Field measurements of turbulent mixing south of the Lombok Strait, Indonesia.

Autor: Susanto RD; Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD 20742 USA.; Marine-Estuarine and Environmental Sciences, University of Maryland, College Park, MD 20742 USA., Wei Z; First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, People's Republic of China., Santoso PD; Research Center for Deep Sea, National Research and Innovation Agency, Jakarta, Indonesia., Wang G; First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, People's Republic of China., Fadli M; Research Center for Deep Sea, National Research and Innovation Agency, Jakarta, Indonesia., Li S; First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, People's Republic of China., Agustiadi T; Research Center for Oceanography, National Research and Innovation Agency, Jakarta, Indonesia., Xu T; First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, People's Republic of China., Priyono B; Research Center for Oceanography, National Research and Innovation Agency, Jakarta, Indonesia., Li Y; First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, People's Republic of China., Fang G; First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao, People's Republic of China.
Jazyk: angličtina
Zdroj: Geoscience letters [Geosci Lett] 2024; Vol. 11 (1), pp. 36. Date of Electronic Publication: 2024 Aug 14.
DOI: 10.1186/s40562-024-00349-3
Abstrakt: The Indonesian seas, with their complex passages and vigorous mixing, constitute the only route and are critical in regulating Pacific-Indian Ocean interchange, air-sea interaction, and global climate events. Previous research employing remote sensing and numerical simulations strongly suggested that this mixing is tidally driven and localized in narrow channels and straits, with only a few direct observations to validate it. The current study offers the first comprehensive temporal microstructure observations in the south of Lombok Strait with a radius of 0.05° and centered on 115.54 o E and 9.02 o S. Fifteen days of tidal mixing observations measured potential temperature and density, salinity, and turbulent energy dissipation rate. The results revealed significant mixing and verified the remotely sensed technique. The south Lombok temporal and depth averaged of the turbulent kinetic energy dissipation rate, and the diapycnal diffusivity from 20 to 250 m are ε  = 4.15 ± 15.9) × 10 -6 W kg -1 and K ρ = (1.44 ± 10.7) × 10 -2 m 2 s -1 , respectively. This K ρ is up to 10 4 times larger than the Banda Sea [ K ρ  = (9.2 ± 0.55) × 10 -6 m 2 s -1 ] (Alford et al. Geophys Res Lett 26:2741-2744, 1999) or the "open ocean" K ρ = 0.03 × 10 -4  m 2 s -1 within 2° of the equator to (0.4-0.5) × 10 -4 m 2 s -1 at 50°-70° (Kunze et al. J Phys Oceanogr 36:1553-1576, 2006). Therefore, nonlinear interactions between internal tides, tidally induced mixing, and ITF plays a critical role regulating water mass transformation and have strong implications to longer-term variations and change of Pacific-Indian Ocean water circulation and climate.
Supplementary Information: The online version contains supplementary material available at 10.1186/s40562-024-00349-3.
Competing Interests: Competing interestsAll authors declare that they have no competing interests.
(© The Author(s) 2024.)
Databáze: MEDLINE
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