Developing a Historical Precipitation Record - Satellite-based Applications on Climate Change - page 100

Fig. 7.4 Correlation of the merged reconstruction with the SOI and the NAO indices, 1900-2000.
Annual averages are used for the SOI correlation, and Dec-Mar averages are used for the NAO
Fig. 7.5 Trends of the merged reconstruction (1900-2008) averaged zonally over land, oceans,
and all areas