Air-Ice-Ocean Interaction: Turbulent Ocean Boundary Layer by Miles McPhee

By Miles McPhee

At a time whilst the polar areas are present process speedy and unheard of swap, knowing exchanges of momentum, warmth and salt on the ice-ocean interface is necessary for realistically predicting the long run country of sea ice. by way of delivering a size platform principally unaffected through floor waves, drifting sea ice offers a distinct laboratory for learning points of geophysical boundary layer flows which are tremendous tricky to degree in different places. This ebook attracts on either wide observations and theoretical ideas to enhance a concise description of the effect of tension, rotation, and buoyancy at the turbulence scales that regulate exchanges among the ambience and underlying ocean whilst sea ice is current. a number of attention-grabbing and designated observational information units are used to demonstrate diversified elements of ice-ocean interplay starting from the influence of salt on melting within the Greenland Sea marginal ice sector, to how nonlinearities within the equation of country for seawater impact blending within the Weddell Sea.

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4 m and both are less than the isopycnal displacement shown in Fig. 7. The logical explanation is that heat was mixed more efficiently than salt so that as the pycnocline fluid moved upward in response to Ekman pumping, its temperature lowered faster than its salinity. 4 m more than the isohaline displacement. In Fig. 1 salinity bins. This strongly suggests that the upwelling event was capable of extracting heat from the upper pycnocline faster than salt. 36 2 Basic Physical Concepts Fig. 1 psu bins.

T/S characteristics of the idealized two-layer system from Figs. 10 are indicated by symbols (circle for upper, square for lower). See text for further details (see also colorplate on p. 204) Measured T, S, and σ0 profiles can be reasonably well represented in the upper 200 m of the water column by a two-layer system with an upper layer thickness of about 93 m. 03 kg m−3 . In oceanography it is customary to compare water masses via a temperature-salinity diagram, as drawn in Fig. 11a. The T/S pairs representing characteristics of the two (idealized) layers from Fig.

The practical salinity scale relates the measured conductivity of seawater to an international standard, and thus provides a unique salinity for given conductivity, temperature, and pressure, all of which can be measured to high accuracy with modern oceanographic instrumentation. , by Gill (1982, Appendix 3) and are used in this work. At low temperatures, the impact of changes in salinity on density is amplified relative to temperature changes because the thermal expansion factor, βT = − ρ1 ∂∂ Tρ , is small.

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