TY - JOUR
T1 - Drought in the Northern Bahamas from 3300 to 2500 Years Ago
AU - van Hengstum, Peter J.
AU - Maale, Gerhard
AU - Donnelly, Jeffrey P.
AU - Albury, Nancy A.
AU - Onac, Bogdan P
AU - Sullivan, Richard
AU - Winkler, Tyler S.
AU - Tamalavage, Anne E.
AU - MacDonald, Dana
PY - 2018/4/1
Y1 - 2018/4/1
N2 - Intensification and western displacement of the North Atlantic Subtropical High (NASH) is projected for this century, which can decrease Caribbean and southeastern American rainfall on seasonal and annual timescales. However, additional hydroclimate records are needed from the northern Caribbean to understand the long-term behavior of the NASH, and better forecast its future behavior. Here we present a multi-proxy sinkhole lake reconstruction from a carbonate island that is proximal to the NASH (Abaco Island, The Bahamas). The reconstruction indicates the northern Bahamas experienced a drought from ∼3300 to ∼2500 Cal yrs BP, which coincides with evidence from other hydroclimate and oceanographic records (e.g., Africa, Caribbean, and South America) for a synchronous southern displacement of the Intertropical Convergence Zone and North Atlantic Hadley Cell . The specific cause of the hydroclimate change in the northeastern Caribbean region from ∼3300 to 2500 Cal yrs BP was probably coeval southern or western displacement of the NASH, which would have increased northeastern Caribbean exposure to subsiding air from higher altitudes .
AB - Intensification and western displacement of the North Atlantic Subtropical High (NASH) is projected for this century, which can decrease Caribbean and southeastern American rainfall on seasonal and annual timescales. However, additional hydroclimate records are needed from the northern Caribbean to understand the long-term behavior of the NASH, and better forecast its future behavior. Here we present a multi-proxy sinkhole lake reconstruction from a carbonate island that is proximal to the NASH (Abaco Island, The Bahamas). The reconstruction indicates the northern Bahamas experienced a drought from ∼3300 to ∼2500 Cal yrs BP, which coincides with evidence from other hydroclimate and oceanographic records (e.g., Africa, Caribbean, and South America) for a synchronous southern displacement of the Intertropical Convergence Zone and North Atlantic Hadley Cell . The specific cause of the hydroclimate change in the northeastern Caribbean region from ∼3300 to 2500 Cal yrs BP was probably coeval southern or western displacement of the NASH, which would have increased northeastern Caribbean exposure to subsiding air from higher altitudes .
UR - https://digitalcommons.usf.edu/geo_facpub/1908
UR - https://doi.org/10.1016/j.quascirev.2018.02.014
U2 - 10.1016/j.quascirev.2018.02.014
DO - 10.1016/j.quascirev.2018.02.014
M3 - Article
VL - 186
JO - Quaternary Science Reviews
JF - Quaternary Science Reviews
ER -