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AGS-PRF: Aerosols in Shallow Tropical Convection: Impact on Cloud Microphysics and Precipitation

AGS-PRF：浅层热带对流中的气溶胶：对云微物理和降水的影响

基本信息

批准号：
1431053
负责人：
Alison Nugent
金额：
$ 8.6万
依托单位：
Nugent Alison D
依托单位国家：
美国
项目类别：
Fellowship Award
财政年份：
2014
资助国家：
美国
起止时间：
2014-12-01 至 2016-11-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1431053&HistoricalAwards=false
关键词：
AGS PRF Aerosols Shallow Tropical

项目摘要

Atmospheric aerosols are very small particles that are suspended in the air. Many are comprised of dust, smoke or sea salt from the Earth's land and ocean surfaces, while others are formed through chemical reactions in the atmosphere. Aerosols likely play a role in forming clouds and precipitation, but the relative importance of aerosols versus other mechanisms is unclear. The impact of aerosol forcing on the climate system remains one of the largest unknowns in the atmospheric science community. This Postdoctoral Research Fellowship will allow an early-career researcher the opportunity to study the role of aerosols in shallow tropical convection and precipitation. The project will be a combined observational and theoretical exercise, with analysis of research aircraft data and studies making use of an advanced numerical model. Better knowledge of how aerosols affect clouds and precipitation would have a significant impact on understanding of the weather and climate system, leading to better forecasts. The researcher also plans to conduct mentoring and outreach, thereby enhancing public understanding of science.Observational evidence from the DOMEX (Dominica Experiment) field campaign shows a strong relationship between aerosol and cloud number concentration, cloud droplet size, and surface precipitation amount. This relationship will be further explored using aircraft observations from past and planned field campaigns along with numerical model simulations. The project will be carried out as a combination of two separate but closely related studies. The first is a bulk statistical approach with a large number of in-situ aircraft observations. The second is a theoretical study on microphysical processes and rates of cloud and precipitation formation using the Weather Research and Forecasting (WRF) model. The researcher will work in close collaboration with the author of one of the main microphysical schemes used in the WRF model.

大气气溶胶是悬浮在空气中的非常小的颗粒。其中许多是由地球陆地和海洋表面的灰尘、烟雾或海盐组成的，而另一些则是通过大气中的化学反应形成的。气溶胶可能在云和降水的形成中发挥作用，但气溶胶与其他机制的相对重要性尚不清楚。气溶胶强迫对气候系统的影响仍然是大气科学界最大的未知数之一。这项博士后研究奖学金将允许早期职业研究人员有机会研究气溶胶在热带浅层对流和降水中的作用。该项目将结合观测和理论练习，分析研究飞机数据，并利用先进的数值模型进行研究。更好地了解气溶胶如何影响云和降水，将对了解天气和气候系统产生重大影响，从而实现更好的预报。该研究人员还计划进行指导和推广，从而提高公众对科学的理解。DOMEX （Dominica Experiment）野外活动的观测证据表明，气溶胶与云数浓度、云滴大小和地表降水量之间存在很强的关系。这种关系将通过过去和计划中的野外战役的飞机观测以及数值模型模拟进一步探索。该项目将结合两项独立但密切相关的研究进行。第一种是采用大量现场飞机观测的批量统计方法。第二部分是利用天气研究与预报（WRF）模式对云和降水形成的微物理过程和速率进行理论研究。该研究人员将与WRF模型中使用的一个主要微物理方案的作者密切合作。