Tree-Ring Data from Subantarctic Forest: Indices of Southern Hemisphere Atmosphere-Ocean Climate Variability

这项提议的研究涉及从数据稀少的亚南极地区（包括塔斯马尼亚、新西兰和南美洲南部）生成高分辨率、精确年代的树木年轮年表。这些记录对于建立一个南半球古气候数据网络至关重要，可以与北半球已经存在的数据网络相媲美。支持者正在利用亚南极年表模拟和重建南半球温带纬度的温度和大气-海洋环流指数。具体目标包括：(1)制定更多的环宽和最大晚木密度年表，以改进我们现有的亚南极森林站点网络；(2)利用活的和亚化石的木材材料，将选定的年轮记录和重建扩展到更早的时间；(3)继续模拟和重建亚南极纬度的温度、降水和环流指数；(4)从几个额外的树种中得出年表。

This proposed research involves the generation of high-resolution, precisely-dated tree-ring chronologies from data-sparse subantarctic regions, including Tasmania, New Zealand and southern South America. Such records are essential for developing a network of Southern Hemisphere paleoclimatic data comparable to that which already exists for the Northern Hemisphere. The proponents are utilizing the subantarctic chronologies in modeling and reconstruction of indices of temperature and atmosphere-ocean circulation for the Southern Hemisphere extratropical latitudes. Specific objectives include: (1) to develop additional ring-width and maximum latewood density chronologies to improve our existing network for subantarctic forest sites; (2) to extend selected tree-ring records and reconstructions further back in time using living and subfossil wood material; (3) to continue to model and reconstruct temperature, precipitation and circulation indices for subantarctic latitudes; and (4) to produce chronologies from several additional tree species.