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acid precipitation

acid precipitation  

(mist, fog, rain) Syn: acid deposition. Atmospheric acid aerosols are removed by wet deposition (rain, snow, mist, fog) or dry deposition of particles on vegetation. This is harmful to aquatic and ...
air

air  

1 A mixture of gases that makes up the Earth's atmosphere. It comprises about 78% nitrogen, 21% oxygen, less than 1% of carbon dioxide and other gases, and varying amounts of water vapour that humans ...
air Quality

air Quality  

A general term that describes the condition of the air in a particular place and time, reflecting the degree to which it is pollution‐free (particularly in terms of sulphur dioxide, nitrogen oxides, ...
albedo

albedo  

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Reflectivity, indexed by the proportion of incident light that an object reflects. [From Latin albedo whiteness, from albus white]
Antarctica

Antarctica  

The fifth largest and by far the coldest of the seven continents. It is centred on the South Pole, located mostly within the Antarctic Circle, covered with ice (which in places is more than 2000 ...
Aqua

Aqua  

A NASA polar-orbiting satellite, part of the Earth Observing System, the second to be launched (after the Terra satellite) on 4 May 2002. It is primarily designed to monitor the Earth's hydrological ...
atmospheric chemistry

atmospheric chemistry  

The study of the chemical composition of the atmosphere, of aerosols, pollutants, and rainfall, and the various chemical reactions in which they are involved. It includes the processes of ...
Aura

Aura  

A NASA polar-orbiting satellite, part of the Earth Observing System, the third to be launched (after the Terra and Aqua satellites). Its principal mission is to monitor atmospheric chemistry and ...
ball lightning

ball lightning  

A luminous sphere that sometimes appears at ground level in a thunderstorm. Ball lightning is slow moving and usually disappears without detonation. The spheres vary in diameter up to a few metres. ...
Calipso

Calipso  

The Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation satellite is a joint project by NASA and the French Centre National d’Études Spatiales (CNES) to study the role that clouds ...
clear-air turbulence

clear-air turbulence  

(CAT)The variable pattern of up- and down-draughts, or turbulence, sometimes occurring in the absence of any cloud. It is caused by strong wind shear, especially associated with jet streams in the ...
climate change

climate change  

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Subject:
History
The change in world climate patterns over time. Such change has always occurred, both on a large scale since the formation of the earth and on a smaller scale within the span of human history. For ...
Climate Reconstruction

Climate Reconstruction  

Our knowledge of climate history prior to the availability of instrumental records comes from two main sources: (1) historical observations, where information on past climatic conditions is contained ...
cloud

cloud  

A visible, dense mass of water droplets and/or ice crystals, suspended in the air, and generally forming when air is forced to rise: at a front, over mountains, or because of convection. Clouds ...
coal

coal  

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Carbon-rich mineral deposit formed from the remains of fossil plants. These are deposited initially as peat, but burial and increase in temperatures at depth bring about physical and chemical ...
colloid

colloid  

1 A substance that is composed of two homogeneous phases, one of which is dispersed in the other.2 (pedol.) Soil colloids are substances of very small particle size, either mineral (e.g. clay) or ...
cosmic radiation

cosmic radiation  

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A variety of high‐energy particles (mainly protons (92%) and alpha particles (6%) ) that bombard the Earth from outer space.
deposit gauge

deposit gauge  

Device for collecting solid and liquid atmospheric pollutants.
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.
Detection and Attribution of Climate Change

Detection and Attribution of Climate Change  

The goal of detection and attribution is to determine what caused an observed change in climate. Trends and changes in climate can be caused by natural variability of the climate ...

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