Please wait a minute...
img img
Adv. Search
Advances in Earth Science  2012, Vol. 27 Issue (6): 686-693    DOI: 10.11867/j.issn.1001-8166.2012.06.0686
Articles     
Potential of Foraminiferal B/Ca Ratios for Reconstructing Paleo-seawater pH and CO2-3 Concentrations
Qiao Peijun, Wang Tingting, Jian Zhimin
State Key Laboratory of Marine Geology, Tongji University, Shanghai200092, China
Download:  PDF (1792KB) 
Export:  BibTeX | EndNote (RIS)      
Abstract  

 The analysis of foraminiferal B/Ca ratios is a greatly potential and widely concerned paleoceanographic method, which is applicable to the reconstruction of  the past pH and CO2-3  concentrations of sea water, and under certain situations also can also be used to reflect the changes of the atmospheric CO2 concentration from surface water, and indicate changes of ocean current and water mass of deep water. Compared with the conventional method of boron isotopes, the B/Ca ratio method is relatively easier, more stable, and less  affected less by dissolution and postdeposition alternations. As a result, it is relatively suitable for highresolution paleoceanographic studies. However, this method is comparably new. The foraminiferal biological processes to absorb boron element is still not very clear. Moreover, the mechanisms using B/Ca ratio to reconstruct pH and CO2-3  concentrations is not well accepted. As the method is constructed on the basis of empirical function, establishment of its theoretical basis will be the future and important development of this method.

Key words:  Foraminifera shell      B/Ca ratio      pH value      CO2-3       concentration     
Received:  10 May 2012      Published:  10 June 2012
P736.22  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors

Cite this article: 

Qiao Peijun, Wang Tingting, Jian Zhimin. Potential of Foraminiferal B/Ca Ratios for Reconstructing Paleo-seawater pH and CO2-3 Concentrations. Advances in Earth Science, 2012, 27(6): 686-693.

URL: 

http://www.adearth.ac.cn/EN/10.11867/j.issn.1001-8166.2012.06.0686     OR     http://www.adearth.ac.cn/EN/Y2012/V27/I6/686

[1]Sigman D M, Boyle E A. Glacial/interglacial variations in atmospheric carbon dioxide[J]. Nature, 2000, 407: 859-869.
[2]Sanyal A, Bijma J, Spero H, et al. Empirical relationship between pH and the boron isotope composition of Globigerinoides sacculifer: Implications for the boron isotope paleo-pH proxy[J]. Paleoceanography, 2001,16(5): 515-519.
[3]Palmer M R, Pearson P N. A 23 000-year record of surface water pH and pCO2 in the western equatorial Pacific Ocean[J]. Science, 2003, 300(5 618): 480-482.
[4]Hönisch B, Hemming N G. Surface ocean pH response to variations in pCO2 through two full glacial cycles[J]. Earth and Planetary Science Letters, 2005, 236(1/2): 305-314.
[5]Simone A K, Daniela N S, Jelle B, et al. In situ boron isotope analysis in marine carbonates and its application for foraminifera and paleo-pH[J]. Chemical Geology, 2009, 260(1/2): 138-147.
[6]Yu J, Elderfield H, Hnisch B. B/Ca in planktonic foraminifera as a proxy for surface seawater pH[J]. Paleoceanography, 2007, 22, doi:10.1029/2006PA001347.
[7]Yu J, Elderfield H. Benthic foraminiferal B/Ca ratios reflect deep water carbonate saturation state[J]. Earth and Planetary Science Letters, 2007,258(1/2):73-86.
[8]Foster G L. Seawater pH, pCO2 and [CO2-3] variations in the Caribbean Sea over the last 130 kyr:A boron isotope and B/Ca study of planktic foraminifera[J]. Earth and Planetary Science Letters,2008, 271: 254-266.
[9]Yu J, Foster G L, Elderfield H, et al. An evaluation of benthic foraminiferal B/Ca and δ11B for deep ocean carbonate ion and pH reconstructions[J]. Earth and Planetary Science Letters, 2010, 293(1/2): 114-120.
[10]Rae J W B, Foster G L, Schmidt D N, et al. Boron isotopes and B/Ca in benthic foraminifera: Proxies for the deep ocean carbonate system[J]. Earth and Planetary Science Letters,2011, 302(3/4): 403-413.
[11]Hemming N G, Hanson G N. Boron isotopic composition and concentration in modern marine carbonates[J]. Geochimica et Cosmochemica Acta, 1992, 56(1): 537-543.
[12]Pagani M, Lemarchand D, Spivack A J, et al. A critical evaluation of the boron isotope-pH proxy: The accuracy of ancient ocean pH estimates[J]. Geochimica et Cosmochemica Acta,2005, 69(4): 953-961.
[13]Dickson A G. Thermodynamics of the dissociation of boric acid in synthetic seawater from 273.15 to 318.15 K[J]. Deep Sea Research Part A: Oceanographic Research Papers, 1990,37(5): 755-766.
[14]Sanyal A, Nugent M, Reeder R J, et al. Seawater pH control on the boron isotopic composition of calcite: Evidence from inorganic calcite precipitation experiments[J]. Geochimica et Cosmochimica Acta, 2000, 64(9): 1 551-1 555.
[15]Sanyal A, Hemming N G, Broecker W S, et al. Oceanic pH control on the boron isotopic composition of foraminifera: Evidence from culture experiments[J]. Paleoceanography,1996,11(5): 513-517.
[16]Sanyal A, Hemming N G, Gilbert N, et al. Evidence for a higher pH in the glacial ocean from boron isotopes in foraminifera[J]. Nature,1995, 373(6 511): 234-236.
[17]Wara M W, Delaney M L, Bullen T D, et al. Possible roles of pH, temperature and partial dissolution in determining boron concentration and isotopic composition in planktonic foraminifera[J]. Paleoceanography, 2003, 18(4), doi:10.1029/2002PA000797.
[18]Tripati A K, Roberts C D, Eagle R A. Coupling of CO2 and ice sheet stability over major climate transitions of the last 20 million years[J]. Science, 2009, 326(5 958): 1 394-1 397.
[19]Barker S, Greaves M, Elderfield H. A study of cleaning procedures used for foraminiferal Mg/Ca paleothermometry[J]. Geochemistry Geophysics Geosystems,2003,4(9):1-20, doi:10.1029/2003GC000559.
[20]Boyle E, Keigwin L D. Comparison of Atlantic and Pacific paleochemical records for the last 215 000 years: Changes in deep ocean circulation and chemical inventories[J]. Earth and Planetary Science Letters,1985/86, 76: 135-150.
[21]Al-Ammar A, Gupta R K, Barnes R M. Elimination of boron memory effect in inductively coupled plasma-mass spectrometry by ammonia gas injection into the spray chamber during analysis[J]. Spectrochimica Acta Part B: Atomic Spectroscopy, 1999, 55(6): 629-635.
[22]Yu J, Day J, Greaves M, et al. Determination of multiple element/calcium ratios in foraminiferal calcite by quadrupole ICP-MS[J]. Geochemistry Geophysics Geosystems,2005,6:Q08P01,doi:10.1029/2005GC000964.
[23]Nürnberg D. Magnesium in tests of Neogloboquadrina pachyderma sinistral from high northern and southern latitudes[J].Journal of Foraminiferal Research,1995, 25(4): 350-368.
[24]Anand P, Elderfield H, Conte M H. Calibration of Mg/Ca thermometry in planktonic foraminifera from a sediment trap time series[J].Paleoceanography,2003, 18(2): 1 050, doi:10.29/2002PA000826.
[25]Pelletier G, Lewis E, Wallace D. A calculator for the CO2 system in seawater for Microsoft Excel/VBA[Z]. Washington State Deptartment of Ecology, Olympia, 2005.
[26]Zeebe R E, Wolf-Gladrow. CO2 in Seawater: Equilibrium, Kinetics, Isotopes[M]. Elsevier Oceanography Series,Netherlands: Elsevier, 2001:29.
[27]Lemarchand D, Gaillardet J, Lewin E, et al. Boron isotope systematics in large rivers:Implications for the marine boron budget and paleo-pH reconstruction over the Cenozoic[J]. Chemical Geology, 2002, 190(1/4): 123-140.
[28]Simon L, Lecuyer C, Marechal C, et al. Modelling the geochemical cycle of boron: Implications for the long-term evolution of seawater and oceanic crust[J]. Chemical Geology, 2006, 225(1/2): 61-76.
[29]Uppstrom L R. Boron/chlorinity ratio of deep-sea water from pacific ocean[J].Deep Sea Research Oceanographic Abstracts, 1974, 21: 161-162.
[30]Yu J, Broecker W S, Elderfield H, et al. Loss of carbon from the deep sea since the Last Glacial Maximum[J]. Science, 2010, 330(6 007): 1 084-1 087.
[31]Takahashi T, Sutherland S, Wanninkhof R, et al. Climatological mean and decadal change in surface ocean pCO2, and net sea-air CO2 flux over the global oceans[J]. Deep-Sea Research Ⅱ, 2009, 56(8/10): 554-557.
[32]Tripati A K, Roberts C D, Eagle R A, et al. A 20 million year record of planktic foraminiferal B/Ca ratios: Systematics and uncertainties in pCO2 reconstructions[J]. Geochimica et  Cosmochimica Acta, 2011, 75(10): 2 582-2 610.
[33]Hönisch B, Hemming N G, Archer D, et al. Atmospheric carbon dioxide concentration across the Mid-Pleistocene Transition[J]. Science, 2009, 324(5 934): 1 551-1 554.
[34]Lea D W, Boyle E A. Foraminiferal reconstruction of barium distributions in water masses of the glacial oceans[J].Paleoceanography, 1990, 5(5): 719-742.
[35]Key R M, Kozyr A, Sabine C L, et al. A global ocean carbon climatology: Results from Global Data Analysis Project (GLODAP)[J].Global Geochemical Cycles, 2004, 18:GB4031,doi:10.1029/2004GB002247.
[36]Broecker W S, Clark E. Carbonate ion concentration in glacial-age deep waters of the Caribbean Sea[J]. Geochemistry Geophysics Geosystems,2002,3(3), doi:10.1029/2001GC000231.
[37]Allen K A, Hönisch B, Eggins S M, et al. Controls on boron incorporation in cultured tests of the planktic foraminifer Orbulina universa[J].Earth and Planetary  Science Letters,2011, 309(3/4): 291-301.

No Suggested Reading articles found!