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，使用由美国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。冰芯记录每年都要进行解析，而且年代非常准确，通过对稳定同位素、主要可溶性离子和一些微量元素的分析，将提供仪器校准的过去温度、降水、大气环流、大气化学、海冰范围和火山活动的代用物。这些记录将用于了解太阳、火山和人类活动对南极气候的作用，并在更广泛的南半球和全球气候变率的背景下研究南极最近气候突变的特征。该项目的知识价值在于，ITASE产生了一系列冰芯记录，将最近南极气候变率观测的空间分辨率提高了一个数量级以上，并为评估过去和当前的变化提供了基础，并建立了监测南半球未来气候变化的框架。这是在全球创纪录的变暖和其他影响在南大洋、南极半岛和南极冰盖上被注意到的关键时刻。该项目的更广泛影响是，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，并将在两个合作机构和其他著名气候变化机构举行工作会议。公众对研究结果非常感兴趣，两个合作机构主办的媒体网站包含气候变化立场文件、有关当前气候变化问题的科学交流以及科学贡献系列。

Mayewski/0837883 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.