An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges
Present-day climate-change-related ice-melting induces elastic glacial isostatic adjustment (GIA) effects, while paleo-GIA effects describe the ongoing viscous response to the melting of late-Pleistocene ice sheets. The unloading initiated an uplift of the crust close to the centers of former ice sh...
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ftdtupubl:oai:pure.atira.dk:publications/37fac6b8-15d5-4986-aefb-7f7bda0cee67 2024-04-28T08:18:38+00:00 An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges Idžanović, Martina Gerlach, Christian Breili, Kristian Andersen, Ole Baltazar 2019 application/pdf https://orbit.dtu.dk/en/publications/37fac6b8-15d5-4986-aefb-7f7bda0cee67 https://doi.org/10.3390/rs11070744 https://backend.orbit.dtu.dk/ws/files/174287997/remotesensing_11_00744.pdf eng eng https://orbit.dtu.dk/en/publications/37fac6b8-15d5-4986-aefb-7f7bda0cee67 info:eu-repo/semantics/openAccess Idžanović , M , Gerlach , C , Breili , K & Andersen , O B 2019 , ' An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges ' , Remote Sensing , vol. 11 , no. 7 , 744 . https://doi.org/10.3390/rs11070744 CryoSat-2 Land-uplift model Norwegian coast Tide gauges Vertical land motion /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2019 ftdtupubl https://doi.org/10.3390/rs11070744 2024-04-03T15:40:44Z Present-day climate-change-related ice-melting induces elastic glacial isostatic adjustment (GIA) effects, while paleo-GIA effects describe the ongoing viscous response to the melting of late-Pleistocene ice sheets. The unloading initiated an uplift of the crust close to the centers of former ice sheets. Today, vertical land motion (VLM) rates in Fennoscandia reach values up to around 10 mm/year and are dominated by GIA. Uplift signals from GIA can be computed by solving the sea-level equation (SLE), S˙ = N˙ − U˙ . All three quantities can also be determined from geodetic observations: relative sea-level variations ( S˙ ) are observed by means of tide gauges, while rates of absolute sea-level change ( N˙ ) can be observed by satellite altimetry; rates of VLM ( U˙ ) can be determined by GPS (Global Positioning System). Based on the SLE, U˙ can be derived by combining sea-surface measurements from satellite altimetry and relative sea-level records from tide gauges. In the present study, we have combined 7.5 years of CryoSat-2 satellite altimetry and tide-gauge data to estimate linear VLM rates at 20 tide gauges along the Norwegian coast. Thereby, we made use of monthly averaged tide-gauge data from PSMSL (Permanent Service for Mean Sea Level) and a high-frequency tide-gauge data set with 10-min sampling rate from NMA (Norwegian Mapping Authority). To validate our VLM estimates, we have compared them with the independent semi-empirical land-uplift model NKG2016LU_abs for the Nordic-Baltic region, which is based on GPS, levelling, and geodynamical modeling. Estimated VLM rates from 1 Hz CryoSat-2 and high-frequency tide-gauge data reflect well the amplitude of coastal VLM as provided by NKG2016LU_abs. We find a coastal average of 2.4 mm/year (average over all tide gauges), while NKG2016LU_abs suggests 2.8 mm/year; the spatial correlation is 0.58. Article in Journal/Newspaper Fennoscandia Technical University of Denmark: DTU Orbit Remote Sensing 11 7 744 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
CryoSat-2 Land-uplift model Norwegian coast Tide gauges Vertical land motion /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
CryoSat-2 Land-uplift model Norwegian coast Tide gauges Vertical land motion /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Idžanović, Martina Gerlach, Christian Breili, Kristian Andersen, Ole Baltazar An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges |
topic_facet |
CryoSat-2 Land-uplift model Norwegian coast Tide gauges Vertical land motion /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Present-day climate-change-related ice-melting induces elastic glacial isostatic adjustment (GIA) effects, while paleo-GIA effects describe the ongoing viscous response to the melting of late-Pleistocene ice sheets. The unloading initiated an uplift of the crust close to the centers of former ice sheets. Today, vertical land motion (VLM) rates in Fennoscandia reach values up to around 10 mm/year and are dominated by GIA. Uplift signals from GIA can be computed by solving the sea-level equation (SLE), S˙ = N˙ − U˙ . All three quantities can also be determined from geodetic observations: relative sea-level variations ( S˙ ) are observed by means of tide gauges, while rates of absolute sea-level change ( N˙ ) can be observed by satellite altimetry; rates of VLM ( U˙ ) can be determined by GPS (Global Positioning System). Based on the SLE, U˙ can be derived by combining sea-surface measurements from satellite altimetry and relative sea-level records from tide gauges. In the present study, we have combined 7.5 years of CryoSat-2 satellite altimetry and tide-gauge data to estimate linear VLM rates at 20 tide gauges along the Norwegian coast. Thereby, we made use of monthly averaged tide-gauge data from PSMSL (Permanent Service for Mean Sea Level) and a high-frequency tide-gauge data set with 10-min sampling rate from NMA (Norwegian Mapping Authority). To validate our VLM estimates, we have compared them with the independent semi-empirical land-uplift model NKG2016LU_abs for the Nordic-Baltic region, which is based on GPS, levelling, and geodynamical modeling. Estimated VLM rates from 1 Hz CryoSat-2 and high-frequency tide-gauge data reflect well the amplitude of coastal VLM as provided by NKG2016LU_abs. We find a coastal average of 2.4 mm/year (average over all tide gauges), while NKG2016LU_abs suggests 2.8 mm/year; the spatial correlation is 0.58. |
format |
Article in Journal/Newspaper |
author |
Idžanović, Martina Gerlach, Christian Breili, Kristian Andersen, Ole Baltazar |
author_facet |
Idžanović, Martina Gerlach, Christian Breili, Kristian Andersen, Ole Baltazar |
author_sort |
Idžanović, Martina |
title |
An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges |
title_short |
An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges |
title_full |
An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges |
title_fullStr |
An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges |
title_full_unstemmed |
An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges |
title_sort |
attempt to observe vertical land motion along the norwegian coast by cryosat-2 and tide gauges |
publishDate |
2019 |
url |
https://orbit.dtu.dk/en/publications/37fac6b8-15d5-4986-aefb-7f7bda0cee67 https://doi.org/10.3390/rs11070744 https://backend.orbit.dtu.dk/ws/files/174287997/remotesensing_11_00744.pdf |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Idžanović , M , Gerlach , C , Breili , K & Andersen , O B 2019 , ' An attempt to observe vertical land motion along the norwegian coast by CryoSat-2 and tide gauges ' , Remote Sensing , vol. 11 , no. 7 , 744 . https://doi.org/10.3390/rs11070744 |
op_relation |
https://orbit.dtu.dk/en/publications/37fac6b8-15d5-4986-aefb-7f7bda0cee67 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/rs11070744 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
7 |
container_start_page |
744 |
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1797582528245137408 |