Caribbean hydroclimate and vegetation history across the last glacial period

摘要: Abstract We present a new speleothem trace element and stable isotope record, which extends previous paleoclimate evidence from Cuban speleothems to the last 96 ka. Multiple proxies were used reconstruct Caribbean hydroclimate vegetation variability on orbital millennial timescales. In particular, our indicate shift more abundant C4 (compared C3) and/or reduced soil activity during Last Glacial Maximum. Our results confirm close link of precipitation North Atlantic climate variability, insolation strength AMOC. The associated variations in SSTs ITCZ led substantial changes hydrological cycle. During Heinrich stadials Younger Dryas, climatic conditions Cuba comparably cool dry. contrast, warm Dansgaard/Oeschger cycles accompanied by wetter conditions. This is agreement with for Holocene, when cold (warm) events coincided drier (wetter) Cuba. However, record suggests that this connection was less dominant MIS 4 2, displayed weaker response shifts than 5 particular. hypothesize mediated southerly shifted inducing weakening northern branch Low Level Jet usually transports moisture into Caribbean. strikingly evident deglacial, driest coolest prevailed western HS 1 including Bolling/Allerod interstadial.