Search Help
Daily Arctic Oscillation (AO) Index from NOAA/NWS/Center for Climate Prediction

[ Get Data ]

Abstract: [Source: NOAA Climate Prediction Center, ]

The daily Arctic Oscillation (AO) index is constructed by projecting the daily (00Z) 1000mb height anomalies poleward of 20N onto the loading pattern of the AO.

The daily AO index and its forecasts using MRF and Ensemble mean forecast data are available for the previous 120 days and they are normalized by standard deviation of the monthly AO index from 1979 to 2000. A 3-day running mean is applied for the forecast indices.

Monthly mean and seasonal (JFM) AO Index data are also available since 1950.
Related URL
Description: Access to AO documentation, current graphs and data

Description: Access to AO monthly means since 1950.
Geographic Coverage
Spatial coordinates   
  N: 90.0   S: 20.0   E: 180.0   W: -180.0
Min Altitude: 1000MB Max Altitude: 0MB

Data Set Citation
Dataset Originator/Creator: NOAA/NWS/CPC
Dataset Title: Arctic Oscillation Index
Dataset Series Name: NOAA/NWS/CPC Indices and Forecasts
Dataset Release Date: ongoing
Dataset Release Place: Camp Springs, MD
Dataset Publisher: NOAA National Weather Service, Center for Climate Prediction
Online Resource:
Temporal Coverage
Start Date: 1950-01-01
Data Resolution
Temporal Resolution: daily, monthly mean, seasonal mean
Data Set Progress
Originating Center
Distribution Media: online www
Distribution Format: ascii
Fees: none
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
DIF Creation Date: 2003-02-12
Last DIF Revision Date: 2017-08-23