Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation
The intensity of thermo-erosion in the coastal zone of the Laptev Sea region mirrors the strong seasonality of exogenous hydro-meteorological conditions, mainly the presence or absence of sea ice and large temperature amplitudes. Permafrost, and in particular the widespread presence of syngenetic gr...
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University of Lisbon and the University of Évora
2014
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ftawi:oai:epic.awi.de:35889 2024-09-15T18:11:39+00:00 Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation Günther, Frank Overduin, Paul Grigoriev, Mikhail N. Grosse, Guido Baranskaya, Alisa Opel, Thomas 2014-06-21 https://epic.awi.de/id/eprint/35889/ https://hdl.handle.net/10013/epic.43800 unknown University of Lisbon and the University of Évora Günther, F. orcid:0000-0001-8298-8937 , Overduin, P. orcid:0000-0001-9849-4712 , Grigoriev, M. N. , Grosse, G. orcid:0000-0001-5895-2141 , Baranskaya, A. and Opel, T. orcid:0000-0003-1315-8256 (2014) Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation , 4th European Conference on Permafrost, Évora, Portugal, 18 June 2014 - 21 June 2014 . hdl:10013/epic.43800 EPIC34th European Conference on Permafrost, Évora, Portugal, 2014-06-18-2014-06-21University of Lisbon and the University of Évora Conference notRev 2014 ftawi 2024-06-24T04:09:53Z The intensity of thermo-erosion in the coastal zone of the Laptev Sea region mirrors the strong seasonality of exogenous hydro-meteorological conditions, mainly the presence or absence of sea ice and large temperature amplitudes. Permafrost, and in particular the widespread presence of syngenetic ground ice, both above and below sea level, constitute endogenous local conditions that make this coastline highly susceptible to currently observed warming and the associated extension of the open water season on the East Siberian arctic shelf. Although the general magnitude of erosion dynamics along Ice Complex coasts has been investigated, substantial information about local, regional, seasonal, and inter-annual variations still remain unknown. Monitoring capabilities could be increased by using the large areal coverage of historical records, accompanied by new acquisitions of contemporary high and very high resolution remote sensing data. Based on topographic reference measurements during field campaigns, we derived digital elevation models for subsequent orthorectification, in order to enable consistent distance and area measurements. A distinction was made between two related processes that work together, but with temporal and quantitative differences. Cliff top erosion (thermo-denudation) and cliff bottom erosion (thermo-abrasion) have different impacts on the volume of land loss and subsequent mass displacements. For a geographically broad baseline of well-distributed key areas, a proportional relationship of both processes on a multi-decadal long-term scale was observed, at site-specific average rates of -1.8 to -3.4 m/yr on Muostakh Island off the coast of Tiksi and along the continental coast of the Dmitriy Laptev Strait, respectively. However, short-term observations over the recent past revealed not only that erosion rates were 1.6 times more rapid on average, but also responded differently in terms of thermo-denudation and abrasion towards environmental forcings. This response was evaluated using the ... Conference Object Ice laptev Laptev Sea permafrost Sea ice Tiksi Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The intensity of thermo-erosion in the coastal zone of the Laptev Sea region mirrors the strong seasonality of exogenous hydro-meteorological conditions, mainly the presence or absence of sea ice and large temperature amplitudes. Permafrost, and in particular the widespread presence of syngenetic ground ice, both above and below sea level, constitute endogenous local conditions that make this coastline highly susceptible to currently observed warming and the associated extension of the open water season on the East Siberian arctic shelf. Although the general magnitude of erosion dynamics along Ice Complex coasts has been investigated, substantial information about local, regional, seasonal, and inter-annual variations still remain unknown. Monitoring capabilities could be increased by using the large areal coverage of historical records, accompanied by new acquisitions of contemporary high and very high resolution remote sensing data. Based on topographic reference measurements during field campaigns, we derived digital elevation models for subsequent orthorectification, in order to enable consistent distance and area measurements. A distinction was made between two related processes that work together, but with temporal and quantitative differences. Cliff top erosion (thermo-denudation) and cliff bottom erosion (thermo-abrasion) have different impacts on the volume of land loss and subsequent mass displacements. For a geographically broad baseline of well-distributed key areas, a proportional relationship of both processes on a multi-decadal long-term scale was observed, at site-specific average rates of -1.8 to -3.4 m/yr on Muostakh Island off the coast of Tiksi and along the continental coast of the Dmitriy Laptev Strait, respectively. However, short-term observations over the recent past revealed not only that erosion rates were 1.6 times more rapid on average, but also responded differently in terms of thermo-denudation and abrasion towards environmental forcings. This response was evaluated using the ... |
format |
Conference Object |
author |
Günther, Frank Overduin, Paul Grigoriev, Mikhail N. Grosse, Guido Baranskaya, Alisa Opel, Thomas |
spellingShingle |
Günther, Frank Overduin, Paul Grigoriev, Mikhail N. Grosse, Guido Baranskaya, Alisa Opel, Thomas Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation |
author_facet |
Günther, Frank Overduin, Paul Grigoriev, Mikhail N. Grosse, Guido Baranskaya, Alisa Opel, Thomas |
author_sort |
Günther, Frank |
title |
Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation |
title_short |
Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation |
title_full |
Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation |
title_fullStr |
Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation |
title_full_unstemmed |
Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation |
title_sort |
accelerated coastal thermo-erosion activity in the laptev sea and its spatiotemporal differentiation |
publisher |
University of Lisbon and the University of Évora |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35889/ https://hdl.handle.net/10013/epic.43800 |
genre |
Ice laptev Laptev Sea permafrost Sea ice Tiksi |
genre_facet |
Ice laptev Laptev Sea permafrost Sea ice Tiksi |
op_source |
EPIC34th European Conference on Permafrost, Évora, Portugal, 2014-06-18-2014-06-21University of Lisbon and the University of Évora |
op_relation |
Günther, F. orcid:0000-0001-8298-8937 , Overduin, P. orcid:0000-0001-9849-4712 , Grigoriev, M. N. , Grosse, G. orcid:0000-0001-5895-2141 , Baranskaya, A. and Opel, T. orcid:0000-0003-1315-8256 (2014) Accelerated coastal thermo-erosion activity in the Laptev Sea and its spatiotemporal differentiation , 4th European Conference on Permafrost, Évora, Portugal, 18 June 2014 - 21 June 2014 . hdl:10013/epic.43800 |
_version_ |
1810449229380845568 |