Fig. 4: Tropical-polar teleconnections.
From: Decadal oscillation provides skillful multiyear predictions of Antarctic sea ice
The correlation maps of the Pacific-quasi-decadal oscillation (PQDO) index with 200 hPa geopotential height (contour) and surface air temperature (shading) in the (a) observation and (b) the central tropical Pacific pacemaker experiment (CP_EXP). c, d are the correlation maps of the PQDO index with Antarctic sea ice concentration in the observation and the CP_EXP, respectively, and have been preprocessed by 8-yr lowpass filtering. The dotted shading indicates the correlation coefficient is significant at the 95% confidence level. e The detrended and normalized time series of the PQDO index and the simulated Antarctic decadal oscillation (AADO) index in the CP_EXP. The model output is analysed from 1981 to 2020, consistent with the observation. Base maps for Fig. 4a–d were generated using the NCAR Command Language (version 6.6.2).
