| 三门湾沉积记录中长链烯酮不饱和指数-海表温度和浮游动物群落对厄尔尼诺/拉尼娜的响应 |
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| 引用本文： | 张海生,宁修仁,乐凤凤,胡锡钢,刘镇盛,卢冰.三门湾沉积记录中长链烯酮不饱和指数-海表温度和浮游动物群落对厄尔尼诺/拉尼娜的响应[J].海洋学报,2010,32(3):40-50. |
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| 作者姓名： | 张海生 宁修仁 乐凤凤 胡锡钢 刘镇盛 卢冰 |
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| 作者单位： | 国家海洋局 第二海洋研究所 海洋生态系统和生物地球化学国家海洋局重点实验室,浙江 杭州 310012 |
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| 基金项目： | 国家自然科学基金项目(40876063;40876104)。 |
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| 摘 要： | 应用沉积地层记录中长链烯酮不饱和指数(U3K7)估算1916—2003年三门湾表层海水温度(SST)与变化。SST波动范围为15.97~18.00℃,年平均为17.03℃。该值比当年实测海水全年平均温度低3.52℃,同时应用长链烯醇不饱和指数与SST的关系重建历史上的厄尔尼诺现象。研究显示三门湾的厄尔尼诺气候事件在大尺度上与东太平洋一样均受制于气候影响,在变化尺度上又受到地理位置和地方性气候(季风)的影响,厄尔尼诺事件在形式和年代上相互对应,但是其涛动幅度不如东太平洋的强烈。通过比较厄尔尼诺期间(2003/2002年)和非厄尔尼诺期间(2006/2005年)的浮游动物群落结构变动信号、生物量、密度以及物种多样性等,在厄尔尼诺时期浮游动物种类数、生物量和丰度呈现偏高的趋势,三门湾的暖水性浮游动物类群、数量变化与台湾暖流活动过程中携带的浮游性动物有密切的联系。
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| 关 键 词： | 三门湾 沉积地层记录 长链烯酮不饱和指数 表层海水温度变化 厄尔尼诺/拉尼娜事件 浮游动物 |
| 收稿时间： | 2009/2/23 0:00:00 |
| 修稿时间： | 3/9/2010 12:00:00 AM |
Responses of long-chain alkenone unsaturation index-sea sarface temperatare in stratigraphic record and zooplankton community in the Sanmen Bay to El Ni(n)o/La Ni(n)a phenomina |
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| ZHANG Hai-sheng,NING Xiu-ren,LE Feng-feng,HU Xi-gang,LIU Zhen-sheng and LU Bing.Responses of long-chain alkenone unsaturation index-sea sarface temperatare in stratigraphic record and zooplankton community in the Sanmen Bay to El Ni(n)o/La Ni(n)a phenomina[J].Acta Oceanologica Sinica (in Chinese),2010,32(3):40-50. |
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| Authors: | ZHANG Hai-sheng NING Xiu-ren LE Feng-feng HU Xi-gang LIU Zhen-sheng and LU Bing |
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| Institution: | Key Laboratory of State Oceanic Administration for Submarine Geoscience, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | The sea surface temperature (SST) was estimated by the record of long-chain alkenone unsaturation index in the Sanmen Bay sediment. The calculated result shows that SST fluctuation ranges from 15.97 to 18.00 ℃,and average is 17.03 ℃. The calculated value is lower than the annual measured value 3.52 ℃ in the same year. At one time, the stratigraphic record history of El Nio in the Sanmen Bay sediment was reescablished using the relatimship of long-chain alkenone unsaturation index with SST.The research indicates that change of climate event of large scale in the Sanmen Bay is same to that of the Pacific Ocean, both are major influenced by the climate factor. The event corresponds with each other in form and age, but its range of fluctuation is inferior to the Pacific Ocean because of the effect of location and monsoon. A series of characteristics of macrobenthos including the signal of community structure change, biomass, density of inhabit and biodiversity was compared both in the periods of El Nio and non-El Nio. The research indicates that zooplankton species, the biomass and the abundance have the high tendency in the period of El Nio. That was because the intensity of the warm current invasion increased, and warm-water zooplankton was carried into the Samen Bay. |
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