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FilenameFormatSizeDescription
grl_50140_sm_fig1.epsPS document1838KAveraged monthly sea level anomalies based on the mean station observations from Trieste and Marseilles [Woodworth, 2003; PSMSL, 2012]. The observations have been corrected for inverted barometer effects and linear trends, and de-seasonalized based on the mean 1960-2008 climatology. These two stations have been used to infer basin-wide mean Mediterranean Sea level in [Calafat et al., 2012]. The inverted barometer correction is based on sea level pressure from the NCEP/NCAR reanalysis [Kalnay et al., 1996; data provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at http://www.esrl.noaa.gov/psd/]. We then average the two station observations to derive a proxy for Mediterranean mean sea level (using only one station for short periods of missing data; also see Calafat et al. [2012].
grl_50140_sm_fig2.epsPS document14KMonthly North Atlantic Oscillation index (multiplied with -1, right axis), and non-seasonal monthly sea surface height from AVISO (correlation: -0.62). Both time-series have been detrended. We use the monthly principal component (PC)-based North Atlantic Oscillation (NAO) index from Hurrell [2012], which is based on sea level pressure anomalies over the North Atlantic covering the region between 20-80N, 90W-40E). Note that as this NAO index is based on an EOF/PC decomposition, it is better suited to capture the large-scale North Atlantic variability and is less susceptible to the leaking in of local pressure fluctuations into the NAO index.

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