London scoping - ukcip

Final Report
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GQA General Quality Assessment
Greenhouse gas Gaseous constituents of the atmosphere, both natural and
anthropogenic, that absorb and emit radiation at specific
wavelengths within the spectrum of infrared radiation emitted by
the Earth’s surface, the atmosphere and clouds. The primary
greenhouse gases are water vapour (H2O), carbon dioxide (CO2),
nitrous oxide (N2O), methane (CH4), and ozone (O3).
Grid The co–ordinate system employed by GCM or RCM to compute
three–dimensional fields of atmospheric mass, energy flux,
momentum and water vapour. The grid spacing determines the
smallest features that can be realistically resolved by the model.
Typical resolutions for GCMs are 200 km, and for RCMs
20–50 km.
GOL Government Office for London
LCCP London Climate Change Partnership
NCEP The acronym for the National Centre for Environmental
Prediction. The source of re–analysis (climate model
assimilated) data widely used for dynamical and statistical
downscaling of the current climate.
Normalisation A statistical procedure involving the standardisation of a data set
(by subtraction of the mean and division by the standard
deviation) with respect to a predefined control period. The
technique is widely used in statistical downscaling to reduce
systematic biases in the mean and variance of climate model
output.
OFWAT The Office of Water Services, responsible for making sure that
the water sewerage companies in England and Wales give a good
quality, efficient service at a fair price. They are a government
department led by the Director General of Water Services.
Parameter A numerical value representing a process or attribute in a model.
Some parameters are readily measurable climate properties;
others are known to vary but are not specifically related to
measurable features. Parameters are also used in climate models
to represent processes that are poorly understood or resolved.
PPG25 Planning Guidance Note 25: - Local Planning Authorities are to
ensure that flood risk is properly taken into account in the
planning of developments to reduce the risk of flooding .
Predictand A variable that may be inferred through knowledge of the
behaviour of one or more predictor variables.