Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges
Located at the intersection of the triple junction between the Nazca, South American, and Antarctic plates, the Chilean territory is subject to active lithospheric deformations and seismicity. Taking the difference between the satellite altimetry (ALT) data that give the absolute sea level variation...
Published in: | International Journal of Remote Sensing |
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ftunivchile:oai:repositorio.uchile.cl:2250/149533 2023-05-15T13:41:31+02:00 Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges Montecino, Henry D. Ferreira, Vagner G. Cuevas, Aharon Castro Cabrera, Leoncio Soto Báez, Juan Carlos de Freitas, Silvio R. C. 2017 application/pdf https://doi.org/10.1080/01431161.2017.1288306 https://repositorio.uchile.cl/handle/2250/149533 en eng Taylor & Francis International Journal of Remote Sensing, 38: 24, 7551-7565 doi:10.1080/01431161.2017.1288306 https://repositorio.uchile.cl/handle/2250/149533 Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ CC-BY-NC-ND International Journal of Remote Sensing Artículo de revista 2017 ftunivchile https://doi.org/10.1080/01431161.2017.1288306 2023-01-29T00:53:24Z Located at the intersection of the triple junction between the Nazca, South American, and Antarctic plates, the Chilean territory is subject to active lithospheric deformations and seismicity. Taking the difference between the satellite altimetry (ALT) data that give the absolute sea level variation and the tide gauge (TG) observations that record the relative sea level variation, we computed the absolute vertical crustal motion of the TG sites. We used 11 TG stations along the Chilean coast and altimeter measurements from multi-satellite missions (Topex, Jason-1 (A), and Jason-2) in nearby waters. The ALT-TG vertical deformations were compared with trends obtained from GPS measurements, which showed good consistency in terms of a correlation coefficient of about 0.9 (in 8 of 11 stations). Our results reveal that the behaviour of the long-term vertical deformations along the Chilean coast presented an important spatial variability. We also estimated the sea level change (SLC) through a multivariate model involving linear trend and decadal and inter-decadal climatic influence; in addition, the glacial isostatic adjustment effect was also removed. Our estimation of the SLC in the Chilean coast revealed an overall increase in sea level. The sea level in Chile does not strictly follow the global trend of the past two decades (similar to 3 mm year(-1)), but rather a slight agreement (from 1.2 to 0.6 mm year-(1)) from Arica up to Puerto Montt approximately, with the exception of PTAR and PWIL TGs, where we found a decrease of-0.9 and-0.8 mm year(-1), respectively. CNPq 306936/2015-1 National Natural Science Foundation of China 41574001 Article in Journal/Newspaper Antarc* Antarctic Universidad de Chile: Repositorio académico Antarctic International Journal of Remote Sensing 38 24 7551 7565 |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
description |
Located at the intersection of the triple junction between the Nazca, South American, and Antarctic plates, the Chilean territory is subject to active lithospheric deformations and seismicity. Taking the difference between the satellite altimetry (ALT) data that give the absolute sea level variation and the tide gauge (TG) observations that record the relative sea level variation, we computed the absolute vertical crustal motion of the TG sites. We used 11 TG stations along the Chilean coast and altimeter measurements from multi-satellite missions (Topex, Jason-1 (A), and Jason-2) in nearby waters. The ALT-TG vertical deformations were compared with trends obtained from GPS measurements, which showed good consistency in terms of a correlation coefficient of about 0.9 (in 8 of 11 stations). Our results reveal that the behaviour of the long-term vertical deformations along the Chilean coast presented an important spatial variability. We also estimated the sea level change (SLC) through a multivariate model involving linear trend and decadal and inter-decadal climatic influence; in addition, the glacial isostatic adjustment effect was also removed. Our estimation of the SLC in the Chilean coast revealed an overall increase in sea level. The sea level in Chile does not strictly follow the global trend of the past two decades (similar to 3 mm year(-1)), but rather a slight agreement (from 1.2 to 0.6 mm year-(1)) from Arica up to Puerto Montt approximately, with the exception of PTAR and PWIL TGs, where we found a decrease of-0.9 and-0.8 mm year(-1), respectively. CNPq 306936/2015-1 National Natural Science Foundation of China 41574001 |
format |
Article in Journal/Newspaper |
author |
Montecino, Henry D. Ferreira, Vagner G. Cuevas, Aharon Castro Cabrera, Leoncio Soto Báez, Juan Carlos de Freitas, Silvio R. C. |
spellingShingle |
Montecino, Henry D. Ferreira, Vagner G. Cuevas, Aharon Castro Cabrera, Leoncio Soto Báez, Juan Carlos de Freitas, Silvio R. C. Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges |
author_facet |
Montecino, Henry D. Ferreira, Vagner G. Cuevas, Aharon Castro Cabrera, Leoncio Soto Báez, Juan Carlos de Freitas, Silvio R. C. |
author_sort |
Montecino, Henry D. |
title |
Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges |
title_short |
Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges |
title_full |
Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges |
title_fullStr |
Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges |
title_full_unstemmed |
Vertical deformation and sea level changes in the coast of Chile by satellite altimetry and tide gauges |
title_sort |
vertical deformation and sea level changes in the coast of chile by satellite altimetry and tide gauges |
publisher |
Taylor & Francis |
publishDate |
2017 |
url |
https://doi.org/10.1080/01431161.2017.1288306 https://repositorio.uchile.cl/handle/2250/149533 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
International Journal of Remote Sensing |
op_relation |
International Journal of Remote Sensing, 38: 24, 7551-7565 doi:10.1080/01431161.2017.1288306 https://repositorio.uchile.cl/handle/2250/149533 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1080/01431161.2017.1288306 |
container_title |
International Journal of Remote Sensing |
container_volume |
38 |
container_issue |
24 |
container_start_page |
7551 |
op_container_end_page |
7565 |
_version_ |
1766151725136216064 |