Applying Ice Cores, Instrumental Climate Records and Climate Modeling Towards a Mechanistic Understanding of Antarctic Climate Variability on Interannual to Multidecadal Time Scale

应用冰芯、仪器气候记录和气候模型对南极气候年际至数十年时间尺度变化的机制进行理解

• 批准号: 0838871
• 负责人: Clara Deser
• 金额: $ 49.55万
• 依托单位: University Corporation For Atmospheric Res
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-01 至 2012-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838871&HistoricalAwards=false
• 关键词: Applying; Ice; Cores; Instrumental; Climate

AbstractResearchers at NCAR aim to address Antarctic climate variability on interannual, multidecadal and longer timescales over the past ~250 years as a means to better understand the underlying physical mechanisms controlling climate change in the southern polar region. A range of observational, modeling and proxy (e.g. ice core) information will be combined and interpreted. Effort will be focused on the analysis and mechanistic interpretation of the interannual-to-multidecadal variability in the Antarctic ice core records over the past ~250 years. Analyses of observational ice core records will be used to define the leading patterns of variability and relate those to existing Antarctic temperature reconstructions and to tropical climate anomalies from various instrumental data sets. In particular, modeling experiments will be used to examine the relative roles of sea surface temperature forcing (tropical vs. extra-tropical) and direct atmospheric radiative forcing associated with changes in greenhouse gas and stratospheric ozone concentrations on Antarctic climate variability.The modeling component will use existing and modified atmospheric general circulation simulations driven with observational history from 1870 to the present. An augmentation of the most recent CCSM CAM (Community Climate System Model, Community Atmospheric Model) model explicitly incorporating a water isotope tracer scheme will be used to evaluate the isotope model performance, and to broaden current interpretation of ice core records.Participation in an ongoing and independently funded NCAR minority serving education effort (SOARS - Significant Opportunities in Atmospheric Research) is offered as a means of broadening participation in the atmospheric and related sciences."This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."

摘要NCAR的研究人员旨在解决南极气候变化的年际，多年和更长的时间尺度在过去的250年，作为一种手段，以更好地了解控制气候变化的基本物理机制在南极地区。将综合和解释一系列观测、建模和代用资料（如冰芯）。工作重点将是分析和机制解释的年际至多年的变化，在南极冰芯记录在过去的250年。对观测冰芯记录的分析将用于确定主要的变率模式，并将其与现有的南极温度重建和各种仪器数据集的热带气候异常联系起来。特别是，将利用模拟实验来研究海洋表面温度强迫（热带与热带外）和与温室气体和平流层臭氧浓度变化有关的直接大气辐射强迫对南极气候变异性的相对作用，模拟部分将利用现有的和经过修改的大气环流模拟，这些模拟是根据1870年至今的观测历史进行的。最新CCSM CAM的增强（社区气候系统模型，社区大气模型）模型明确纳入了水同位素示踪剂计划将用于评估同位素模型的性能，并扩大目前对冰芯记录的解释。参与正在进行的独立资助的NCAR少数民族服务教育工作（SOARS -大气研究的重要机会）是作为扩大参与大气和相关科学的一种手段提供的。“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。"