Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 0617677 |
| Where does desert dust originate? Geomorphic and climatic control on the evolution of dust sources in the Mojave Desert, USA. | |
| Mark Sweeney | |
| 主持机构 | Nevada System of Higher Education, Desert Research Institute |
| 开始日期 | 2006-09-15 |
| 结束日期 | 2007-10-31 |
| 资助经费 | 80165(USD) |
| 项目类别 | Standard Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | GEOMORPHOLOGY & LAND USE DYNAM |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | Deserts are by nature dusty environments, and much of the current literature and scientific research has asserted that dry lake beds, or playas, are the major source of dust despite the fact that they make up a very small proportion of the desert landscape. In the eastern Mojave Desert, southwestern United States, ancient lake sediments contributed to the formation of sand dunes and dust during a climatic transition about 10,000 years ago. However, a large amount of dust accumulations are younger in age, suggesting that landforms other than playas have been significant sources of dust in the past. The overall goal of this proposal is three-fold: 1) determine which desert landforms provide sources of dust by using new wind tunnel technology, the Portable In Situ Wind Erosion Lab (PI-SWERL), 2) determine if the dust sources have changed over time by using modern dust sources as analogs to predict which landforms emitted dust in the past, and by comparing temporal changes in the composition of dust and potential sources, and 3) determine if the record of dust in desert soils corresponds to the age of sand dune activity, using optically stimulated luminescence technology to determine the ages of sand grains within the soil dust. From this research, more information will be learned regarding the types of landforms and soil properties associated with dust emissions in desert environments, and how these sources might change in response to geomorphic processes and climate change. Dust is important from a scientific standpoint because dust additions to soils control soil formation, soil hydrology, landscape evolution, and the ecologic function of desert plants. Dust generation is a societal concern related to visibility, safety, and health issues. Broader impacts of this research include collaboration with other universities and researchers, continued development of age control and wind erosion technologies and techniques, and the support of university students who will gain valuable field and scientific experience. The results of this research will be presented at a major conference, published in peer-reviewed scientific journals, and provided to city/road planners and park and recreational area managers for their use. |
| 来源学科分类 | Geosciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=0617677 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/342396 |
| 推荐引用方式 GB/T 7714 | Mark Sweeney.Where does desert dust originate? Geomorphic and climatic control on the evolution of dust sources in the Mojave Desert, USA..2006. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Mark Sweeney]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Mark Sweeney]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Mark Sweeney]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
