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  Discrete wavelet analysis of the influence of the North Atlantic Oscillation on Baltic Sea level

Bastos, A., Trigo, R. M., & Barbosa, S. M. (2013). Discrete wavelet analysis of the influence of the North Atlantic Oscillation on Baltic Sea level. Tellus Series A-Dynamic Meteorology and Oceanography, 65(1): 20077. doi:10.3402/tellusa.v65i0.20077.

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http://dx.doi.org/10.3402/tellusa.v65i0.20077 (Publisher version)
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 Creators:
Bastos, Ana1, Author           
Trigo, R. M., Author
Barbosa, S. M., Author
Affiliations:
1External Organizations, ou_persistent22              

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Free keywords: SCALE ATMOSPHERIC CIRCULATION; AIR-TEMPERATURE; VARIABILITY; CLIMATE; PRECIPITATION; TRENDS; TRANSFORM; GIBRALTAR; SURFACE; FLOWMeteorology & Atmospheric Sciences; Oceanography; Baltic Sea; NAO; Discrete wavelet analysis; MSL; Wavelet correlation;
 Abstract: Mean sea level (MSL) in the Baltic Sea is influenced by several factors and therefore presents a complex behaviour over a wide range of time-scales. This work performs a multi-scale analysis of MSL variability in the Baltic Sea using discrete wavelet analysis. The North Atlantic Oscillation (NAO) is well known for having a strong influence in MSL variability over the Baltic; however, the relationship between MSL and NAO at different time-scales is still little understood. In this work a comparison of MSL and NAO variability is performed for a wide range of temporal scales, uncovering distinct relationships in high-frequency and long-term temporal variability. The annual and sub-annual scales are found to account for more than 50% of the total MSL variability. The MSL annual cycle is analysed and a shift from low to high amplitude values is identified in the 1970s for most stations. MSL is found to be anti-correlated to NAO at short time-scales while on the long-term NAO and MSL appear to be positively correlated for most stations. The physical mechanisms behind these distinct relationships deserve deeper study.

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Language(s): eng - English
 Dates: 2013
 Publication Status: Published online
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000316549200001
DOI: 10.3402/tellusa.v65i0.20077
Other: BEX953
 Degree: -

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Title: Tellus Series A-Dynamic Meteorology and Oceanography
  Other : Tellus Ser. A-Dyn. Meteorol. Oceanol.
Source Genre: Journal
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Publ. Info: Copenhagen, DK : Blackwell Munksgaard
Pages: - Volume / Issue: 65 (1) Sequence Number: 20077 Start / End Page: - Identifier: ISSN: 0280-6495
CoNE: https://pure.mpg.de/cone/journals/resource/954925506307