AGS/EAR-PRF: Confronting Multi-scale Complexity in the Dynamics of Regional U.S. Land-atmosphere Coupling Energetics and Their Links to Climate Variability and Change

由加州大学欧文分校的Famiglietti和Pritchard教授主持，首席研究员（P.I.）将寻求澄清的作用，陆面耦合在有组织的对流和降雨的演变在美国中部（US）。该战略将采用新的方法技术，在一个独特的多尺度虚拟实验室中分离和测量陆地和大气之间能量交换系统的组成部分。通过使用单个分量放大来解构陆-气耦合反馈中的非线性复杂性，并归因于响应，作者将开发一个整体的物理框架，并将其应用于以下问题：1。在美国中部，陆面耦合在产生和维持中尺度对流系统和夏季降水中的作用是什么？2.在区域和全球水文学的背景下，明确解决陆地异质性对于真实地代表中尺度陆地对流相互作用有多重要？3.灌溉驱动的水文气候反馈对驱动美国中部对流降水的机制的现实表示是否稳健？4.中尺度对流及其与自然和人工水循环的相互作用在未来气候中将如何变化？陆面反馈是否在调节响应中起作用？智力优势：美国中部的陆气耦合在调节当地天气和气候方面起着特别关键的作用。水文循环将如何响应灌溉和气候变化的人为影响取决于一套复杂的陆面能量交换机制，其耦合行为是难以理解的。在这个水文界面的知识需要深入了解其非线性敏感性，通过控制多尺度数值实验，包括非本地和全球的反馈柱能量的链接。作者着眼于美国中部的水文气候及其对灌溉和气候变化的反应，试图在这方面取得进展。该研究建立在作者的博士经验基础上，应用大气物理学的基本原理来研究常规和超参数化全球气候模型模拟中的中尺度对流，气候变化和气溶胶-云相互作用。共同指导战略结合了Famiglietti教授和Pritchard教授在大气和水文科学方面的不同专业知识，以解决他们各自研究重点的界面上的前沿科学问题。更广泛的影响：更广泛的影响活动和共同指导计划将加强加州大学欧文分校研究和研究生教育中的陆-气耦合，并与美国中部陆-气界面的决策者进行合作。私家侦探将帮助启动一个研究生研讨会系列，重点是土地-大气的相互作用，汇集水文和气候科学专家，以促进跨学科研究和前沿科学思想的交叉授粉。私家侦探将扩大与政策制定者，研究人员和教育工作者的公共伙伴关系，这些伙伴关系是由美国国家科学基金会在美国中部的大气过程多尺度建模中心开发的，通过公共宣传活动将研究与相关利益相关者直接联系起来。这些努力将有助于向科学界和公众传播新的研究成果和经验，并指导P.I.自身的专业发展。

Hosted by Professors Famiglietti and Pritchard at the University of California, Irvine, the principal investigator (P.I.) will seek to clarify the role of land surface coupling in the evolution of organized convection and rainfall in the Central United States (US). The strategy will be to employ novel methodological techniques to isolate and measure components of the energy exchange system between the land and atmosphere, in a uniquely multi-scale virtual laboratory. By deconstructing nonlinear complexities in land-atmosphere coupling feedbacks using individual component amplification, and attributing responses, the author will develop a holistic physical framework and apply it to the following questions:1. What is the role of land surface coupling in generating and sustaining mesoscale convective systems and summer precipitation in the Central US?2. How critical is explicitly resolved land heterogeneity for realistically representing mesoscale land-convection interactions in the context of regional and global hydrology?3. Are irrigation-driven hydro-climate feedbacks robust to a realistic representation of the mechanisms that drive convective precipitation in the Central US?4. How will mesoscale convection and its interaction with the natural and manmade water cycles change in future climate? Do land-surface feedbacks play a role in mediating the response?Intellectual Merit:Land-atmosphere coupling in the Central US plays an especially critical role in mediating local weather and climate. How the hydrological cycle will respond to the anthropogenic influences of irrigation and climate change depends on a complex set of land-surface energy exchange mechanisms whose coupled behavior is difficult to understand. Advancing knowledge at this hydrologic interface requires insight into its nonlinear sensitivities through controlled multi-scale numerical experiments, including links to non-local and global feedbacks on column energetics. Focusing on Central US hydro-climate and its response to irrigation and climate change, the author seeks to make progress on this front. The research builds on the author's doctoral experience applying fundamental principles of atmospheric physics to investigate mesoscale convection, climate change, and aerosol-cloud interactions in simulations from conventional and super-parameterized global climate models. The co-mentoring strategy combines the diverse expertise of Professors Famiglietti and Pritchard in atmospheric and hydrologic science to address frontier scientific questions at the interface of their individual research foci.Broader Impacts:The broader impact activities and co-mentoring plan will strengthen land-atmosphere coupling in research and graduate level education at the University of California, Irvine, and with policy makers who have a stake in the land-atmosphere interface in the Central US. The P.I. will help launch a graduate seminar series focused on land-atmosphere interactions, bringing together experts in hydrology and climate science to foster interdisciplinary research and cross-pollination of frontier science ideas. The P.I. will expand public partnerships with policy makers, researchers, and educators that have been developed by the NSF Center for Multiscale Modeling of Atmospheric Processes in the Central US to directly link the research to relevant stakeholders through public outreach activities. These efforts will help spread new research results and experience to both the scientific community and general public, and guide the P.I.'s own professional development.