Both the PC1 and TPI time series show a negative trend for the 44-year period between 1979 and 2022, contributing to strengthen the zonal SST gradient.
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North Atlantic influence reconciling model-observation discrepancy in the tropical Pacific warming pattern.
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The sentences
However, there exists a positive trend in the ensemble mean during recent decades, which may have contributed to weaken ΔSST x in MIROC6.