Climate Change Data Portal
| Desert aerosol aging in polluted environments and impact on its optical properties | |
| 项目编号 | http://gepris.dfg.de/gepris/projekt/378741973 |
| Professor Dr. KonradKandler (Applicant) | |
| 项目主持机构 | Technische Universität Darmstadt |
| 开始日期 | 2017 |
| 英文摘要 | Chemical weathering of silicate rocks at the Earths surface consumes atmospheric carbon dioxide and thus has the potential to influence global climate. In particular, the weathering of basalt rocks could be an important sink for carbon dioxide. Our understanding of what controls the chemical weathering rates of rocks has been limited by our inability to measure rates over the timescales that are relevant to land-forming processes. During the last two decades this situation has improved due to the development of terrestrial cosmogenic nuclide techniques, able to quantify denudation and thus extract rates of chemical weathering over millennial timescales and longer. Basaltic terrains have received little attention in this work, due in part to a lack of suitable target elements for cosmogenic nuclide measurements. However, recent progress has shown cosmogenic Mn-53 is able to quantify denudation rates in iron oxides, which means that it can be measured in basalts. Our overall aim is to take advantage of this new ability and to quantify the importance of basalt weathering as a global atmospheric carbon dioxide sink. To achieve this we will collect samples from two climatically diverse environments: the Paraná flood basalts in humid southern Brazil and the Etendeka flood basalts in arid Namibia. These rocks were originally extruded as one body but were split in two and separated due to the opening of the Atlantic Ocean. While they are lithologically the same, they experience very different amounts of precipitation and both are affected by dramatic temperature gradients. Cosmogenic Mn-53 concentrations in the rock samples will reveal rates of denudation and subsequently the influence that climatic factors have on rates of weathering. Additional investigations into the relationships between chemical and physical weathering, coupled with rates of denudation from nearby non-basaltic lithologies, will allow us to develop a broad understanding of the rates at which basalts weather and the factors that control these rates. |
| 学科分类 | 0805 - 大气科学;08 - 地球科学 |
| 资助机构 | DE-DFG |
| 项目类型 | Research Grants |
| URL | http://gepris.dfg.de/gepris/projekt/378741973 |
| 国家 | DE |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/73671 |
| 推荐引用方式 GB/T 7714 | Professor Dr. KonradKandler .Desert aerosol aging in polluted environments and impact on its optical properties.2017. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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