NAO Monthly Time-series
The NAO is one of the major modes of Northern Hemisphere atmospheric variability.
Correlation of 20CRV3 January SLP with the NAO Index. Created with the Atmospheric WRIT Correlation Tool.
Times-series from the WRIT Time-series Plotting Tool (center this)
Description
The North Atlantic Oscialltion is a mode of variabily in the norther hemisphere. The are different methods used to calculate it. CRU's method is the traditional one where The NAO is defined as the normalized pressure difference between a station on the Azores and one on Iceland. This is the Iceland defintion.Temporal Coverage
- Monthly values: 1821/01 to 2021/12
- Update Status: Static
Data Notes
- Units: mb
- Missing data value: -999.0
Time-series List
- NAO: Standard PSL Format, CSV, NetCDF (What is standard format?)
- NAO (1948-->): Standard PSL Format, CSV, NetCDF (What is standard format?)
Usage Restrictions
- None
Caveats
- None
Related Time-series
- North Atlantic Oscillation: Iceland SLP(NAO ICE) Monthly Time-series
- North Atlantic Oscillation: Gibralter SLP(NAO GIB) Monthly Time-series
Links
Original Source
- Data is from CRU via the page http://www.cru.uea.ac.uk/cru/data/nao/.
Time-series source dataset(s)
- Input data for the mode calculation is the NCEP/NCAR Reanalysis.
Citation
- See CRU
References
- Hurrell, J.W., 1995: Decadal trends in the North Atlantic Oscillation and relationships to regional temperature and precipitation. Science, 269, 676-679.
- Jones, P.D., Jo'nsson, T. and Wheeler, D., 1997: Extension to the North Atlantic Oscillation using early instrumental pressure observations from Gibraltar and South-West Iceland. Int. J. Climatol., 17, 1433-1450.