摘要
在北极楚科奇海和白令海表层沉积物中检出长链烯酮化合物 ,研究结果表明楚科奇海和白令海沉积物中长链烯酮以C37∶3甲基酮占优势 ,C37～C39不饱和烯酮丰度变化顺序为C37>C38>C39.根据∑C37/∑C38比值 ,所检出的长链烯酮母质生物主要是颗石藻 (Emilianiahuxleyi) .应用Uk37和Uk′37标准校正关系式估算了表层海水古温度 ,其中Uk′37估算值为 4.1 47～ 5.70 6℃ (平均为 5.0 92℃ ) .
Long chain alkenone compounds have been first detected in surface sediments from the Chukchi Sea and the Bering Sea in the Arctic. The result shows that C 37∶3 methy alkenones predominate in the Arctic. Abundances of C 37 -C 39 methy and ethyl alkenones change in order of C 37 >C 38 >C 39 . The ratio between total abundances of C 37 and C 38 alkenone (∑C 37 /∑C 38 ) may indicate the production ratio of alkenones derived from the coceolithophrid ( Emiliania huxleyi ). Calibration of alkenone unsaturation ratios (U k 37 and U k′ 37 ) is used to estimate paleotemperature, U k′ 37 - T is used to the indication of SST range from 4.147 to 5.706 ℃ (average value is 5.092 ℃).
出处
《海洋学报》
CAS
CSCD
北大核心
2001年第5期49-57,共9页
基金
中国首次北极科学考察资助项目
国家重点基础研究发展规划资助项目 (G2 0 0 0 0 785 0 3) .
