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. 2017 Jun 28;3(6):e1700584. doi: 10.1126/sciadv.1700584

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Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).

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Fig. 4 — (A) Five-year running average of MAR JJA cloud cover (green; %), JJA NAO index (blue), and JJA GBI (orange). (B) The scatterplot (purple) shows the correlation (R² = 0.75, P < 0.001) between observed NAO index and MAR cloud cover (both for JJA). (C) The scatterplot (red) shows the correlation (R² = 0.74, P < 0.001) between GBI and MAR cloud cover (both for JJA).