AGS-PRF Impacts of Large-Scale Dynamics on Regional Climate Sensitivity: Model-Paleodata Comparisons in Three Mid-Latitude Regions

大尺度动力学对区域气候敏感性的 AGS-PRF 影响：三个中纬度地区的模型古数据比较

• 批准号: 1524866
• 负责人: Juan Lora
• 金额: $ 17.2万
• 依托单位: Lora Juan M
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2017-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1524866&HistoricalAwards=false
• 关键词: AGS; PRF; Impacts; Large; Scale

This AGS PostDoctoral Research Fellow (PRF) award supports the comparison of simulations of last glacial maximum (LGM) and present-day climates from general circulation models to paleoclimatic proxy data to investigate dynamical mechanisms that affect regional climates. This analysis will help to determine the dominant large-scale mechanisms affecting the regional climates at LGM of three mid-latitude regions, as well as clarify the ability of regional paleodata to elucidate large-scale paleoclimatic phenomena. Climate models that are used to predict future climate changes will be benchmarked against paleodata that serve as proxies for past climate parameters thereby testing the ability of these models to correctly simulate past climate states and helping to ensure that dynamical processes involved in generating regional responses are well represented and properly simulated. This, in turn, will help assess the regional capabilities of models under climates different than the current, informing future improvements and development of these models.Of principal interest is the influence of planetary-scale dynamics on regional-scale changes in temperature and the hydrological cycle. The Fellow will examine the effects of such phenomena as mid-latitudinal stationary waves and monsoon dynamics on atmospheric and surface temperatures and precipitation in three regions including the Chinese Loess Plateau, the southwestern United States, and the midwestern United States with the aim of quantifying the regional sensitivities in the models. Output from Paleoclimate Modelling Intercomparison Project (PMIP) simulation model runs will be compared to published datasets that serve as proxies for temperatures and the hydrological cycle in these three regions. The Fellow will further investigate identified dynamical mechanisms, including their sensitivities to boundary and forcing uncertainties by use of the Laboratoire de Météorologie Dynamique (LMDZ) model. This project helps to improve understanding surrounding regional response to climate variability across temporal scales and significant outreach activities. Outreach activities to be conducted at Markham Middle School, whose students are predominantly Hispanic and Afro-Caribbean, are intended for improving science communication and education to minorities. Also, one of the undergraduates who will work with the Fellow over the next year is also from an underrepresented minority in the sciences. As an additional broadening participation exercise, the Fellow will give a science talk about the proposed research at the UCLA chapter of the Society for the Advancement of Chicanos and Native Americans in Science (SACNAS), and will furthermore recruit an undergraduate student from the SACNAS chapter to be involved in the research and outreach activities during the second year of the fellowship.

该 AGS 博士后研究员 (PRF) 奖项支持将末次盛冰期 (LGM) 和当今气候的模拟与古气候代理数据进行比较，以研究影响区域气候的动力机制。影响三个中纬度地区末次盛冰期区域气候主导因素的大尺度机制，并阐明区域古数据阐明用于解释大尺度古气候现象的能力。预测未来的气候变化将以作为过去气候参数代理的古数据为基准，从而测试这些模型正确模拟过去气候状态的能力，并有助于确保产生区域响应的动力过程得到良好的体现和正确的模拟。反过来，将有助于评估模型在与当前气候不同的情况下的区域能力，为这些模型的未来改进和发展提供信息。主要关注的是行星尺度动力学对区域尺度温度和水文循环变化的影响.研究员将检查效果研究了中纬度驻波和季风动力学等现象对中国黄土高原、美国西南部和美国中西部三个地区大气、地表温度和降水的影响，旨在量化模型中的区域敏感性。古气候建模比对项目 (PMIP) 模拟模型运行的输出将与作为这三个地区温度和水文循环代理的已发布数据集进行比较。利用气象动态实验室 (LMDZ) 模型研究已确定的动力机制，包括其对边界和强制不确定性的敏感性。该项目有助于提高对跨时间尺度气候变化的区域响应的了解以及即将开展的重大外展活动。在马克姆中学进行的这项研究的目的是改善少数族裔的科学传播和教育，该中学的学生主要是西班牙裔和非洲裔加勒比人。作为一项额外的扩大参与范围的活动，该研究员将在奇卡诺人和美洲原住民科学促进会 (SACNAS) 的加州大学洛杉矶分校分会上就拟议的研究进行科学演讲，并将进一步从 SACNAS 分会招募一名本科生，参与奖学金第二年的研究和外展活动。