An Analysis of Mineral Aerosol Transport from Asia to the North Pacific During the Last 18,000 Yr.

过去 18,000 年从亚洲到北太平洋的矿物气溶胶输送分析。

• 批准号: 8716432
• 负责人: Margaret Leinen
• 金额: $ 19.25万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-03-01 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8716432&HistoricalAwards=false
• 关键词: Analysis; Mineral; Aerosol; Transport; Asia

A B S T R A C T This research concerns the transport of mineral dust from the arid regions of Asia to the open North Pacific Ocean over the last 18,000 years. New analysis will be carried out on selected deep sea cores to improve the resolution and the coverage of the data. Meteorological models of transport will be used to assess the variation with time of the latitudinal distribution of mineral dust transport and deposition, the likely variation in the source areas, and the speed of transport. These calculations will be based upon climatological fields simulated by NCAR's Community Climate Model obtained under the COHMAP project. The transport results will be compared with sedimentological results on the latitudinal distribution of the minerology, grain size distribution and mass accumulation rates over the past 18,000 years. Together, the climatological and sedimentological research will allow an assessment of the capability of transport models and refine our understanding of climate variations deduced from geological evidence.

A B S T R A C T 这项研究涉及矿物粉尘的运输， 亚洲干旱地区到开阔的北太平洋， 一万八千年前 新的分析将在选定的 深海岩芯以提高分辨率和覆盖范围 数据 将使用交通气象模型来评估 的纬向分布随时间的变化 矿物粉尘的运输和沉积，可能的变化， 来源地和运输速度。 这些 计算将基于模拟的气候场 根据COHMAP获得的NCAR社区气候模型 项目 运输结果将与 沉积学结果的纬度分布 矿物学、粒度分布和物质积累速率 在过去的一万八千年里 在一起，气候和 沉积学研究将允许评估 运输模型的能力，并完善我们对 根据地质证据推断出的气候变化。