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Friday, October 9, 2020 | History

2 edition of Temperatire Fluctuations Near The Air-Sea Interface found in the catalog.

Temperatire Fluctuations Near The Air-Sea Interface

by John Gabriel McMillan

  • 327 Want to read
  • 27 Currently reading

Published by Naval Postgraduate School, Available from National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in English


ID Numbers
Open LibraryOL25181597M

in the near-surface layer can inhibit convection, thereby sup- pressing the heat and salt exchange with sub-surface layers and amplifying the surface anomalies. Atmospheric variations are also associated with the SST fluctuations shown in Fig. 1. Surface air temperature anoma- lies over the Greenland and Norwegian Seas with amplitudes. Air-Sea Interaction H. Chamock Introduction In preparing a chapter for a book such as this some nostalgia is excusable, even inevitable. For those who came to the subject, or came back to the subject, after the war there was a bewildering range of work going on. .

Air–sea interface, boundary between the atmosphere and the ocean waters. The interface is one of the most physically and chemically active of the Earth’s environments. Its neighbourhood supports most marine life. The atmosphere gains much of its heat at the interface in tropical latitudes by back. the air–sea fluxes contain a stochastic component. The conjectured mechanism permits stochastic fluctuations in the air–sea buoyancy fluxes to modify the time-mean mixed-layer depth. The mixed-layer depth is generally determined by the combined influence of surface buoyancy fluxes and turbulent winds, but only the surface buoyancy fluxes are.

We conducted high-resolution non-hydrostatic numerical simulations to study the effect of surfactants on near-surface turbulence. Laboratory experiments at the UM RSMAS ASIST facility presented in a companion paper report a reduction of turbulence below the air-sea interface and an increase of the surface drift velocity in the presence of surfactants. A turbulence-resolving parallelized atmospheric large-eddy simulation model (PALM) has been applied to study turbulent interactions between the humid atmospheric boundary layer (ABL) and the salt water oceanic mixed layer (OML). The most energetic three-dimensional turbulent eddies in the ABL–OML system (convective cells) were explicitly resolved in these simulations.


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Temperatire Fluctuations Near The Air-Sea Interface by John Gabriel McMillan Download PDF EPUB FB2

INVESTIGATION OF TEMPERATURE FLUCTUATIONS NEAR THE AIR-SEA INTERFACE by James Robert amzy Commander, Umted • States Navy B. S., Naval A cademy, and Ernest Tillson Young, Jr.

Lieutenant Commander, United States Navy B.S. Merchant Marine Academy, q Submitted in partial fulfillment of the requirements for the degree of. Temperature Fluctuations Near The Air-Sea Interface.

Investigation of temperature fluctuations near the air-sea interface. By James Robert Ramzy and Ernest Tillson Young. Get PDF (3 MB) Abstract. Approved for public release, distribution unlimitedMeasurements of air temperature fluctuations as close as cm above the surface of a pond in the presence of wind generated waves were made Author: James Robert Ramzy and Ernest Tillson Young.

Temperature Fluctuations Near The Air-Sea Interface. By John Gabriel McMillan Get PDF (3 MB)Author: John Gabriel McMillan. This book deals with density, temperature, velocity and concentration fluctuations in fluids and fluid mixtures. The book first reviews thermal fluctuations in equilibrium fluids on the basis of fluctuating.

The efficiency of transfer of gases and particles across the air-sea interface is controlled by several physical, biological and chemical processes in the atmosphere and water which are described. Hui Li Ph.D., P.E., in Pavement Materials for Heat Island Mitigation, Temperature Over Time.

The temperature fluctuations of pavement and near-surface air at various depths/heights over one day are shown in Figurealong with ambient air temperatures from weather data ([email protected] (Ambient)) for comparison. Figure shows that the area close to the.

The present study has two principal objectives: 1) to close momentum and heat balances spanning the air–sea interface in the presence of surface waves using cospectral estimates of the turbulent fluxes, and 2) to determine the extent to which classical views of rigid-boundary turbulence describe turbulence structures, turbulent fluxes, and.

ment of sound speed near the ocean surface. Medwin and his co-authors made measurements of sound-speed fluctuations near the surface with a cw signal transmitted between two horizontal hydrophones at various frequencies in the range 15 to kHz.

20'21 The sound speed was computed by mea. The deviation of the sea surface temperature from the water temperature below is calculated as a function of the heat flow through the air-sea interface, using wind tunnel determinations of the effective thermal diffusivity in a boundary layer.

The influence ofQ, shortwave radiation, andH, latent and sensible heat transfer plus effective back radiation, and U, wind speed, can be described by:T. The impact of waves on transports through the air–sea interface influences the TKE balance with a certain energy input and the diffusivity with a wave-related roughness length scale (see Yaglom and Kader,Craig and Banner, ).

• Breaking wind waves are associated with whitecaps, bubbles and sea spray. Exchange of mass or heat across a turbulent liquid‐gas interface is a problem of critical interest, especially in air‐sea transfer of natural and anthropogenic gases involved in the study of climate.

The goal in this research area is to determine the gas flux from air to sea or vice versa. Fluctuations in the mixed layer temperature at each grid point are driven by local flux exchanges across the air–sea interface, which could be linked to remote influences of ENSO.

These oceanic tempera-ture changes could in turn affect the atmospheric con-ditions aloft. The setup in such model runs (labeled as. However, with stability, this mean time scale gradually decreases to almost being equal to the integral scale in the near-neutral conditions.

Contrarily, for the long positive temperature fluctuation events, the mean time scales remain roughly equal to the integral scales, irrespective of stability.

12 aug to predict pavement surface temperature, a multiple linear regression was created computer models to predict maximum asphalt pavement surface temperatures from m orning. prediction of new observations adequacy of the regression model 2 coefficient of determination (r2) correlation regression on transformed.

(iii) Warm cells are characterized by strong temperature fluctuations. (iv) Warm air cells should appear preferentially at the bottom of the lattice, near the air-sea boundary.

This last point requires some elucidation. A primary consideration for the evolution of the temperature field is the determination of the shape of the temperature pro- file. We employed a high temperature conductance method to investigate the interface state properties of the Al 2 O 3 /B-doped diamond MOS structure by considering the surface potential fluctuation.

Based on Gaussian approximation of Nicollian's model and Brew's graphical approach, we analyzed the frequency dependent characteristics of parallel conductance (G p /ω–f) at various gate. This arrangement assures the absence of significant contributions from temperature or viscous fluctuations to the total intensity of the scattered light.

Moreover, since at a consolute point the diffusion coefficient vanishes, a liquid mixture near a consolute point has a very large Lewis number, so that the light-scattering intensity should be. SST is a key parameter for understanding air-sea interactions (Kawai and Wada, ; Wu et al., ; Zhang and McPhaden, ) by directly and indirectly controlling heat, momentum, salt and gas.

obtained from near-surface arrays coherently sampled acoustic Doppler velocimeters and thermistors. Turbulent fluxes of momentum and heat are computed as direct covariances of turbulent velocity and temperature fluctuations. Direct covariance estimates of turbulent fluxes on the water side of the air-sea interface are.

The wavelet spectrum of temperature fluctuations at m (Figs. 14b,c) illustrates the existence of the diurnal cycle of high-frequency temperature variance for periods ranging from 4 h to 5 min. Similar temperature fluctuations at multiple depths at MS3 (e.g., and m) were registered at all four moorings.

The air‐sea gas flux equation for poorly soluble gases is most unambiguously written in terms of the concentration difference across a thin layer below the air‐sea interface.

McGillis and Wanninkhof [ ] have identified a few important mechanisms by which temperature influences the calculated aqueous concentration gradient of CO 2.A surface slick changes the hydrodynamic boundary conditions in that the length scales of near surface turbulence controlling air sea gas exchange are modified.

The micro-scale temperature fluctuations at the water surface indicate that at low wind speeds the transport process is dominated by large-scale turbulence, whereas at higher wind.