Collaborative Research: P2C2--High-Resolution Reconstruction of Last Millennium North American Arctic Temperatures Using Quantitative Wood Anatomy

该研究小组的目标是利用定量木材解剖学来开发北美北极林线过去温度的长期高分辨率代理记录，并将其应用于过去千年的环境重建。 从定量木材解剖学中获得的高精度年内信息可以帮助研究人员专门针对代理气候敏感性的季节窗口，以更好地解决年际气候变化和近期趋势，并准确确定极端事件的时间，包括火山爆发后的降温。 从这些记录中获得的一系列季节性信息将在数据同化框架内使用，以对北美高纬度地区过去一千年的温度和相关大气环流场进行增强的气候场重建。潜在的更广泛影响包括促进女性树木气候学博士生的职业生涯、让 STEM K-12 教师参与实地工作、与研究区域的土著社区进行深思熟虑的接触，以及改进亚利桑那州树环实验室的外展材料。该奖项反映了 NSF 的法定使命和通过使用基金会的智力价值和更广泛的影响审查标准进行评估，该项目被认为值得支持。

The research team aims to use quantitative wood anatomy to develop long high-resolution proxy records of past temperature from the Arctic North American tree-line and apply these to environmental reconstructions over the last millennium. The resulting high precision intra-annual information available from quantitative wood anatomy may aid researchers to specifically target seasonal windows of proxy climate sensitivity to better resolve both interannual climate variability and recent trends and precisely identify the timing of extreme events, including the cooling following volcanic eruptions. The array of seasonal information available from these records will be used within a data assimilation framework to produce enhanced climate field reconstructions of temperatures and associated atmospheric circulation fields over the last millennium for high latitude North America.The potential Broader Impacts include promoting the career of a female dendroclimatology doctoral student, engaging STEM K-12 teachers in fieldwork, thoughtful engagement with indigenous communities in the study region, and improved outreach materials at the Tree Ring lab in AZ.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.