Late Quaternary variability of surface-water characteristics and terrigenous input in the (sub-) polar North and South Pacific: A biomarker approach

如《新应用》所述，总体目标是利用有机地球化学指标重建北太平洋和南太平洋(亚极)地表水特征和陆源(尘埃)输入的变异性和联系，以及它们与全球气候变化的关系。拟议研究的主要目标是：(1)基于烯酮类化合物(UK 37)的海表面温度重建；(2)基于高度分枝的异戊二烯类化合物(HBIS，IP25)的海冰覆盖重建；(3)使用特定生物标志物(烷酮、甾醇-特别是油菜甾醇和双甾醇、短链正构烷烃)和海洋有机碳(OC)的通量速率重建生产力；以及(4)利用长链正构烷烃、甾醇(油菜醇、β-谷甾醇)和陆源有机碳的通量速率输入陆源有机碳。生物标志物记录将与微古生物(硅藻、甲藻等)有关。和矿物学(石英、长石等)在BIPOMAC关于沉积物岩芯的其他分项目中获得的古环境指标，以及来自格陵兰岛和南极冰芯的尘埃/铁和二氧化碳记录。与BIPOMAC的其他分项目一起，这项研究的结果将大大增加我们对(亚)极南、北太平洋气候变异性、纬向和半球间遥相关以及高纬度在驱动和放大全球气候变异性方面的作用的了解。2009年7月/8月进行的Sonne Expeiton“INOPEX”是该项目的一个重要里程碑，在此期间，发现了独特的核心材料，这或多或少保证了计划研究的成功。

As outlined in the New Application, overall goal is the reconstruction of the variability of and linkages between surface-water characteristics and terrigenous (dust) input in the (sub-) polar North and South Pacific and their relationship to global climate change, using organicgeochemical proxies. Primary targets of the proposed study are: (1) sea-surface temperature reconstruction based on alkenones (Uk 37), (2) reconstruction of sea-ice cover based on highly-branched isoprenoids (HBIs, IP25), (3) reconstruction of productivity using specific biomarkers (alkenones, sterols - especially brassicasterol and dinosterol, short-chain nalkanes) and flux rates of marine organic carbon (OC), and (4) input of terrigenous OC using long-chain n-alkanes, sterols (campesterol, ß-sitosterol) and flux rates of terrigenous OC. The biomarker records will be related to micropaleontological (diatoms, dinoflagellates, etc.) and mineralogical (quartz, feldspars, etc.) paleoenvironment proxies obtained within other BIPOMAC subprojects on the sediment cores as well as dust/Fe and CO2 records from Greenland and Antarctic ice cores. Together with the other BIPOMAC subprojects, the results of this study will significantly increase our knowledge on (sub-) polar South and North Pacific climate variability, zonal and inter-hemispheric teleconnections, as well as the role of the High Latitudes in driving and amplifying global climate variability. During the SONNE Expediton “INOPEX” carried out in July/August 2009, a major milestone of this project, unique core matrial has been recovered which more or less guarantee the success of the planned studies.