Definitions - a

Abrupt Climate Change

A shift in climate (e.g., temperature or precipitation) that occurs faster than the rate of change in the mechanism causing the change.

Search the Web for Abrupt Climate Change
Absorption Lines

Any portion of the electromagnetic spectrum (including visible light) that is trapped by free atoms or molecules in the path of the radiation,so  reducing their transmission. In the climate context, this is important for the greenhouse effect since water vapor, carbon dioxide and methane absorb certain wavelengths of infrared radiation.

Search the Web for Absorption Lines
Acid Fallout

Molecules of acid formed from reactions high in the atmosphere involving nitrogen, sulfur oxides, and water vapor that settle out of the atmosphere without any additional water.

Search the Web for Acid Fallout
Acid Free

Acid Free is used to describe paper which is free from traces of acid; e.g. made under neutral sizing conditions. This helps improve its longevity.

Search the Web for Acid Free
Acid Rain

Rainwater that has an acidity content greater than the postulated natural pH of about 5.6. It is formed when sulfur dioxides and nitrogen oxides, as gases or fine particles in the atmosphere, combine with water vapor and precipitate as sulfuric acid or nitric acid in rain, snow, or fog. The dry forms are acidic gases or particulates.

Search the Web for Acid Rain
Activated Coal

This is the most commonly used adsorption medium, produced by heating carbonaceous substances or cellulose bases in the absence of air. It has a very porous structure and is commonly used to remove organic matter and dissolved gases from water. Its appearance is similar to coal or peat. Available in granular, powder or block form; in powder form it has the highest adsorption capacity.

Search the Web for Activated Coal
Activated Sludge Process

A biological wastewater treatment process in which a mixture of waste water and activated sludge is agitated and aerated. The activated sludge is then separated from the treated wastewater by sedimentation and disposed of or returned to the process as needed.

Search the Web for Activated Sludge Process
Active Ventilation

Active Ventilation is forced air ventilation, this is where a fan is used to move air into a space or room to provide ventilation.

Search the Web for Active Ventilation
Adaptive Capacity

The ability of a system (like an ecosystem) to adapt to climate change or other environmental disturbances. This may mean moderating potential damages, taking advantage of opportunities or coping with the consequences.

In discussions on global warming adaptive capacity often refers to a country. In this case it is currently much lower in developing countries, consequential to poverty.

Search the Web for Adaptive Capacity
Advection

The horizontal movement of heat energy. A warm breeze through a relatively cool orchard, for instance.

Search the Web for Advection
Aerated Lagoon

A water treatment pond that speeds up biological decomposition of organic waste by stimulating the growth and activity of bacteria, which are responsible for the degradation.

Search the Web for Aerated Lagoon
Aeroplankton

Tiny organisms living in the atmosphere. Certain small seeds, bacteria, and spores are examples.

Search the Web for Aeroplankton
Aerosol

Particulate matter, solid or liquid, larger than a molecule but small enough to remain suspended in the atmosphere.

Search the Web for Aerosol
Affluenza

A term coined by Australian writer Clive Hamilton to describe a society where the pursuit of material wealth has led to a lower quality of life with more unhappiness, depression and mental illness due to lack of community and the pressure to get rich.

Search the Web for Affluenza
Afforestations

A shift in climate (e.g., temperature or precipitation) that occurs faster than the rate of change in the mechanism causing the change.

Search the Web for Afforestations
Agribusiness

A business that markets farm products and equipment, including warehousing, seed monopolization, and fertilizer. The corporatization of farming, resulting in a handful of very large non-local companies owning and managing--and in some cases ruining--millions of high-yield acres

Search the Web for Agribusiness
Agroforestry

A shift in climate (e.g., temperature or precipitation) that occurs faster than the rate of change in the mechanism causing the change.

Search the Web for Agroforestry
Air Barrier

A shift in climate (e.g., temperature or precipitation) that occurs faster than the rate of change in the mechanism causing the change.

Search the Web for Air Barrier
Air Pollution

A cell producing an electric current direct from a chemical reaction.

Search the Web for Air Pollution
Air Sealing

A cell producing an electric current direct from a chemical reaction.

Search the Web for Air Sealing
Air Stratification

A cell producing an electric current direct from a chemical reaction.

Search the Web for Air Stratification
Airshed

A cell producing an electric current direct from a chemical reaction.

Search the Web for Airshed
Albedo

A cell producing an electric current direct from a chemical reaction.

Search the Web for Albedo
Albedo

A cell producing an electric current direct from a chemical reaction.

Search the Web for Albedo
Alcohol Fuels

A cell producing an electric current direct from a chemical reaction.

Search the Web for Alcohol Fuels
Aldehydes

A cell producing an electric current direct from a chemical reaction.

Search the Web for Aldehydes
Allelopathy

A cell producing an electric current direct from a chemical reaction.

Search the Web for Allelopathy
Allochthonous

A cell producing an electric current direct from a chemical reaction.

Search the Web for Allochthonous
Alpaca
Alpaca

A cell producing an electric current direct from a chemical reaction.

Search the Web for Alpaca
Alternative Energy

A cell producing an electric current direct from a chemical reaction.

Search the Web for Alternative Energy
Alternative Energy

A cell producing an electric current direct from a chemical reaction.

Search the Web for Alternative Energy
Alternative Fuels

A cell producing an electric current direct from a chemical reaction.

Search the Web for Alternative Fuels
Ambient Temperature

A cell producing an electric current direct from a chemical reaction.

Search the Web for Ambient Temperature
Ammonia

A cell producing an electric current direct from a chemical reaction.

Search the Web for Ammonia
Anaerobic Digestor

A cell producing an electric current direct from a chemical reaction.

Search the Web for Anaerobic Digestor
Angle Of Attack

A cell producing an electric current direct from a chemical reaction.

Search the Web for Angle Of Attack
Angle Of Incidence

A cell producing an electric current direct from a chemical reaction.

Search the Web for Angle Of Incidence
Angle Of Repose

A cell producing an electric current direct from a chemical reaction.

Search the Web for Angle Of Repose
Annual Solar Savings

A cell producing an electric current direct from a chemical reaction.

Search the Web for Annual Solar Savings
Anomaly

A cell producing an electric current direct from a chemical reaction.

Search the Web for Anomaly
Antagonistic Effect

A cell producing an electric current direct from a chemical reaction.

Search the Web for Antagonistic Effect
Anthracite

A cell producing an electric current direct from a chemical reaction.

Search the Web for Anthracite
Anthropogenic

A cell producing an electric current direct from a chemical reaction.

Search the Web for Anthropogenic
Anthropogenic Global Warming

A cell producing an electric current direct from a chemical reaction.

Search the Web for Anthropogenic Global Warming
Anthroposophy

A cell producing an electric current direct from a chemical reaction.

Search the Web for Anthroposophy
Aquaculture

A cell producing an electric current direct from a chemical reaction.

Search the Web for Aquaculture
Aquiclude

A cell producing an electric current direct from a chemical reaction.

Search the Web for Aquiclude
Aquifer

A cell producing an electric current direct from a chemical reaction.

Search the Web for Aquifer
Arcology

A cell producing an electric current direct from a chemical reaction.

Search the Web for Arcology
Artesian

A cell producing an electric current direct from a chemical reaction.

Search the Web for Artesian
Artic Treeline

A cell producing an electric current direct from a chemical reaction.

Search the Web for Artic Treeline
Artificial Trees

A cell producing an electric current direct from a chemical reaction.

Search the Web for Artificial Trees
Asbestos

A cell producing an electric current direct from a chemical reaction.

Search the Web for Asbestos
Asbestosis

A cell producing an electric current direct from a chemical reaction.

Search the Web for Asbestosis
Atmospheric Circulation Model

A cell producing an electric current direct from a chemical reaction.

Search the Web for Atmospheric Circulation Model
Atmospheric Concentrations

A cell producing an electric current direct from a chemical reaction.

Search the Web for Atmospheric Concentrations
Atoll

A cell producing an electric current direct from a chemical reaction.

Search the Web for Atoll
Autoconvection

A cell producing an electric current direct from a chemical reaction.

Search the Web for Autoconvection
Autotrophn

A cell producing an electric current direct from a chemical reaction.

Search the Web for Autotrophn
Availability Factor

A cell producing an electric current direct from a chemical reaction.

Search the Web for Availability Factor
Available Heat

A cell producing an electric current direct from a chemical reaction.

Search the Web for Available Heat
Avoided Cost

A cell producing an electric current direct from a chemical reaction.

Search the Web for Avoided Cost
Axial Alternator

A cell producing an electric current direct from a chemical reaction.

Search the Web for Axial Alternator
Azimuth Angle

A cell producing an electric current direct from a chemical reaction.

Search the Web for Azimuth Angle

Click on a letter to see all the terms and definitions that begin with that letter.

A free Android app containing all these definitions is now available, called the Green Dictionary. Click here to see the entry on the Android market; or click here if on an Android phone.