Climate Systems in Transition: Winds and Wind-Driven Circulation During the Mid-Cenozoic Global Cooling

转型中的气候系统：新生代中期全球变冷期间的风和风驱动环流

• 批准号: 0136829
• 负责人: David Rea
• 金额: $ 35.05万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2006-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0136829&HistoricalAwards=false
• 关键词: Climate; Systems; Transition; Winds; Wind

Summary: This proposal request support to study evolution of wind strength and development and migration of the Intertropical Convergence Zone in the North Pacific Ocean during the late Paleogene and Neogene. The study will use grain size, isotope data and composition of dust in a series of marine cores in the tropical and subtropical Pacific to trace wind strength and dust source (Asian or American) during the Oligocene to Recent. The goals of the project are to determine the evolution of strength of zonal winds, and to trace the development and migration of the Intertropical Convergence Zone through time. In addition the study will better constrain the provenance of the American dust component and determine the changes in the latitude of the facies change between Asian-source and American source dust in the Pacific Basin.

总结：该建议要求支持研究古近纪晚期和新近纪北太平洋风强度演化和热带辐合带的发展和迁移。 这项研究将利用热带和亚热带太平洋一系列海洋岩芯中的尘埃颗粒大小、同位素数据和成分，追踪渐新世至近代的风力和尘埃来源（亚洲或美洲）。 该项目的目标是确定纬向风强度的演变，并跟踪热带辐合带的发展和迁移。 此外，该研究将更好地约束美国粉尘组分的物源，并确定亚洲源和美国源粉尘在太平洋盆地相变的纬度变化。