Oceanic and Marine Circulation: Numerical Modelling and Analysis of Observations

A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Physical Oceanography".

Deadline for manuscript submissions: closed (5 March 2023) | Viewed by 3957

Special Issue Editor


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Guest Editor
Marchuk Institute of Numerical Mathematics of the Russian Academy of Sciences, Moscow 119333, Russia
Interests: oceanic and marine circulation; sea ice; numerical simulation; ocean modelling; air-sea interaction; large-scale and synoptic oceanic processes; oceanic turbulence parameterizations
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Special Issue Information

Dear Colleagues,

The ocean, along with the atmosphere, cryosphere, and soil, is a key component of the Earth climate system. Primarily, it serves as an accumulator of climate variability contributing to the formation of the Earth climate. The world ocean and its water areas play an important role in economic activity: transport, fishing, hydrocarbon production on the shelf, recreation, etc. Therefore, it is important to have the most complete information possible on the state of the oceans and seas to deliver scientific and practical needs.

There are a number of practical techniques for obtaining such information, which are mainly direct or indirect measurements of oceanographic characteristics. Thus, modern satellite observations make it possible to obtain information on sea surface height and temperature, while buoys and profilers provide information on the velocity of currents, temperature, and salinity in the seawater column. However, as a rule, these data are fragmented due to being spatiotemporal tracks with the partial or total absence of data in the deep ocean and/or in polar regions. An alternative way to examine the world ocean waters is the development of mathematical models of circulation, together with their practical implementation and the design of computational experiments. This approach has its errors since it is impossible to describe complex systems completely by models which always have various limitations. It is well known that the best results in reproducing marine and oceanic characteristics can be obtained using a combination of numerical modeling with the assimilation of observational data. Moreover, the most accurate predictions of the marine environment state require the application of numerical simulation.

This issue aims to cover different aspects of oceanic and marine circulation in the context of numerical simulation and analysis of observations, and, most desirably, combination of these two approaches. The authors can focus on original numerical methods, techniques of data collection and processing, as well as implementation of all these tools for the investigation of physical processes with possible scientific results. Moreover, problems around climate and climate change can be considered with respect to the ocean as the most inertial and accumulative element of the Earth climate system. Further, sea ice is a very important part of the cryosphere concerning the ocean, and we welcome papers on different aspects of sea ice studies.

Dr. Anatoly Gusev
Guest Editor

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Keywords

  • oceanic and marine circulation
  • sea ice
  • numerical simulation
  • ocean modelling
  • air-sea interaction
  • large-scale and synoptic oceanic processes
  • oceanic turbulence parameterizations
  • operational oceanography
  • observational data analysis

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Published Papers (2 papers)

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Research

13 pages, 4090 KiB  
Article
Atmosphere-Ocean Processes Governing Inflow to the Northern Caribbean Sea
by Mark R. Jury
J. Mar. Sci. Eng. 2023, 11(4), 718; https://doi.org/10.3390/jmse11040718 - 26 Mar 2023
Viewed by 1223
Abstract
Near-surface currents entering the northern Caribbean from the Atlantic are described using ocean reanalysis at monthly to daily timescales, underpinned by satellite data assimilation. Statistical analyses involved spatial clustering into current vector modes with associated time scores for quantifying spectral power and regression [...] Read more.
Near-surface currents entering the northern Caribbean from the Atlantic are described using ocean reanalysis at monthly to daily timescales, underpinned by satellite data assimilation. Statistical analyses involved spatial clustering into current vector modes with associated time scores for quantifying spectral power and regression onto atmospheric fields. Inflow across the Anegada, Mona, Windward (AMW) Passages peaks at ~100 m depth at ~0.2 m/s during summer and pulses at periods of 45, 100, and 365 days, and at 3, 6.5 years. The intra-seasonal periods may relate to Madden–Julian Oscillations and westward ocean Rossby waves, while inter-annual periods associate with regional climate anomalies. An empirical orthogonal function analysis demonstrates that AMW inflow varies across multiple timescales and is enhanced when the subtropical high-pressure ridge penetrates into the western Caribbean. A case study reveals key features during a surge of inflow to the northern Caribbean. Marine climate change involves heat advected poleward by currents along the western edge of the tropical Atlantic, fed through the Caribbean Sea. Consequently, the study of inflows garners wide interest. Full article
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21 pages, 2402 KiB  
Article
A Theory of Orbital-Forced Glacial Cycles: Resolving Pleistocene Puzzles
by Hsien-Wang Ou
J. Mar. Sci. Eng. 2023, 11(3), 564; https://doi.org/10.3390/jmse11030564 - 6 Mar 2023
Cited by 2 | Viewed by 2267
Abstract
It is recognized that orbital forcing of the ice sheet is through the summer air temperature, which however covaries with the sea surface temperature and both precede the ice volume signal, suggesting the ocean as an intermediary of the glacial cycles. To elucidate [...] Read more.
It is recognized that orbital forcing of the ice sheet is through the summer air temperature, which however covaries with the sea surface temperature and both precede the ice volume signal, suggesting the ocean as an intermediary of the glacial cycles. To elucidate the ocean role, I present here a minimal box model, which entails two key physics overlooked by most climate models. First, I discern a robust ‘convective’ bound on the ocean cooling in a coupled ocean/atmosphere, and second, because of their inherent turbulence, I posit that the climate is a macroscopic manifestation of a nonequilibrium thermodynamic system. As their deductive outcome, the ocean entails bistable equilibria of maximum entropy production, which would translate to bistable ice states of polar cap and Laurentide ice sheet, enabling large ice-volume signal when subjected to modulated forcing. Since the bistable interval is lowered during Pleistocene cooling, I show that its interplay with the ice–albedo feedback may account for the mid-Pleistocene transition from 41-ky obliquity cycles to 100-ky ice-age cycles paced by eccentricity. Observational tests of the theory and its parsimony in resolving myriad glacial puzzles suggest that the theory has captured the governing physics of the Pleistocene glacial cycles. Full article
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