| Application of long-chain alkenones and U37k values for paleotemperature estimation in the Arctic Chukchi Sea-Bering Sea area |
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| 作者姓名： | Lu Bing Chen Ronghu Wang Zipan Chen Jianfang Liu Zhensheng |
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| 作者单位： | Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration,Hangzhou 310012, China
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| 基金项目： | This study was supported by the First Chinese National Scientific Observation for the Arctic;the Development Program of NKBRSF under contract No.G2000078500. |
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| 摘 要： | -Long-chain alkenones were detected in samples of sea surface sediments from the Chukchi Sea and the Bering Sea areas, the Arctic Pole. The analysis result indicates that C37:3 methylketone is pre dominate in the long-chain alkenones from the Chukchi and Bering Sea sediments. The abundance of C37to C39 unsaturated alkenones changes in an order of C37 ＞C38 ＞C39. Based on ∑37/∑38 ratio, the de tected organism precursors of the long-chain alkenones are mainly coccolithophrid (Emiliania huxleyi).By the calibration relationship between U3k7 and U37k indices, the sea surface paleotemperature in these seas is estimated. The estimated values of U37k vary from 4.147℃ to 5. 706℃, with a mean value of 5.092℃.
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| 关 键 词： | Long-chain alkenone SST U37k the Chukchi Sea the Bering Sea paleotemperature |
| 收稿时间： | 6/4/2001 12:00:00 AM |
| 修稿时间： | 2001/7/20 0:00:00 |
Application of long-chain alkenones and U37k values for paleotemperature estimation in the Arctic Chukchi Sea-Bering Sea area |
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| Lu Bing,Chen Ronghu,Wang Zipan,Chen Jianfang,Liu Zhensheng.Application of long-chain alkenones and U37k values for paleotemperature estimation in the Arctic Chukchi Sea-Bering Sea area[J].Acta Oceanologica Sinica,2001,20(3):371-381. |
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| Authors: | Lu Bing Chen Ronghu Wang Zipan Chen Jianfang and Liu Zhensheng |
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| Institution: | Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | -Long-chain alkenones were detected in samples of sea surface sediments from the Chukchi Sea and the Bering Sea areas, the Arctic Pole. The analysis result indicates that C37:3 methylketone is pre dominate in the long-chain alkenones from the Chukchi and Bering Sea sediments. The abundance of C37to C39 unsaturated alkenones changes in an order of C37 ＞C38 ＞C39. Based on ∑37/∑38 ratio, the de tected organism precursors of the long-chain alkenones are mainly coccolithophrid (Emiliania huxleyi).By the calibration relationship between U3k7 and U37k indices, the sea surface paleotemperature in these seas is estimated. The estimated values of U37k vary from 4.147℃ to 5. 706℃, with a mean value of 5.092℃. |
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| Keywords: | Long-chain alkenone SST U37k the Chukchi Sea the Bering Sea paleotemperature |
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