence, but also in discharge of soil organic carbon that was previously fixed in permafrost. To characterize the dynamics of thawing permafrost and its impacts on landscapes, hydrology, and emission of methane and carbon dioxide we analyse optical remote sensing time series from various sensors. Local field measurements (meteorology, ground temperature, geodetic surveys) during several recent Russian-German Arctic expeditions complement our remote sensing studies and help differentiating factors causing relief and land cover changes. While previous studies concentrated on general inventory of thermokarst landforms, higher temporal resolution of contemporary image acquisitions provides unique information for the understanding of seasonal processes, such as ice-on and ice-off on thermokarst lakes, shore erosion on delta channels, water level changes and drainage events in lakes, and wettening/drying of thermokarst-affected areas. Ground truth data provides the basis for calibration and correction of 20 RapidEye scenes (level 1B) from 2014 using a bundle block adjustment procedure. Next steps will include extraction of seasonal variations of band metrics such as NDVI which we will compare to decadal Landsat time series of landcover change and multitemporal, photogrammetrically-derived digital elevation models in order to identify signatures and trends typical for permafrost thaw related processes on the surface. Our approach will allow assessment of rates and short-term changes in thermokarst dynamics and landscape evolution. In addition, the ... Conference Object Ice lena river permafrost Thermokarst Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Although a subsurface phenomenon, permafrost creates distinct features on the land surface which can be observed using remote sensing data. This is especially true for the East Siberian Arctic where ice-rich permafrost is abundant in the geological subsurface and only protected by a thin layer of organic soils. In the Lena River Delta, deeper seasonal thaw during increasingly frequent warm summers does not only result in irreversible loss of ground ice and subsequent land subsidence, but also in discharge of soil organic carbon that was previously fixed in permafrost. To characterize the dynamics of thawing permafrost and its impacts on landscapes, hydrology, and emission of methane and carbon dioxide we analyse optical remote sensing time series from various sensors. Local field measurements (meteorology, ground temperature, geodetic surveys) during several recent Russian-German Arctic expeditions complement our remote sensing studies and help differentiating factors causing relief and land cover changes. While previous studies concentrated on general inventory of thermokarst landforms, higher temporal resolution of contemporary image acquisitions provides unique information for the understanding of seasonal processes, such as ice-on and ice-off on thermokarst lakes, shore erosion on delta channels, water level changes and drainage events in lakes, and wettening/drying of thermokarst-affected areas. Ground truth data provides the basis for calibration and correction of 20 RapidEye scenes (level 1B) from 2014 using a bundle block adjustment procedure. Next steps will include extraction of seasonal variations of band metrics such as NDVI which we will compare to decadal Landsat time series of landcover change and multitemporal, photogrammetrically-derived digital elevation models in order to identify signatures and trends typical for permafrost thaw related processes on the surface. Our approach will allow assessment of rates and short-term changes in thermokarst dynamics and landscape evolution. In addition, the ... |
format |
Conference Object |
author |
Günther, Frank Grosse, Guido Nitze, Ingmar Overduin, Paul |
spellingShingle |
Günther, Frank Grosse, Guido Nitze, Ingmar Overduin, Paul From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes |
author_facet |
Günther, Frank Grosse, Guido Nitze, Ingmar Overduin, Paul |
author_sort |
Günther, Frank |
title |
From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes |
title_short |
From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes |
title_full |
From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes |
title_fullStr |
From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes |
title_full_unstemmed |
From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes |
title_sort |
from multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in siberian permafrost landscapes |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/47609/ https://resa.planet.com/page/7-resa-workshop-2015 https://hdl.handle.net/10013/epic.5dbac522-665f-474c-b32a-19b8da5aa887 |
genre |
Ice lena river permafrost Thermokarst |
genre_facet |
Ice lena river permafrost Thermokarst |
op_source |
EPIC37th RESA (RapidEye Science Archive) Workshop 2015, DLR, Bonn, 2015-04-29-2015-04-30 |
op_relation |
Günther, F. orcid:0000-0001-8298-8937 , Grosse, G. , Nitze, I. orcid:0000-0002-1165-6852 and Overduin, P. orcid:0000-0001-9849-4712 (2015) From multidecadal to interannual and seasonal remote sensing of thermokarst dynamics in Siberian permafrost landscapes , 7th RESA (RapidEye Science Archive) Workshop 2015, DLR, Bonn, 29 April 2015 - 30 April 2015 . hdl:10013/epic.5dbac522-665f-474c-b32a-19b8da5aa887 |
_version_ |
1810449018712489984 |