Articles | Volume 17, issue 1
https://doi.org/10.5194/os-17-393-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-17-393-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Correlation between subsurface salinity anomalies in the Bay of Bengal and the Indian Ocean Dipole and governing mechanisms
Institute of Oceanography, Centre for Marine and Climate Research, University of Hamburg, Hamburg, Germany
Thomas Pohlmann
Institute of Oceanography, Centre for Marine and Climate Research, University of Hamburg, Hamburg, Germany
Xueen Chen
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao, China
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Geosci. Model Dev., 16, 2851–2871, https://doi.org/10.5194/gmd-16-2851-2023, https://doi.org/10.5194/gmd-16-2851-2023, 2023
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Internal solitary waves (ISWs) play crucial roles in mass transport and ocean mixing in the northern South China Sea. Massive numerical investigations have been conducted in this region, but there was no systematic evaluation of a three-dimensional model about precisely simulating ISWs. Here, an ISW forecasting model is employed to evaluate the roles of resolution, tidal forcing and stratification in accurately reproducing wave properties via comparison to field and remote-sensing observations.
Hao Huang, Pengyang Song, Shi Qiu, Jiaqi Guo, and Xueen Chen
Geosci. Model Dev., 16, 109–133, https://doi.org/10.5194/gmd-16-109-2023, https://doi.org/10.5194/gmd-16-109-2023, 2023
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The Oceanic Regional Circulation and Tide Model (ORCTM) is developed to reproduce internal solitary wave dynamics. The three-dimensional nonlinear momentum equations are involved with the nonhydrostatic pressure obtained via solving the Poisson equation. The validation experimental results agree with the internal wave theories and observations, demonstrating that the ORCTM can successfully describe the life cycle of nonlinear internal solitary waves under different oceanic environments.
Jiliang Xuan, Daji Huang, Thomas Pohlmann, Jian Su, Bernhard Mayer, Ruibin Ding, and Feng Zhou
Ocean Sci., 13, 105–122, https://doi.org/10.5194/os-13-105-2017, https://doi.org/10.5194/os-13-105-2017, 2017
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Research on the summer TWC has been conducted previously; however, the spatial structure and temporal variation of the winter TWC are less known due to its weak mean velocity. Therefore, FVCOM was used to evaluate the spatial patterns of TWC synoptic fluctuations. We observed that the TWC fluctuations appear mainly to the north of Taiwan and in the inshore area. Our results will be useful in the dynamical understanding of the winter TWC and its impact on cross-shore transport.
B. Mayer, T. Stacke, I. Stottmeister, and T. Pohlmann
Ocean Sci. Discuss., https://doi.org/10.5194/osd-12-863-2015, https://doi.org/10.5194/osd-12-863-2015, 2015
Revised manuscript not accepted
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The Indonesian Sunda Shelf (average depth 48 m) is subject to many physical and biogeochemical processes with a strong impact from human activities. For investigation of marine environmental water properties, it is important to know characteristic water exchange rates. With realistic computer model results, analytical flushing rates and tracer residence times were compared for different shelf regions. Only the latter give detailed 3D pictures with times of less than 30 days to more than 2 years.
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Short summary
In this study, we found that the interannual subsurface temperature and salinity variability of the Bay of Bengal (BoB) shows a remarkable delayed correlation with the Indian Ocean Dipole mode. We employed a regional model and determined the contributions of the coastal Kelvin waves and the westward-moving Rossby waves to this correlation. An analysis of the salinity budget revealed that the advection terms dominate the subsurface salinity changes in the BoB.
In this study, we found that the interannual subsurface temperature and salinity variability of...