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)."

NCAR的Apptractresearcher旨在解决过去〜250年的年度，多年代和更长的时间尺度上的南极气候变化，以便更好地了解控制南极地区气候变化的基本物理机制。将组合和解释一系列观察，建模和代理（例如冰核）信息。努力将集中在过去约250年的南极冰核记录中对年际冰核心记录中年间到达的分析和机理解释。观察性冰核记录的分析将用于定义可变性的主要模式，并将其与现有的南极温度重建以及来自各种仪器数据集的热带气候异常相关。特别是，将使用建模实验来检查与温室气体和平流层臭氧浓度变化相关的海表温度强迫（热带与热带和热带的热带辐射强迫）对南极气候变化的变化相关的。明确纳入水同位素示踪剂方案的最新CCSM CAM（社区气候系统模型，社区大气模型）模型的增强将用于评估同位素模型的性能，并为当前的冰核心记录进行当前的解释。参与范围扩大了持续的和独立的NCAR少数族裔的教育工作（在大气中），在大气中提供了一项大气 - 在大气中 - 在大气中占有一定的机会）科学。“该奖项是根据2009年《美国复苏与再投资法》（公法111-5）资助的。”