Download Air-Ice-Ocean Interaction: Turbulent Ocean Boundary Layer by Miles McPhee PDF
By Miles McPhee
At a time while the polar areas are present process quick and unheard of switch, knowing exchanges of momentum, warmth and salt on the ice-ocean interface is necessary for realistically predicting the long run country of sea ice. via delivering a dimension platform principally unaffected via floor waves, drifting sea ice offers a distinct laboratory for learning elements of geophysical boundary layer flows which are super tricky to degree in other places. This publication attracts on either vast observations and theoretical ideas to improve a concise description of the effect of rigidity, rotation, and buoyancy at the turbulence scales that keep watch over exchanges among the ambience and underlying ocean whilst sea ice is current. a number of fascinating and precise observational info units are used to demonstrate various facets of ice-ocean interplay starting from the effect of salt on melting within the Greenland Sea marginal ice quarter, to how nonlinearities within the equation of country for seawater impact blending within the Weddell Sea.
The book’s content material, constructed from a sequence of lectures, will be applicable extra fabric for upper-level undergraduates and first-year graduate scholars learning the geophysics of sea ice and planetary boundary layers.
Miles McPhee plays geophysical examine, desirous about polar areas, either from McPhee learn corporation and as associate vital scientist on the college of Washington utilized Physics Laboratory. He has participated in additional that twenty box courses within the polar oceans of either hemispheres. Dr. McPhee additionally lectures on air-ice-sea interplay on the collage middle on Svalbard.
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Additional info for Air-Ice-Ocean Interaction: Turbulent Ocean Boundary Layer Exchange Processes
95, 11641–11654 (1990) McPhee, M. : Analysis and prediction of short term ice drift. Transactions of the ASME, J. Offshore Mech. , 110, 94–100 (1988) McPhee, M. : Is thermobaricity a major factor in Southern Ocean ventilation? , 15 (1), 153–160 (2003) McPhee, M. : Upwelling of Arctic pycnocline associated with shear motion of sea ice. Geophys. Res. : Geophysical Fluid Dynamics, Second Edition. D. thesis: Inertial Oscillations in the Mediterranean. MIT/WHOI (1970) Skyllingstad, E. , Paulson, C.
01 m s−1 and λ = 2 m, so −3 a reasonable estimate of ε is 5 × 10−7 m2 s (the units are equivalent to W kg−1 ). , where the local Reynolds number of the ﬂow is close to unity, υη /ν ∼ 1, υ and η being the small scale velocity and length scales, respectively. Kolmogorov hypothesized (see Batchelor 1967; Hinze 1975) that at these small scales, turbulence is statistically in equilibrium and uniquely determined by ε and ν. 8 × 10−6 m2 s , so the Kolmogorov scales for our example are about υ = 1 mm s−1 and η = 2 mm.
5 Turbulence Spectra and the Energy Cascade Spectral analysis provides an important tool for studying the cascade of energy from large to small scales in turbulent ﬂows. In many ﬁeld situations, it is relatively easier to measure variance spectra compared with direct covariance between vertical velocity and the quantity in question. Spectral techniques also often serve as an important check on the validity of turbulence measurements. Several textbooks treat the subject well, both as it pertains to the turbulence theory (Batchelor 1967; Hinze 1975; Tennekes and Lumley 1972) and for methods of estimating spectra (the following draws heavily on techniques described by Bloomﬁeld ).