Difference between revisions of "Extreme Weather Event (EWE)"
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| − | {{definition|Extreme weather event (or extreme event) is any weather situation that occurs extremely rarely at a given place at this time of year is an extreme weather event. <ref>[http://www.germany.info/contentblob/2293498/Daten/426241/Adaptation_DD.pdf Combating Climate Change: The German Adaptation Strategy]</ref>}}If extreme weather persists for a long period of time, it may be classified as an “extreme climate event”. | + | {{definition|Extreme weather event (or extreme event) is any weather situation that occurs extremely rarely at a given place at this time of year is an extreme weather event. <ref>[http://www.germany.info/contentblob/2293498/Daten/426241/Adaptation_DD.pdf Combating Climate Change: The German Adaptation Strategy]</ref>}}If extreme weather persists for a long period of time, it may be classified as an “extreme climate event”.<br /><br/> |
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==== [[United Kingdom]]==== | ==== [[United Kingdom]]==== | ||
{{definition|Extreme weather includes unusual, severe or unseasonal weather; or weather at the extremes of the range of weather seen in the past. <ref>[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/209866/pb13942-nap-20130701.pdf The National Adaptation Programme: Making the country resilient to a changing climate, UK Government (2013)]</ref>}}<br /><br/> | {{definition|Extreme weather includes unusual, severe or unseasonal weather; or weather at the extremes of the range of weather seen in the past. <ref>[https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/209866/pb13942-nap-20130701.pdf The National Adaptation Programme: Making the country resilient to a changing climate, UK Government (2013)]</ref>}}<br /><br/> | ||
Revision as of 01:23, 20 November 2016
A subset of "Hazard" and "Threat" to CI comprise Extreme Weather Events (EWE) which causes a CI disruption or, even more often, a Common Cause Failure of multiple CI.
EWE comprise:
- long duration drought
- extreme precipitation in a short period of time (e.g., flash floods, water bombs)
- (extreme) cold wave / cold snaps / ice & snow storms
- (extreme) heat wave
- extreme wind (hurricanes, tornadoes, Derecho, etc.)
Contents
Definitions
International Definitions
IPCC
Definitions of rare vary, but an extreme weather event would normally be as rare as or rarer than the 10th or 90th percentile
of a probability density function estimated from observations.
National Definitions
Australia
Definitions of rare vary, but an extreme weather event would normally be as rare as or rarer than the 10th or 90th percentile of a probability density function estimated from observations.
Moreover, Australia has defined severe weather:
Severe weather is often associated with extreme convective weather (tropical cyclones, tornadoes, severe
thunderstorms, squalls, etc.) and with storms of freezing precipitation or blizzard conditions.
Germany
If extreme weather persists for a long period of time, it may be classified as an “extreme climate event”.
United Kingdom
United States
NOAA
The U.S. National Oceanic and Atmospheric Administration (NOAA) uses a definition of extreme weather based on an event's climatologically-expected distribution. An event is called extreme if occurs, for example, only five per cent or less of the time. NOAA notes, however, that the exact choice of cut-off of the climatologically probability value used in the definition is somewhat arbitrary. A simple example of extreme weather is therefore when the temperature drops to a level which occurs less than five per cent of the time, say below -20 C. Extreme events, by definition, are rare.
Standard Definition
Discussion
See also
Notes
- ↑ Mach, K.J., S. Planton and C. von Stechow (eds.). Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Annex II: Glossary. [Core Writing Team, R.K. Pachauri and L.A. Meyer (eds.)]. IPCC, Geneva, Switzerland, pp. 117-130.
- ↑ Australian climate change glossary
- ↑ Australian Emergency Management Glossary, Emergency Management Australia (1998)
- ↑ Combating Climate Change: The German Adaptation Strategy
- ↑ The National Adaptation Programme: Making the country resilient to a changing climate, UK Government (2013)
