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aa

aa   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Volcanic **lava rock that is thick and porous and has a rough, jagged surface when it cools. It

abandoned well

abandoned well   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Any *well that has not been used for a long time and/or is not properly sealed, and is so

abatement

abatement   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The elimination or reduction of emissions that create *pollution. Examples include smoke abatement and noise abatement.

abatement debris

abatement debris   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Waste materials produced by *remediation activities.

Abbey, Edward

Abbey, Edward (1927–89)   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

who wrote the book *Desert Solitaire and is remembered for his strong criticism of public land policies and his

abiotic

abiotic   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Devoid of life, not *biotic, non‐biological. That part of a natural environment that comprises only chemical or physical

ablation

ablation   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

1. The process by which *snow or *ice is lost from a *glacier or *ice cap

ablation

ablation   Quick reference

A Dictionary of Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2008

The removal of surface snow or ice by sublimation, melting, or evaporation. The term is sometimes extended to

ablation zone

ablation zone   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The lower part of a *glacier, where in the course of a year more ice is lost by

ablation zone

ablation zone   Quick reference

A Dictionary of Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2008

The zone of a glacier in which losses through various processes, such as calving, deflation, melting, etc., exceed any

abrasion

abrasion   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The *physical weathering or mechanical weathering of rock or sediment by running water, glaciers, or wind loaded with fine

abroholos

abroholos   Quick reference

A Dictionary of Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2008

A violent squall, particularly prevalent in summer, that occurs off the south-eastern coast of Brazil.

absolute age

absolute age   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

Age that is expressed in number of years, rather than age relative to a particular event. In geology absolute age

absolute chronology

absolute chronology   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A *chronology that determines the age of a feature or event in years. Contrast relative chronology.

absolute dating

absolute dating   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A range of methods for determining the *absolute age of an object or material, for example using *radiometric

absolute humidity

absolute humidity   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

A measure of *humidity, or the actual mass of *water vapour in a given volume of air,

absolute humidity

absolute humidity   Quick reference

A Dictionary of Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2008

The amount of water vapour in air, determined as the mass of vapour per unit mass of air, and normally

absolute instability

absolute instability   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

The meteorological condition in which a rising *parcel of air continues to rise because the *dry adiabatic lapse

absolute instability

absolute instability   Quick reference

A Dictionary of Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2008

The state of a column of air that has a lapse rate that everywhere exceeds the dry adiabatic lapse rate

absolute poverty

absolute poverty   Quick reference

A Dictionary of Environment and Conservation (3 ed.)

Reference type:
Subject Reference
Current Version:
2017

An extreme state of *poverty, in which the standard of living is below the minimum that is needed

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