CleanCloud: Clouds and climate transitioning to post-fossil aerosol regime

CleanCloud：云和气候过渡到后化石气溶胶状态

• 批准号: 10091700
• 金额: $ 28.44万
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: EU-Funded
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=10091700
• 关键词: CleanCloud; Clouds; climate; transitioning; post

Aerosol-cloud interactions (ACI) remain the largest source of uncertainty in past, present, and future radiative forcing, impeding credible climate projections. ACI effects are expected to change dramatically as we enter a post-fossil world, characterized by strong reductions in anthropogenic aerosol emissions but with increasingly larger impacts from natural aerosols. Although we expect cleaner clouds compared to today, ACI in this post-fossil state may considerably differ from preindustrial conditions, owing to shifts in climate and changes in sources region characteristics. CleanCloud will address the major gaps impeding robust ACI assessments, improve their representation in current and next generation kilometer-scale climate models, quantify and understand their regional and temporal effects, and how they will evolve in the transition to the post-fossil regime. To accomplish this, CleanCloud will 1) carry out targeted field experiments in European climate hotspots; 2) develop state-of-the-art algorithms and analysis tools to obtain new proxies and diagnostics for key ACI-related processes; 3) contribute to the calibration and validation of upcoming satellite missions in coordination with the satellite community; 4) improve and better constrain kilometer- and large-scale climate models using advanced machine learning, data assimilation and model calibration, confronting perturbed physics ensembles with existing and new satellite and in-situ data; and 5) assess the role of aerosols in the life cycle of convective systems, focusing on precipitation formation and the impacts on the hydrological cycle, and 6) enhance the exploitation of data centres, measurement programs, international campaigns, laboratory studies, and models. With these, CleanCloud will profoundly strengthen European Research on climate change, significantly contribute to upcoming climate assessments, and benefit society through models that enable improved weather and seasonal predictions

气溶胶-云相互作用（ACI）仍然是过去、现在和未来辐射强迫的最大不确定性来源，阻碍了可靠的气候预测。随着我们进入后化石时代，ACI 的影响预计将发生巨大变化，其特点是人为气溶胶排放量大幅减少，但自然气溶胶的影响越来越大。尽管我们预计云层会比今天更清洁，但由于气候变化和源头区域特征的变化，这个后化石时代的 ACI 可能与工业化前的条件有很大不同。 CleanCloud 将解决阻碍稳健 ACI 评估的主要差距，提高其在当前和下一代公里级气候模型中的代表性，量化和了解其区域和时间影响，以及它们在向后化石政权过渡过程中将如何演变。为了实现这一目标，CleanCloud 将 1) 在欧洲气候热点地区开展有针对性的实地实验； 2）开发最先进的算法和分析工具，以获得关键 ACI 相关流程的新代理和诊断； 3) 与卫星界协调，为即将到来的卫星任务的校准和验证做出贡献； 4）利用先进的机器学习、数据同化和模型校准，利用现有和新的卫星和现场数据来应对扰动的物理系综，改进并更好地约束公里级和大尺度气候模型； 5) 评估气溶胶在对流系统生命周期中的作用，重点关注降水形成及其对水文循环的影响，6) 加强对数据中心、测量计划、国际活动、实验室研究和模型的利用。通过这些，CleanCloud 将深刻加强欧洲对气候变化的研究，为即将到来的气候评估做出重大贡献，并通过改进天气和季节预测的模型造福社会