DOI: 10.1002/2014GL059614
论文题名: Consideration of tidal variations in the geocenter on satellite altimeter observations of ocean tides
作者: Desai S.D. ; Ray R.D.
刊名: Geophysical Research Letters
ISSN: 0094-10163
EISSN: 1944-9894
出版年: 2014
卷: 41, 期: 7 起始页码: 2454
结束页码: 2459
语种: 英语
英文关键词: altimetry
; geocenter
; ocean tides
Scopus关键词: Aneroid altimeters
; Meteorological instruments
; Satellites
; Structural geology
; altimetry
; Bottom pressure recorders
; Geocenter
; Ocean tides
; Orbit determination
; Satellite altimeter
; Satellite altimetry
; Sea surface height
; Tides
; bottom pressure
; ocean tide
; satellite altimetry
; sea surface height
; tidal cycle
英文摘要: Tidal geocenter motion has been previously ignored when developing ocean tide models from satellite altimetry. Accounting for tidal geocenter motion is necessary because the best orbit determinations for altimetric satellites position sea-surface heights relative to the center of mass of the total Earth system, including the ocean tides. But the ocean tides are presumed relative to the Earth's crust and thus are effectively relative to the center of figure. By accounting for this effect, we find improved agreement between an altimeter-based ocean tide model and bottom pressure recorder observations the variance of differences between these two observations is reduced by 31% and 43% for the two tidal constituents with the largest contributions to geocenter variations, O1 and K1, respectively. With this accommodation the predicted contribution from altimeter-based ocean tide models to geocenter variations is amplified by 15-22%, providing improved agreement with observations, especially for the K1 component. Key Points Tidal geocenter motion impacts ocean tide observations from satellite altimetry Geocenter motion has been previously ignored in altimetric ocean tide solutions Consistency between models and observations markedly improved for K1 and O1 © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84897360716&doi=10.1002%2f2014GL059614&partnerID=40&md5=3368743e4e8e62d6997c19df888064c2
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7427
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Desai S.D.,Ray R.D.. Consideration of tidal variations in the geocenter on satellite altimeter observations of ocean tides[J]. Geophysical Research Letters,2014-01-01,41(7).