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| Atmosphere-Induced Short Period Variations of Earth Rotation (ASPIRE) | |
| 项目编号 | http://gepris.dfg.de/gepris/projekt/244025929?language=en |
| Dr. HenrykDobslaw (Applicant) | |
| 项目主持机构 | Helmholtz-Zentrum Potsdam |
| 开始日期 | 2014 |
| 英文摘要 | Brown carbon (BrC) is a special class of light-absorbing organic matter in atmospheric aerosol that has potential direct and indirect climate effects. The formation of BrC is hypothesized to be related to the oxidation and/or oligomerization of organic compounds in biomass burning plumes or photochemical smog leading to relatively high-molecular weight (MW), low-volatility polycarboxylic compounds. This project seeks to better understand the chemical nature of BrC and address hypotheses regarding BrC sources. First, an unique analytical method that allows simultaneous thermal/optical characterization as well as mass spectrometric analysis (soft and hard ionization) of the evolved gases will be developed and applied to a comprehensive collection of standard and real-world aerosol samples. The method will integrate a carbon analyzer developed at the Desert Research Institute (DRI) in Reno,Nevada, enhanced for multi-elemental and spectral detection with photo-ionization time-of-flight mass spectrometers (TOF-MS) developed at the University of Rostock (UR). BrC and black carbon (BC) can then be quantified from spectral light absorption measurements and studied with molecular patterns/source signatures in gases evolved at different heating temperatures. The relationship of BrC to various organic groups will be investigated. A dynamic temperature ramping will be explored to better isolate BrC and other organic components for a more specific characterization. Finally, a library consisting of two-dimensional MS-thermograms for major aerosol types, including urban and rural environmental particulate matter and laboratory-generated combustion and secondary organic aerosol, will be established. This library will facilitate source attribution when coupled with advanced chemometric analysis. |
| 学科分类 | 0801 - 地理学;0804 - 地球物理学和空间物理学;0806 - 海洋科学;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/244025929?language=en |
| 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/74776 |
| 推荐引用方式 GB/T 7714 | Dr. HenrykDobslaw .Atmosphere-Induced Short Period Variations of Earth Rotation (ASPIRE).2014. |
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