The propagation of a Gaussian Schell-model (GSM) beam with a coherent vortex dipole (CVD) through oceanic turbulence is studied in detail. The creation and annihilation of the CVDs occur with propagation, which is similar to the case of atmospheric turbulence. However, the appearance and vanishment of a coherent vortex may occur by varying the propagation distance, oceanic turbulence parameters, or beam parameters, which is different from the case of atmospheric turbulence. The stronger the oceanic turbulence, the faster the evolution process of the CVD carried by GSM beams.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/JOSAA.470096 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Brown Carbon in East Asia: Seasonality, Sources, and Influences on Regional Climate and Air Quality.
ACS Environ Au
January 2025
Department of Geography, Hong Kong Baptist University, Hong Kong SAR 999077, China.
Brown carbon (BrC) has been recognized as an important light-absorbing carbonaceous aerosol, yet understanding of its influence on regional climate and air quality has been lacking, mainly due to the ignorance of regional coupled meteorology-chemistry models. Besides, assumptions about its emissions in previous explorations might cause large uncertainties in estimates. Here, we implemented a BrC module into the WRF-Chem model that considers source-dependent absorption and avoids uncertainties caused by assumptions about emission intensities.
View Article and Find Full Text PDFThe eastern equatorial Atlantic hosts a productive marine ecosystem that depends on upward supply of nitrate, the primary limiting nutrient in this region. The annual productivity peak, indicated by elevated surface chlorophyll levels, occurs in the Northern Hemisphere summer, roughly coinciding with strengthened easterly winds. For enhanced productivity in the equatorial Atlantic, nitrate-rich water must rise into the turbulent layer above the Equatorial Undercurrent.
View Article and Find Full Text PDFFree space optical communication (FSOC) technology can be used for data transmission between ocean islands as backup wireless communication networks to cope with traffic surges and emergencies. In this paper, we experimentally demonstrate the results of a 24-h real-time single-wavelength 2.5-Gbps FSOC between two islands 29 km apart at a low altitude with low complexity.
View Article and Find Full Text PDFPatchiness of plankton ecosystem structure due to nutrient mixing along the shelf edge in the North Sea.
Sci Rep
January 2025
Globe Institute, Section for Biodiversity, University of Copenhagen, Universitetsparken 15, 2100, Copenhagen Ø, Denmark.
Mid-water column turbulence has been shown to cause elevated vertical nutrient flux at the shelf edge in the northeastern North Sea. Here, we demonstrate that phytoplankton communities in this region tend to be dominated by larger cells (estimated from percentage of chlorophyll captured on a 10 μm filter) than beyond the shelf edge. F/F (PSII electron transport capacity) corrected for photoinhibition in the surface layer correlated in this study with the percentage of chlorophyll captured on a 10 µm filter (assumed to be large cells), suggesting that the phytoplankton community was responding to increased nutrients in the euphotic zone by increasing photosynthetic efficiency and altering community composition.
View Article and Find Full Text PDFTurbulence in the tropical stratosphere, equatorial Kelvin waves, and the quasi-biennial oscillation.
Proc Natl Acad Sci U S A
January 2025
Laboratoire de Météorologie Dynamique/Institut Pierre Simon Laplace, École Normale Supérieure- Paris Sciences et Lettres Université, École Polytechnique- Institut Polytechnique de Paris, Sorbonne Université, CNRS, Paris 91128, France.
The tropical stratosphere is the gateway to the global stratosphere and a commonly proposed location for solar geoengineering. The dynamics of this remote and difficult to observe region are poorly understood, particularly at turbulent length scales. Existing observational estimates of turbulence frequency and strength vary widely.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!