Collaborative Research: Evaluation of Aerosol-Cloud-Radiation Processes and Feedbacks in the Alaskan Arctic

合作研究：阿拉斯加北极气溶胶云辐射过程和反馈的评估

• 批准号: 0649549
• 负责人: Xiquan Dong
• 金额: $ 9.98万
• 依托单位: University of North Dakota Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0649549&HistoricalAwards=false
• 关键词: Collaborative; Research; Evaluation; Aerosol; Cloud

The climate of the Arctic is changing rapidly for reasons that are poorly understood. It is generally recognized that low-level cloud cover is a controlling factor in any feedbacks that amplify the rate of change. However, any assessment of the relevant mechanisms at play requires accurate long-term statistical representations of Arctic cloud properties and variability. Past efforts used long-term seasonal data to quantify indirect aerosol amplification to Arctic surface warming: thermal insulation of the surface by low-level Arctic stratus is increased in the presence of mid-latitude aerosol pollution. This new effort aims to expand our understanding of this phenomenon, and Arctic clouds in general, by analyzing long-term data sets collected at the Department of Energy North Slope of Alaska - Adjacent Arctic Ocean, and National Oceanic and Atmospheric Administration, long-term monitoring sites near Barrow, Alaska. Activities will include a) development of new, and refinements to existing, remote-sensing cloud retrieval algorithms for application to Arctic studies; b) derivation of long-term seasonal databases of pollution, low-cloud microstructures, phase, precipitation, and radiative properties, and c) isolation of the component mechanisms that control cloud, aerosol and precipitation interactions in the Arctic. These efforts will result in a deepened understanding of the response of Arctic haze phenomena to a projected warmer, wetter Arctic. The broader impacts of this study are development of new techniques for studying Arctic climate and component processes, web-based dissemination of results of analysis of changing cloud conditions in the Arctic, collaborations between different government agencies and university researchers, undergraduate and graduate student training, and contribution to the broad goals of the 2007 to 2008 International Polar Year.

北极的气候正在迅速变化，原因较低。 人们普遍认为，低水平的云覆盖物是放大变化率的任何反馈中的控制因素。 但是，对起作用相关机制的任何评估都需要对北极云特性和可变性进行准确的长期统计表示。 过去的努力使用了长期的季节性数据来量化间接气溶胶扩增以北极表面变暖：在存在中纬度气溶胶污染的情况下，通过低级北极地层通过低级北极地层进行了表面隔热。 这项新的努力旨在通过分析阿拉斯加能源部北坡（Energy North Slope）收集的长期数据集（邻近的北极海洋）以及国家海洋和大气管理局，阿拉斯加巴罗（Barrow）附近的长期监测地点，通过分析能源部北坡（Energy North Slope）收集的长期数据集，扩大我们对这一现象的了解。 活动将包括a）开发新的，并改进了现有的，遥感的云检索算法，以应用于北极研究； B）衍生污染，低云微结构，相位，降水量和辐射特性的长期季节性数据库，以及c）分离北极中控制云，气溶胶和降水相互作用的组件机制。 这些努力将使人们对北极雾现象对预计较温暖的北极的反应深入了解。 这项研究的更广泛影响是开发用于研究北极气候和组成过程的新技术，基于网络的北极条件分析结果的传播，不同政府机构与大学研究人员之间的合作，本科生和研究生培训之间的合作以及对2007年至2008年国际极性的广泛目标的贡献。