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Derry City and Strabane District CouncilClimate Change Adaptation Plan 2020-2025

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Glossary<br />

Emissions Scenarios<br />

A range of scenarios representing the potential future<br />

greenhouse gas emissions based on human activities including<br />

mitigation. They are presented as Representative Concentration<br />

Pathways (RCP) ranging from no/low mitigation -RCP8.5 to<br />

transformational societal change <strong>and</strong> reduction in emissions -<br />

RCP2.6.<br />

External Forcing<br />

External forcing refers to a forcing agent outside the climate<br />

system causing a change e.g. Volcanic eruptions, solar<br />

variations <strong>and</strong> anthropogenic (Human driven) changes in the<br />

composition of the atmosphere <strong>and</strong> l<strong>and</strong>-use.<br />

Extreme Weather Event<br />

A rare weather event at a particular place <strong>and</strong> time of year.<br />

Flooding<br />

Flooding is the inundation of l<strong>and</strong> that is normally dry from one<br />

of several causes:<br />

Fluvial - river floods<br />

Pluvial - surface water run-off due to large quantities of<br />

rain in a short time<br />

Coastal flooding - flooding from high sea levels, this can<br />

be through a combination of high sea levels <strong>and</strong> storms.<br />

Groundwater - rising levels of subterranean water<br />

Sewerage - caused by blocked sewers.<br />

Global Warming<br />

The gradual increase, observed or projected, in global surface<br />

temperature.<br />

Green Infrastructure<br />

Interconnected network of multi-functional green <strong>and</strong> blue<br />

spaces, which provide multiple environmental, economic<br />

<strong>and</strong> social benefits, linked throughout the urban <strong>and</strong> rural<br />

l<strong>and</strong>scape.<br />

Grey Infrastructure is hard engineering assets, for example,<br />

transport, utilities <strong>and</strong> commercial infrastructure.<br />

Heatwave<br />

A continuous spell of unusually hot weather, where day<br />

temperatures reach at least 30°c <strong>and</strong> night times are a least<br />

15°c for at least 3 days.<br />

Impacts<br />

The effects of climate change on natural <strong>and</strong> human systems.<br />

Potential impacts are all impacts that may occur given a<br />

projected climate, without considering adaptation. Residual<br />

impacts are the impacts that would occur after adaptation.<br />

98<br />

DCSDC Climate <strong>Change</strong> <strong>Adaptation</strong> <strong>Plan</strong>

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