Climate Dynamics

, Volume 29, Issue 1, pp 51–62 | Cite as

Decadal- to interannual-scale source water variations in the Caribbean Sea recorded by Puerto Rican coral radiocarbon

  • K. Halimeda Kilbourne
  • Terrence M. Quinn
  • Thomas P. Guilderson
  • Robert S. Webb
  • Frederick W. Taylor
Article

Abstract

Water that forms the Florida Current, and eventually the Gulf Stream, coalesces in the Caribbean from both subtropical and equatorial sources. The equatorial sources are made up of, in part, South Atlantic water moving northward and compensating for southward flow at depth related to meridional overturning circulation. Subtropical surface water contains relatively high amounts of radiocarbon (14C), whereas equatorial waters are influenced by the upwelling of low 14C water and have relatively low concentrations of 14C. We use a 250 year record of Δ14C in a coral from southwestern Puerto Rico along with previously published coral Δ14C records as tracers of subtropical and equatorial water mixing in the northern Caribbean. Data generated in this study and from other studies indicate that the influence of either of the two water masses can change considerably on interannual to interdecadal time scales. Variability due to ocean dynamics in this region is large relative to variability caused by atmospheric 14C changes, thus masking the Suess effect at this site. A mixing model produced using coral Δ14C illustrates the time varying proportion of equatorial versus subtropical waters in the northern Caribbean between 1963 and 1983. The results of the model are consistent with linkages between multidecadal thermal variability in the North Atlantic and meridional overturning circulation. Ekman transport changes related to tradewind variability are proposed as a possible mechanism to explain the observed switches between relatively low and high Δ14C values in the coral radiocarbon records.

References

  1. Beers Y (1957) Introduction to the theory of error. Addison–Wesley, Reading, p 66Google Scholar
  2. Broecker WS (1998) Paleocean circulation during the last deglaciation: a bipolar seesaw? Paleoceanography 13:119–121CrossRefGoogle Scholar
  3. Broecker WS, Olson EA (1961) Lamont radiocarbon measurements VIII. Radiocarbon 3:176–204Google Scholar
  4. Centurioni LR, Niiler PP (2003) On the surface currents of the Caribbean Sea. Geophys Res Lett p 30Google Scholar
  5. Davis JC, Proctor ID, Southon JR, Caffee MW, Heikkinen DW, Roberts ML, Moore TL, Turteltaub KW, Nelson DE, Loyd DH, Vogel JS (1990) LLNL/UC AMS facility and research program. Nucl Instrum Methods Phys Res B 52B:269–272CrossRefGoogle Scholar
  6. Delworth TL, Mann ME (2000) Observed and simulated multidecadal variability in the Northern hemisphere. Clim Dyn 16:661–676CrossRefGoogle Scholar
  7. Didden N, Schott F (1993) Eddies in the North Brazil Current retroflection region observed by Geosat altimetry. J Geophys Res 98:20121–20131Google Scholar
  8. Druffel ERM (1980) Radiocarbon in annual coral rings of Belize and Florida. Radiocarbon 22:363–371Google Scholar
  9. Druffel ERM (1982) Banded corals; changes in oceanic carbon-14 during the little ice age. Science 218:13–19CrossRefGoogle Scholar
  10. Druffel ERM (1989) Decadal time scale variability of ventilation in the North Atlantic: high-precision measurements of bomb radiocarbon in banded corals. J Geophys Res 94:3271–3285Google Scholar
  11. Druffel ERM (1996) Post-bomb radiocarbon records of surface corals from the tropical Atlantic Ocean. Radiocarbon 38:563–572Google Scholar
  12. Druffel ERM (1997a) Geochemistry of corals: proxies of past ocean chemistry, ocean circulation and climate. Proc Natl Acad Sci USA 94:8354–8361CrossRefGoogle Scholar
  13. Druffel ERM (1997b) Pulses of rapid ventilation in the North Atlantic surface ocean during the past century. Science 275:1454–1457CrossRefGoogle Scholar
  14. Druffel ERM (2002) Radiocarbon in corals: records of the carbon cycle, surface circulation and climate. Oceanography 15:122–127Google Scholar
  15. Druffel ERM, Griffin S (1993) Large variations of surface ocean radiocarbon: evidence of circulation changes in the southwestern Pacific. J Geophys Res 98:20,249–220,259Google Scholar
  16. Druffel ERM, Linick TW (1978) Radiocarbon in annual coral rings of Florida. Geophys Res Lett 5:913–916Google Scholar
  17. Enfield DB, Mestas-Nuñez AM, Trimble PJ (2001) The Atlantic multidecadal oscillation and its relation to rainfall and river flows in the continental US. Geophys Res Lett 28:2077–2080CrossRefGoogle Scholar
  18. Fratantoni DM (2001) North Atlantic surface circulation during the 1990’s observed with satellite-tracked drifters. J Geophys Res 106:22,067–022,093Google Scholar
  19. Ganopolski A, Rahmstorf S (2001) Rapid changes of glacial climate simulated in a coupled climate model. Nature 409:153–158CrossRefGoogle Scholar
  20. Guilderson TP, Cole JE, Southon JR (2005) Pre-bomb Δ14C variability and the Suess effect in Cariaco Basin surface waters as recorded in hermatypic corals. Radiocarbon 47:57–65Google Scholar
  21. Guilderson TP, Schrag DP, Cane MA (2004) Surface water mixing in the Solomon Sea as documented by a high-resolution coral 14C record. J Clim 17:1147–1156CrossRefGoogle Scholar
  22. Guilderson TP, Schrag DP, Kashgarian M, Southon J (1998) Radiocarbon variability in the western equatorial Pacific inferred from a high-resolution coral record from Nauru Island. J Geophys Res 103:24,641–624,650Google Scholar
  23. Halliwell GR, Weisberg RH, Mayer DA (2003) A synthetic float analysis of upper-limb meridional overturning circulation interior ocean pathways in the tropical/subtropical Atlantic. In: Goni GJ, Malanotte-Rizzoli P (eds) Interhemispheric water exchange in the Atlantic Ocean. Elsevier, Amsterdam, pp 93–136Google Scholar
  24. Johns WE, Lee TN, Schott FA, Zantopp RJ, Evans RH (1990) The North Brazil Current retroflection seasonal structure and eddy variability. J Geophys Res 95:22103–22120CrossRefGoogle Scholar
  25. Johns WE, Townsend TL, Fratantoni DM, Wilson WD (2002) On the Atlantic inflow to the Caribbean Sea. Deep Sea Res I 49:211–243CrossRefGoogle Scholar
  26. Lumpkin R, Garzoli SL (2005) Near-surface circulation in the tropical Atlantic Ocean. Deep Sea Res Part I Oceanogr Res Pap 52:495–518CrossRefGoogle Scholar
  27. Mahadevan A (2001) An analysis of bomb radiocarbon trends in the Pacific. Mar Chem 73:273–290CrossRefGoogle Scholar
  28. Mayer DA, Weisberg RH (1993) A description of COADS surface meteorological fields and the implied Sverdrup transports for the Atlantic Ocean from 30°S to 60°N. J Phys Oceanogr 23:2201–2221CrossRefGoogle Scholar
  29. Mazeika PA, Kinder TH, Burns DA (1983) Measurements of subtidal flow in the Lesser Antilles passages. J Geophys Res 88:7783–4488Google Scholar
  30. Metcalf WG, Stalcup MC, Zemanovic ME (1971) Hydrographic station data from Atlantis II Cruise 56 to the southeastern approaches to the Caribbean Sea, February–April 1970, Rep. WHOI 71-13, Woods Hole Oceanographic Institution, Woods Hole, MA, pp 103Google Scholar
  31. Nydal R, Løvseth K (1996) Carbon-14 measurements in atmospheric CO2 from Northern and Southern hemisphere sites, 1962–1993, Rep. ORNL/CDIAC-93, NDP-057, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, pp 67Google Scholar
  32. Ostlund HG, Grall C (1987) North and Tropical Atlantic tritium and radiocarbon, RSMAS, University of Miami, Miami, Florida, pp 277Google Scholar
  33. Parr AE (1937) A contribution to the hydrography of the Caribbean and Cayman Seas, based upon the observations made by the research ship “Atlantis”, 1933–1934. Bull Bingham Oceanogr Collect 5:110Google Scholar
  34. Reimer P, Baillie MGL, Bard E, Bayliss A, Beck WJ, Bertrand CJH, Blackwell PG, Buck CE, Burr GS, Cutler KB, Damon PE, Edwards RL, Fairbanks RG, Friedrich M, Guilderson TP, Hogg AG, Hughen KA, Kromer B, McCormac G, Manning S, Ramsey CB, Reimer RW, Remmele S, Southon JR, Stuiver M, Talamo S, Taylor FW, van der Plicht J, Weyhenmeyer CE (2004) INTCAL04 terrestrial radiocarbon age calibration, 0–26 Cal kyr bp. Radiocarbon 46:1029–1058Google Scholar
  35. Rhein M, Kirchner K, Mertens C, Steinfeldt R, Walter M, Fleischmann-Wischnath U (2005) Transport of South Atlantic water through the passages south of Guadeloupe and across 16°N, 2000–2004. Deep Sea Res Part I 52:2234–2249CrossRefGoogle Scholar
  36. Richardson PL (2005) Caribbean Current and eddies as observed by surface drifters. Deep Sea Res Part II Top Stud Oceanogr 52:429–463CrossRefGoogle Scholar
  37. Richardson PL, Hufford GE, Limeburner R, Brown WS (1994) North Brazil Current retroflection eddies. J Geophys Res 99:5081–5093CrossRefGoogle Scholar
  38. Schlesinger ME, Ramankutty N (1994) An oscillation in the global climate system of period 65–70 years. Nature 367:723–726CrossRefGoogle Scholar
  39. Schmitz WJ, Richardson PL (1991) On the sources of the Florida Current. Deep Sea Res 38:S379–409Google Scholar
  40. Stuiver M, Ostlund HG (1980) GEOSECS Atlantic radiocarbon. Radiocarbon 22:25–53Google Scholar
  41. Stuiver M, Polach HA (1977) Discussion and reporting of 14C data. Radiocarbon 19:355–363Google Scholar
  42. Suess HE (1953) Natural radiocarbon and the rate of exchange of carbon dioxide between the atmosphere and the sea. In: Science NRCCoN (ed) Nuclear processes in geologic settings. National Academy of Sciences, Washington DC, pp 52–56Google Scholar
  43. Sverdrup HU (1947) Wind-driven currents in a baroclinic ocean: with application to the equatorial currents of the eastern Pacific. Proc Natl Acad Sci USA 33:318–326CrossRefGoogle Scholar
  44. Takahashi T, Peng T-H, Sutherland S (1995) Radiocarbon and CO2 measurements from Tropical Atlantic Study (TTO/TAS), Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, TennesseeGoogle Scholar
  45. Tang LQ, Sheng JY, Hatcher BG, Sale PF (2006) Numerical study of circulation, dispersion, and hydrodynamic connectivity of surface waters on the Belize shelf. J Geophys Res Oceans pp 111Google Scholar
  46. Vellinga M, Wood R (2002) Global climatic impacts of a collapse of the Atlantic thermohaline circulation. Clim Change 54:251–267CrossRefGoogle Scholar
  47. Vogel JS, Southon JR, Nelson DE (1987) Catalyst and binder effects in the use of filamentous graphite for AMS. Nucl Instrum Methods Phys Res B 29:50–56CrossRefGoogle Scholar
  48. Watanabe T, Winter A, Oba T, Anzai R, Ishioroshi H (2002) Evaluation of the fidelity of isotope records as an environmental proxy in the coral Montastrea. Coral Reefs 21:169–178Google Scholar
  49. Weingartner TJ, Weisberg RH (1991) On the annual cycle of equatorial upwelling in the central Atlantic Ocean. J Phys Oceanogr 21:68–82CrossRefGoogle Scholar
  50. Wilson WD, Johns WE (1997) Velocity structure and transport in the Windward Islands passages. Deep Sea Res 44:487–520CrossRefGoogle Scholar
  51. Wust G (1964) Stratification and circulation in the Antillean–Caribbean basins. Columbia University Press, New YorkGoogle Scholar

Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • K. Halimeda Kilbourne
    • 1
    • 5
  • Terrence M. Quinn
    • 1
    • 2
  • Thomas P. Guilderson
    • 3
    • 4
  • Robert S. Webb
    • 5
  • Frederick W. Taylor
    • 2
  1. 1.College of Marine ScienceUniversity of South FloridaSt. PetersburgUSA
  2. 2.Institute for GeophysicsThe John A. and Katherine G. Jackson School of Geosciences, The University of Texas at AustinAustinUSA
  3. 3.Center for Accelerator Mass SpectrometryLawrence Livermore National LaboratoryLivermoreUSA
  4. 4.Department of Ocean Sciences and Institute of Marine ScienceUniversity of California at Santa CruzSanta CruzUSA
  5. 5.NOAA, Earth System Research LaboratoryBoulderUSA

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