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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 2.

Figure 2

Slope of JJA AQS ozone with standardized Niño 1+2 index in (a) Jan-Feb-Mar, (b) Mar-Apr-May and (c) Jun-Jul-Aug for 1980–2016. (d–f) Same as (a–c), but for the 1990–2016 timeframe. (g–i) Same as (d–f), but using the ozone observations in CASTNET. All data are detrended by subtracting the 7-year moving averages. Grid boxes with statistically significant correlations (p <= 0.1) are stippled in (a–f) or circled in (g–i). The black and red rectangles in (a) are used to define the ozone dipole pattern as discussed in Figure S4.