Concept information
Término preferido
Arctic Oscillation
Definición
- The Arctic oscillation (AO) or Northern Annular Mode/Northern Hemisphere Annular Mode (NAM) is a weather phenomenon at the Arctic pole north of 20 degrees latitude. It is an important mode of climate variability for the Northern Hemisphere. The southern hemisphere analogue is called the Antarctic oscillation or Southern Annular Mode (SAM). The index varies over time with no particular periodicity, and is characterized by non-seasonal sea-level pressure anomalies of one sign in the Arctic, balanced by anomalies of opposite sign centered at about 37–45° N. The North Atlantic oscillation (NAO) is a close relative of the Arctic oscillation. There is debate over whether one or the other is more fundamentally representative of the atmosphere's dynamics. The NAO may be identified in a more physically meaningful way, which may carry more impact on measurable effects of changes in the atmosphere. (Adapted from: https://en.wikipedia.org/wiki/Arctic_oscillation)
Concepto genérico
etiqueta alternativa (skos)
- AO
- NAM
- Northern Annular Mode
- Northern Hemisphere Annular Mode
En otras lenguas
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francés
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OA
URI
http://data.loterre.fr/ark:/67375/QX8-9XGX914F-N
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