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

北太平洋和南太平洋（亚）极地表水特征和陆源输入的晚第四纪变化：生物标记方法

基本信息

批准号：
131255896
负责人：
Professor Dr. Rüdiger Stein
金额：
--
依托单位：
Zentrum für Marine Umweltwissenschaften (MARUM)
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/131255896?language=en
关键词：
Late Quaternary variability surface water

项目摘要

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.

正如新应用中概述的那样，总体目标是利用有机地球化学代理，重建（亚）极地南北太平洋地表水特征和陆源（尘埃）输入之间的变异性和联系，以及它们与全球气候变化的关系。建议研究的主要目标是：(1)基于烯酮的海面温度重建（Uk 37），(2)基于高支化异戊二烯类（HBIs, IP25）的海冰覆盖重建，(3)基于特定生物标志物（烯酮、甾醇——尤其是油菜甾醇和dino甾醇、短链烷烃）和海洋有机碳（OC）通量的生产力重建，以及(4)基于长链正构烷烃、甾醇（油菜甾醇、ß-谷甾醇）和陆源OC通量的陆源OC输入。生物标志物记录将与其他BIPOMAC子项目中沉积岩心的微古生物学（硅藻、鞭毛藻等）和矿物学（石英、长石等）古环境代用物以及格陵兰和南极冰芯的尘埃/铁和二氧化碳记录有关。与其他BIPOMAC子项目一起，本研究的结果将显著增加我们对（亚）极南太平洋和北太平洋气候变率、纬向和半球间遥相关以及高纬度地区在驱动和放大全球气候变率方面的作用的认识。在2009年7月/ 8月进行的SONNE探险“INOPEX”期间，该项目的一个重要里程碑，独特的岩心材料已被回收，这或多或少保证了计划研究的成功。