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Acronyms that contain the term potential density 

What does potential density mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: potential density.

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P

Potential

Academic & Science » Electronics

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LDL

Low Density Lipoprotein

Medical » Physiology

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HD

High Density

Academic & Science » Electronics

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PDF

Probability Density Function

Academic & Science » Mathematics

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HDL

High Density Lipoprotein

Medical » Laboratory

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HDL

High Density Lipoprotein

Medical » Physiology

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ZPD

Zeta Potential Distribution

Academic & Science » Physics

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OD

Optical Density

Academic & Science » Ocean Science

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PH

Potential Health

Medical » Physiology

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BMD

Bone Mineral Density

Medical » Physiology

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DFT

Density Functional Theory

Academic & Science » Mathematics

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DFT

Density Functional Theory

Academic & Science » Electronics

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HDPE

High Density PolyEthylene

Miscellaneous » Plastics

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HDPE

High Density PolyEthylene

Academic & Science » Electronics

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LDL

Low-Density Lipoprotein (Cholesterol)

Medical » Laboratory

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DOS

Density Of States

Academic & Science » Electronics

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LDPE

Low Density Poly-Ethylene

Miscellaneous » Plastics

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VLDL

Very Low Density Lipoprotein

Medical » Physiology

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VLDL

Very Low Density Lipoprotein

Medical » Human Genome

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VLDL

Very Low Density Lipoprotein

Medical » Laboratory

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VLDL

Very Low Density Lipoprotein

Miscellaneous » Food & Nutrition

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ND

Neutral Density

Academic & Science » Ocean Science

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PSD

Power Spectral Density

Academic & Science » Electronics

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MDF

Medium Density Fiberboard

Business » Products

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LDA

Local Density Approximation

Academic & Science » Electronics

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What does potential density mean?

Potential density
The potential density of a fluid parcel at pressure P {\displaystyle P} is the density that the parcel would acquire if adiabatically brought to a reference pressure P 0 {\displaystyle P_{0}} , often 1 bar (100 kPa). Whereas density changes with changing pressure, potential density of a fluid parcel is conserved as the pressure experienced by the parcel changes (provided no mixing with other parcels or net heat flux occurs). The concept is used in oceanography and (to a lesser extent) atmospheric science. Potential density is a dynamically important property: for static stability potential density must decrease upward. If it doesn't, a fluid parcel displaced upward finds itself lighter than its neighbors, and continues to move upward; similarly, a fluid parcel displaced downward would be heavier than its neighbors. This is true even if the density of the fluid decreases upward. In stable conditions (potential density decreasing upward) motion along surfaces of constant potential density (isopycnals) is energetically favored over flow across these surfaces (diapycnal flow), so most of the motion within a 3-D geophysical fluid takes place along these 2-D surfaces. In oceanography, the symbol ρ θ {\displaystyle \rho _{\theta }} is used to denote potential density, with the reference pressure P 0 {\displaystyle P_{0}} taken to be the pressure at the ocean surface. The corresponding potential density anomaly is denoted by σ θ = ρ θ − 1000 {\displaystyle \sigma _{\theta }=\rho _{\theta }-1000} kg/m3. Because the compressibility of seawater varies with salinity and temperature, the reference pressure must chosen to be near the actual pressure to keep the definition of potential density dynamically meaningful. Reference pressures are often chosen as a whole multiple of 100 bar; for water near a pressure of 400 bar (40 MPa), say, the reference pressure 400 bar would be used, and the potential density anomaly symbol would be written σ 4 {\displaystyle \sigma _{4}} . Surfaces of constant potential density (relative to and in the vicinity of a given reference pressure) are used in the analyses of ocean data and to construct models of ocean currents. Neutral density surfaces, defined using another variable called neutral density ( γ n {\displaystyle \gamma ^{n}} ), can be considered the continuous analog of these potential density surfaces.

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