Area density, the Glossary

Table of Contents

1. 41 relations: Absorption (electromagnetic radiation), Accretion disk, Advanced microwave sounding unit, Aqua (satellite), Area, Atmospheric physics, Body mass index, Bone density, Chemical substance, Density, Differential optical absorption spectroscopy, Dimensionless quantity, Extinction (astronomy), Grammage, Hard disk drive, Hydrogen line, Integral, Kilogram, Line of sight, Line-of-sight propagation, Linear density, Liquid water path, Mass, Microwave, Nadir, Number density, Optical depth, Optical disc, Ounce, Paper density, Particle number, Radiometer, Remote sensing, SI derived unit, Snow science, Specific quantity, Square metre, Tape drive, Total electron content, Total Ozone Mapping Spectrometer, Units of paper quantity.

2. Area-specific quantities
3. Atmospheric physics
4. Mass density

Absorption (electromagnetic radiation)

In physics, absorption of electromagnetic radiation is how matter (typically electrons bound in atoms) takes up a photon's energy — and so transforms electromagnetic energy into internal energy of the absorber (for example, thermal energy).

See Area density and Absorption (electromagnetic radiation)

Accretion disk

An accretion disk is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a massive central body.

See Area density and Accretion disk

Advanced microwave sounding unit

The advanced microwave sounding unit (AMSU) is a multi-channel microwave radiometer installed on meteorological satellites.

See Area density and Advanced microwave sounding unit

Aqua (satellite)

Aqua (EOS PM-1) is a NASA scientific research satellite in orbit around the Earth, studying the precipitation, evaporation, and cycling of water.

See Area density and Aqua (satellite)

Area

Area is the measure of a region's size on a surface.

See Area density and Area

Atmospheric physics

Within the atmospheric sciences, atmospheric physics is the application of physics to the study of the atmosphere.

See Area density and Atmospheric physics

Body mass index

Body mass index (BMI) is a value derived from the mass (weight) and height of a person.

See Area density and Body mass index

Bone density

Bone density, or bone mineral density, is the amount of bone mineral in bone tissue. Area density and bone density are mass density.

See Area density and Bone density

Chemical substance

A chemical substance is a unique form of matter with constant chemical composition and characteristic properties.

See Area density and Chemical substance

Density

Density (volumetric mass density or specific mass) is a substance's mass per unit of volume. Area density and density are mass density.

See Area density and Density

Differential optical absorption spectroscopy

In atmospheric chemistry, differential optical absorption spectroscopy (DOAS) is used to measure concentrations of trace gases.

See Area density and Differential optical absorption spectroscopy

Dimensionless quantity

Dimensionless quantities, or quantities of dimension one, are quantities implicitly defined in a manner that prevents their aggregation into units of measurement.

See Area density and Dimensionless quantity

Extinction (astronomy)

In astronomy, extinction is the absorption and scattering of electromagnetic radiation by dust and gas between an emitting astronomical object and the observer.

See Area density and Extinction (astronomy)

Grammage

Grammage and basis weight, in the pulp and paper industry, are the area density of a paper product, that is, its mass per unit of area.

See Area density and Grammage

Hard disk drive

A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material.

See Area density and Hard disk drive

Hydrogen line

The hydrogen line, 21 centimeter line, or H I line is a spectral line that is created by a change in the energy state of solitary, electrically neutral hydrogen atoms.

See Area density and Hydrogen line

Integral

In mathematics, an integral is the continuous analog of a sum, which is used to calculate areas, volumes, and their generalizations.

See Area density and Integral

Kilogram

The kilogram (also kilogramme) is the base unit of mass in the International System of Units (SI), having the unit symbol kg.

See Area density and Kilogram

Line of sight

The line of sight, also known as visual axis or sightline (also sight line), is an imaginary line between a viewer/observer/spectator's eye(s) and a subject of interest, or their relative direction.

See Area density and Line of sight

Line-of-sight propagation

Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves can only travel in a direct visual path from the source to the receiver without obstacles.

See Area density and Line-of-sight propagation

Linear density

Linear density is the measure of a quantity of any characteristic value per unit of length.

See Area density and Linear density

Liquid water path

Liquid water path - in units of g/m2 is a measure of the total amount of liquid water present between two points in the atmosphere.

See Area density and Liquid water path

Mass

Mass is an intrinsic property of a body.

See Area density and Mass

Microwave

Microwave is a form of electromagnetic radiation with wavelengths shorter than other radio waves (as originally discovered) but longer than infrared waves.

See Area density and Microwave

Nadir

The nadir is the direction pointing directly below a particular location; that is, it is one of two vertical directions at a specified location, orthogonal to a horizontal flat surface.

See Area density and Nadir

Number density

The number density (symbol: n or ρN) is an intensive quantity used to describe the degree of concentration of countable objects (particles, molecules, phonons, cells, galaxies, etc.) in physical space: three-dimensional volumetric number density, two-dimensional areal number density, or one-dimensional linear number density.

See Area density and Number density

Optical depth

In physics, optical depth or optical thickness is the natural logarithm of the ratio of incident to transmitted radiant power through a material.

See Area density and Optical depth

Optical disc

An optical disc is a flat, usuallyNon-circular optical discs exist for fashion purposes; see shaped compact disc.

See Area density and Optical disc

Ounce

The ounce is any of several different units of mass, weight, or volume and is derived almost unchanged from the uncia, an Ancient Roman unit of measurement.

See Area density and Ounce

Paper density

Paper density is a paper product's mass per unit volume.

See Area density and Paper density

Particle number

In thermodynamics, the particle number (symbol) of a thermodynamic system is the number of constituent particles in that system.

See Area density and Particle number

Radiometer

A radiometer or roentgenometer is a device for measuring the radiant flux (power) of electromagnetic radiation.

See Area density and Radiometer

Remote sensing

Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object, in contrast to in situ or on-site observation.

See Area density and Remote sensing

SI derived unit

SI derived units are units of measurement derived from the seven SI base units specified by the International System of Units (SI).

See Area density and SI derived unit

Snow science

Snow science addresses how snow forms, its distribution, and processes affecting how snowpacks change over time.

See Area density and Snow science

Specific quantity

In the natural sciences, including physiology and engineering, a specific quantity generally refers to an intensive quantity obtained by the ratio of an extensive quantity of interest by another extensive quantity (usually mass or volume).

See Area density and Specific quantity

Square metre

The square metre (international spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the unit of area in the International System of Units (SI) with symbol m2.

See Area density and Square metre

Tape drive

A tape drive is a data storage device that reads and writes data on a magnetic tape.

See Area density and Tape drive

Total electron content

Total electron content (TEC) is an important descriptive quantity for the ionosphere of the Earth.

See Area density and Total electron content

Total Ozone Mapping Spectrometer

The Total Ozone Mapping Spectrometer (TOMS) was a NASA satellite instrument, specifically a spectrometer, for measuring the ozone layer.

See Area density and Total Ozone Mapping Spectrometer

Units of paper quantity

Various measures of paper quantity have been and are in use.

See Area density and Units of paper quantity

See also

Area-specific quantities

• Area density
• Current density
• Sales per unit area
• Surface energy
• Surface power density

Atmospheric physics

• Aeronomy
• Aethrioscope
• Area density
• Atmospheric physics
• Atmospheric sounding
• Millán Millán
• Space weather

Mass density

• Area density
• Bone density
• Bulk density
• Density
• Density of air
• Heavy liquid
• Lifting gas
• Mass concentration (chemistry)
• Maximum density
• Neutral buoyancy
• Nuclear density
• Orthobaric density
• Partial specific volume
• Particle mass density
• Relative density
• Stratified flows

References

[1] https://en.wikipedia.org/wiki/Area_density

Also known as Areal densities, Areal density, Column Mass Density, Column density, Columnar density, Columnar mass density, Mass thickness, Oblique column density, Surface density, Surface mass density, Total column, Vertical column density.