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. 2017 Sep 20;7:11987. doi: 10.1038/s41598-017-12278-7

Figure 1.

Figure 1

PV intrusion frequency during EN and LN. (a,c,e,g,i) Represent correlation coefficient between NDJFM mean Nino 3.4 index and Pacific PV (150°–280°E) intrusion events for ERA 40 (1979–2002), ERA interim (1979–2012), NCEP (1979–2012), JRA 55 (1979–2012) and JRA 25 (1979–2012), respectively. The significant (>95%) correlation coefficient (R) value is written within each subplots. (b,d,f,h,j) Represent the total (gray bar) and average (black bar) number of Pacific intrusions in the El-Nino (EN) and La-Nina (LN) years for the respective datasets mentioned above.