Anthropogenic Aerosol Effects on Cirrus Clouds

人为气溶胶对卷云的影响

• 批准号: 0333016
• 负责人: Joyce Penner
• 金额: $ 47.68万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-11-15 至 2007-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0333016&HistoricalAwards=false
• 关键词: Anthropogenic; Aerosol; Effects; Cirrus; Clouds

This study examines the effects of anthropogenic aerosols on ice processes in the atmosphere. The PIs will use a global atmospheric general circulation model (GCM) coupled with an aerosol model. Parameterizations of heterogeneous ice nucleation processes (immersion freezing and deposition nucleation) will be developed and implemented together with an existing parameterization for homogeneous freezing in the climate model. The climate forcing due to the anthropogenic effects on cirrus clouds will be estimated, and the importance of heterogeneous versus homogeneous ice nucleation in the upper troposphere will be addressed. The effect of aircraft emitted soot particles will be studied in comparison with soot and other sources of ice nuclei from the earth's surface. The broader impacts of this project include: (1) that this is a policy-relevant study that will be widely disseminated because of its direct relevance to uncertainties in climate forcing and, hence, climate change, and will thereby benefit society; (2) that results learned here will be incorporated into the aerosol microphysics course offered by Dr. Penner; and (3) that graduate students will be trained through the project.

本研究探讨人为气溶胶对大气中冰过程的影响。pi将使用一个全球大气环流模式（GCM）和一个气溶胶模式。非均质冰成核过程（浸没冻结和沉积成核）的参数化将与气候模式中均匀冻结的现有参数化一起开发和实施。将估算由于人为影响对卷云造成的气候强迫，并讨论对流层上层非均匀冰核与均匀冰核的重要性。将研究飞机排放的烟尘颗粒的影响，并将其与地球表面的烟尘和其他冰核来源进行比较。本项目的更广泛影响包括：(1)这是一项与政策相关的研究，由于其与气候强迫的不确定性直接相关，因此将广泛传播，从而有益于社会；(2)在此学到的成果将被纳入Penner博士开设的气溶胶微物理课程；(3)研究生将通过该项目得到培训。