Influence of Nonseasonal River Discharge on Sea Surface Salinity and Height

Chandanpurkar, H. A.; Lee, Tong; Wang, Xiaochun; Hong, Zhang; Fournier, Séverine; Fenty, Ian; Fukumori, Ichiro; Menemenlis, Dimitris; Piecuch, C. G.; Reager, J. T.; Wang, Ou; Worden, J.

doi:10.1029/2021ms002715

Cited by 11 publications

(5 citation statements)

References 68 publications

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“…For example, Piecuch et al (2018) suggested that the rive discharge is significantly correlated to sea-level changes on the United States Atlantic and Gulf coasts. Chandanpurkar et al (2022) predicted nonseasonal river-discharge impact on sea level variability using the simplified theory proposed by Piecuch et al (2018). Similarly, precipitation and buoyancy forcings could also play roles in the variations of coastal sea level (Lee et al, 2019;Wang et al, 2022).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Relative Contributions of Open‐Ocean Forcing and Local Wind to Sea Level Variability Along the West Coasts of Ocean Basins

Lin

et al. 2022

JGR Oceans

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This study aims to reconstruct sea level at the coast by quantifying relative contributions of local wind forcing and the penetrated open‐ocean signals, and thus to build a dynamical connection that seamlessly links the ocean basin to the coast. A linear, modified arrested topographic wave (ATW) model is used to examine the transmission of interior sea level across the continental shelf and the role of alongshore wind in determining the coastal sea level. The local wind stress substantially influences the coastal sea level but does not affect the transmission of open‐ocean signals in the linear framework. Increased bottom friction or gentler slope of shelf favors the penetration of open‐ocean signals. This modified ATW model is then applied to the shelf seas of North Pacific and North Atlantic, with model parameters being set according to the realistic features of regional oceanography. The offshore boundary condition is determined by the integrated barotropic and baroclinic ocean responses in the ocean basin and the transmission processes across western boundary currents. Based on the proposed “basin‐to‐coast” dynamical linkage framework, one can estimate the relative contributions of open‐ocean forcing and local wind to the total coastal sea level. According to these partitions, the reconstructed coastal sea levels along the west coasts of North Pacific and North Atlantic on seasonal time scale are in close agreement with tide‐gauge observations. The idea and specific calculations of coastal sea level reconstruction could be readily applied to other coasts of the global ocean.

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Section: Conclusion and Discussionmentioning

confidence: 99%

“…Chandanpurkar et al. (2022) predicted nonseasonal river‐discharge impact on sea level variability using the simplified theory proposed by Piecuch et al. (2018).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

Relative Contributions of Open‐Ocean Forcing and Local Wind to Sea Level Variability Along the West Coasts of Ocean Basins

Lin

et al. 2022

JGR Oceans

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“…Deep-learning networks have been widely used in oceanography due to the strong feature extraction capability. At present, it is difficult to obtain ocean observation data and the data sources are scarce, which has an impact on the performance of assimilation [14,23,24]. The characteristics of satellite observation data in a large range can effectively expand ocean observation data, but satellite observation can only obtain ocean surface information, and it is difficult to provide deep ocean information for assimilation algorithms [25].…”

Section: Methodsmentioning

confidence: 99%

The Inversion of Three-Dimensional Ocean Temperature and Salinity Fields for the Assimilation of Satellite Observations

Zhao,

He,

Jiang

2024

JMSE

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The lack of dimensionality of ocean observations makes it difficult to utilize multi-scale data assimilation to correct model errors with limited observations. Since satellite observations can provide high-resolution and time-continuous sea surface information, this study utilizes sea surface temperature (SST), sea surface salinity (SSS), and sea surface height (SSH) anomalies to invert the vertical temperature and salinity fields and thus realize multi-scale data assimilation in the three-dimensional space. We propose a temperature and salinity inversion network (TSI-Net) for reconstructing the mapping of the sea surface’s spatial distribution features to vertical structural features to obtain pseudo-observed fields. In this study, measured satellite remote-sensing data and temperature and salinity profiles are used to correct the model errors in the waters around the China Sea. The sensitivity analysis shows that the multi-component inversion can better fit the temperature field relationship, with a correlation coefficient of about 0.87. The results of the assimilation experiments show that the analytical field obtained by assimilating the pseudo-observed field is more consistent with the target field in terms of the spatial distribution characteristics.

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“…ESTAR, STARRS, SMOS, Aquarius and SMAP). More detailed information on this is given in [20] [21], and references therein. Another interesting aspect is the combination of sea surface salinity from these sensors and sea surface height from satellite altimetry [21] but this is out of the scope of our work.…”

Section: Introductionmentioning

confidence: 99%

Satellite Radar Altimetry Supporting Coastal Hydrology: Case Studies of Guadalquivir River Estuary and Ebro River Delta (Spain)

Gómez-Enri,

Aldarias,

Mulero-Martínez

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Coastal zones close to big river systems are hydrodynamically characterised by inland and open ocean waters. Satellite altimetry data have recently been scientificallyexploited in coastal zones. However, more efforts are still needed in terms of using these data in new applications in the coastal strip. Our study analyses the capability of the European Space Agency CryoSat-2 satellite to measure the sea level elevation associated with bulge-like lens of less salty waters from river discharges, spreading into the adjacent coastal zones. We analyse four events of high river freshwater discharges in two river estuaries in Spain: Guadalquivir and Ebro. We obtain alongtrack Absolute Dynamic Topography from CryoSat-2 satellite during these events and compare them with periods of low discharge conditions. In three of the events, the bulges increase the sea level between 5 and 10 cm with respect to the sea level observed in low / normal discharge conditions. The extension of the lens is far from the estuary mouth: more than 25 km from the coast in the case of the Guadalquivir River and about 50 km for the Ebro River. The wind regime and the surface circulation explain the lack of a higher sea level in one of the events analysed.

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Influence of Nonseasonal River Discharge on Sea Surface Salinity and Height

Abstract: River discharge into the ocean influences a range of ocean properties and processes, such as salinity, ocean dynamics, marine biology and ecosystems, and biogeochemistry (e.g.,

Cited by 11 publications

References 68 publications

Relative Contributions of Open‐Ocean Forcing and Local Wind to Sea Level Variability Along the West Coasts of Ocean Basins

Relative Contributions of Open‐Ocean Forcing and Local Wind to Sea Level Variability Along the West Coasts of Ocean Basins

The Inversion of Three-Dimensional Ocean Temperature and Salinity Fields for the Assimilation of Satellite Observations

Satellite Radar Altimetry Supporting Coastal Hydrology: Case Studies of Guadalquivir River Estuary and Ebro River Delta (Spain)

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