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.

这项研究检查了人为气溶胶对大气中冰过程的影响。 PI将使用全球大气通用循环模型（GCM）以及气溶胶模型。 将开发和实施异质冰成核过程的参数（浸入冻结和沉积成核），并与气候模型中的现有参数化一起进行。 将估计由于人为作用对卷卷云而引起的气候强迫，并且将解决对流层上部对流层中异质性与均质冰成核的重要性。 与地球表面的烟灰和其他冰核的来源相比，将研究发射烟灰颗粒的飞机的效果。 该项目的更广泛影响包括：（1）这是一项与政策相关的研究，该研究将被广泛传播，因为它与气候强迫和气候变化中的不确定性的直接相关，因此将使社会受益； （2）在这里学到的结果将纳入Penner博士提供的气溶胶微物理课程； （3）该研究生将接受该项目的培训。