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Displaying 45 of about 339 resultsA snow storm is a meteorological disturbance giving rise to a heavy fall of snow, often accompanied by strong winds (WMO, 1992).
An extra-tropical cyclone is a low-pressure system which develops in latitudes outside the tropics (WMO, 1992).
A depression or cyclone is a region of the atmosphere in which the pressures are lower than those of the surrounding region at the same level (WMO, 1992).
A storm surge reflects the difference between the actual water level under the influence of a meteorological disturbance (storm tide) and the level which would have occurred in the absence of the meteorological disturbance (i.e., astronomical tide) (WMO, 2008, 2011, 2017).
Seiches are sea-level oscillations at the resonant frequency of enclosed bodies of water (WMO, 2011).
Polluted air is air containing dust, smoke, micro-organisms or gases different from those from which it would normally be composed (WMO, 1992).Alternative definition: Polluted air is air which contains gases and particles emitted to the atmosphere by a variety of human activities and natural sources, or formed in the atmosphere, that at critical levels…
A ‘glacial lake outburst flood’ is a phrase used to describe a sudden release of a significant amount of water retained in a glacial lake, irrespective of the cause (Emmer, 2017).
A snowmelt flood is a significant flood rise in a river caused by the melting of snowpack accumulated during the winter (WMO, 2012).
Coastal flooding is most frequently the result of storm surges and high winds coinciding with high tides. The surge itself is the result of the raising of sea levels due to low atmospheric pressure. In particular configurations, such as major estuaries or confined sea areas, the piling up of water is amplified by a combination of the shallowing of the s…
A thunderstorm is defined as one or more sudden electrical discharges, manifested by a flash of light (lightning) and a sharp or rumbling sound (thunder) (WMO, no date).
A submarine landslide is a downslope movement of sediment or rock under the effect of gravity, which occurs when the stresses acting downslope exceed the available strength of the sediment on the slope (Lee et al., 2007).
Malware is a summary term for different forms of malevolent software designed to infiltrate and infect computers, typically without the knowledge of the owner (ITU, 2008).
Conformity assessment: activity that provides demonstration that specified requirements relating to a product, process, system, person or body are fulfilled (NIST Information Technology Laboratory, no date).For the purposes of this standard, interoperability allows any government facility or information system, regardless of the personal Identity verifi…
Dam failure is the collapse or movement of part of a dam or its foundation, such that the dam cannot retain water. In general, a failure results in a release of large quantities of water imposing risks on the people or property downstream (ICOLD, 2015).
A building high-rise cladding fire hazard occurs when combustible materials such as cladding on a high-rise building greatly increases risk in the event of a fire and can have a catastrophic outcome (adapted from Rockpanel, no date)