The missing link to understand Plio-Pleistocene changes in southeast Pacific oceanography, productivity, and El Nino behavior - SE trade wind strength and its dust transport

了解上更新世东南太平洋海洋学、生产力和厄尔尼诺行为变化的缺失环节——东南信风强度及其粉尘输送

• 批准号: 12897841
• 负责人: Professor Dr. Ralf Tiedemann
• 金额: --
• 依托单位: Alfred-Wegener-Institut (AWI) Helmholtz-Zentrum für Polar- und Meeresforschung
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/12897841?language=en
• 关键词: missing; link; understand; Plio; Pleistocene

One of the fundamental missing links in understanding Pliocene and Pleistocene changes in southeast Pacific oceanography, productivity and El Nino behavior as well as associated variations in thermocline depth, upwelling and dust fertilisation is the knowledge of changes in southest trade wind strength and dust transport on millennial and orbital time scales. Our study aims to reconstruct changes in South American continental aridity, dust supply and trade wind strength at ODP Sites 1237 and 1239, as both sites underlie the modern path of eolian transport from the Atacama desert in northern Chile and Peru. Our investigations will concentrate on four key intervals that are considered to reflect major steps in late Neogene climate evolution: the late Pleistocene amplification of glacial/interglacial variability (0-1 Ma), the Plio-PIeistocene transition (1.5-2 Ma), the Pliocene intensification of the Northern Hemisphere Glaciation (2.4- 3.1 Ma), and the Pliocene warm period (4-5 Ma).

在了解上新世和更新世东南太平洋海洋学的变化，生产力和厄尔尼诺行为，以及相关的温跃层深度，上升流和灰尘施肥的变化的基本缺失环节之一是知识的变化在southwestern贸易风强度和灰尘运输千年和轨道的时间尺度。我们的研究旨在重建南美大陆干旱，粉尘供应和贸易风强度ODP站点1237和1239的变化，因为这两个网站的基础上的现代路径的风从阿塔卡马沙漠在北方智利和秘鲁。我们的调查将集中在四个关键的时间间隔，被认为是反映在晚第三纪气候演变的主要步骤：晚更新世放大的冰川/间冰期的变化（0-1马），上新世-更新世过渡（1.5-2马），上新世加强北方半球冰川（2.4- 3.1马），上新世温暖期（4-5马）。

项目成果

Tracking the equatorial front in the eastern equatorial Pacific Ocean by the isotopic and faunal com

• DOI: 10.1016/j.marmicro.2011.01.001
• 发表时间: 2011-04
• 期刊: Fuel and Energy Abstracts
• 作者: D. Rincón-Martínez;S. Steph;F. Lamy;A. Mix;R. Tiedemann

Early Pliocene increase in thermohaline overturning: A precondition for the development of the modern equatorial Pacific cold tongue

• DOI: 10.1029/2008pa001645
• 发表时间: 2010-06
• 期刊: Paleoceanography
• 作者: S. Steph;R. Tiedemann;M. Prange;J. Groeneveld;M. Schulz;A. Timmermann;D. Nürnberg;C. Rühlemann

A rainy northern Atacama Desert during the last interglacial

• DOI: 10.1029/2010gl045728
• 发表时间: 2010-12-10
• 期刊: GEOPHYSICAL RESEARCH LETTERS
• 影响因子: 5.2
• 作者: Contreras, Sergio;Lange, Carina B.;Kuypers, Marcel M. M.
• 通讯作者: Kuypers, Marcel M. M.

More humid interglacials in Ecuador during the past 500 kyr linked to latitudinal shifts of the equatorial front and the Intertropical Convergence Zone in the eastern tropical Pacific

• DOI: 10.1029/2009pa001868
• 发表时间: 2010-06
• 期刊: Paleoceanography
• 作者: D. Rincón-Martínez;F. Lamy;S. Contreras;G. Leduc;E. Bard;Cornelia Saukel;T. Blanz;A. Mackensen;R. Tiedemann

Distribution and provenance of wind-blown SE Pacific surface sediments

东南太平洋表层风沉积物的分布和来源

• DOI: 10.1016/j.margeo.2010.12.006
• 发表时间: 2011
• 期刊: Marine Geology
• 影响因子: 2.9
• 作者: Saukel;J. B. W;Tiedemann;C. Vogt
• 通讯作者: C. Vogt