本文關(guān)鍵詞： 鹽度 西太平洋暖池 厄爾尼諾-南方濤動(dòng) 北太平洋熱帶水 印尼穿越流　出處：《海洋地質(zhì)與第四紀(jì)地質(zhì)》2017年03期 　論文類型：期刊論文

【摘要】：印尼穿越流作為連接西太平洋和印度洋的唯一通道,調(diào)節(jié)著這兩個(gè)大洋之間的熱量和水汽的交換,繼而在熱帶乃至全球氣候變化中扮演著重要的角色。本文對(duì)來自于帝汶海內(nèi)印尼穿越流出口處SO18460鉆孔中浮游有孔蟲Globigerinoides ruber和Pulleniatina obliquiloculata殼體的Mg/Ca比值和氧同位素進(jìn)行再分析,重建了末次冰期以來表層和溫躍層海水溫度、鹽度以及溫躍層深度的變化,并將其與區(qū)域古氣候記錄對(duì)比以探討其意義。結(jié)果表明,末次冰期以來,SO18460孔的表層和溫躍層海水鹽度均與區(qū)域降雨量記錄變化一致,顯示降雨信號(hào)以海水鹽度的形式通過水體混合由表層向溫躍層的傳輸。自早全新世以來,SO18460孔的表層海水溫度在28℃左右波動(dòng),可能是受西太平洋暖池的影響;同時(shí),溫躍層海水溫度始終低于22℃可能指示厄爾尼諾-南方濤動(dòng)處于類厄爾尼諾狀態(tài);而溫躍層海水溫度持續(xù)下降、溫躍層深度持續(xù)變淺,一方面可能是對(duì)早全新世以來類厄爾尼諾事件頻發(fā)的響應(yīng),另一方面也可能歸因于熱帶輻合帶的南向移動(dòng)導(dǎo)致區(qū)域降雨增加、以及東亞冬季風(fēng)驅(qū)使南海表層流的加強(qiáng)等因素對(duì)印尼穿越流表層流的抑制。冰期-間冰期尺度上,SO18460孔溫躍層海水溫度與北半球夏季太陽輻射量變化步幅一致,可能是北太平洋熱帶水借助棉蘭老島流在蘇拉威西�；烊胗∧岽┰搅魉隆�
[Abstract]:The Indonesian current acts as the only way to connect the western Pacific to the Indian Ocean, regulating the exchange of heat and water vapor between the two oceans. In this paper, the Mg/Ca ratios and oxygen isotopes of planktonic foraminifera Globigerinoides ruber and Pulleniatina obliquiloculata shells from the SO18460 borehole at the exit of Indonesia current in the Timor Sea are reanalyzed. The changes of sea water temperature, salinity and thermocline depth since the last glacial period were reconstructed and compared with regional paleoclimate records to study their significance. Since the last glacial period, the salinity of the surface layer and thermocline of Hole so 18460 is consistent with the regional rainfall record. The results show that the rainfall signal is transported from the surface layer to the thermocline layer in the form of salinity of sea water. The temperature of the surface water of the so 18460 hole in the Hole so 18460 has fluctuated at about 28 鈩，

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