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aerosol

aerosol  

A suspension of droplets or particles in a gas; more precisely, of particles with a maximum diameter of 1 μm (fog and mist are thus aerosols). In meteorology, the term is often used to describe the ...
andhi

andhi  

Local term, used in the north-west of the Indian subcontinent, for dust storms accompanying violent squalls, caused by strong convection.
anthropogeomorphology

anthropogeomorphology  

The study of those land-forms and processes that are a direct result of human activity, including accelerated erosion, channelized river channels (i.e. rivers made to flow along fixed, sometimes ...
arid climate

arid climate  

A climate where rainfall is insufficient to support appreciable amounts of vegetation. Arid climates occur in regions subject to persistent high pressure, such as those beneath the subtropical ...
blowing dust/sand

blowing dust/sand  

A term used in synoptic meteorology to indicate that dust or sand is being transported by the wind, at heights greater than 1.5 m, but that visibility is greater than 1 000 m. See drifting dust/sand; ...
Depletion and Restoration of The Ogallala Aquifer

Depletion and Restoration of The Ogallala Aquifer  

[This case study focuses on the history of this crucial supply of ground water and on the increasing risk and consequences of its depletion.]The Ogallala Aquifer, the dominant geologic ...
desert

desert  

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A major terrestrial biome characterized by low rainfall. Hot deserts, such as the Sahara and Kalahari deserts of Africa, have a rainfall of less than 25 cm a year and extremely high daytime ...
desertification

desertification  

The spread of desert-like conditions, particularly in arid or semi-arid areas, due to the influence of human activity and climatic change.
dust

dust  

Solid particles, the size of clay and silt particles (see particle size), that can be raised and carried by the wind.
dust devil

dust devil  

Very localized whirlwind in a desert area, where strong convection uplifts dust and sand often to a height of a few tens of metres.
erosion

erosion  

1 The part of the overall process of denudation that includes the physical breaking down, chemical solution and transportation of material.2 Movement of soil and rock material by agents such as ...
gust front

gust front  

An outflow of cool air from the leading edge of a cumulonimbus cloud. There may be strong gusts of wind, but no precipitation is present.
haboob

haboob  

A dust storm or sandstorm that is caused by cold downdrafts from a thunderstorm which turbulently lift dust and sand into the air. The term is mostly used in connection with the Sudan.
paleoclimate

paleoclimate  

The climate of a particular period in the geological past, before historical records or instrumental observations. Palaeoclimatology uses evidence from glaciers and ice sheets, geology, sediments, ...
sandstorm

sandstorm  

Phenomenon in which sand and dust particles are uplifted, often to great altitude, by turbulent winds. Visibility is greatly reduced.
storm

storm  

Common term for gales, squalls, rainstorms, or thunderstorms. It is used specifically for conditions associated with the active areas of low-pressure systems. ‘Storm-force winds’ are, by definition, ...

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