Convective Cloud Urban Boundary-layer Experiment

对流云城市边界层实验

• 批准号: 2114198
• 负责人: Prathap Ramamurthy
• 金额: $ 66.33万
• 依托单位: CUNY City College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2114198&HistoricalAwards=false
• 关键词: Convective; Cloud; Urban; Boundary; layer

The research seeks to leverage a planned field campaign to investigate convective storms in the coastal urban area around Houston, Texas. Commonly observed convective systems in the region cause severe damage to life and property in the coastal urban area. Excess heat and aerosols released from the urban environment and sea breeze impact the dynamics of convective cloud systems. However, the interaction and feedback between urban areas and convective cloud systems are not well understood. The study will use enhanced atmospheric observations and numerical modeling to study how urban areas impact the formation, journey, and dissipation of convective cloud cells. The research will link human activities in coastal urban environments to convective cloud systems by conducting a field experiment in coordination with the planned Tracking Aerosol-Convection Interactions Experiment (TRACER) sponsored by the Department of Energy at the same area. In addition, the investigators will develop a comprehensive urban modeling framework that will integrate atmospheric dynamics and aerosol impacts with key anthropogenic influences. The project will involve education and outreach activities for university students and the local public as well as train undergraduate and graduate students in Earth System science and develop new courses and course modules related to urban climate systems. The research team will also work closely with the Texas Air Quality Commission as well as TRACER scientists from various US universities and national laboratories for sharing observations from a variety of platforms to understand convective storms over the area.The experimental campaign will concentrate on the ocean-urban-rural interface. The campaign will continuously monitor the evolution of cloud characteristics, surface-atmosphere forcing, boundary layer state, aerosol forcing, sea-breeze circulation, and precipitation. The setup will aid in understanding coastal-urban land-atmosphere interactions, an area of research with significant knowledge gaps and their connections with convective cloud systems. Numerical models constrained by observations will be used to investigate urban-cloud interaction and thunderstorms to understand and quantify the impacts of various urban forcings on the evolution and characteristics of convective storms. The primary objectives of the study are: 1) To understand how critical urban boundary layer processes impact convective cloud formation. 2) To investigate the impact of urbanization on storm formation, movement, and dissipation. 3) To investigate the feedback of convective clouds in urban atmospheric and surface energy processes.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项研究旨在利用一项计划好的实地活动来调查德克萨斯州休斯顿附近沿海城市地区的对流风暴。该地区常见的对流系统对沿海城市地区的生命财产造成严重损害。城市环境和海风释放的多余热量和气溶胶影响对流云系统的动力学。然而，城市地区与对流云系统之间的相互作用和反馈尚未得到很好的理解。该研究将使用增强的大气观测和数值模拟来研究城市地区如何影响对流云单体的形成、行进和消散。该研究将通过与能源部在同一地区赞助的计划中的跟踪气溶胶-对流相互作用实验（TRACER）协调进行现场实验，将沿海城市环境中的人类活动与对流云系统联系起来。此外，研究人员将开发一个综合的城市建模框架，将大气动力学和气溶胶影响与关键的人为影响结合起来。该项目将涉及对大学生和当地公众的教育和推广活动，以及对地球系统科学的本科生和研究生进行培训，并开发与城市气候系统有关的新课程和课程模块。研究小组还将与德克萨斯州空气质量委员会以及来自美国各大学和国家实验室的TRACER科学家密切合作，分享来自各种平台的观测结果，以了解该地区的对流风暴。实验活动将集中在海洋与城乡结合部。该活动将持续监测云特征、地面大气强迫、边界层状态、气溶胶强迫、海风环流和降水的演变。该装置将有助于理解沿海-城市陆地-大气相互作用，这是一个存在重大知识缺口的研究领域，以及它们与对流云系统的联系。受观测约束的数值模式将用于研究城市-云相互作用和雷暴，以了解和量化各种城市强迫对对流风暴的演变和特征的影响。本研究的主要目标是：1)了解城市边界层的关键过程如何影响对流云的形成。2)探讨城市化对风暴形成、运动和消散的影响。3)探讨对流云在城市大气和地表能过程中的反馈。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。