caa a22 4500 445299347 CHVBK 20180317142552.0 cr unu---uuuuu 170323e20100101xx s 000 0 eng 10.1007/s11430-009-0179-8 doi (NATIONALLICENCE)springer-10.1007/s11430-009-0179-8 Ni YunYan Research Institute of Petroleum Exploration and Development, PetroChina, 100083, Beijing, China aut A comparative study of boron isotopes and trace elements of the marine foraminifers during the last glacial maximum and Holocene [Elektronische Daten] [YunYan Ni] Boron isotopic compositions in marine planktonic foraminifers can record changes in seawater pH and hence provide a new tool to reconstruct the changes of paleo-atmospheric PCO2. Here a comparative study was done on boron isotopes and trace element abundances of planktonic foraminifers, Globigerinoides sacculifer and Globigerinoides ruber from three tropical ODP sites, Site 806B, Site 664C and Site 999A. It is demonstrated here that G. ruber is a better species to be used for downcore boron isotope analyses on glacial-interglacial scales, particularly since G. sacculifer is prone to dissolution causing unexpectedly light boron isotopes during glacial times. It has been shown that the trace elements composition of foraminifers (i.e., Mg/Ca, U/Ca, B/Ca, and Li/Ca) can reflect the variations of seawater temperature and/or [CO3 2−]. However, all of these systems are highly species de- pendent and affected by other vital effects, and it is therefore important to perform necessary calibrations when applying them to the downcore analyses. Science in China Press and Springer Berlin Heidelberg, 2009 foraminifers nationallicence boron isotope nationallicence trace element nationallicence last glacial maximum nationallicence atmospheric P CO2 nationallicence Science in China Series D: Earth Sciences SP Science in China Press 53/1(2010-01-01), 91-100 1674-7313 53:1<91 2010 53 11430 https://doi.org/10.1007/s11430-009-0179-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-009-0179-8 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Ni YunYan Research Institute of Petroleum Exploration and Development, PetroChina, 100083, Beijing, China aut NATIONALLICENCE 773 0- Science in China Series D: Earth Sciences SP Science in China Press 53/1(2010-01-01), 91-100 1674-7313 53:1<91 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer