Arctic Oscillation

E504899

atmospheric circulation mode climate pattern

The Arctic Oscillation is a large-scale climate pattern characterized by opposing atmospheric pressure anomalies between the Arctic and mid-latitudes, strongly influencing weather and sea-ice conditions across the Northern Hemisphere.

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Observed surface forms (1)

Surface form	Occurrences
Arctic atmospheric circulation	1

Statements (47)

Predicate	Object
instanceOf	atmospheric circulation mode ⓘ climate pattern ⓘ
affects	Arctic weather ⓘ Northern Hemisphere climate ⓘ mid-latitude weather ⓘ precipitation patterns ⓘ sea ice conditions ⓘ storm tracks ⓘ temperature patterns ⓘ
alsoKnownAs	AO NERFINISHED ⓘ Northern Annular Mode NERFINISHED ⓘ
characterizedBy	opposing atmospheric pressure anomalies between Arctic and mid-latitudes ⓘ
consideredIn	long-range weather forecasting ⓘ seasonal climate prediction ⓘ
discoveredInContextOf	Northern Hemisphere sea-level pressure variability ⓘ
hasDomain	climatology ⓘ meteorology ⓘ
hasIndexComputationMethod	empirical orthogonal function analysis of sea-level pressure ⓘ
hasPhase	negative phase ⓘ positive phase ⓘ
influences	frequency of cold air outbreaks ⓘ jet stream position ⓘ jet stream strength ⓘ snowfall patterns in Eurasia ⓘ snowfall patterns in North America ⓘ storminess over North Atlantic ⓘ
linkedTo	Arctic sea ice variability ⓘ mid-latitude extreme weather events ⓘ polar vortex variability ⓘ stratosphere–troposphere coupling ⓘ
measuredBy	Arctic Oscillation index NERFINISHED ⓘ
negativePhaseDescription	higher-than-average pressure over Arctic and lower-than-average pressure over mid-latitudes ⓘ
negativePhaseImpact	increased likelihood of cold air outbreaks in mid-latitudes ⓘ weaker polar vortex ⓘ
positivePhaseDescription	lower-than-average pressure over Arctic and higher-than-average pressure over mid-latitudes ⓘ
positivePhaseImpact	milder winters in many mid-latitude regions ⓘ stronger polar vortex ⓘ
relatedTo	North Atlantic Oscillation NERFINISHED ⓘ Pacific–North American pattern NERFINISHED ⓘ
spatialExtent	Arctic region NERFINISHED ⓘ Northern Hemisphere NERFINISHED ⓘ
studiedUsing	climate models ⓘ reanalysis data ⓘ sea-level pressure observations ⓘ
temporalScale	decadal variability ⓘ interannual variability ⓘ intra-seasonal variability ⓘ

Referenced by (5)

Full triples — surface form annotated when it differs from this entity's canonical label.

Greenland Sea gyre → affectedBy → Arctic Oscillation ⓘ

Transpolar Drift Stream → isInfluencedBy → Arctic Oscillation ⓘ

Beaufort High → partOf → Arctic Oscillation ⓘ

this entity surface form: Arctic atmospheric circulation

Beaufort High atmospheric pressure system → relatedTo → Arctic Oscillation ⓘ

North Atlantic Oscillation → relatedTo → Arctic Oscillation ⓘ