Climate Change Data Portal
| Collaborative Research: An ultra-high-resolution record of drought, flood, and coupled ocean-atmosphere climate oscillations in Holocene and late Quaternary Californian sediments | |
| 项目编号 | 1304275 |
| Wolfgang Berger | |
| 项目主持机构 | University of California-San Diego Scripps Inst of Oceanography |
| 开始日期 | 2013-09-01 |
| 结束日期 | 2016-08-31 |
| 英文摘要 | With this award from the Chemistry Major Research Instrumentation Program, Professor Barbara Finlayson-Pitts from University of California Irvine and colleagues Michael Kleinman, Sergey Nizkorodov, Donald Blake and Eric Saltzman will acquire an atmospheric pressure QTrap mass spectrometer that is capable of highly sensitive and specific measurements of both gases and particles. The instrument is capable of carrying out tandem experiments involving molecular analysis of secondary organic aerosols (SOA) using nano-desorption electrospray ionization (nano-DESI), extractive electrospray ionization (EESI), atmospheric solids analysis probe (ASAP) ionization and atmospheric pressure ionization (API). The proposal is aimed at enhancing research and education at all levels, especially in areas such as (a) determination of the products of isoprene photooxidation and the effects of relative humidity on the aerosol composition; (b) real-time measurements of the composition of SOA particles formed in complex volatile organic compounds (VOCs)-nitrogen dioxide-ozone mixtures; (c) elucidation of the efficiency of aerosol mass spectrometry (AMS) for measurements of organic nitrates by comparison to Fourier Transform infrared (FTIR) measurements; (d) measurement of VOCs in tobacco smoke; (e) measurement of nitrogen-containing VOCs from isoprene photooxidation; (f) determination of products of photochemical oxidations of aqueous phase acids and aldehydes; (g) real-time measurement of gaseous precursors and products in an aerosol flow tube during new particle formation and growth; (h) real-time measurement of gaseous p-cymene from the reaction of alpha-pinene with ozone, OH, and nitrate; (i) measurement of oxygen/carbon ratios of SOA and comparison to results from high-resolution electrospray ionization mass spectrometry; (i) real-time measurements of acetone and other oxygenated organic species during a cruise that is part of a North Atlantic gas flux study as well as other research activities. Mass Spectrometry (MS) is one of the key analytical methods used to identify and characterize small quantities of chemical species embedded in complex matrices. In a typical experiment, the components flow into a mass spectrometer where they are ionized into the parent ion and its fragment ions and their masses are measured. This highly sensitive technique allows detection and determination of the structure of molecules in a complex mixture. An instrument with tandem capability provides additional structural identification power through further fragmentation of ions produced in the spectrometer. The instrumentation provided by this award will provide faculty and students in several departments the opportunity to pursue research projects using modern instrumentation not heretofore available at the institution. The research will impact not only the field of Chemistry but also provide important knowledge of atmospheric phenomena. The instrument will also be used in several laboratory courses to train significant numbers of students in the use of this important analytical technique. |
| 学科分类 | 08 - 地球科学;0806 - 海洋科学 |
| 资助机构 | US-NSF |
| 项目经费 | 48737 |
| 项目类型 | Standard 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/74852 |
| 推荐引用方式 GB/T 7714 | Wolfgang Berger.Collaborative Research: An ultra-high-resolution record of drought, flood, and coupled ocean-atmosphere climate oscillations in Holocene and late Quaternary Californian sediments.2013. |
| 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 |
| [Wolfgang Berger]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Wolfgang Berger]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Wolfgang Berger]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。
