Collaborative Research: Atmospheric Ridging over Western North America in Current and Future Climates

合作研究：当前和未来气候下北美西部的大气脊

基本信息

批准号：
2206997
负责人：
Paul Loikith
金额：
$ 25.51万
依托单位：
Portland State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-07-01 至 2025-06-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2206997&HistoricalAwards=false
关键词：
Collaborative Research Atmospheric Ridging over

项目摘要

Atmospheric ridges are elongated regions of high pressure relative to their surroundings that are typically associated with warm and dry conditions at the surface. Such atmospheric features have contributed to notable extreme events in the region, including the 2021 Northwest Heatwave, droughts, and the 2020 Labor Day Fires that burned across Oregon and Washington. While ridges are a normal part of the mid-latitude atmospheric circulation, their occurrence over western North America is influenced by multiple unique factors including proximity to the Pacific Ocean, interactions between the Pacific Ocean and the atmosphere and the complex topography of western North America. The overarching goal of this project is to advance our basic understanding of the components of the Earth system that influence atmospheric ridges over western North America, which could help identify sources for their seasonal to sub-seasonal predictions and investigate how and why ridges will respond to continued global warming. The project will target three key questions using a combination of observations and the Coupled Model Intercomparison Project (CMIP6) climate model simulations: (1) How do various atmosphere, ocean and land-surface conditions influence characteristics of atmospheric ridges such as their extent, frequency, persistence and amplitude? (2) How are simulated changes in ridge characteristics influenced by changes in these physical drivers? and (3) How do potential changes in ridge characteristics interact with warming to influence surface climate and extremes in the region? In addition, detailed analyses of the physical mechanisms associated with extreme ridges (very large, very amplified, and/or very persistent ridges) will be conducted, as they are likely associated with the most significant climate impacts. Together, the proposed work will provide an understanding of the physical mechanisms associated with weather and climate extremes that are associated with major societal impacts, in current and future warmer climates.The proposed work will advance the understanding of how and why natural climate variability and anthropogenic climate change influences this important atmospheric feature. Findings will facilitate the evaluation of implications of current and future weather and climate extremes that affect various sectors including human health, water resources, infrastructure, the regional economy, and emergency management resources. The outcomes of this work are directly translatable to impacts on society and the environment, thus aiding planning and adaptation measures. The proposed work will address gaps in scientific literature about how factors such as natural climate variability modes such as El Niño Southern Oscillation and anomalous soil-moisture conditions influence ridging in this region. The methods, framework, and insights developed from this work will be extensible to other mid-latitude regions. The project will involve training a postdoctoral researcher and a graduate student, who will be directly supported by the project, as well as undergraduate students from underrepresented backgrounds at Washington State University Vancouver (WSUV) and Portland State University (PSU). It will directly contribute to building STEM research infrastructure at WSUV, which is a primarily undergraduate institution with ~44% first-generation students, ~55% women and ~33% students of color. The investigators, postdoc, and graduate student will participate in the Oregon Museum of Science and Industry (OMSI) Science Communication Fellowship program that involves creating hands-on activities to demonstrate our research to the museum visitors and for the team's outreach efforts with local educators, schools, community groups and stakeholders. Finally, this project will provide a basic science underpinning for recent applied climate research by the PSU Climate Science Lab in partnership local water utilities.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.

高压的大气脊相对于周围的环境，与他的表面有典型的状态，在2020年的劳动节大火上燃烧了山脊，而山脊是大气循环的。对太平洋的主要因素，太平洋与AT的相互作用是AT。影响西部大气脊的脚趾组合系统可以帮助识别三个季节性到亚季节的预测的来源，并调查如何和山脊对持续的全球变暖做出响应。使用Servati的关键问题受这些物理驱动因素的变化和变暖影响表面和极端的山脊，对山脊相关的物理机制进行了详细的分析（非常大，非常放大和/或非常持久的山脊）与最重要的气候影响相关。包括人类健康，水资源，AL经济和紧急管理资源，其成果直接转化为对社会和环境的影响，有助于自然文献的辅助和适应性措施。诸如Elniño南部振荡异常的机油状况的气候变化模式在该区域的影响。该项目将直接支持该项目的学生，以及来自华盛顿州立大学Vanicouver（WSUV）UT的代表性不足的本科生将直接为WSUV Enighation Student的建设STEM研究基础设施做出贡献，约55％的女性和33％的有色学生调查人员，博士后和研究生参加俄勒冈州的科学（OMSI）科学沟通奖学金计划PSU气候科学实验室在本地奖中提供了基本的应用气候研究。