Ponta Delgada, Azores Sea Level Pressure Monthly Time-series
The NAO is one of the major modes of Northern Hemisphere atmospheric variability. The SLP index for the Azores is used in its calculation.
Correlation January 20CRv3 SLP and the Azores SLP timeseries over the Northern Hemisphere.
WRIT time-series
Description
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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 Azores defintion.
Temporal Coverage
- Monthly values: 1865/01 to 2002/12
- Update Status:Static
Data Notes
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Units: mb
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Time-series List
Source, citation and related Information.
Related 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)
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Surface Observations
Citation
- See the CRU NAO Webpage.
- 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.
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.