TY - JOUR
T1 - Multi-species coral Sr/Ca-based sea-surface temperature reconstruction using Orbicella faveolata and Siderastrea siderea from the Florida Straits
AU - Flannery, Jennifer A.
AU - Richey, Julie N.
AU - Thirumalai, Kaustubh
AU - Poore, Richard Z.
AU - DeLong, Kristine L.
N1 - Funding Information:
We thank Don Hickey, Chris Reich, B.J. Reynolds, and Jordan Sanford from the United States Geological Survey St. Petersburg Coastal and Marine Science Center, the M/V Fort Jefferson crew, and Dry Tortugas National Park personnel for field assistance during this study. Daniel Umberger, Adis Muslic, Tara Roeder, and Kelsey Roberts from the USGS St. Petersburg Coastal and Marine Science Center provided assistance with sample preparation. Tony Greco provided scanning electron microscope assistance. We thank Christopher Maupin from Texas A&M University and Lauren Toth from the USGS St. Petersburg Coastal and Marine Science Center for discussions that improved the manuscript. We appreciate helpful reviews from Brad Rosenheim and an anonymous reviewer. This research was funded jointly using base fuding from the USGS Climate and Land Use Research & Development Program and the USGS Coastal and Marine Geology Program . The study was conducted under scientific research permits DTNP-2008-SCI-0015 and DTNP-2012-SCI-0001 . Any use of trade names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Publisher Copyright:
© 2016
PY - 2017/1/15
Y1 - 2017/1/15
N2 - We present new, monthly-resolved Sr/Ca-based sea-surface temperature (SST) records from two species of massive coral, Orbicella faveolata and Siderastrea siderea, from the Dry Tortugas National Park, FL, USA (DTNP). We combine these new records with published data from three additional S. siderea coral colonies to generate a 278-year long multi-species stacked Sr/Ca-SST record from DTNP. The composite record of mean annual Sr/Ca-SST at DTNP shows pronounced decadal-scale variability with a range of 1 to 2 °C. Notable cool intervals in the Sr/Ca-derived SST lasting about a decade centered at ~ 1845, ~ 1935, and ~ 1965 are associated with reduced summer Sr/Ca-SST (monthly maxima < 29 °C), and imply a reduction in the spatial extent of the Atlantic Warm Pool (AWP). There is significant coherence between the composite DTNP Sr/Ca-SST record and the Atlantic Multidecadal Oscillation (AMO) index, with the AMO lagging Sr/Ca-SST at DTNP by 9 years. Low frequency variability in the Gulf Stream surface transport, which originates near DTNP, may provide a link for the lagged relationship between multidecadal variability at DTNP and the AMO.
AB - We present new, monthly-resolved Sr/Ca-based sea-surface temperature (SST) records from two species of massive coral, Orbicella faveolata and Siderastrea siderea, from the Dry Tortugas National Park, FL, USA (DTNP). We combine these new records with published data from three additional S. siderea coral colonies to generate a 278-year long multi-species stacked Sr/Ca-SST record from DTNP. The composite record of mean annual Sr/Ca-SST at DTNP shows pronounced decadal-scale variability with a range of 1 to 2 °C. Notable cool intervals in the Sr/Ca-derived SST lasting about a decade centered at ~ 1845, ~ 1935, and ~ 1965 are associated with reduced summer Sr/Ca-SST (monthly maxima < 29 °C), and imply a reduction in the spatial extent of the Atlantic Warm Pool (AWP). There is significant coherence between the composite DTNP Sr/Ca-SST record and the Atlantic Multidecadal Oscillation (AMO) index, with the AMO lagging Sr/Ca-SST at DTNP by 9 years. Low frequency variability in the Gulf Stream surface transport, which originates near DTNP, may provide a link for the lagged relationship between multidecadal variability at DTNP and the AMO.
KW - Atlantic multidecadal oscillation
KW - Orbicella faveolata
KW - Paleoclimatology
KW - Sclerochronolgy
KW - Siderastrea siderea
KW - Sr/Ca
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UR - http://www.scopus.com/inward/citedby.url?scp=84997218079&partnerID=8YFLogxK
U2 - 10.1016/j.palaeo.2016.10.022
DO - 10.1016/j.palaeo.2016.10.022
M3 - Article
AN - SCOPUS:84997218079
VL - 466
SP - 100
EP - 109
JO - Palaeogeography, Palaeoclimatology, Palaeoecology
JF - Palaeogeography, Palaeoclimatology, Palaeoecology
SN - 0031-0182
ER -