An effect of dissolved nutrient concentrations on alkenone-based temperature estimates

被引：119

作者：

Epstein, BL ^{[1
]}

D'Hondt, S ^{[1
]}

Quinn, JG ^{[1
]}

Zhang, JP ^{[1
]}

Hargraves, PE ^{[1
]}

机构：

[1] Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882 USA

来源：

PALEOCEANOGRAPHY | 1998年 / 13卷 / 02期

关键词：

D O I：

10.1029/97PA03358

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The ratio of 37-carbon diunsaturated to diunsaturated and triunsaturated alkenones (U-37(K')) produced by some haptophytes is widely used as a proxy for past sea surface temperatures. However, our isothermal culturing experiments with Emiliania huxleyi clone CCMP372 show U-37(K') values to also vary with nutrient availability and cell division rate. These results provide a reasonable explanation for large isothermal variation in U-37(K') values of single coccolithophorid strains grown in culture. They also suggest that alkenone-based estimates of past sea surface temperatures may have been influenced by dissolved nutrient concentrations as well as by temperature.

引用

页码：122 / 126

页数：5

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