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A-tents

A-tents   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
Raised rock slabs or plates of varying thickness, mostly resulting from the buckling of laminae, plates, and slabs. These forms are generally cracked by tectonic activity, although ... More
abiotic

abiotic   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

Not living, non-biological, usually describing factors in an ecosystem: atmospheric gases, humidity, salinity, soil mineral particles, water, and so on. An ...

ablation

ablation   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
Loss of snow and ice from a glacier by *sublimation, melting, and evaporation; and from the *calving of icebergs, and avalanches. In temperate and subpolar regions melting is the major ... More
aborigine

aborigine   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

A member of an indigenous people existing in a land before invasion or colonization from outside. For Canadian aboriginal peoples, see ...

abrasion

abrasion   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

Also known as corrasion, this is the grinding away of bedrock by fragments of rock which may be incorporated in ice (...

absolute humidity

absolute humidity   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
The density of the water vapour present in a mixture of air and water vapour. Cold air cannot contain as much water vapour as warm air, so has a lower absolute humidity than warm air. Low ... More
absolute plate motion

absolute plate motion   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

The movement of a crustal plate in relation to a fixed point, such as a hot spot, or latitude and longitude....

abstraction

abstraction   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

The selection and conceptualization of a phenomenon, or some aspect of it; a way of viewing a real world object, usually a simplification—such as a ...

abundance

abundance   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
The total number of individuals of a certain species present in an area, generally estimated by sampling methods (such as capture–recapture), and which may vary according to competition, ... More
abyssal

abyssal   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
Of or belonging to the ocean depths, especially below 2000 m. The abyssopelagic zone is that part of deep lakes, oceans, or seas characterized by specific forms of plankton and nekton ... More
accelerator

accelerator   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

A factor which increases the momentum of a boom or slump in an economy, so that a small change in demand, for example, may lead to a greater industrial growth (or decline)....

access

access   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
Connection or entry to a service. A. Sen (1999) measures access to advantage by one’s access to basic needs: satisfying goods—like food; freedoms—as in a labour market; and capabilities. ... More
accessibility

accessibility   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
The ease of approach to one location from other locations: in terms of the distance travelled, the cost of travel, or the time taken. The improvement of infrastructures produces an ... More
accordant

accordant   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

Complying with; thus, accordant drainage has evolved in conformity with the underlying geological structure: domes show a radial pattern, for example. The ...

accretion

accretion   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

1 The growth of land by the offshore deposition of sediment, forming *spits and *tombolos. Accretion is most active in ...

acculturation

acculturation   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
The adaptation to, and adoption of, a new culture. This may occur simultaneously as two cultures meet, but occurs more often as an immigrant group takes to the behaviour patterns and ... More
accumulated temperature

accumulated temperature   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
One of the key factors for crop growth, this is the length of time, from a specific date, for which mean daily temperatures have been above, or below, a stated temperature; the total time ... More
accumulation

accumulation   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

1 The input of ice to a glacier. Weaver (1975) Arct. & Alpine Res. 7, 3 suggests that it is greatest in shaded uplands. The ...

Acid Rain

Acid Rain   Reference library

Encyclopedia of Climate and Weather (2 ed.)

Reference type:
Subject Reference
Current Version:
2011

The relationships between chemical emissions into the atmosphere and the effects of these chemicals on various ecosystems, human health, and

acidification

acidification   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015
A soil-forming process whereby organic acids (from humus) increase hydrogen ion concentration, as in the transformation of *brown-earth soils into acid brown earth, in humid temperate ... More

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