Tree-ring based high-resolution temporal climate and environmental change in Corsica in the Late Holocene

对科西嘉岛存活的黑松树进行树气候学和树化学研究，将揭示该树种对气候变化的生态响应和林线上的气候分化。这项研究将基于空间密集抽样网络的年轮宽度和晚材密度测量。到目前为止，采样的最古老的活树显示了多达850个年轮，是西地中海地区最古老的树之一。由于沿气候梯度的排列，所选地点对近期冷湿暖干条件表现出不同的气候敏感性，因此可以代表不同气候变量的区域气候趋势。将在时间序列超过520年的地点以年度分辨率测量木材纤维素中稳定的氧和碳同位素变异性，时间序列跨越小冰期的主要部分。对管胞特性变化的图像分析将提供关于年内尺度上控制生长的气候变化的信息，并将补充对密度测量的解释。由树木材料获得的空间数据应与其他气候指标进行比较，如山地植被分布、潜在树线位置、临时雪线(遥感数据)，并将根据地表水现代同位素组成和最大雪线凹陷数据进行校准。科西嘉岛位于地中海气旋路径的气候关键位置。这项研究致力于晚全新世山脉气候变化，并将提供地中海地区的新数据，该地区将在未来几十年受到气候变暖和干旱的强烈影响。

A dendroclimatological and dendrochemical study on living Pinus nigra laricio trees in Corsica shall reveal the specie’s ecological response to climate change and climate differentiation at the timberline at annual resolution. The study will be based on ring width and latewood density measurements of a spatially dense sampling network. The oldest living trees sampled so far show up to 850 tree rings and are among the oldest in the western Mediterranean region. Due to the alignment along climatic gradients, the selected sites show different climatic sensitivity to cold, wet, warm and dry recent conditions and can thus represent regional climatic trends of different climatic variables. Stable oxygen and carbon isotope variability in wood cellulose will be measured at annual resolution at sites with time series of more than 520 years, spanning the major part of the Little Ice Age. Image analysis of variations of the tracheid properties will provide information about growth-controlling climate variations at an intra-annual scale and will supplement the interpretation of the density measurements. The spatial data achieved by tree material shall be compared with other climate proxies such as montane vegetation distribution, potential treeline position, temporary snowline (remote sensing data), and will be calibrated against data of modern isotopic composition of surface waters and maximum snowline depression. Corsica is located in a climatic key position in the track of Mediterranean cyclones. The study is dedicated to late Holocene mountain climatic change and will contribute new data of the Mediterranean area, which will be strongly affected by warming and drying in the next decades.