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- Publisher Website: 10.1007/s00338-014-1245-z
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Article: Calibration of seawater temperature and d18Oseawater signals in Tridacna maxima’s d18Oshell record based on in situ data
Title | Calibration of seawater temperature and d18Oseawater signals in Tridacna maxima’s d18Oshell record based on in situ data |
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Authors | |
Keywords | Calibration Oxygen stable isotopes Sea surface temperature Tridacna maxima |
Issue Date | 2014 |
Publisher | Springer. The Journal's web site is located at http://link.springer.de/link/service/journals/00338/index.htm |
Citation | Coral Reefs, 2014, v. 34, p. 437-450 How to Cite? |
Abstract | The giant clam Tridacna maxima presents a strong potential for paleoclimatic reconstructions but its use remains limited by the fact that the relationship between the shell stable oxygen isotopes ratio (d 18 O shell ), the sea surface temperature (SST), and the stable oxygen isotopes ratio of seawater (d 18 O sw ) has not been calibrated yet. In this study, a T. maxima specimen was stained with calcein and grown in a tank for 1.5 yr. The tank seawater was monitored weekly for sea surface salinity, and the stable oxygen isotopes ratio of seawater (d 18 O sw ) and SST was recorded hourly. Micro- scopic observations of outer shell layer thin sections revealed micrometric, simple and complex, growth incre- ments. The staining experiment demonstrated that these growth increments were deposited on a daily basis. The weekly d 18 O shell record showed that the shell was precipi- tated in isotopic equilibrium with seawater and that 63 % of the (d 18 O shell - d 18 O sw ) variations were explained by SST variations. A conventional linear function (1) linking T. maxima high-resolution d 18 O shell record, in situ d 18 O sw , and SST data was calculated as: SST 1⁄4 À3:96 Æ 0:59 Ã Dd 18 O þ 20:12 Æ 0:65 ð1Þ where SST is in degree Celsius and Dd 18 O is the difference between the stable oxygen isotopes ratio of the shell and of the seawater (d 18 O shell - d 18 O sw ), in % VPDB. The root mean square error of the SST reconstructed by this equa- tion is ±1.41 °C revealing the potential of T. maxima for paleoclimatic studies. An average SST = f(d 18 O shell - d 18 O sw ) equation for giant clam is proposed by compiling the equations from the present study and previous works SST 1⁄4 À3:79 Æ 0:65 Ã Dd 18 O þ 21:31 Æ 0:93 ð2Þ |
Persistent Identifier | http://hdl.handle.net/10722/227660 |
ISSN | 2023 Impact Factor: 2.7 2023 SCImago Journal Rankings: 0.890 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Duprey, NN | - |
dc.contributor.author | Lazareth, CE | - |
dc.contributor.author | Dupouy, C | - |
dc.contributor.author | Butscher, J | - |
dc.contributor.author | Farman, R | - |
dc.contributor.author | Maes, C | - |
dc.contributor.author | Cabioch, G | - |
dc.date.accessioned | 2016-07-18T09:12:05Z | - |
dc.date.available | 2016-07-18T09:12:05Z | - |
dc.date.issued | 2014 | - |
dc.identifier.citation | Coral Reefs, 2014, v. 34, p. 437-450 | - |
dc.identifier.issn | 0722-4028 | - |
dc.identifier.uri | http://hdl.handle.net/10722/227660 | - |
dc.description.abstract | The giant clam Tridacna maxima presents a strong potential for paleoclimatic reconstructions but its use remains limited by the fact that the relationship between the shell stable oxygen isotopes ratio (d 18 O shell ), the sea surface temperature (SST), and the stable oxygen isotopes ratio of seawater (d 18 O sw ) has not been calibrated yet. In this study, a T. maxima specimen was stained with calcein and grown in a tank for 1.5 yr. The tank seawater was monitored weekly for sea surface salinity, and the stable oxygen isotopes ratio of seawater (d 18 O sw ) and SST was recorded hourly. Micro- scopic observations of outer shell layer thin sections revealed micrometric, simple and complex, growth incre- ments. The staining experiment demonstrated that these growth increments were deposited on a daily basis. The weekly d 18 O shell record showed that the shell was precipi- tated in isotopic equilibrium with seawater and that 63 % of the (d 18 O shell - d 18 O sw ) variations were explained by SST variations. A conventional linear function (1) linking T. maxima high-resolution d 18 O shell record, in situ d 18 O sw , and SST data was calculated as: SST 1⁄4 À3:96 Æ 0:59 Ã Dd 18 O þ 20:12 Æ 0:65 ð1Þ where SST is in degree Celsius and Dd 18 O is the difference between the stable oxygen isotopes ratio of the shell and of the seawater (d 18 O shell - d 18 O sw ), in % VPDB. The root mean square error of the SST reconstructed by this equa- tion is ±1.41 °C revealing the potential of T. maxima for paleoclimatic studies. An average SST = f(d 18 O shell - d 18 O sw ) equation for giant clam is proposed by compiling the equations from the present study and previous works SST 1⁄4 À3:79 Æ 0:65 Ã Dd 18 O þ 21:31 Æ 0:93 ð2Þ | - |
dc.language | eng | - |
dc.publisher | Springer. The Journal's web site is located at http://link.springer.de/link/service/journals/00338/index.htm | - |
dc.relation.ispartof | Coral Reefs | - |
dc.rights | The final publication is available at Springer via http://dx.doi.org/[insert DOI] | - |
dc.subject | Calibration | - |
dc.subject | Oxygen stable isotopes | - |
dc.subject | Sea surface temperature | - |
dc.subject | Tridacna maxima | - |
dc.title | Calibration of seawater temperature and d18Oseawater signals in Tridacna maxima’s d18Oshell record based on in situ data | - |
dc.type | Article | - |
dc.identifier.email | Duprey, NN: nduprey@hku.hk | - |
dc.identifier.doi | 10.1007/s00338-014-1245-z | - |
dc.identifier.scopus | eid_2-s2.0-84939985742 | - |
dc.identifier.hkuros | 259700 | - |
dc.identifier.volume | 34 | - |
dc.identifier.spage | 437 | - |
dc.identifier.epage | 450 | - |
dc.identifier.eissn | 1432-0975 | - |
dc.identifier.isi | WOS:000354189600007 | - |
dc.identifier.issnl | 0722-4028 | - |