01643nas a2200193   4500000000100000008004100001260001500042100001900057700001700076700002100093700002300114700001800137245012100155856003900276300001400315490000700329520109900336020001401435       2017                            d  c2017/10/051 aMichael Toomey1 aRobert Korty1 aJeffrey Donnelly1 aPeter van Hengstum1 aWilliam Curry00aIncreased hurricane frequency near Florida during Younger Dryas Atlantic Meridional Overturning Circulation slowdown  uhttp://dx.doi.org/10.1130/G39270.1  a1047-10500 v453 a<p> The risk posed by intensification of North Atlantic hurricane activity remains controversial, in part due to a lack of available storm proxy records that extend beyond the relatively stable climates of the late Holocene. Here we present a record of storm-triggered turbidite deposition offshore the Dry Tortugas, south Florida, USA, that spans abrupt transitions in North Atlantic sea-surface temperature and Atlantic Meridional Overturning Circulation (AMOC) during the Younger Dryas (12.9\textendash11.7 ka). Despite potentially hostile conditions for cyclogenesis in the tropical North Atlantic at that time, our record and numerical experiments suggest that strong hurricanes may have regularly affected Florida. Less severe surface cooling at mid-latitudes (\~20\textdegree\textendash40\textdegreeN) than across much of the tropical North Atlantic (\~10\textdegree\textendash20\textdegreeN) in response to AMOC reduction may best explain strong hurricane activity during the Younger Dryas near the Dry Tortugas and possibly along the entire southeastern coast of the United States.</p>  a0091-7613