本文選題：中晚全新世 + 西格陵蘭洋流��； 參考：《海洋與湖沼》2016年06期

【摘要】：西格陵蘭位于北極—北大西洋地區(qū),其海洋環(huán)境演變受西格陵蘭洋流中冷、暖水團(tuán)的顯著影響。本文運(yùn)用主成分分析方法對(duì)西格陵蘭Disko灣DA06-139G孔沉積物中主要硅藻屬種進(jìn)行研究,試圖揭示5000a BP以來(lái)西格陵蘭洋流中冷、暖水團(tuán)強(qiáng)度變化對(duì)研究區(qū)海洋環(huán)境的影響。5000—3800a BP期間,東格陵蘭寒流攜帶的極地冷水團(tuán)強(qiáng)度較弱,而北大西洋暖水團(tuán)勢(shì)力較強(qiáng),Disko灣地區(qū)海洋環(huán)境較為溫暖。3800—2000a BP期間,西格陵蘭洋流中極地冷水團(tuán)勢(shì)力呈現(xiàn)階段性增強(qiáng),此時(shí)Disko灣地區(qū)氣候緩慢轉(zhuǎn)冷,海冰覆蓋面積逐漸增加。2000a BP以后,特別是650a BP之后,樣品在主成分軸一上的得分顯著增高,表明Disko灣氣候明顯變冷,來(lái)自東格陵蘭寒流的極地冷水團(tuán)強(qiáng)度顯著增強(qiáng)。Disko灣中晚全新世以來(lái)的硅藻記錄及樣品在主成分軸一上的得分所指示的極地冷水團(tuán)的強(qiáng)度變化與格陵蘭冰芯溫度及海冰變化等具有較好的一致性,說(shuō)明研究區(qū)海流特征與大氣溫度、海冰等環(huán)境要素密切相關(guān)。
[Abstract]:West Greenland is located in the Arctic-North Atlantic region. The evolution of its marine environment is significantly affected by the cold and warm water masses in the West Greenland current. In this paper, the principal component analysis (PCA) method is used to study the main diatom species in the sediments of the DA06-139G hole in Disko Bay, West Greenland, in order to reveal the influence of the change of the intensity of the West Greenland current on the marine environment during the period of 5000-3800a BP since 5000a BP. The strength of the polar cold water mass carried by the East Greenland cold current is weaker, while the North Atlantic warm water mass is stronger and the marine environment in Disko Bay area is warmer. During the period of .3800-2000a BP, the polar cold water mass in the West Greenland current has been gradually strengthened. At this time, the climate of Disko Bay turns cold slowly, and the sea ice cover area increases gradually, especially after 650 years BP, the score of the sample on principal component axis I increases significantly, which indicates that the climate of Disko Bay is obviously cold. The strength of the polar cold water mass from the East Greenland cold current is significantly enhanced. The changes in the strength of the polar chilled water mass indicated by the diatom record and the score of the sample on principal component I since the mid-late Holocene in the Gulf of Disko and the temperature of the Greenland ice core; and The sea ice changes have good consistency, The results show that the characteristics of the current are closely related to the atmospheric temperature, sea ice and other environmental factors.
【作者單位】： 寧波大學(xué)地理與空間信息技術(shù)系;國(guó)家海洋局第一海洋研究所海洋沉積與環(huán)境地質(zhì)國(guó)家海洋局重點(diǎn);華東師范大學(xué)地理信息科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目,41302134號(hào),41406209號(hào) 南北極環(huán)境綜合考查與評(píng)估專(zhuān)項(xiàng),CHINARE2016-03-02號(hào) 寧波大學(xué)學(xué)科項(xiàng)目,xkl13d210號(hào)
【分類(lèi)號(hào)】：P731.16;Q949.2
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本文編號(hào)：2037179