✦ LIBER ✦

Laboratory simulation of light-focusing by water-surface waves

✍ Scribed by D. Stramski; L. Legendre

Publisher: Springer-Verlag
Year: 1992
Tongue: English
Weight: 795 KB
Volume: 114
Category: Article
ISSN: 0025-3162
DOI: 10.1007/bf00349537

No coin nor oath required. For personal study only.

✦ Synopsis

A laboratory system has been developed to simulate wave-induced irradiance fluctuations that occur in the top few metres of the sea under sunny surface conditions. A principle of operation is that the fluctuations are produced after refraction of light by water waves generated in the tank. Simulated irradiance consists of repetitive high-amplitude "flashes" resulting from a lens-effect of the waves. Statistical properties of flashes are similar to those recorded at sea. In our laboratory simulation, the flashes that exceed an amplitude level of 1.5E (where E" is the time-averaged irradiance) have a mean frequency of about 230 rain-1, and a typical duration of 5 to 20 ms. The frequency of the flashes decreases exponentially with increasing amplitude level. The system simulates timeaveraged irradiance comparable to full sunlight at shallow depths (~ 800 lamol quanta m-2s-1 over the visible spectral region), and provides light with a reasonable spectral composition. The simulation method was designed for studying responses of phytoplankton, but applications involving optical aspects can also be foreseen.

* Contribution to the program of GIROO (Group Interuniversitaire de Recherches Oc+anographiques du Quebec)

📜 SIMILAR VOLUMES

On the Efficient Numerical Simulation of

On the Efficient Numerical Simulation of Directionally Spread Surface Water Waves

✍ W.J.D. Bateman; C. Swan; P.H. Taylor 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 348 KB

This paper concerns the description of transient and highly nonlinear, near-breaking, surface water waves that are characterized by a spread of wave energy in both frequency and direction. A new spectral wave model is described that allows both the unsteadiness and the directionality of a wave field

Numerical simulation of non-linear regul

Numerical simulation of non-linear regular and focused waves in an infinite water-depth

✍ D.Z. Ning; B. Teng; R. Eatock Taylor; J. Zang 📂 Article 📅 2008 🏛 Elsevier Science 🌐 English ⚖ 908 KB

Diffraction of a focused X-ray beam by s

Diffraction of a focused X-ray beam by surface acoustic waves

✍ R. Tucoulou; I.A. Schelokov; D.V. Roshchupkin; M. Brunel; L. Ortega; P. Chevalli 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 816 KB

Phytoplankton photosynthetic adaptation

Phytoplankton photosynthetic adaptation to high frequency light fluctuations simulating those induced by sea surface waves

✍ B. Quéguiner; L. Legendre 📂 Article 📅 1986 🏛 Springer-Verlag 🌐 English ⚖ 682 KB

Laboratory experiments and numerical sim

Laboratory experiments and numerical simulation of sediment-wave formation by turbidity currents

✍ Yu’suke Kubo; Takeshi Nakajima 📂 Article 📅 2002 🏛 Elsevier Science 🌐 English ⚖ 940 KB

This paper presents the results of laboratory experiments and numerical simulations carried out in order to understand the mechanism of sediment-wave formation by turbidity currents. Experimental turbidity currents were generated in a 10-m-long laboratory flume, so as to investigate the topographic

Evaporation from extensive surfaces of w

Evaporation from extensive surfaces of water roughened by waves

✍ Ramalingam Norris 📂 Article 📅 1948 🏛 John Wiley and Sons 🌐 English ⚖ 540 KB

## Abstract The problem of evaporation from large expanses of water is of fundamental importance. The evaporation from oceans is of importance in studying the amount of water vapour which an air mass receives while flowing over the ocean. Among recent investigations on the problem of evaporation ma