Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018
In recent years, there has been a large focus on the Arctic due to the rapid changes of the region. Arctic sea level determination is challenging due to the seasonal to permanent sea-ice cover, lack of regional coverage of satellites, satellite instruments ability to measure ice, insufficient geophy...
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ftdtupubl:oai:pure.atira.dk:publications/b51695c2-ddbc-48bb-a221-a471e94b2827 2024-04-28T08:04:13+00:00 Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 Kildegaard Rose, Stine Andersen, Ole Baltazar Passaro, Marcello Ludwigsen, Carsten Ankjær Schwatke, Christian 2019 application/pdf https://orbit.dtu.dk/en/publications/b51695c2-ddbc-48bb-a221-a471e94b2827 https://doi.org/10.3390/rs11141672 https://backend.orbit.dtu.dk/ws/files/191607898/remotesensing_11_01672_v2.pdf eng eng https://orbit.dtu.dk/en/publications/b51695c2-ddbc-48bb-a221-a471e94b2827 info:eu-repo/semantics/openAccess Kildegaard Rose , S , Andersen , O B , Passaro , M , Ludwigsen , C A & Schwatke , C 2019 , ' Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 ' , Remote Sensing , vol. 11 , no. 14 , 1672 . https://doi.org/10.3390/rs11141672 Radar altimetry Satellite altimetry Arctic ocean Remote sensing of the oceans Sea level rise Polar area /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2019 ftdtupubl https://doi.org/10.3390/rs11141672 2024-04-03T15:40:44Z In recent years, there has been a large focus on the Arctic due to the rapid changes of the region. Arctic sea level determination is challenging due to the seasonal to permanent sea-ice cover, lack of regional coverage of satellites, satellite instruments ability to measure ice, insufficient geophysical models, residual orbit errors, challenging retracking of satellite altimeter data. We present the European Space Agency (ESA) Climate Change Initiative (CCI) Technical University of Denmark (DTU)/Technischen Universitat Munchen (TUM) sea level anomaly (SLA) record based on radar satellite altimetry data in the Arctic Ocean from the European Remote Sensing satellite number 1 (ERS-1) (1991) to CryoSat-2 (2018). We use updated geophysical corrections and a combination of altimeter data: Reprocessing of Altimeter Product for ERS (REAPER) (ERS-1), ALES+ retracker (ERS-2, Envisat), combination of Radar Altimetry Database System (RADS) and DTUs in-house retracker LARS (CryoSat-2). Furthermore, this study focuses on the transition between conventional and Synthetic Aperture Radar (SAR) altimeter data to make a smooth time series regarding the measurement method. We find a sea level rise of 1.54 mm/year from September 1991 to September 2018 with a 95% confidence interval from 1.16 to 1.81 mm/year. ERS-1 data is troublesome and when ignoring this satellite the SLA trend becomes 2.22 mm/year with a 95% confidence interval within 1.67-2.54 mm/year. Evaluating the SLA trends in 5 year intervals show a clear steepening of the SLA trend around 2004. The sea level anomaly record is validated against tide gauges and show good results. Additionally, the time series is split and evaluated in space and time. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Climate change Sea ice Technical University of Denmark: DTU Orbit Remote Sensing 11 14 1672 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Radar altimetry Satellite altimetry Arctic ocean Remote sensing of the oceans Sea level rise Polar area /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
Radar altimetry Satellite altimetry Arctic ocean Remote sensing of the oceans Sea level rise Polar area /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Kildegaard Rose, Stine Andersen, Ole Baltazar Passaro, Marcello Ludwigsen, Carsten Ankjær Schwatke, Christian Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 |
topic_facet |
Radar altimetry Satellite altimetry Arctic ocean Remote sensing of the oceans Sea level rise Polar area /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
In recent years, there has been a large focus on the Arctic due to the rapid changes of the region. Arctic sea level determination is challenging due to the seasonal to permanent sea-ice cover, lack of regional coverage of satellites, satellite instruments ability to measure ice, insufficient geophysical models, residual orbit errors, challenging retracking of satellite altimeter data. We present the European Space Agency (ESA) Climate Change Initiative (CCI) Technical University of Denmark (DTU)/Technischen Universitat Munchen (TUM) sea level anomaly (SLA) record based on radar satellite altimetry data in the Arctic Ocean from the European Remote Sensing satellite number 1 (ERS-1) (1991) to CryoSat-2 (2018). We use updated geophysical corrections and a combination of altimeter data: Reprocessing of Altimeter Product for ERS (REAPER) (ERS-1), ALES+ retracker (ERS-2, Envisat), combination of Radar Altimetry Database System (RADS) and DTUs in-house retracker LARS (CryoSat-2). Furthermore, this study focuses on the transition between conventional and Synthetic Aperture Radar (SAR) altimeter data to make a smooth time series regarding the measurement method. We find a sea level rise of 1.54 mm/year from September 1991 to September 2018 with a 95% confidence interval from 1.16 to 1.81 mm/year. ERS-1 data is troublesome and when ignoring this satellite the SLA trend becomes 2.22 mm/year with a 95% confidence interval within 1.67-2.54 mm/year. Evaluating the SLA trends in 5 year intervals show a clear steepening of the SLA trend around 2004. The sea level anomaly record is validated against tide gauges and show good results. Additionally, the time series is split and evaluated in space and time. |
format |
Article in Journal/Newspaper |
author |
Kildegaard Rose, Stine Andersen, Ole Baltazar Passaro, Marcello Ludwigsen, Carsten Ankjær Schwatke, Christian |
author_facet |
Kildegaard Rose, Stine Andersen, Ole Baltazar Passaro, Marcello Ludwigsen, Carsten Ankjær Schwatke, Christian |
author_sort |
Kildegaard Rose, Stine |
title |
Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 |
title_short |
Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 |
title_full |
Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 |
title_fullStr |
Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 |
title_full_unstemmed |
Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 |
title_sort |
arctic ocean sea level record from the complete radar altimetry era: 1991-2018 |
publishDate |
2019 |
url |
https://orbit.dtu.dk/en/publications/b51695c2-ddbc-48bb-a221-a471e94b2827 https://doi.org/10.3390/rs11141672 https://backend.orbit.dtu.dk/ws/files/191607898/remotesensing_11_01672_v2.pdf |
genre |
Arctic Arctic Arctic Ocean Climate change Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Climate change Sea ice |
op_source |
Kildegaard Rose , S , Andersen , O B , Passaro , M , Ludwigsen , C A & Schwatke , C 2019 , ' Arctic Ocean Sea Level Record from the Complete Radar Altimetry Era: 1991-2018 ' , Remote Sensing , vol. 11 , no. 14 , 1672 . https://doi.org/10.3390/rs11141672 |
op_relation |
https://orbit.dtu.dk/en/publications/b51695c2-ddbc-48bb-a221-a471e94b2827 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/rs11141672 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
14 |
container_start_page |
1672 |
_version_ |
1797575018981359616 |