Collaborative Research: Antarctic Climate Reconstruction Utilizing the US ITASE Ice Core Array (2009- 2012)

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。该奖项支持一个重建南极洲过去物理和化学气候的项目，重点是罗斯海海湾周围地区，使用美国ITASE和澳大利亚，巴西，智利和新西兰ITASE团队在该地区收集的60个冰芯。冰芯记录每年都得到解析，而且日期非常准确，通过对稳定同位素、主要可溶离子和某些微量元素的分析，将提供过去温度、降水、大气环流、大气化学、海冰范围和火山活动的仪器校准代用指标。这些记录将被用来了解太阳，火山和人类对南极气候的作用，并在更广泛的南半球和全球气候变率的背景下调查南极洲最近突然气候变化的特征。该项目的智力价值在于，国际地球同步空间数据收集系统产生了一系列冰芯记录，将南极近期气候变化观测的空间分辨率提高了一个数量级以上，为评估过去和当前的变化提供了基础，并为监测南半球未来的气候变化建立了框架。这是在一个关键时刻，因为全球创纪录的变暖和其他影响，注意到在南大洋，南极半岛，南极冰盖。该项目更广泛的影响是，参与该项目的博士后和研究生将受益于气候变化研究的观测和建模方法，以及将在两个合作机构和其他著名的气候变化机构举行的工作会议。公众和媒体对研究结果非常感兴趣，这两个合作机构的网站载有气候变化立场文件、关于当前气候变化问题的科学交流以及科学贡献系列。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This award supports a project to reconstruct the past physical and chemical climate of Antarctica, with an emphasis on the region surrounding the Ross Sea Embayment, using 60 ice cores collected in this region by US ITASE and by Australian, Brazilian, Chilean, and New Zealand ITASE teams. The ice core records are annually resolved and exceptionally well dated, and will provide, through the analyses of stable isotopes, major soluble ions and for some trace elements, instrumentally calibrated proxies for past temperature, precipitation, atmospheric circulation, chemistry of the atmosphere, sea ice extent, and volcanic activity. These records will be used to understand the role of solar, volcanic, and human forcing on Antarctic climate and to investigate the character of recent abrupt climate change over Antarctica in the context of broader Southern Hemisphere and global climate variability. The intellectual merit of the project is that ITASE has resulted in an array of ice core records, increasing the spatial resolution of observations of recent Antarctic climate variability by more than an order of magnitude and provides the basis for assessment of past and current change and establishes a framework for monitoring of future climate change in the Southern Hemisphere. This comes at a critical time as global record warming and other impacts are noted in the Southern Ocean, the Antarctic Peninsula, and on the Antarctic ice sheet. The broader impacts of the project are that Post-doctoral and graduate students involved in the project will benefit from exposure to observational and modeling approaches to climate change research and working meetings to be held at the two collaborating institutions plus other prominent climate change institutions. The results are of prime interest to the public and the media Websites hosted by the two collaborating institutions contain climate change position papers, scientific exchanges concerning current climate change issues, and scientific contribution series.