P2C2: Collaborative Research: Dust Deposition, Paleo-Export Production, and Migration of the (ITCZ) Through the Last Glacial Cycle in the West-Central Pacific (Line Islands)

P2C2：合作研究：中西部太平洋（莱恩群岛）末次冰河周期期间的灰尘沉积、古出口生产和（ITCZ）迁移

基本信息

批准号：
1502889
负责人：
Jerry McManus
金额：
$ 44.14万
依托单位：
Columbia University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-05-15 至 2019-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1502889&HistoricalAwards=false
关键词：
P2C2 Collaborative Research Dust Deposition

项目摘要

This project's goal is to examine variations in dust deposition throughout the last 150,000 years in the west-central Pacific from a suite of ocean sediment cores recently recovered from the Line Islands Ridge and constituting a roughly north-south transect across the modern Inter-Tropical Convergence Zone (ITCZ) near 160°W longitude.During the interval of interest for the project, the Earth's climate shifted from full glaciation to one of the warmest interglacials in the last million years. Following that peak interglacial, global climate varied through multiple 20,000 year cycles while trending toward a return to full glacial conditions at the last glacial maximum (LGM) before the last deglaciation and Holocene interglacial. Windblown dust plays important roles in influencing and recording climate. In the atmosphere, dust contributes to the planetary albedo and serves as cloud condensation nuclei. In the ocean, dust may fertilize biological productivity through the addition of crucial trace nutrients, and provide ballast for the sinking of particles, thus enhancing carbon export from the surface ocean and drawing down atmospheric carbon dioxide. In deep-sea sediments, the amount, location and type of dust deposition provide clues for reconstructing its past sources, pathways, magnitude and removal processes. These removal processes include the shifting rain belts of the ITCZ that follows the thermal equator over the tropical ocean.The project will advance understanding of natural variations in climate, dust, productivity, and the hydrological cycle, and will promote training and learning for several early career scientists as well as undergraduate students. The research team will also leverage their research and education efforts in collaboration with middle school and high school science teachers through the Lamont-Doherty Earth Observatory's Earth2Class program.

该项目的检查是最近从线岛山脊中恢复的Diment核从完全的冰川化转变为一个Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe Ofe One One One One One One One One One One One One One One One One One One One stnterglacials。在最后的冰川最大值上返回到全冰川条件的循环中，尘埃在影响和记录的气候中起着重要的作用。 Felligal的生产力添加至关重要的痕量营养素。过去的来源e删除过程包括遵循热带海洋热赤道的ITCZ的变化雨带。该项目将提高对气候，尘土飞扬和水文学周期中民族变化的了解，并将促进培训和学习的培训和学习一些职业生涯的科学家和高中科学老师通过Lamont-Doherty Earth Abtervatory的计划。