Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry
Dual-satellite crossover data from the Jason-2 and Cryosat-2 altimeter missions are used in a novel approach to quantify stationary and nonstationary tides from time-lagged mean square sea surface height (SSH) differences, computed for lags from 1 to 1440 h (60 days). The approach is made feasible b...
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ftportlandstate:oai:pdxscholar.library.pdx.edu:cengin_fac-1199 2023-06-11T04:14:44+02:00 Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry Zaron, Edward D. 2015-09-01T07:00:00Z application/pdf https://pdxscholar.library.pdx.edu/cengin_fac/199 https://doi.org/10.1175/JPO-D-15-0020.1 https://pdxscholar.library.pdx.edu/context/cengin_fac/article/1199/viewcontent/zaron_nonstationary_internal_tides_observed_using_dual_satellite_altimetry.pdf unknown PDXScholar https://pdxscholar.library.pdx.edu/cengin_fac/199 doi:10.1175/JPO-D-15-0020.1 https://pdxscholar.library.pdx.edu/context/cengin_fac/article/1199/viewcontent/zaron_nonstationary_internal_tides_observed_using_dual_satellite_altimetry.pdf Civil and Environmental Engineering Faculty Publications and Presentations North Atlantic Ocean Tidal currents Oceanography Surface waves (Water) Ocean models Data assimilation Civil and Environmental Engineering text 2015 ftportlandstate https://doi.org/10.1175/JPO-D-15-0020.1 2023-05-04T18:03:28Z Dual-satellite crossover data from the Jason-2 and Cryosat-2 altimeter missions are used in a novel approach to quantify stationary and nonstationary tides from time-lagged mean square sea surface height (SSH) differences, computed for lags from 1 to 1440 h (60 days). The approach is made feasible by removing independent estimates of the stationary tide and mesoscale SSH variance, which greatly reduces the sampling error of the SSH statistics. For the semidiurnal tidal band, the stationary tidal variance is approximately 0.73 cm(2), and the nonstationary variance is about 0.33 cm(2), or 30% of the total. The temporal correlation of the nonstationary tide is examined by complex demodulation and found to be oscillatory with first 0 crossing at 400 h (17 days). Because a significant fraction of the time-variable mesoscale signal is resolved at time scales of roughly 150 h by the present constellation of satellite altimeters, the results suggest that it may be feasible to predict the nonstationary tide from modulations of the resolved mesoscale, thus enhancing the efficacy of tidal corrections for planned wide-swath altimeters such as the Surface Water and Ocean Topography (SWOT) mission. Text North Atlantic Portland State University: PDXScholar Journal of Physical Oceanography 45 9 2239 2246 |
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Open Polar |
collection |
Portland State University: PDXScholar |
op_collection_id |
ftportlandstate |
language |
unknown |
topic |
North Atlantic Ocean Tidal currents Oceanography Surface waves (Water) Ocean models Data assimilation Civil and Environmental Engineering |
spellingShingle |
North Atlantic Ocean Tidal currents Oceanography Surface waves (Water) Ocean models Data assimilation Civil and Environmental Engineering Zaron, Edward D. Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry |
topic_facet |
North Atlantic Ocean Tidal currents Oceanography Surface waves (Water) Ocean models Data assimilation Civil and Environmental Engineering |
description |
Dual-satellite crossover data from the Jason-2 and Cryosat-2 altimeter missions are used in a novel approach to quantify stationary and nonstationary tides from time-lagged mean square sea surface height (SSH) differences, computed for lags from 1 to 1440 h (60 days). The approach is made feasible by removing independent estimates of the stationary tide and mesoscale SSH variance, which greatly reduces the sampling error of the SSH statistics. For the semidiurnal tidal band, the stationary tidal variance is approximately 0.73 cm(2), and the nonstationary variance is about 0.33 cm(2), or 30% of the total. The temporal correlation of the nonstationary tide is examined by complex demodulation and found to be oscillatory with first 0 crossing at 400 h (17 days). Because a significant fraction of the time-variable mesoscale signal is resolved at time scales of roughly 150 h by the present constellation of satellite altimeters, the results suggest that it may be feasible to predict the nonstationary tide from modulations of the resolved mesoscale, thus enhancing the efficacy of tidal corrections for planned wide-swath altimeters such as the Surface Water and Ocean Topography (SWOT) mission. |
format |
Text |
author |
Zaron, Edward D. |
author_facet |
Zaron, Edward D. |
author_sort |
Zaron, Edward D. |
title |
Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry |
title_short |
Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry |
title_full |
Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry |
title_fullStr |
Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry |
title_full_unstemmed |
Nonstationary Internal Tides Observed Using Dual-Satellite Altimetry |
title_sort |
nonstationary internal tides observed using dual-satellite altimetry |
publisher |
PDXScholar |
publishDate |
2015 |
url |
https://pdxscholar.library.pdx.edu/cengin_fac/199 https://doi.org/10.1175/JPO-D-15-0020.1 https://pdxscholar.library.pdx.edu/context/cengin_fac/article/1199/viewcontent/zaron_nonstationary_internal_tides_observed_using_dual_satellite_altimetry.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Civil and Environmental Engineering Faculty Publications and Presentations |
op_relation |
https://pdxscholar.library.pdx.edu/cengin_fac/199 doi:10.1175/JPO-D-15-0020.1 https://pdxscholar.library.pdx.edu/context/cengin_fac/article/1199/viewcontent/zaron_nonstationary_internal_tides_observed_using_dual_satellite_altimetry.pdf |
op_doi |
https://doi.org/10.1175/JPO-D-15-0020.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
45 |
container_issue |
9 |
container_start_page |
2239 |
op_container_end_page |
2246 |
_version_ |
1768370999173054464 |