CO2 and Delta 13CO2 in Antarctic Ice Cores

南极冰芯中的 CO2 和 Delta 13CO2

• 批准号: 9980691
• 负责人: Martin Wahlen
• 金额: $ 41.24万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9980691&HistoricalAwards=false
• 关键词: CO2; Delta; 13CO2; Antarctic; Ice

9980691WahlenThis award is for support for three years of funding to reconstruct the atmospheric carbon dioxide (CO2) and carbon-13 isotope (d13C) concentration in ice cores from Antarctica over several climatic periods. Samples from the Holocene, the Last Glacial Maximum (LGM)-Holocene transition and glacial stadial/interstadial episodes will be examined. Samples from the Siple Dome ice core drilled in 1998/99 will be made, in addition to measurements from the Taylor Dome and Vostok ice cores. The major objectives are to investigate the phase relationships between variations in the concentration of atmospheric CO2, its carbon isotope composition, and temperature changes (indicated by 18dO and dD of the ice) during deglaciations as well as across rapid climate change events (e.g. Dansgaard-Oeschger events). This will help to determine systematic changes in the global carbon cycle during and between different climatic periods, and to ascertain if the widely spread northern hemisphere temperature stadial/interstadial events produced a global atmospheric carbon dioxide signal. Proven experimental techniques will be used.

9980691 Wahlen该奖项旨在资助三年来重建南极洲冰芯在几个气候时期的大气二氧化碳（CO2）和碳13同位素（d13 C）浓度。 将对来自全新世、末次盛冰期（LGM）-全新世过渡期和冰期/冰期间的样品进行检查。 除了从泰勒冰穹和沃斯托克冰芯进行测量外，还将从1998/1999年钻取的西普尔冰穹冰芯中取样。 主要目的是调查大气CO2浓度变化之间的相位关系，其碳同位素组成，和温度变化（由冰的18 dO和dD表示）在冰消期以及整个快速气候变化事件（如Dansgaard-Oeschger事件）。 这将有助于确定在不同气候时期内和不同气候时期之间全球碳循环的系统变化，并确定广泛分布的北方半球温度场/场间事件是否产生了全球大气二氧化碳信号。 将采用实验技术。