Articles | Volume 16, issue 5
https://doi.org/10.5194/os-16-1095-2020
© Author(s) 2020. 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-16-1095-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Response of near-inertial energy to a supercritical tropical cyclone and jet in the South China Sea: modelling study
Hiu Suet Kung
Department of Ocean Science and Department of Mathematics, Center for Ocean Research in Hong Kong and Macau, Hong Kong University of Science and
Technology, Hong Kong SAR, China
Department of Ocean Science and Department of Mathematics, Center for Ocean Research in Hong Kong and Macau, Hong Kong University of Science and
Technology, Hong Kong SAR, China
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Our study shows a high-resolution regional atmospheric model improves near-surface wind and air temperature simulation, resulting in improved circulation and hydrographic simulations in the Pearl River estuary. High-resolution wind forcing is critical for coastal circulation and cross-isobath transport, while high-resolution heat forcing greatly improves sea surface temperature simulation. High-resolution atmospheric forcing is essential for accurately simulating dynamic coastal ocean processes.
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In situ oxygen consumption rates were estimated for the first time during destruction of coastal hypoxia as disturbed by a typhoon and its reinstatement in the South China Sea off the Pearl River estuary. The reinstatement of summer hypoxia was rapid with a comparable timescale with that of its initial disturbance from frequent tropical cyclones, which has important implications for better understanding the intermittent nature of coastal hypoxia and its prediction in a changing climate.
Yanhong Lu, Shunyan Cheung, Ling Chen, Shuh-Ji Kao, Xiaomin Xia, Jianping Gan, Minhan Dai, and Hongbin Liu
Biogeosciences, 17, 6017–6032, https://doi.org/10.5194/bg-17-6017-2020, https://doi.org/10.5194/bg-17-6017-2020, 2020
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Through a comprehensive investigation, we observed differential niche partitioning among diverse ammonia-oxidizing archaea (AOA) sublineages in a typical subtropical estuary. Distinct AOA communities observed at DNA and RNA levels suggested that a strong divergence in ammonia-oxidizing activity among different AOA groups occurs. Our result highlights the importance of identifying major ammonia oxidizers at RNA level in future studies.
Jianzhong Su, Minhan Dai, Biyan He, Lifang Wang, Jianping Gan, Xianghui Guo, Huade Zhao, and Fengling Yu
Biogeosciences, 14, 4085–4099, https://doi.org/10.5194/bg-14-4085-2017, https://doi.org/10.5194/bg-14-4085-2017, 2017
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We provide direct and quantitative assessments showing the marine organic matter from eutrophication-induced primary production dominated oxygen consumption in the hypoxic zone, while the terrestrially sourced organic matter also significantly contributed to the formation and maintenance of hypoxia in the lower Pearl River Estuary (PRE) and the adjacent coastal water.
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A. Q. Han, M. H. Dai, J. P. Gan, S.-J. Kao, X. Z. Zhao, S. Jan, Q. Li, H. Lin, C.-T. A. Chen, L. Wang, J. Y. Hu, L. F. Wang, and F. Gong
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Short summary
Based on a well-validated ocean circulation model, we found that near-inertial oscillations (NIOs) and near-inertial kinetic energy (KEni) varied distinctly during forcing and relaxation stages of tropical cyclone (TC) forcing, and the horizontal and vertical transport of KEni was largely modulated by the velocity and vorticity of the jet in the semi-enclosed South China Sea (SCS). This study enriches our understanding of the spatial–temporal variability of NIOs in the frequently TC-affected SCS.
Based on a well-validated ocean circulation model, we found that near-inertial oscillations...