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. Author manuscript; available in PMC: 2018 May 17.
Published in final edited form as: Geophys Res Lett. 2017 Dec 13;44(24):12543–12550. doi: 10.1002/2017GL076150

Figure 1.

Figure 1

(a–b) Empirical orthogonal function (EOF) loadings of JJA seasonal mean ozone residuals from 1980 to 2016 after removing the effects of surface air temperature, specific humidity, and north-south and east-west wind speeds. (c–d) Correlations between the principal components time series for the first and second mode (PC1, PC2) with sea surface temperatures. (e–f) Same as (c–d), but for the 500-hPa geopotential heights. All data are detrended by removing the 7-year moving average. The dashed contour lines enclose regions in which the correlations reach statistical significance (p<0.05).