References

Climate of the Past

Clim. Past

1814-9332

Copernicus Publications

Göttingen, Germany

10.5194/cp-6-305-2010

A simple mixing explanation for late Pleistocene changes in the Pacific-South Atlantic benthic δ13C gradient

Lisiecki

L. E.

Department of Earth Science, University of California, Santa Barbara, USA

07 05 2010

6 3 305 314

2010

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The fact that the deep-ocean benthic δ13C minimum shifted from the North Pacific to the South Atlantic during the Last Glacial Maximum is often interpretted as evidence of a change in deep water circulation, such as the development of deep water ventilation in the North Pacific or a decrease in Southern Ocean overturning. This study re-evaluates the implications of changes in benthic δ13C gradients by comparing Pacific Deep Water (PDW) δ13C measurements with the values expected for the null hypothesis that PDW ventilation sources remained unchanged throughout the Late Pleistocene. The δ13C compositions of PDW, Northern Component Water (NCW) and Southern Component Water (SCW) are estimated from regional benthic δ13C stacks of 3–6 sites. Changes in PDW δ13C and PDW-SCW δ13C gradients over the past 800 kyr are found to be well described by a constant mixture of 60% NCW and 40% SCW plus a constant Pacific remineralization offset of −0.5‰. Thus, a change in PDW ventilation cannot be inferred solely on the basis of changes in the Pacific-South Atlantic benthic δ13C gradient.

References 1

Adkins, J. F., McIntyre, K., and Schrag, D. P.: The salinity, temperature, and δ18O of the glacial deep ocean, Science, 298, 1769–1773, 2002. \bibitem [Berger et al.(1996)]{Berger96} Berger, W. H., Bickert, T., Yasuda, M. K., and Wefer, G.: Reconstruction of atmospheric CO2 from ice-core data and the deep-sea record of Ontong Java plateau: the Milankovitch chron, Geol. Rundsch., 85, 466–495, <a href="http://dx.doi.org/10.1007/BF02369003">https://doi.org/10.1007/BF02369003</a>, 1996. \bibitem [Bickert et al.(1993)]{Bickert93} Bickert, T., Berger, W. H., Burke, S., Schmidt, H., and Wefer, G.: Late quaternary stable isotope record of benthic foraminifers: sites 805 and 806, Ontong Java plateau, Proc. Ocean Drill. Program Sci. Results, 130, 411–420, 1993. \bibitem [Bickert and Wefer(1996)]{Bickert96} Bickert, T. and Wefer, G.: Late Quaternary deep water circulation in the South Atlantic: reconstruction from carbonate dissolution and benthic stable isotopes, in: The South Atlantic: Present and Past Circulation, edited by: G. Wefer, Berger, W. H., Siedler, G., and Webb, D. J., 599–620, Springer, New York, 1996. \bibitem [Bouttes et al.(2009)]{Bouttes09} Bouttes, N., Roche, D. M., and Paillard D.: Impact of strong deep ocean stratification on the glacial carbon cycle, Paleoceanography, 24, PA3203, <a href="http://dx.doi.org/10.1029/2008PA001707">https://doi.org/10.1029/2008PA001707</a>, 2009. \bibitem [Broecker et al.(1998)]{Broecker98} Broecker, W. S., Peacock, S. L., Walker, S., Weiss, R., Fahrbach, E., Schroeder, M., Mikolajewicz, U., Heinze, C., Key, R., Peng, T.-H., and Rubin, S.: How much deepwater is formed in the Southern Ocean? J. Geophys. Res., 103(C8), 15833–15843, 1998. \bibitem [Broecker et al.(2007)]{Broecker07} Broecker, W., Clark, E., Barker, S., Hajdas, I., Bonani, G., and Moreno, E.: Radiocarbon age of late glacial deep water from the Equatorial Pacific, Paleoceanography, 22, PA2206, <a href="http://dx.doi.org/10.1029/2006PA001359">https://doi.org/10.1029/2006PA001359</a>, 2007. \bibitem [Brovkin et al.(2007)]{Brovkin07} Brovkin, V., Ganopolski, A., Archer, D., and Rahmstorf, S.: Lowering of glacial atmospheric CO2 in response to changes in oceanic circulation and marine biogeochemistry, Paleoceanography, 22, PA4202, <a href="http://dx.doi.org/10.1029/2006PA001380">https://doi.org/10.1029/2006PA001380</a>, 2007.

Charles, C. D., Wright, J. D., and Fairbanks, R. G.: Thermodynamic influences on the marine carbon isotope record, Paleoceanography, 8, 691–697, 1993. \bibitem [Curry and Oppo(2005)]{Curry05} Curry, W. B., and Oppo, D. W.: Glacial water mass geometry and the distribution of δ13C of $§igma CO2$ in the Western Atlantic Ocean, Paleoceanography, 20, PA1017, <a href="http://dx.doi.org/10.1029/2004PA001021">https://doi.org/10.1029/2004PA001021</a>, 2005. \bibitem [Duplessy et al.(1988)]{Duplessy88} Duplessy, J. C., Shackleton, N. G., Fairbanks, R. G., Labeyrie, L., Oppo, D. W., and Kallel, N.: Deepwater source variations during the last climatic cycle and their impact on the global deepwater circulation, Paleoceanography, 3, 343–360, 1988. \bibitem [Flower et al.(2000)]{Flower00} Flower, B. P., Oppo, D. W., McManus, J. F., Venz, K. A., Hodell, D. A., and Cullen, J. L.: North Atlantic intermediate to deep water circulation and chemical stratification during the past 1 Myr, Paleoceanography, 15, 388–403, 2000. \bibitem [Ganachaud et al.(2003)]{Ganachaud03} Ganachaud, A.: Large-scale mass transports, water mass formation, and diffusivities estimated from World Ocean Circulation Experiment (WOCE) hydrographic data, J. Geophys. Res., 108, 3213, <a href="http://dx.doi.org/10.1029/2002JC001565">https://doi.org/10.1029/2002JC001565</a>, 2003. \bibitem [Govin et al.(2009)]{Govin09} Govin, A., Michel, E., Labeyrie, L., Waelbroeck, C., Dewilde, F., and Jansen, E.: Evidence for northward expansion of Antarctic bottom water mass in the Southern Ocean during the last glacial inception, Paleoceanography, 24, PA1202, <a href="http://dx.doi.org/10.1029/2008PA001603">https://doi.org/10.1029/2008PA001603</a>, 2009. \bibitem [Graham et al.(1981)]{Graham81} Graham, D. W., Corliss, B. H., Bender, M. L., and Keigwin, L. D.: Carbon and oxygen isotopic disequilibria of recent deep-sea benthic foraminifera, Mar. Micropaleontol., 6, 483–497, 1981. \bibitem [Herguera et al.(1992)]{Herguera92} Herguera, J. C., Jansen, E., and Berger, W. H.: Evidence for a bathayal front at 2000 m depth in the glacial Pacific, based on a depth transect on Ontong Java plateau, Paleoceanography 7, 273–288, 1992. \bibitem [Hodell et al.(2001)]{Hodell01} Hodell, D. A., Charles, C. D., and Sierro, F. J.: Late Pleistocene evolution of the ocean's carbonate system, Earth Planet. Sc. Lett., 192, 109–124, 2001. \bibitem [Hodell et al.(2003)]{Hodell03} Hodell, D. A., Venz, K. A., Charles, C. D., and Ninnemann, U. S.: Pleistocene vertical carbon isotope and carbonate gradients in the South Atlantic sector of the Southern Ocean, Geochem. Geophy. Geosy., 4(1), 1004, <a href="http://dx.doi.org/10.1029/2002GC000367">https://doi.org/10.1029/2002GC000367</a>, 2003. \bibitem [Huybers et al.(2007)]{Huybers07} Huybers, P., Gebbie, G., and Marchal, O.: Can paleoceanographic tracters constrain meridional circulation rates?, J. Phys. Oceanogr., 37, 394–407, 2007. \bibitem [Johnson(2008)]{Johnson08} Johnson, G. C.: Quantifying Antarctic Bottom Water and North Atlantic Deep Water volumes, J. Geophys. Res., 113, C05027, https://doi.org/10.1029/2007JC004477, 2008. \bibitem [Keigwin(1998)]{Keigwin98} Keigwin, L. D.: Glacial-age hydrography of the far Northwest Pacific Ocean, Paleoceanography, 13, 323–339, 1998. \bibitem [Kroopnick(1985)]{Kroopnick85} Kroopnick, P. M.: The distribution of δ13C of $§igma CO2$ in the world oceans, Deep-Sea Res., 32, 57–84, 1985. \bibitem [Lisiecki and Raymo(2005)]{Lisiecki05} Lisiecki, L. E. and Raymo, M. E.: A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records, Paleoceanography, 20, PA1003, <a href="http://dx.doi.org/10.1029/2004PA001071">https://doi.org/10.1029/2004PA001071</a>, 2005. \bibitem [Lisiecki et al.(2008)]{Lisiecki08} Lisiecki, L. E., Raymo, M. E., and Curry, W. B.: Atlantic overturning responses to Late Pleistocene climate forcings, Nature, 456, 85–88, 2008. \bibitem [Lisiecki and Raymo(2009)]{Lisiecki09} Lisiecki, L. E. and Raymo M. E.: Diachronous benthic δ18O responses during late Pleistocene terminations, Paleoceanography, 24, PA3210, <a href="http://dx.doi.org/10.1029/2009PA001732">https://doi.org/10.1029/2009PA001732</a>, 2009. \bibitem [Lynch-Stieglitz and Fairbanks(1994)]{LS94} Lynch-Stieglitz, J. and Fairbanks, R. G.: A conservative tracer for glacial ocean circulation from carbon isotope and paleonutrient measurements in benthic foraminifera, Nature, 369, 308–310, 1994. \bibitem [Lynch-Stieglitz et al.(1995)]{LS95} Lynch-Stieglitz, J., Stocker, T. F., Broecker, W. S., and Fairbanks, R. G.: The influence of air-sea exchange on the isotopic composition of oceanic carbon: observations and modeling, Global Biogeochem. Cy., 9, 653–665, 1995. \bibitem [Lynch-Stieglitz et al.(1996)]{LS96} Lynch-Stieglitz, J., van Geen, A., and Fairbanks, R. G.: Interocean exchange of glacial North Atlantic intermediate water: evidence from Subantarctic Cd/Ca and carbon isotope measurements, Paleoceanography, 11, 191–201, 1996. \bibitem [Mackensen et al.(1993)]{Mackensen93} Mackensen, A., Hubberton, H.-W., Bickert, T., Fischer, G., and Futterer, D. K.: δ13C in benthic foramineral tests of Fontbotia wuellerstorfi (Schwager) relative to the δ13C of dissolved inorganic water in Southern Ocean deep water: implications for glacial ocean circulation models, Paleoceanography, 6, 587–610, 1993. \bibitem [Marchal and Curry(2008)]{Marchal08} Marchal, O. and Curry, W. B.: On the abyssal circulation in the glacial Atlantic, J. Phys. Oceanogr., 38, 2014–2037, 2008. \bibitem [Marchitto and Broecker(2006)]{Marchitto06} Marchitto, T. M. and Broecker, W. S.: Deep water mass geometry in the glacial Atlantic Ocean: a review of constraints from the paleonutrient proxy Cd/Ca, Geochem. Geophy. Geosy., 7, Q12003, <a href="http://dx.doi.org/10.1029/2006GC001323">https://doi.org/10.1029/2006GC001323</a>, 2006. \bibitem [Marchitto et al.(2007)]{Marchitto07} Marchitto, T. M., Lehman, S. J., Ortiz, J. D., Fluckiger, J., and van Geen, A: Marine radiocarbon evidence for the mechanism of deglacial atmospheric CO2 rise, Science, 316, 1456–1459, 2007. \bibitem [Martinez-Garcia et al.(2009)]{MG09} Martinez-Garcia, A., Rosell-Mele, A., Geibert, W., Gersonde, R., Masque, P., Gaspari, V., and Barbante, C.: Links between iron supply, marine productivity, sea surface temperature, and CO2 over the last 1.1 Ma, Paleoceanography, 24, PA1207, <a href="http://dx.doi.org/10.1029/2008PA001657">https://doi.org/10.1029/2008PA001657</a>, 2009. \bibitem [Matsumoto and Lynch-Stieglitz(1999)]{Matsumoto99} Matsumoto, K. and Lynch-Stieglitz, J.: Similar glacial and Holocene deepwater circulation inferred from Southeast Pacific benthic foraminiferal carbon isotope composition, Paleoceanography, 14, 149–163, 1999. \bibitem [Matsumoto et al.(2002)]{Matsumoto02} Matsumoto, K., Oba, T., Lynch-Stieglitz, J., and Yamamoto, H.: Interior hydrography and circulation of the glacial Pacific Ocean, Quat. Sci. Rev., 21, 1693–1704, 2002. \bibitem [McCave et al.(2008)]{McCave08} McCave, I. N., Carter, L., and Hall, I. R.: Glacial-interglacial changes in water mass structure and flow in the SW Pacific Ocean, Quat. Sci. Rev., 27, 1886–1908, 2008. \bibitem [McCorkle et al.(1990)]{McCorkle90} McCorkle, D. C., Keigwin, L. D., Corliss, B. H., and Emerson, S. R.: The influence of microhabitats on the carbon isotopic composition of deep-sea benthic foraminifera, Paleoceanography, 5, 161–185, 1990. \bibitem [McCorkle et al.(1997)]{McCorkle97} McCorkle, D. C., Corliss, B. H., and Farnham, C. A.: Vertical distributions and stable isotopic compositions of live (stained) benthic foraminifera from the North Carolina and California continental margins, Deep-Sea Res., 44, 983–1024, 1997. \bibitem [McIntyre et al.(1999)]{McIntyre99} McIntyre, K., Ravelo, A. C., and Delaney, M. L.: North Atlantic intermediate waters in the late Pliocene to early Pleistocene, Paleoceanography, 14, 324–335, 1999. \bibitem [McManus et al.(1999)]{McManus99} McManus, J. F., Oppo, D. W., and Cullen, J. L.: A 0.5-million-year record of millennial-scale climate variability in the North Atlantic, Science, 283, 971–974, 1999. \bibitem [McManus et al.(2004)]{McManus04} McManus, J. F., Francois, R., Gherardi, J.-M., Keigwin, L. D., and Brown-Leger, S.: Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes, Nature, 428, 834–837, 2004. \bibitem [Millo et al.(2006)]{Millo06} Millo, C., Sarnthein, M., Voelker, A., and Erlenkeuser, H.: Variability of the Denmarl Strait Overflow during the Last Glacial Maximum, Boreas, 35, 50–60, 2006. \bibitem [Mix et al.(1991)]{Mix91} Mix, A. C., Pisias, N. G., Zahn, R., Rugh, W., Lopez, C., and Nelson, K.: Carbon 13 in Pacific deep and intermediate waters, 0–370 ka: implications for ocean circulation and Pleistocene CO2, Paleoceanography, 6, 205–226, 1991. \bibitem [Mix et al.(1995a)]{Mix95a} Mix, A. C., Le, J., and Shackleton, N. J.: Benthic foraminiferal stable isotope stratigraphy from Site 846: 0–1.8 Ma, Proc. Ocean Drill. Program Sci. Results, 138, 839–847, 1995a. \bibitem [Mix et al.(1995b)]{Mix95b} Mix, A. C., Pisias, N. G., Rugh, W., Wilson, J., Morey, A., and Hagelberg, T. K.: Benthic foraminifer stable isotope record from Site 849 (0–5 Ma): local and global climate changes, Proc. Ocean Drill. Program Sci. Results, 138, 371–412, 1995b. \bibitem [Mook et al.(1974)]{Mook74} Mook, W. G., Bommerson, J. C., and Straverman, W. H.: Carbon isotope fraction between dissolved bicarbonate and gaseous carbon dioxide, Earth Planet. Sc. Lett., 22, 169–176, 1974. \bibitem [Ninnemann and Charles(2002)]{Ninnemann02} Ninnemann, U. S. and Charles, C. D.: Changes in the mode of Southern Ocean circulation over the last glacial cycle revealed by foraminiferal stable isotope variability, Earth Planet. Sc. Lett., 201, 383–396, 2002. \bibitem [Oppo and Horowitz(2000)]{Oppo00} Oppo, D. W. and Horowitz, M.: Glacial deep water geometry: South Atlantic benthic foraminiferal Cd/Ca and δ13C evidence, Paleoceanography, 15, 147–160, 2000. \bibitem [Oppo and Lehman(1993)]{Oppo93} Oppo, D. W. and Lehman, S. J.: Mid-depth circulation of the subpolar North Atlantic during the Last Glacial Maximum, Science, 259, 1148–1152, 1993. \bibitem [Oppo et al.(1998)]{Oppo98} Oppo, D. W., McManus, J. F., and Cullen, J. C.: Abrupt climate change events 500 000 to 340 000 years ago: evidence from subpolar North Atlantic sediments, Science, 279, 1335–1338, 1998. \bibitem [Pahnke and Zahn(2005)]{PahnkeZahn05} Pahnke, K. and Zahn, R.: Southern Hemisphere water mass conversion linked with North Atlantic climate variability, Science, 307, 1741–1746, 2005. \bibitem [Piotrowski et al.(2008)]{Piotrowski08} Piotrowski, A. M., Goldstein, S. L., Hemming, S. R., Fairbanks, R. G., and Zylberberg, D. R.: Oscillating glacial northern and southern deep water formation from combined neodymium and carbon isotopes, Earth Planet. Sc. Lett., 272, 394–405, 2008. \bibitem [Raymo et al.(1997)]{Raymo97} Raymo, M. E., Oppo, D. W., and Curry, W.: The mid-Pleistocene climate transition: A deep sea carbon isotopic perspective, Paleoceanography, 12, 546–559, <a href="http://dx.doi.org/10.1029/97PA01019">https://doi.org/10.1029/97PA01019</a>, 1997. \bibitem [Raymo et al.(2004)]{Raymo04} Raymo, M. E., Oppo, D. W., Flower, B. P., Hodell, D. A., McManus, J. F., Venz, K. A., Kleiven, K. F., and McIntyre, K.: Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene, Paleoceanography, 19, PA2008, <a href="http://dx.doi.org/10.1029/2003PA000921">https://doi.org/10.1029/2003PA000921</a>, 2004. \bibitem [Robinson et al.(2005)]{Robinson05} Robinson, R. S., Sigman, D. M., DiFiore, P. J., Rohde, M. M., Mashiotta, T. A., and Lea, D. W.: Diatom-bound 15N/14N: New support for enhanced nutrient consumption in the ice age subantarctic, Paleoceanography, 20, PA3003, <a href="http://dx.doi.org/10.1029/2004PA001114">https://doi.org/10.1029/2004PA001114</a>, 2005. \bibitem [Rosenthal et al.(1997)]{Rosenthal97} Rosenthal, Y., Boyle, E. A., and Labeyrie, L.: Last Glacial Maximum paleochemistry and deepwater circulation in the Southern Ocean: evidence from foraminiferal cadmium, Paleoceanography, 12, 787–796, 1997. \bibitem [Russon et al.(2009)]{Russon09} Russon, T., Elliot, M., Kissel, C., Cabioch, G., De Deckker, P., and Correge, T.: Middle-late Pleistocene deep water circulation in the southwest subtropical Pacific, Paleoceanography, 24, PA4205, <a href="http://dx.doi.org/10.1029/2009PA001755">https://doi.org/10.1029/2009PA001755</a>, 2009. \bibitem [Shackleton(1977)]{Shackleton77} Shackleton, N. J.: Carbon-13 in Uvigerina: tropical rainforest history and the Equatorial Pacific carbonate dissolution cycles, in: The Fate of Fossil Fuel CO2 in the Oceans, edited by: Andersen, N. R. and Malahoff, A., 401–428, Plenum, New York, 1977. \bibitem [Shackleton and Hall(1984)]{Shackleton84} Shackleton, N. J. and Hall, M. A.: Oxygen and carbon isotope stratigraphy of DSDP Hole 552A: Plio-Pleistocene glacial history, Initial Rep. Deep Sea Drill. Project, 81, 599–609, 1984. \bibitem [Shackleton et al.(1990)]{Shackleton90} Shackleton, N. J., Berger, A., and Peltier, W. R.: An alternative astronomical calibration of the Lower Pleistocene timescale based on ODP Site 677, Trans. R. Soc. Edinburgh Earth Sci., 81, 251–261, 1990. \bibitem [Shackleton et al.(1995)]{Shackleton95} Shackleton, N. J., Hall, M. A., and Pate, D.: Pliocene stable isotope stratigraphy of ODP Site 846, Proc. Ocean Drill. Program Sci. Results, 138, 337–356, 1995. \bibitem [Sikes et al.(2000)]{Sikes00} Sikes, E. L., Samson, C. R., Guilderson, T. P., and Howard, W. R.: Old radiocarbon ages in the Southwest Pacific Ocean during the last glacial period and deglaciation, Nature, 405, 555–559, 2000. \bibitem [Skinner and Shackleton(2005)]{Skinner05} Skinner, L. C. and Shackleton, N. J.: An Atlantic lead over Pacific deep-water change across termination I: implications for the application of the marine isotope stage stratigraphy, Quat. Sci. Rev., 24, 571–580, 2005. \bibitem [Talley et al.(2003)]{Talley03} Talley, L.: Shallow, intermediate, and deep overturning components of the global heat budget, J. Phys. Oceanogr., 33, 530–560, 2003. \bibitem [Tiedemann(1991)]{Tiedemann91} Tiedemann, R.: Acht Millionen Jahre Klimageschichte von Nordwest Afrika und Palao-Ozeanographie des angrenzenden Atlantiks, Geol.-Palaontol. Inst. und Mus., Christian-Albrechts-Univ., Kiel, Germany, Ber. Rep. 46, 190 pp., 1991. \bibitem [Toggweiler et al.(2006)]{Togg06} Toggweiler, J. R., Russell, J. L., and Carson, S. R.: Midlatitude westerlies, atmospheric CO2, and climate change during the ice ages, Paleoceanography, 21, PA2005, <a href="http://dx.doi.org/10.1029/2005PA001154">https://doi.org/10.1029/2005PA001154</a>, 2006. \bibitem [Venz et al.(1999)]{Venz99} Venz, K. A., Hodell, D. A., Stanton, C., and Warnke, D. A.: A 1.0 Myr record of glacial North Atlantic intermediate water variability from ODP site 982 in the Northeast Atlantic, Paleoceanography, 14, 42–52, 1999. \bibitem [Venz and Hodell(2002)]{Venz02} Venz, K. A. and Hodell, D. A.: New evidence for changes in Plio-Pleistocene deep water circulation from Southern Ocean ODP leg 177 site 1090, Palaeogeogr. Palaeocl., 182, 197–220, 2002. \bibitem [Wang et al.(2004)]{Wang04} Wang, P., Tian, J., Cheng, X., Liu, C., and Xu, J.: Major Pleistocene stages in a carbon perspective: the South China Sea record and its global comparison, Paleoceanography, 19, PA4005, <a href="http://dx.doi.org/10.1029/2003PA000991">https://doi.org/10.1029/2003PA000991</a>, 2004. \bibitem [Weber et al.(2007)]{Weber07} Weber, S. L., Drijfhout, S. S., Abe-Ouchi, A., Crucifix, M., Eby, M., Ganopolski, A., Murakami, S., Otto-Bliesner, B., and Peltier, W. R.: The modern and glacial overturning circulation in the Atlantic ocean in PMIP coupled model simulations, Clim. Past, 3, 51–64, 2007.