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

过去的气候仪器记录和代用记录相对 在南半球的中高纬度地区很少见。 然而，这个高度海洋性的区域是大规模气候变化的关键， 变化，以根本不同于可比的方式 北方纬度。 气候敏感，绝对过时 每年的树木年轮年表已经制定了时间跨度 从最近几个世纪到过去的一千年， 中纬度南部的森林地区：Tierra del 富埃戈、塔斯马尼亚和新西兰。 然而，这一数据尚未 在气候变化的大规模研究中得到充分利用。 之前 研究表明，利用树木年轮数据作为 过去大气-海洋相互作用的指标 地球仪。 该奖项支持利用这些南方树木- 环记录，以模拟和重建大气指数， 亚南极气候变率的海洋参数 部门 这些新数据将使我们能够评估小冰 年龄和中世纪温暖时期在这些纬度，以及如何最近， 未来可能的温室效应与过去的气候模式有关， 自然气候变化的这一部分，南部 半球

Past instrumental and proxy records of climate are relatively scarce for the middle to high latitudes of the Southern Hemisphere. Yet this highly oceanic region is a key to larger-scale climatic change, in ways that are fundamentally different from comparable northern latitudes. Climatically-sensitive, absolutely-dated annual tree-ring chronologies have been developed for time-spans ranging from recent centuries to the past millennium for the three forested land areas at southern middle latitudes: Tierra del Fuego, Tasmania and New Zealand. However this data has yet to be fully exploited in large-scale studies of climate change. Prior research has demonstrated the value of using tree-ring data as indicators of past atmosphere-ocean interaction at sites around the globe. This award supports the utilization of these southern tree- ring records to model and reconstruct indices of atmospheric and oceanic parameters of climatic variability in the subantarctic sector. These new data will allow us to evaluate the Little Ice Age and Medieval Warm Epoch at these latitudes, and how recent and possible future greenhouse warming relates to past patterns of natural climate variability for this part of the Southern Hemisphere.