Pronounced centennial-scale Atlantic Ocean climate variability correlated with Western Hemisphere hydroclimate
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Abstract
Surface-ocean circulation in the northern Atlantic Ocean influences Northern Hemisphere climate. Century-scale circulation variability in the Atlantic Ocean, however, is poorly constrained due to insufficiently-resolved paleoceanographic records. Here we present a replicated reconstruction of sea-surface temperature and salinity from a site sensitive to North Atlantic circulation in the Gulf of Mexico which reveals pronounced centennial-scale variability over the late Holocene. We find significant correlations on these timescales between salinity changes in the Atlantic, a diagnostic parameter of circulation, and widespread precipitation anomalies using three approaches: multiproxy synthesis, observational datasets, and a transient simulation. Our results demonstrate links between centennial changes in northern Atlantic surface-circulation and hydroclimate changes in the adjacent continents over the late Holocene. Notably, our findings reveal that weakened surface-circulation in the Atlantic Ocean was concomitant with well-documented rainfall anomalies in the Western Hemisphere during the Little Ice Age.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Pronounced centennial-scale Atlantic Ocean climate variability correlated with Western Hemisphere hydroclimate |
| Series title | Nature Communications |
| DOI | 10.1038/s41467-018-02846-4 |
| Volume | 9 |
| Year Published | 2018 |
| Language | English |
| Publisher | Nature |
| Contributing office(s) | St. Petersburg Coastal and Marine Science Center |
| Description | Article number 392; 11 p. |
| First page | 1 |
| Last page | 11 |
| Google Analytic Metrics | Metrics page |