LATE QUATERNARY PALEOCEANOGRAPHIC RECORDS IN THE SOUTHERN OKHOTSK SEA
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摘要: 鄂霍次克海是太平洋第二大边缘海,在西北太平洋水文环境中扮演重要角色。综合分析了鄂霍次克海南部T00孔沉积物的多种替代性指标,揭示了鄂霍次克海晚第四纪以来的环境变化受季节性海冰变化、大气循环模式、陆源物质通量和表层生产力的共同影响。对比放射虫Cycladophora davisiana的含量曲线与LR04氧同位素记录,该孔沉积物可划分为氧同位素1-7期,底部年龄约为250 ka。C.davisiana在间冰期的高含量表明鄂霍次克海中层水是北太平洋中层水的主要源区。蛋白石和有机碳的分析显示鄂霍次克海表层生产力在冰消期突然增大,随后在间冰期逐渐下降,冰期普遍较低。C/N比值曲线的分析说明鄂霍次克海的有机质沉积物主要来源于海洋。沉积物粒度的分析揭示鄂霍次克海冰期时陆源粗颗粒含量较低,至冰消期粗颗粒含量突然增加,而在间冰期陆源粗颗粒含量较高。
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关键词:
- 放射虫C.davisiana /
- 表层生产力 /
- 陆源物质输入 /
- 晚第四纪 /
- 鄂霍次克海
Abstract: The Sea of Okhotsk is the second largest marginal sea of the Pacific, and plays a significant role in the hydrology of the northwestern Pacific. We processed and analyzed multi-proxies of the sediment of core T00 from the southern Sea of Okhotsk. The results show that the environmental changes in the Sea of Okhotsk are characterized by a coupled interplay between seasonal sea ice dynamics, atmospheric circulation patterns, terrigenous flux, and surface productivity during late Quaternary. The stratigraphic MIS1 to MIS7 since~250 ka of core T00 has been recognized by comparing the percentage curve of Cycladophora davisiana with the LR04 benthic δ18O stack. The higher percentage of C.davisiana during interglacial intervals indicates that the Sea of Okhotsk is the source region of the North Pacific Intermediate Water Mass. The primary productivity in the southern Sea of Okhotsk, indexed by contents of opal and total organic carbon, is relatively higher during interglacials than during glacials, and increases rapidly during deglacials. The oceanic origin of the organic matters in core T00 is figured out by the C/N ratio analysis. The content of terrigenous coarse grain in the Sea of Okhotsk is lower in glacials than in interglacials and increases rapidly in deglacials. -
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[1] Nürnberg D, Tiedemann R.Environmental change in the Sea of Okhotsk during the last 1.1 million years[J].Paleoceanogr., 2004, 19:1-23.
[2] Anikiev V V, Dudarev O V, Kolesov G M, et al.Factors of mesoscale variability in the distribution of the particulate matter and chemical elements in the Amur River estuary Sea of Okhotsk waters[J].Chem.Geol., 2001, 39(1):64-87.
[3] Parkinson C L.The impact of the Siberian High and Aleutian Low on the sea ice cover of the Sea of Okhotsk[J].Ann.Glaciol., 1990, 14:226-229.
[4] Ponomorev V, Trusenkova O, Ustinova E, et al.Interannual variations of oceanographic and meteorological characteristics in the Sea of Okhotsk[J].PICES Sci., 1999, 12:31-40.
[5] Tchaibana Y, Honda M, Takeuchi K.The abrupt decrease of the sea ice over the southern part of the Sea of Okhotsk in 1989 and its relation to the recent weakening of the Aleutian Low[J].Meteorol.Soc.Jpn., 1996, 74:579-584.
[6] Wang W C, Li K.Precipitation fluctuation over semi-arid region in northern China and the relationship with El Nino/Southern Oscillation[J].Clim., 1990, 3:769-783.
[7] 刘焱光, 石学法, 吕海龙.日本海、鄂霍次克海和白令海的古海洋学研究进展[J].海洋科学进展, 2004, 10:519-530.[LIU Yanguang, SHI Xuefa, LÜ ; Hailong.Advances in paleoceanographic studies on the Japan Sea,Okhotsk Sea and Bering Sea[J]. Adv. Mar. Sci., 2004,10:519-530.]
[8] 中国第二次北极科学考察队. 中国第二次北极科学考察报告[R]. 北京:海洋出版社, 2004.[Second Chinese National Arctic Research Expedition Team. Report of the second Chinese national Arctic research expedition[R]. Beijing:China Ocean Press, 2004.] [9] Stax P, Stein R. Long-term changes in the accumulation of organic carbon in Neogene sediments, Ontong Java Plateau[C]//Proc.ODP Sci. Res., 1993:573-579.
[10] Mortlock R A, Froelich P N. A simple method for the rapid determination of biogenic opal in the pelagic marine sediments[J]. Deep Sea Res., 1989, 36(9):1415-1426.
[11] 谢昕, 郑洪波, 陈国成, 等. 古环境研究中深海沉积物粒度测试的预处理方法[J]. 沉积学报, 2007, 25(5):684-692. [XIE Xin, ZHENG Hongbo, CHEN Guocheng, et al. Pretreatment method of grain size measurement of marine sediments in paleoenvironment research[J]. Acta Sedimentol. Sinica, 2007, 25(5):684-692.]
[12] Abelmann A, Brathauer U, Gersode L, et al. Radiolarian-based transfer function for the estimation of sea-surface temperatures in the Southern Ocean(Atlantic sector)[J]. Paleoceanogr., 1999, 14(3):410-421.
[13] Ciesielskin P F, Bj rklund K R. Ecology, morphology, stratigraphy, and the paleoceanographic significance of Cycladophora davisiana. Part Ⅱ:Stratigraphy in the North Atlantic (DSDP Site 609) and Labrador Sea (ODP Site 646B)[J]. Mar. Micropaleont., 1995, 25:67-86.
[14] Brathauer U, Abelmann A, Gersonde R. Calibration of Cycladophora davisiana events versus oxygen isotope stratigraphy in the subantarctic Atlantic Ocean-a stratigraphic tool for carbonate-poor Quaternary sediments[J]. Mar. Geol., 2001, 175:167-181.
[15] 同济大学海洋地质系. 古海洋学概论[M]. 上海:同济大学出版社,1989:26-29.[Department of Marine Geology of Tongji University. Introduction to Paleoceanography[M]. Shanghai:Tongji University Press, 1989:26 -29.]
[16] 王汝建, 陈荣华. 白令海晚第四纪的Cycladophora davisiana: 一个地层学工具和冰期亚北极太平洋中层水的替代物[J]. 中国科学D辑, 2005, 35(2):149-157. [WANG Rujian, CHEN Ronghua. Cycladophora davisiana (radiolarian) in the Bering Sea during the Late Quaternary:A stratigraphic tool and proxy of the glacial Subarctic Pacific Intermediate Water[J]. Sci. in China (Series D), 2005, 35(2):149-157.]
[17] Okazaki Y, Takahashi K, Yoshitani H, et al. Radiolarians under the seasonally sea-ice covered conditions in the Okhotsk Sea:flux and their implications for paleoceanography[J]. Mar. Micropaleont., 2003, 49:195-230.
[18] Morley J J, Heusser L E, Shackleton N J. Late Pleistocene/Holocene radiolarian and pollen records from sediments in the Sea of Okhotsk[J]. Paleoceanogr., 1991, 6:121-131.
[19] Lisiecki L, Raymo M. A Pliocene-Pleistocene stack of 57 globally distributed benthic δ18O records[J]. Paleoceanogr., 2005, 20:1-17.
[20] Yasuda I. The origin of the North Pacific Intermediate Water[J]. J. Geophys. Res., 1997, 102:893-909.
[21] Talley L D. An Okhotsk Sea water anomaly:Implications for ventilation in the North Pacific[J]. Deep Sea Res. I, 1991, 38(1):171-190.
[22] Seki O, Yoshikawa C, Nakatsuka T, et al. Fluxes, source and transport of organic matter in the western Sea of Okhotsk:stable carbon isotopic ratios of n-alkanes and total organic carbon[J]. Deep Sea Res., I, 2006, 53:253-270.
[23] Abelmann A, Nimmergut A. Radiolarians in the Sea of Okhotsk and their ecological implication for paleoenvironmental reconstructions[J]. Deep-Sea Res., Ⅱ, 2005, 52:2302-2331.
[24] Ohkushi K, Itaki T, Nemoto N. Last Glacial Holocene change in intermediate-water ventilation in the northwestern Pacific[J]. Quat. Sci. Rev., 2003, 22:1477-1484.
[25] 李建, 王汝建. 南海北部一百万年以来的表层古生产力变化:来自ODPl144站的蛋白石记录[J]. 地质学报, 2004, 78(2):228-233. [LI Jian,WANG Rujian. Paleoproductivity variability of the Northern South China Sea during the past 1Ma:the opal record from ODP Site 1144[J]. Acta Geol. Sinica, 2004, 78(2):228-233.]
[26] Hovan S A, Rea D K, Pisias N G. Late Pleistocene continental climate and oceanic variability recorded in northwest Pacific sediments[J]. Paleoceanogr., 1991, 6(3):349-370.
[27] Wakatsuchi M, Martin S. Satellite observations of the ice cover of the Kuril basin region of the Okhotsk Sea and its relation to the regional oceanography[J]. Geophys. Res., 1990, 95(13):393-410.
[28] 王汝建, 李霞, 肖文申, 等. 白令海北部陆坡100 ka来的古海洋学记录及海冰的扩张历史[J]. 地球科学-中国地质大学学报, 2005, 30(5):550-558. [WANG Rujian,LI Xia, XIAO Wenshen,et a1. Paleoceanographic records and sea ice extension history on the slope of the northern Bering Sea over the last 100 kaBP[J]. Earth Sci.-J. China University of Geosciences, 2005, 30(5):550-558.]
[29] 肖文申, 王汝建, 叶瑛. 热带东太平洋晚第四纪的古海洋及古气候记录[J]. 地球科学-中国地质大学学报, 2006, 31(2):143-150. [XIAO Wenshen, WANG Rujian,Ye Ying. Late Quaternary paleoceanographic and paleoclimatic records in the tropical east Pacific Ocean[J]. Earth Sci.J. China University of Geosciences, 2006, 31(2):143-150.]
[30] Sakamoto T, Ikehara M, Aoki K,et al. Ice-rafted debris (IRD)-based sea-ice expansion events during the past 100 kyrs in the Okhotsk Sea[J]. Deep-Sea Res. Ⅱ, 2005, 52:2275-2301.
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