SGER: Photoacoustic Measurement of Aerosol Light Absorption for the Coastal Stratocumulus Imposed Perturbation Experiment

SGER：沿海层积云强加扰动实验中气溶胶光吸收的光声测量

• 批准号: 0340423
• 负责人: William Arnott
• 金额: $ 5.49万
• 依托单位: Nevada System of Higher Education, Desert Research Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0340423&HistoricalAwards=false
• 关键词: SGER; Photoacoustic; Measurement; Aerosol; Light

This Small Grants for Exploratory Research (SGER) project involves direct measurements aloft of aerosol light absorption in the visible range (678 nm) using a novel photoacoustic (PA) instrument during the Coastal STRatocumulus Imposed Perturbation Experiment (C-STRIPE). Airborne measurements for C-STRIPE will be made from the Office of Naval Research Center for Interdisciplinary Remotely-Piloted Aircraft Studies (ONR/CIRPAS) Twin Otter research aircraft over three weeks in July 2003 off the coast of Monterey, California. Flights will also be performed over the heavily polluted San Joaquin Valley, California continental area to examine black carbon emanating from smoke and urban/industrial plumes. By addition of this new capability to the C-STRIPE airborne instrument suite the P.I. will provide a unique qualitative measurement of aerosol light absorption aloft to assess aerosol-cloud interactions in terms of radiative forcing and cloud dynamics. An important airborne intercomparison experiment will also be conducted between this PA instrument and two other distinct techniques for measuring ambient atmospheric light absorption due to aerosols. Results from this study should increase understanding of climate forcing by aerosol impacts on radiative forcing in haze and/or cloud layers - major uncertainties currently limiting the representativeness of global climate models.

这个探索性研究（SGER）项目的小赠款涉及直接测量高空气溶胶光吸收在可见光范围（678 nm）使用一种新型的光声（PA）仪器在沿海平流层积云施加扰动实验（C-STRIPE）。 C-STRIPE的空中测量将于2003年7月在加州蒙特雷海岸外的海军跨学科遥控飞机研究中心（ONR/CIRPAS）双水獭研究飞机上进行，为期三周。 飞行还将在污染严重的圣华金河谷，加州大陆地区进行，以检查烟雾和城市/工业羽流产生的黑碳。 通过在C-STRIPE机载仪器套件中增加这种新功能，将提供高空气溶胶光吸收的独特定性测量，以评估气溶胶-云在辐射强迫和云动力学方面的相互作用。 一个重要的空中相互比较实验也将进行这种PA仪器和其他两个不同的技术测量环境大气光吸收由于气溶胶。 这项研究的结果应增加对气溶胶对烟霾和/或云层辐射强迫影响的气候强迫的理解-目前限制全球气候模式代表性的主要不确定性。