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| PHYTOPLANKTON COMMUNITY STRUCTURE, CARBON STOCK, CARBON EXPORT AND CARBON FLUX: WHAT ROLE DO DIATOMS PLAY IN THE NORTH PACIFIC AND NORTH ATLANTIC OCEANS? | |
| 项目编号 | 80NSSC17K0700 P00002 |
| COLLIN ROESLER | |
| 开始日期 | 2017-09-19 |
| 结束日期 | 2020-09-18 |
| 英文摘要 | Theinfluence of fine particles or atmospheric aerosols on the earth’s atmosphere isinsufficiently understood to allow for precise predictions of present andfuture atmospheric state. Organic aerosols (OA) are an important yet uncertaincomponent of atmospheric aerosol and a better understanding of OA’s impact will depend on the ability of numerical models to represent theformation and evolution of OA. The objective of the proposed research is,hence, to develop and implement a numerically efficient, next-generation modelto simulate the formation and evolution of OA in the atmosphere that will leadto improved predictions of the abundance and properties of atmospheric aerosolsin air quality and earth system models.TheOA model that will be developed as part of this study, named simpleSOM, willuse a numerically efficient framework to represent the chemistry,thermodynamics and microphysics of OA. This next-generation model will be builtupon and tested against a variety of laboratory data. The model will include:(a) semi-volatile and reactive primary OA (POA), (b) secondary OA (SOA)formation from semi-volatile, intermediate-volatility and volatile organiccompounds, (c) multi-phase, multi-generational aging that includesfunctionalization and fragmentation reactions, (d) low-volatility SOA formationfrom autooxidation and oligomerization reactions, (e) influence of vapor walllosses encountered in laboratory SOA formation experiments, (f) aqueouschemistry of OA, and (g) phase state of OA. The simpleSOM model will be coupledto MOSAIC (particle dynamics model) and integrated into three-dimensionalregional atmospheric model (WRF-Chem). A variety of box model and 3D modelsimulations will be carried out to assess improvement in predictions of OA anddevelop insights into the sources, pathways and processes that govern theevolution of the size, mass, composition and properties of atmospheric OA.ThesimpleSOM model, in terms of the processes included, far exceeds the detail andcapability of OA models present in the current generation of earth system models andhence allows for an improved representation of the formation and atmosphericprocessing of OA. The scientific contributions from theproposed work will improve our understanding and model representation ofaerosol processes, specifically those associated with the formation, growth,transformation and loss of organic aerosols and help study the interactionsamong organic aerosols, clouds, precipitation and solar radiation. This willhelp the atmospheric science communities betterunderstand the complex interplay between aerosols, atmospheric composition andradiative impacts. |
| 学科分类 | 03 - 天文学;1107 - 航空航天工程;11 - 工程与技术 |
| 资助机构 | US-NASA |
| 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/73368 |
| 推荐引用方式 GB/T 7714 | COLLIN ROESLER.PHYTOPLANKTON COMMUNITY STRUCTURE, CARBON STOCK, CARBON EXPORT AND CARBON FLUX: WHAT ROLE DO DIATOMS PLAY IN THE NORTH PACIFIC AND NORTH ATLANTIC OCEANS?.2017. |
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