Details
| Original language | English |
|---|---|
| Article number | e2022MS003193 |
| Journal | Journal of Advances in Modeling Earth Systems |
| Volume | 14 |
| Issue number | 11 |
| Early online date | 17 Oct 2022 |
| Publication status | Published - 10 Nov 2022 |
| Externally published | Yes |
Abstract
To mitigate temporal aliasing effects in monthly mean global gravity fields from the GRACE and GRACE-FO satellite tandem missions, both tidal and non-tidal background models describing high-frequency mass variability in atmosphere and oceans are needed. To quantify tides in the atmosphere, we exploit the higher spatial (31 km) and temporal (1 hr) resolution provided by the latest atmospheric ECMWF reanalysis, ERA5. The oceanic response to atmospheric tides is subsequently modeled with the general ocean circulation model MPIOM (in a recently revised TP10L40 configuration that includes the feedback of self-attraction and loading to the momentum equations and has an improved bathymetry around Antarctica) as well as the shallow water model TiME (employing a much higher spatial resolution and more elaborate tidal dissipation than MPIOM). Both ocean models consider jointly the effects of atmospheric pressure variations and surface wind stress. We present the characteristics of 16 waves beating at frequencies in the 1–6 cpd band and find that TiME typically outperforms the corresponding results from MPIOM and also FES2014b as measured from comparisons with tide gauge data. Moreover, we note improvements in GRACE-FO laser ranging interferometer range-acceleration pre-fit residuals when employing the ocean tide solutions from TiME, in particular, for the S 1 spectral line with most notable improvements around Australia, India, and the northern part of South America.
Keywords
- ERA5, GRACE-FO, atmospheric forcing, atmospheric tides, de-aliasing, ocean tides
ASJC Scopus subject areas
- Environmental Science(all)
- Global and Planetary Change
- Environmental Science(all)
- Environmental Chemistry
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: Journal of Advances in Modeling Earth Systems, Vol. 14, No. 11, e2022MS003193, 10.11.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Atmospheric Contributions to Global Ocean Tides for Satellite Gravimetry
AU - Balidakis, Kyriakos
AU - Sulzbach, Roman
AU - Shihora, Linus
AU - Dahle, Christoph
AU - Dill, Robert
AU - Dobslaw, Henryk
N1 - Publisher Copyright: © 2022 The Authors. Journal of Advances in Modeling Earth Systems published by Wiley Periodicals LLC on behalf of American Geophysical Union.
PY - 2022/11/10
Y1 - 2022/11/10
N2 - To mitigate temporal aliasing effects in monthly mean global gravity fields from the GRACE and GRACE-FO satellite tandem missions, both tidal and non-tidal background models describing high-frequency mass variability in atmosphere and oceans are needed. To quantify tides in the atmosphere, we exploit the higher spatial (31 km) and temporal (1 hr) resolution provided by the latest atmospheric ECMWF reanalysis, ERA5. The oceanic response to atmospheric tides is subsequently modeled with the general ocean circulation model MPIOM (in a recently revised TP10L40 configuration that includes the feedback of self-attraction and loading to the momentum equations and has an improved bathymetry around Antarctica) as well as the shallow water model TiME (employing a much higher spatial resolution and more elaborate tidal dissipation than MPIOM). Both ocean models consider jointly the effects of atmospheric pressure variations and surface wind stress. We present the characteristics of 16 waves beating at frequencies in the 1–6 cpd band and find that TiME typically outperforms the corresponding results from MPIOM and also FES2014b as measured from comparisons with tide gauge data. Moreover, we note improvements in GRACE-FO laser ranging interferometer range-acceleration pre-fit residuals when employing the ocean tide solutions from TiME, in particular, for the S 1 spectral line with most notable improvements around Australia, India, and the northern part of South America.
AB - To mitigate temporal aliasing effects in monthly mean global gravity fields from the GRACE and GRACE-FO satellite tandem missions, both tidal and non-tidal background models describing high-frequency mass variability in atmosphere and oceans are needed. To quantify tides in the atmosphere, we exploit the higher spatial (31 km) and temporal (1 hr) resolution provided by the latest atmospheric ECMWF reanalysis, ERA5. The oceanic response to atmospheric tides is subsequently modeled with the general ocean circulation model MPIOM (in a recently revised TP10L40 configuration that includes the feedback of self-attraction and loading to the momentum equations and has an improved bathymetry around Antarctica) as well as the shallow water model TiME (employing a much higher spatial resolution and more elaborate tidal dissipation than MPIOM). Both ocean models consider jointly the effects of atmospheric pressure variations and surface wind stress. We present the characteristics of 16 waves beating at frequencies in the 1–6 cpd band and find that TiME typically outperforms the corresponding results from MPIOM and also FES2014b as measured from comparisons with tide gauge data. Moreover, we note improvements in GRACE-FO laser ranging interferometer range-acceleration pre-fit residuals when employing the ocean tide solutions from TiME, in particular, for the S 1 spectral line with most notable improvements around Australia, India, and the northern part of South America.
KW - ERA5
KW - GRACE-FO
KW - atmospheric forcing
KW - atmospheric tides
KW - de-aliasing
KW - ocean tides
UR - http://www.scopus.com/inward/record.url?scp=85141825996&partnerID=8YFLogxK
U2 - 10.1029/2022MS003193
DO - 10.1029/2022MS003193
M3 - Article
VL - 14
JO - Journal of Advances in Modeling Earth Systems
JF - Journal of Advances in Modeling Earth Systems
SN - 1942-2466
IS - 11
M1 - e2022MS003193
ER -