Fig. 1: Summer (JJAS) climatology and nearby paleoclimate records.

Map of regional precipitation and magnitude of low-level (850 mb) winds using PERSIANN precipitation data106 and winds from MPI-ESM-Historical107. Nearby records include (1) an ocean sediment core from the Gulf of Mexico59 and the (2) Florida Straight49, speleothem records from (3) Cuba46, (4) Southern Mexico22 and (8) Costa Rica108, additional ocean sediment cores from the (6) Caribbean Sea58, and (7) Cariaco Basin74, and a lake sediment core (5) from Guatemala50.