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Assessments of the Impact of Tropospheric Aerosols on Actinic Fluxes, Photosynthetically Available Radiation (PAR), and Radiative Forcing

对流层气溶胶对光化通量、光合有效辐射 (PAR) 和辐射强迫影响的评估

基本信息

批准号：
1637279
负责人：
Irina Sokolik
金额：
$ 57.84万
依托单位：
Georgia Tech Research Corporation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-09-01 至 2020-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1637279&HistoricalAwards=false
关键词：
Assessments Impact Tropospheric Aerosols Actinic

项目摘要

As solar radiation travels through the atmosphere it can interact with small particles known as aerosols. These particles can scatter and absorb solar radiation, which affects the amount of radiation that reaches the Earth's surface. Solar radiation interactions with aerosols can also affect the chemistry of the atmosphere, such as through the creation and destruction of ozone. To better improve understanding and modeling of these interactions, the research team will use data collected by research aircraft over the past two decades alongside numerical modeling to answer questions about how aerosols interact with solar radiation over a range of altitudes, solar angles, and geographic settings. The results of the project will help to improve climate models. Additional benefits will be the education and training of a graduate student and the development of a database that can be used by other researchers.The research team will improve understanding of the impact of tropospheric aerosols on actinic fluxes and atmospheric composition by integrating and analyzing observed spectral actinic fluxes. The NCAR Charged-coupled devices Actinic Flux Spectroradiometer (CAFS) has flown on numerous field campaigns over the past two decades and the measurements from CAFS plus aerosol characterization measurements offers a unique opportunity to examine the impact of aerosols on photochemistry. The CAFS data, along with concurrent sub-orbital and satellite data, and modeling will be used to address the four main objectives: 1) Develop a new Aerosol Attenuated Actinic Flux (AAAF) database, 2) Perform an in-depth analysis of actinic fluxes in different aerosol-laden conditions, 3) Perform an analysis of the impact of smoke aerosol on the photosynthetically available radiation (PAR) and the UV-direct radiative forcing, and 4) Develop recommendations for climate models.

当太阳辐射穿过大气层时，它会与称为气溶胶的小颗粒相互作用。这些粒子可以散射和吸收太阳辐射，从而影响到达地球表面的辐射量。太阳辐射与气溶胶的相互作用也会影响大气的化学性质，例如通过臭氧的产生和破坏。为了更好地理解和建模这些相互作用，研究小组将使用研究飞机在过去二十年中收集的数据以及数值建模来回答有关气溶胶如何在高度，太阳角度和地理环境范围内与太阳辐射相互作用的问题。该项目的成果将有助于改进气候模型。其他好处将是教育和培训一名研究生，并开发一个可供其他研究人员使用的数据库，研究小组将通过整合和分析观测到的光谱光化通量，提高对对流层气溶胶对光化通量和大气成分影响的认识。在过去的二十年里，NCAR的电荷耦合器件光化通量光谱仪（CAFS）已经在许多实地活动中飞行，CAFS的测量加上气溶胶特性测量提供了一个独特的机会来研究气溶胶对光化学的影响。 CAFS数据、沿着亚轨道数据和卫星数据以及建模将用于实现四个主要目标：1）开发新的气溶胶衰减光化通量（AAAF）数据库，2）对不同气溶胶负载条件下的光化通量进行深入分析，3）分析烟雾气溶胶对光合有效辐射（PAR）和紫外直接辐射强迫的影响，（4）为气候模式提出建议。