Fig. 8: Constraining Pacific SST trends improves coupled model precipitation trends over land.
From: Robust impact of tropical Pacific SST trends on global and regional circulation in boreal winter
a DJF precipitation trends (1981/82-2018/19) in GPCP. Statistically significant trends at the 5% significance level are stippled. The blue boxes represent regions impacted by Pacific SST improvement. Distribution of land precipitation trends in the PacCond, NonCond, PacPace, and NonPace ensembles in (b) Maritime Continent, (c) Gulf Coast, (d) Southern Africa, and (e) Amazon Basin. Boxes indicate the interquartile range and median trend, while whiskers represent 10–90% of the trend distribution. Note that only trends over land grid points are quantified in (c–e), while (b) Maritime Continent includes trends over ocean grid points. Thicker lines indicate where the ensemble-mean trends in the Pacific and non-Pacific ensembles are significantly different at the 5% significance level, using a two-tailed Student’s t-test. GPCP trends are shown by the black horizontal lines.
