Secular trends in ocean tides: Observations and model results
During the last century the response of the oceans to tidal forces has changed significantly. This study focuses on an analysis of long-term sea level records located in the Atlantic and Pacific, primarily in the Northern Hemisphere. It shows that changes of tidal amplitude and/or phase have taken p...
Published in: | Journal of Geophysical Research |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2011
|
Subjects: | |
Online Access: | http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401425 https://doi.org/10.1029/2010JC006387 |
id |
ftharvardudash:oai:dash.harvard.edu:1/41401425 |
---|---|
record_format |
openpolar |
spelling |
ftharvardudash:oai:dash.harvard.edu:1/41401425 2023-05-15T17:34:23+02:00 Secular trends in ocean tides: Observations and model results Müller, M. Arbic, B. K. Mitrovica, Jerry 2011 application/pdf http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401425 https://doi.org/10.1029/2010JC006387 en_US eng American Geophysical Union Journal of Geophysical Research Müller, M., B. K. Arbic, and J. X. Mitrovica. 2011. “Secular Trends in Ocean Tides: Observations and Model Results.” Journal of Geophysical Research 116 (C5). https://doi.org/10.1029/2010jc006387. 0022-1406 0148-0227 1934-2098 2156-2202 http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401425 doi:10.1029/2010JC006387 Journal Article 2011 ftharvardudash https://doi.org/10.1029/2010JC006387 https://doi.org/10.1029/2010jc006387 2022-04-05T18:52:38Z During the last century the response of the oceans to tidal forces has changed significantly. This study focuses on an analysis of long-term sea level records located in the Atlantic and Pacific, primarily in the Northern Hemisphere. It shows that changes of tidal amplitude and/or phase have taken place over large scales. The principal solar semidiurnal (S-2) tide shows the largest trends. At some locations, the change in the mean tidal range due to tidal trends is significant compared with the trend in mean sea level. Thus, it might be advisable to consider these changes in studies of the impact of rising sea level. Numerical simulations of the principal lunar semidiurnal tide (M-2) demonstrate a model sensitivity in the North Atlantic to changes in glacial isostatic adjustment and sea level rise, which captures 30-40% of the magnitude of the trends in observations. However, the spatial patterns do not agree well with those inferred from observations, suggesting that forward global models are currently useful for qualitative but not quantitative understanding of the observed trends. A global free oscillation synthesis indicates that sea level rise due to glacial isostatic adjustment leads to decreasing global resonant periods and increasing damping in the system and a coupled oscillator model shows that changes in sea level on the shelf are much more effective at perturbing shelf and ocean tides than sea level changes in the deep ocean. Version of Record Article in Journal/Newspaper North Atlantic Harvard University: DASH - Digital Access to Scholarship at Harvard Pacific Journal of Geophysical Research 116 C5 |
institution |
Open Polar |
collection |
Harvard University: DASH - Digital Access to Scholarship at Harvard |
op_collection_id |
ftharvardudash |
language |
English |
description |
During the last century the response of the oceans to tidal forces has changed significantly. This study focuses on an analysis of long-term sea level records located in the Atlantic and Pacific, primarily in the Northern Hemisphere. It shows that changes of tidal amplitude and/or phase have taken place over large scales. The principal solar semidiurnal (S-2) tide shows the largest trends. At some locations, the change in the mean tidal range due to tidal trends is significant compared with the trend in mean sea level. Thus, it might be advisable to consider these changes in studies of the impact of rising sea level. Numerical simulations of the principal lunar semidiurnal tide (M-2) demonstrate a model sensitivity in the North Atlantic to changes in glacial isostatic adjustment and sea level rise, which captures 30-40% of the magnitude of the trends in observations. However, the spatial patterns do not agree well with those inferred from observations, suggesting that forward global models are currently useful for qualitative but not quantitative understanding of the observed trends. A global free oscillation synthesis indicates that sea level rise due to glacial isostatic adjustment leads to decreasing global resonant periods and increasing damping in the system and a coupled oscillator model shows that changes in sea level on the shelf are much more effective at perturbing shelf and ocean tides than sea level changes in the deep ocean. Version of Record |
format |
Article in Journal/Newspaper |
author |
Müller, M. Arbic, B. K. Mitrovica, Jerry |
spellingShingle |
Müller, M. Arbic, B. K. Mitrovica, Jerry Secular trends in ocean tides: Observations and model results |
author_facet |
Müller, M. Arbic, B. K. Mitrovica, Jerry |
author_sort |
Müller, M. |
title |
Secular trends in ocean tides: Observations and model results |
title_short |
Secular trends in ocean tides: Observations and model results |
title_full |
Secular trends in ocean tides: Observations and model results |
title_fullStr |
Secular trends in ocean tides: Observations and model results |
title_full_unstemmed |
Secular trends in ocean tides: Observations and model results |
title_sort |
secular trends in ocean tides: observations and model results |
publisher |
American Geophysical Union |
publishDate |
2011 |
url |
http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401425 https://doi.org/10.1029/2010JC006387 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Geophysical Research Müller, M., B. K. Arbic, and J. X. Mitrovica. 2011. “Secular Trends in Ocean Tides: Observations and Model Results.” Journal of Geophysical Research 116 (C5). https://doi.org/10.1029/2010jc006387. 0022-1406 0148-0227 1934-2098 2156-2202 http://nrs.harvard.edu/urn-3:HUL.InstRepos:41401425 doi:10.1029/2010JC006387 |
op_doi |
https://doi.org/10.1029/2010JC006387 https://doi.org/10.1029/2010jc006387 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
C5 |
_version_ |
1766133205206827008 |