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

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

By: ,   and    
Open Access
|Dec 2013

Figures & Tables

Fig. 1. 

Location of tide gauges over the Baltic Sea.

Table 1. Analysed tide gauge records

Station Long (°E) Lat (°N) Period Furuögrund 21.23 64.92 1916–2010 Gedser 11.93 54.57 1898–2006 Helsinki 24.97 60.15 1879–2010 Kungsholmsfort 15.58 56.01 1887–2010 Landsort 17.87 58.75 1887–2006 Ölands Norra Udde 17.01 57.37 1887–2010 Ratan 20.92 64.00 1892–2010 Rauma 21.43 61.13 1933–2010 Stockholm 18.08 59.32 1889–2010 Warnemünde 12.08 54.18 1856–2010 Wismar 11.47 53.90 1849–2010
Fig. 2. 

Time-series of MSL for each location after removing the GIA trend and the mean from the original records.

Fig. 3. 

MRA decomposition of MSL in Furuogrund. From top to bottom: D1-D6 wavelet coefficients associated with time-scales of 2 j to 2 j+1 months (j=1, 2,…, 6); S6 scaling coefficients (smooth), corresponding to time-scales above 27 (128) months. Vertical dashed lines mark the regions at the beginning and end of the series that are affected at least to some degree by boundary conditions.

Fig. 4. 

Normalised empirical variance (%) of MSL in Furuogrund. The dashed lines indicate the 95% confidence interval.

Fig. 5. 

MSL annual amplitude during the period 1916–2010 for Furuogrund.

Fig. 6. 

As in Fig. 3, but for NAO time-series. Vertical dashed lines mark the regions at the beginning and end of the series that are affected at least to some degree by boundary conditions.

Fig. 7. 

As in Fig. 4, but for the NAO time-series. The dashed lines indicate the 95% confidence interval.

Fig. 8. 

Wavelet correlation between MSL in Furuogrund and NAO for scales of 2 j to 2 j+1 months (j=1, 2,…, 6). The dashed lines indicate the 95% confidence interval.

Fig. 9. 

As in Fig. 5 but for all MSL records.

Fig. 10. 

As in Fig. 8 but for all MSL records. The dashed lines indicate the 95% confidence interval.

Language: English
Page range: 20077 - 20077
Submitted on: Nov 13, 2012
Accepted on: Feb 7, 2013
Published on: Dec 1, 2013
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services

© 2013 A. Bastos, R. M. Trigo, S. M. Barbosa, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.