Science and Development Network
News, views and information about science, technology and the developing world
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Definitions
- Antibiotic resistance
- Bird flu
- Climate change & insect-borne disease
- Genomics
- Malaria
- Nanotechnology for health
- Tuberculosis
Below is a directory of terms used in the debate about climate change and insect-borne disease. Most of the terms have been reproduced from the WHO, US Environment Protection Agency, the UN University Institute of Advanced Studies, the Center for International Forestry Research, and the Meridian Institute.
C
Carbon Dioxide (CO2)
The greenhouse gas whose concentration is being most affected directly by human activities. Carbon dioxide also serves as the reference to compare all other greenhouse gases (see carbon dioxide equivalents). The major source of carbon dioxide emissions is fossil fuel combustion. Carbon dioxide emissions are also a product of forest clearing, biomass burning, and non-energy production processes such as cement production. Atmospheric concentrations of carbon dioxide have been increasing at a rate of about 0.5 per cent per year, and are now about 30 per cent above pre-industrial levels.
Climate
Usually defined as the 'average weather'. More rigorously it is the statistical description of the mean and variability of factors such as temperature, precipitation and wind over a period of time ranging from months to thousands or millions of years.
Climate Change
(Also referred to as 'global climate change'). This term is sometimes used to refer to all forms of climatic inconsistency, But as the Earth's climate is never static, the term is more properly used to imply a significant change from one climatic condition to another. In some cases, ‘climate change' has been used synonymously with the term, 'global warming'. Scientists, however, tend to use the term in the wider sense to also include natural changes in climate.
Climate variability
Variations in the mean and other statistics (standard deviation and outliers for example) of the climate on all temporal and spatial scales beyond individual weather events. Variability may be due to natural internal processes within the climate system or to variations in natural or anthropogenic external forces.
