Climate Change Data Portal
| EAR-PF: Light- and Iron-Mediated Oxidation Mechanisms of Organic Matter | |
| 项目编号 | 1854875 |
| Claresta Joe-Wong | |
| 项目主持机构 | Joe-Wong, Claresta Michelle |
| 开始日期 | 2019-08-01 |
| 结束日期 | 07/31/2022 |
| 英文摘要 | Dr. Claresta Joe-Wong has been awarded a postdoctoral fellowship to work at Lawrence Berkeley National Laboratory on understanding carbon cycling between the atmosphere and inland waters, which is of increasing importance due to global climate change. Inland waters are a crucial component of the global carbon cycle because they transport organic carbon from soils to oceans; bury it in sediments; and release it as carbon dioxide, yet the natural processes that oxidize organic carbon to carbon dioxide in inland waters are not well understood. This project will characterize one of the most important yet poorly constrained of these processes, the oxidation of dissolved organic carbon in sunlight when iron is present. This research, which links these mechanisms at the molecular level to broad climatic changes, will be used to inform undergraduate lesson plans that link chemical principles to earth sciences processes. Undergraduates will be engaged in summer research internships and expose them to innovative techniques in the earth sciences. The postdoctoral fellow will benefit from broadening her research perspective and methods as well as the mentoring experience gained for her future career. Complexation with iron can enhance the reactivity of organic carbon with light, resulting in the release of carbon dioxide. However, the plethora of oxidation pathways involving short-lived radical intermediates makes it difficult to predict the effects of iron. The proposed work will experimentally characterize the reaction mechanisms and reactive intermediates of iron-mediated photo-oxidation using ultrafast spectroscopy with sub-picosecond resolution. Spectroscopic characterization of the photoreactivity of model carboxylates will be paired with laboratory experiments determining the kinetics and products of iron-mediated photolysis of dissolved organic carbon collected from the East River watershed in Colorado and Arctic Long-Term Ecological Research site in Alaska. Ultimately, integrating a mechanistic understanding of the photo-oxidation of dissolved organic carbon with large-scale models of carbon fluxes may promote a more comprehensive conceptual framework of carbon dynamics. This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria. |
| 资助机构 | US-NSF |
| 项目经费 | $236,000.00 |
| 项目类型 | Continuing Grant |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/211809 |
| 推荐引用方式 GB/T 7714 | Claresta Joe-Wong.EAR-PF: Light- and Iron-Mediated Oxidation Mechanisms of Organic Matter.2019. |
| 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 |
| [Claresta Joe-Wong]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Claresta Joe-Wong]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Claresta Joe-Wong]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。
