Influence analysis of Arctic tide gauges using leverages
Reconstructions of historical sea level in the Arctic Ocean are fraught with difficulties related to lack of data, uneven distribution of tide gauges and seasonal ice cover. Considering the period from 1950 to the present, we attempt to identify conspicuous tide gauges in an automated way, using the...
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ftdtupubl:oai:pure.atira.dk:publications/cd933983-2793-4d11-b420-4e5f08787e4e 2024-03-31T07:49:43+00:00 Influence analysis of Arctic tide gauges using leverages Svendsen, Peter Limkilde Andersen, Ole Baltazar Nielsen, Allan Aasbjerg 2014 application/pdf https://orbit.dtu.dk/en/publications/cd933983-2793-4d11-b420-4e5f08787e4e https://backend.orbit.dtu.dk/ws/files/96647607/influenceposter_1_.pdf eng eng https://orbit.dtu.dk/en/publications/cd933983-2793-4d11-b420-4e5f08787e4e info:eu-repo/semantics/openAccess Svendsen , P L , Andersen , O B & Nielsen , A A 2014 , ' Influence analysis of Arctic tide gauges using leverages ' , European Geosciences Union General Assembly 2014 , Vienna , Austria , 27/04/2014 - 02/05/2014 . conferenceObject 2014 ftdtupubl 2024-03-06T00:57:37Z Reconstructions of historical sea level in the Arctic Ocean are fraught with difficulties related to lack of data, uneven distribution of tide gauges and seasonal ice cover. Considering the period from 1950 to the present, we attempt to identify conspicuous tide gauges in an automated way, using the statistical leverage of each individual gauge. This may be of help in determining appropriate procedures for data preprocessing, of particular importance for the Arctic area as the GIA is hard to constrain and many gauges are located on rivers. We use a model based on empirical orthogonal functions from a calibration period, in this preliminary case Drakkar ocean model data, which are forced using historical tide gauge data from the PSMSL database. The resulting leverage for each tide gauge may indicate that it represents a distinct mode of variability, or that its time series is perturbed in a way inappropriate for the reconstruction so that it should be removed from the reconstruction model altogether. Therefore, the characteristics of the high-leverage gauges are examined in detail. Conference Object Arctic Arctic Arctic Ocean Technical University of Denmark: DTU Orbit Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
description |
Reconstructions of historical sea level in the Arctic Ocean are fraught with difficulties related to lack of data, uneven distribution of tide gauges and seasonal ice cover. Considering the period from 1950 to the present, we attempt to identify conspicuous tide gauges in an automated way, using the statistical leverage of each individual gauge. This may be of help in determining appropriate procedures for data preprocessing, of particular importance for the Arctic area as the GIA is hard to constrain and many gauges are located on rivers. We use a model based on empirical orthogonal functions from a calibration period, in this preliminary case Drakkar ocean model data, which are forced using historical tide gauge data from the PSMSL database. The resulting leverage for each tide gauge may indicate that it represents a distinct mode of variability, or that its time series is perturbed in a way inappropriate for the reconstruction so that it should be removed from the reconstruction model altogether. Therefore, the characteristics of the high-leverage gauges are examined in detail. |
format |
Conference Object |
author |
Svendsen, Peter Limkilde Andersen, Ole Baltazar Nielsen, Allan Aasbjerg |
spellingShingle |
Svendsen, Peter Limkilde Andersen, Ole Baltazar Nielsen, Allan Aasbjerg Influence analysis of Arctic tide gauges using leverages |
author_facet |
Svendsen, Peter Limkilde Andersen, Ole Baltazar Nielsen, Allan Aasbjerg |
author_sort |
Svendsen, Peter Limkilde |
title |
Influence analysis of Arctic tide gauges using leverages |
title_short |
Influence analysis of Arctic tide gauges using leverages |
title_full |
Influence analysis of Arctic tide gauges using leverages |
title_fullStr |
Influence analysis of Arctic tide gauges using leverages |
title_full_unstemmed |
Influence analysis of Arctic tide gauges using leverages |
title_sort |
influence analysis of arctic tide gauges using leverages |
publishDate |
2014 |
url |
https://orbit.dtu.dk/en/publications/cd933983-2793-4d11-b420-4e5f08787e4e https://backend.orbit.dtu.dk/ws/files/96647607/influenceposter_1_.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Arctic Ocean |
op_source |
Svendsen , P L , Andersen , O B & Nielsen , A A 2014 , ' Influence analysis of Arctic tide gauges using leverages ' , European Geosciences Union General Assembly 2014 , Vienna , Austria , 27/04/2014 - 02/05/2014 . |
op_relation |
https://orbit.dtu.dk/en/publications/cd933983-2793-4d11-b420-4e5f08787e4e |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1795027826175377408 |