noaa-ocean-5968 Lund and Curry 2006 High Resolution Florida Current Foraminferal SST Data Lund, D.C.; Curry, W.B. Lund and Curry 2006 High Resolution Florida Current Foraminferal SST Data 2007-10-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/5968 Investigator D.C. Lund Investigator W.B. Curry earth science paleoclimate paleocean geochemistry earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean reconstruction geoscientificInformation Little Ice Age (LIA) Sea Surface Temperature Reconstruction 5210 cal yr BP 0 cal yr BP Complete 24.3267 24.7583 -83.58 -79.2683 -694 -530 Ocean Atlantic Ocean North Atlantic Ocean Gulf Of Mexico KNR166-2-118MC-A>LATITUDE 24.59>LONGITUDE -79.2683 Ocean Atlantic Ocean North Atlantic Ocean KNR166-2-125MC-D>LATITUDE 24.7583>LONGITUDE -79.2917 Ocean Pacific Ocean North Pacific Ocean W167-79GGC>LATITUDE 24.6>LONGITUDE -83.58 Ocean Atlantic Ocean North Atlantic Ocean Gulf Of Mexico KNR166-2-62MC-A>LATITUDE 24.3267>LONGITUDE -83.2567 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Lund, D.C. and W. Curry. 2006. Florida Current surface temperature and salinity variability during the last millennium. Paleoceanography, Vol. 21, PA2009, May 2007. doi:10.1029/2005PA001218.

The salinity and temperature of the Florida Current are key parameters affecting the transport of heat into the North Atlantic, yet little is known about their variability on centennial timescales. Here we report replicated, high-resolution foraminiferal records of Florida Current surface hydrography for the last millennium from two coring sites, Dry Tortugas and the Great Bahama Bank. The oxygen isotopic composition of Florida Current surface water (d18Ow) near Dry Tortugas increased 0.4% during the course of the Little Ice Age (LIA) (~1200-1850 A.D.), equivalent to a salinity increase of 0.8–1.5. On the Great Bahama Bank, where surface waters are influenced by the North Atlantic subtropical gyre, d18Ow increased by 0.3% during the last 200 years. Although a portion (~0.1%) of this shift may be an artifact of anthropogenically driven changes in surface water ECO2, the remaining d18Ow signal implies a 0.4–1 increase in salinity after 200 years B.P. The simplest explanation of the d18Ow data is southward migration of the Atlantic Hadley circulation during the LIA. Scaling of the d18Ow records to salinity using the modern low-latitude d18Ow-S slope produces an unrealistic reversal in the salinity gradient between the two sites. Only if d18Ow is scaled to salinity using a high-latitude d18Ow-S slope can the records be reconciled. Variable atmospheric 14C paralleled Dry Tortugas d18Ow, suggesting that solar irradiance paced centennial- scale migration of the Inter-Tropical Convergence Zone and changes in Florida Current salinity during the last millennium. STUDY NOTES: Florida Current foraminiferal oxygen isotope and Mg/Ca records for the last millennium from two cores in the Dry Tortugas and two cores on the Great Bahama Bank. The d18Ocalcite values are in per mil units, the Mg/Ca values mmol/mol. This file updated 6/2012 with the addition of SST reconstructions, data series 2. and 3. below (Original receipt by WDC Paleo 10/2007). Core locations: Dry Tortugas sites 62MC 24°19.60N, 83°15.40W, 547 m depth 79GGC 24°21.50N, 83°20.90W, 530 m depth The Great Bahama Bank sites 118MC 24°35.40N, 79°16.10W, 531 m depth 125MC 24°45.50N, 79°17.50W, 694 m depth

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