NAO
E926139
NAO is a large-scale atmospheric pressure pattern over the North Atlantic that strongly influences weather and climate variability in Europe, North America, and surrounding regions.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| North Atlantic Oscillation | 0 |
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
atmospheric circulation pattern
ⓘ
climate variability mode ⓘ |
| abbreviation | NAO NERFINISHED ⓘ |
| affects |
North Atlantic storm frequency
ⓘ
ocean circulation in North Atlantic ⓘ river discharge in Europe ⓘ sea ice extent in the Arctic ⓘ |
| characterizedBy |
pressure difference between subtropical high and subpolar low
ⓘ
seesaw in atmospheric pressure ⓘ |
| discoveredBy | Sir Gilbert Walker NERFINISHED ⓘ |
| firstDescribedIn | early 20th century ⓘ |
| hasCenterOfAction |
Azores High
NERFINISHED
ⓘ
Icelandic Low NERFINISHED ⓘ |
| hasDomain |
climatology
ⓘ
meteorology ⓘ |
| hasPhase |
negative phase
ⓘ
positive phase ⓘ |
| influences |
climate variability
ⓘ
precipitation patterns ⓘ storm tracks ⓘ surface pressure distribution ⓘ temperature patterns ⓘ weather variability ⓘ |
| influencesRegion |
Arctic
NERFINISHED
ⓘ
Europe NERFINISHED ⓘ Mediterranean Basin NERFINISHED ⓘ North Africa NERFINISHED ⓘ North America NERFINISHED ⓘ |
| measuredBy | NAO index ⓘ |
| NAOIndexBasedOn | sea level pressure difference between Azores and Iceland ⓘ |
| negativePhaseEffect |
colder winters in Northern Europe
ⓘ
weaker westerlies over North Atlantic ⓘ wetter conditions in Southern Europe ⓘ |
| occursInRegion | North Atlantic Ocean NERFINISHED ⓘ |
| positivePhaseEffect |
drier conditions in Southern Europe
ⓘ
milder wetter winters in Northern Europe ⓘ stronger westerlies over North Atlantic ⓘ |
| relatedTo |
Arctic Oscillation
NERFINISHED
ⓘ
Northern Annular Mode NERFINISHED ⓘ |
| studiedInContextOf | climate change ⓘ |
| timescale |
decadal variability
ⓘ
interannual variability ⓘ |
| usedFor |
hydrological planning in North Atlantic region
ⓘ
risk assessment for winter storms ⓘ seasonal climate prediction in Europe ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.