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The effects of particle formation on global aerosol and climate

颗粒形成对全球气溶胶和气候的影响

基本信息

批准号：
NE/D01395X/1
负责人：
Kenneth Carslaw
金额：
$ 28.94万
依托单位：
University of Leeds
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
起止时间：
2007 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FD01395X%2F1
关键词：
effects particle formation global aerosol

项目摘要

Particle number concentration is one of the least well constrained properties of the global atmospheric aerosol. Our lack of understanding of what controls particle concentrations greatly limits our ability to quantify the effect of aerosol on climate, which is one of the most important factors in recent climate change. This proposal deals with particle formation (nucleation) and its role in controlling global particle number concentrations. Many observations have been made that demonstrate the importance of particle formation for local particle concentrations, the particle size distribution, and cloud condensation nuclei. Global model calculations conducted at Leeds strongly suggest that particle formation events contribute substantially to total particle concentrations on a global scale, but little is known about their effect on the subset of particles that is relevant for the climate. We will use a global aeroosl model, constrained by a large number of observations of particle formation, to quantify the contribution of new particles to climate-relevant particles. The outcomes of this project will be (i) a greatly improved understanding of the global budget of climate-relevant particle number concentration; (ii) model schemes to simulate particle formation on a global scale for inclusion in the UK climate model; and (iii) an improved understanding of how climate-relevant particle concentrations have changed over the industrial period. The scientific results and model developments will have a significant bearing on the further development of global aerosol and climate models. In particular, they will feed directly into the NERC-Met Office UK Chemistry and Aerosol (UKCA) project to develop new aerosol microphysics schemes for the UK Unified Model.

粒子数浓度是全球大气气溶胶中最不受约束的特性之一。我们对控制颗粒浓度的因素缺乏了解，这极大地限制了我们量化气溶胶对气候影响的能力，而气溶胶是近年来气候变化的最重要因素之一。该提案涉及颗粒形成（成核）及其在控制全球颗粒数浓度方面的作用。许多观测表明粒子形成对局部粒子浓度、粒子大小分布和云凝结核的重要性。在利兹进行的全球模型计算强烈表明，粒子形成事件在全球范围内的总粒子浓度的贡献很大，但鲜为人知的是，他们对粒子的子集，是相关的气候的影响。我们将使用一个全球aeroosl模型，通过大量的粒子形成的观测约束，以量化新粒子对气候相关粒子的贡献。该项目的成果将是：（一）大大提高对气候相关颗粒数浓度全球预算的理解;（二）模拟全球范围内颗粒形成的模型方案，以纳入英国气候模型;以及（三）提高对工业时期气候相关颗粒浓度变化的理解。科学成果和模式发展将对全球气溶胶和气候模式的进一步发展产生重大影响。特别是，他们将直接进入NERC-Met Office UK Chemistry and Aerosol（UKCA）项目，为英国统一模型开发新的气溶胶微物理方案。