A Comparison of Aerosol Organic Carbon Measurements and Models in the Free Troposphere at Mauna Loa Observatory (MLO)

莫纳罗亚天文台 (MLO) 自由对流层气溶胶有机碳测量和模型的比较

• 批准号: 0441274
• 负责人: Barry Huebert
• 金额: --
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-04-15 至 2011-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0441274&HistoricalAwards=false
• 关键词: Comparison; Aerosol; Organic; Carbon; Measurements

This project will continue and enhance an ongoing measurement program at Mauna Loa Observatory (MLO) to routinely collect and analyze aerosol filter samples for non-sea salt sulfate (NSS), nitrate, sodium, ammonium, and nitric acid by now adding semi-continuous measurements of organic aerosol mass (OM). Instrumentation acquired under this award will make operationally defined measurements of organic carbon (OC) at MLO where air characteristic of the free troposphere can routinely be sampled. In addition, a number of seasonal intensive field measurement campaigns will be conducted at MLO to characterize OM in with even greater detail. The behavior and variability of the OC/NSS ratio will be determined over several years and through collaboration with other groups the results will be compared with numerical simulations using a variety of models. Results from this study will lead to an improved understanding of the role of organic carbon compounds in tropospheric aerosol chemistry, and a better quantification of organic aerosol mass will enable more accurate representations of organic matter in model treatments. The broader impacts of this work include continuing a long-term heritage of highly climate relevant observations at MLO, producing important insights on how to better constrain chemical transport models and reduce uncertainties in climate model simulations, and providing research and educational opportunities for students at the University of Hawaii.

该项目将继续并加强莫纳罗亚天文台 (MLO) 正在进行的测量计划，通过现在添加半连续测量，定期收集和分析气溶胶过滤器样品中的非海盐硫酸盐 (NSS)、硝酸盐、钠、铵和硝酸。有机气溶胶质量 (OM) 的测量。 根据该奖项获得的仪器将在 MLO 上对有机碳 (OC) 进行操作上定义的测量，在那里可以定期对自由对流层的空气特征进行采样。 此外，MLO 还将开展一系列季节性密集实地测量活动，以更详细地描述 OM 的特征。 OC/NSS 比率的行为和变化将在几年内确定，并通过与其他小组的合作，将结果与使用各种模型的数值模拟进行比较。 这项研究的结果将有助于更好地了解有机碳化合物在对流层气溶胶化学中的作用，并且更好地量化有机气溶胶质量将使模型处理中的有机物能够更准确地表示。 这项工作的更广泛影响包括继续在 MLO 进行与气候高度相关的观测的长期传承，就如何更好地限制化学品传输模型和减少气候模型模拟中的不确定性提出重要见解，并为 MLO 的学生提供研究和教育机会。夏威夷大学。