Mg/Ca-Temperature Calibration of Polar Benthic foraminifera species for reconstruction of bottom water temperatures on the Antarctic shelf
Mg/Ca-Temperature Calibration of Polar Benthic foraminifera species for reconstruction of bottom water temperatures on the Antarctic shelf
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极地底栖有孔虫物种的镁/钙温度校准,用于重建南极大陆架底部水温
DOI:
10.1016/j.gca.2020.05.027
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发表时间:
2020
影响因子:
5
通讯作者:
Mawbey E
中科院分区:
文献类型:
--
作者:
Mawbey E
Benthic foraminifera Mg/Ca is a well-established bottom water temperature (BWT) proxy used in paleoclimate studies. The relationship between Mg/Ca and BWT for numerous species has been determined using core-top and culturing studies. However, the scarcity of calcareous microfossils in Antarctic shelf sediments and poorly defined calibrations at low temperatures has limited the use of the foraminiferal Mg/Ca paleothermometer in ice proximal Antarctic sediments. Here we present paired ocean temperature and modern benthic foraminifera Mg/Ca data for three species,Trifarina angulosa,Bulimina aculeata, andGlobocassidulina subglobosa,but with a particular focus onTrifarina angulosa.The core-top data from several Antarctic sectors span a BWT range of −1.7 to +1.2 °C and constrain the relationship between Mg/Ca and cold temperatures. We compare our results to published lower-latitude core-top data for species in the same or related genera, and in the case ofTrifarina angulosa,produce a regional calibration. The resulting regional equation forTrifarina angulosais Temperature (°C) = (Mg/Ca −1.14 ± 0.035)/0.069 ± 0.033). Addition of ourTrifarina angulosadata to the previously publishedUvigerina spp. dataset provides an alternative global calibration, although some data points appear to be offset from this relationship and are discussed. Mg-temperature relationships forBulimina aculeataandGlobocassidulina subglobosaare also combined with previously published data to produce calibration equations of Temperature (°C) = (Mg/Ca-1.04 ± 0.07)/0.099 ± 0.01 and Temperature (°C) = (Mg/Ca-0.99 ± 0.03)/0.087 ± 0.01, respectively. These refined calibrations highlight the potential utility of benthic foraminifera Mg/Ca-paleothermometry for reconstructing past BWT in Antarctic margin settings.
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影响因子:
1.6
作者:
W. Majewski;J. Pawłowski
通讯作者:
J. Pawłowski
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
A. Mackensen;H. Grobe;G. Kuhn;D. K. Fu¨tterer
通讯作者:
D. K. Fu¨tterer
影响因子:
4
作者:
V. Peck;C. Allen;S. Kender;E. McClymont;D. Hodgson
通讯作者:
V. Peck;C. Allen;S. Kender;E. McClymont;D. Hodgson
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
W. Majewski;A. Tatur;Jakub Witkowski;A. Gaździcki
通讯作者:
A. Gaździcki
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
S. Ishman;E. Domack
通讯作者:
E. Domack