Ocean Waves Breaking and Marine Aerosol Fluxes (Atmospheric and Oceanographic Sciences Library)

Ocean Waves Breaking and Marine Aerosol Fluxes Stanislaw R. Massel Institute of Oceanology of the Polish Academy of Sciences, Sopot, Poland This book presents a comprehensive study on the breaking of surface waves induced by wind and the relationship of breaking rate with marine aerosol fluxes. The book draws attention to the theoretical and experimental achievements in the study of wave breaking phenomena in deep water seas. In particular, it deals with the important problems of energy dissipation and the estimation of energy loss due to wave breaking in deep waters. The rationale behind existing methods and practical outcomes for the estimation of whitecap coverage of the sea surface and energy dissipation rate are given in detail. The book also focuses on the fundamentals of marine aerosols and their generation. The text provides a comprehensive overview of the currently available experimental data on marine aerosol fluxes and presents theoretical methodology of the estimation of the intensity of sea aerosol production. The systematic analysis leads to a novel approach in the development of links between aerosol production with sea state parameters and its seasonal variation in deep water seas. The book is intended for professionals and researchers in the areas of ocean physics and meteorology and also as a useful book for graduate students, PhD students, postdoctoral students, and engineers working on ocean environmental problems.

the Energy Flow From The Atmosphere To The Ocean Generates An Aerodynamically Rough Ocean Surface. If The Energy Flow Is Sufficiently Strong, In Some Points Of The Surface, Waves Loose Their Stability And Eventually Break In The Form Of Whitecaps Of Various Scales. The Turbulence Associated With The Breakers Produce The Aerosols In The Form Of Jet And Film Drops From The Bursting Of Air Bubbles. The Aerosol Droplets Transfer Water Vapour, Heat, Pollutants And Bacteria Through The Air-water Interface. They Are Easily Transported By Wind Over Large Distances. In This Way, Marine Aerosols Influence The Optical Features Of The Atmosphere, Which Are Of Fundamental Importance For The Remote Sensing Of The Surface And They Play An Important Role In Climate Variations.

the Amount Of Marine Aerosols Rising From The Sea Surface Depends On The Coverage Of The Sea By Breaking Waves Or Whitecaps, And The Rate Of Intensity Of Breaking. Much Of The Uncertainty In Sea Aerosols Production And Gas Transfer Arises From Weaknesses In The Parameterization Of Wave Breaking And Related Processes.

this Book Describes The Mechanisms Of Wave Breaking, Based On The Theoretical And Experimental Achievements Published In Literature As Well As On The Author's Experience. Special Attention Is Paid To Selection Of The Wave Breaking Criteria, And To Development Of The Wave Breaking Probability And Estimation Of The Energy Dissipation Due To Breaking.

secondly, The Book Examines The Relationships Between Wave Breaking And Marine Aerosol Fluxes And Gas Transfer From The Sea Surface. In General, An Amount Of Marine Aerosol Rising From The Sea Surface Depends On The Coverage Of The Sea By Breaking Waves Or Whitecaps, And On The Rate Of Intensity Of Breaking. The Wind Speed, Commonly Used In Prediction Of The Whitecaps Coverage, Is Only One Of The Factors Determining The Wave Energy And Probability Of The Breaking Occurrence. It Is More Appropriate To Find The Linkage Between The Percentage Of Sea Surface Covered By Whitecaps And The Sea State Characteristics (i.e. The Significant Wave Height And Spectrum Peak Frequency) And The Amount Of Energy Dissipated During Wave Breaking And Its Relationship With The Aerosol Fluxes.

The atmosphere and the ocean form a coupled system which exchanges heat, momentum and water at the air–sea interface. The interface is dynamic and masses and energy are continually transferred across the air–sea interface. The energy ?ow from the atmosphere to the ocean generates an aerodynamically rough sea surface. If the energy ?ow is su?ciently intense, at some points the surface waves will lose their stability and eventually break. Breaking is a very localized and non-stationary phenomenon that is a source of vorticity and turbulence. Dissipated energy becomes available for mixing the water layers and for whitecapping of various scales. Whitecapping is a strongly nonlinear process, which involves instability of the surface waves with space and time scales several orders of magnitude smaller than those associated with gravity wave motion. Whitecaps are usually formed at or near the crests of the larger waves and occur in groups with successive crests breaking downwind of one another. Wave breaking is the dominant generator of the ‘primary’ marine aerosol (sea salt) and it is a major factor in the air–sea exchange of gases (including carbon dioxide). Most of the aerosol generated from natural waters is in the form of jet and ?lm drops from the bursting of air bubbles (Monahan and Van Patten, 1989). The enriched aerosols associated with the ejected droplets are very - portant in maintaining a source of salt-laden cloud condensation nuclei as well asinterfacial?uxesoftraceconstituents,includingbacteria,viruses,heavym- als, radioactivity and organic material (Kerman, 1986). Front Matter....Pages I-XVI Basic processes near the air—sea interface....Pages 1-9 Mechanics of steep and breaking waves....Pages 11-29 Spectral and statistical properties of ocean waves....Pages 31-73 Experimental insights into mechanisms of wave breaking....Pages 75-120 Wave breaking criteria and probability of breaking....Pages 121-155 Energy dissipation due to wave breaking....Pages 157-181 Whitecap coverage of the sea surface....Pages 183-206 Fundamentals of marine aerosols....Pages 207-228 Marine aerosol fluxes....Pages 229-246 Aerosol flux as a function of sea state parameters....Pages 247-260 Seasonal dependence of aerosol fluxes in the Baltic Sea....Pages 261-270 Back Matter....Pages 271-325