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首页> 外文期刊>Agricultural and Forest Meteorology >Response of radial increment variation of Scots pine to temperature, precipitation and soil water content along a latitudinal gradient across Finland and Estonia
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Response of radial increment variation of Scots pine to temperature, precipitation and soil water content along a latitudinal gradient across Finland and Estonia

机译：横跨芬兰和爱沙尼亚的苏格兰松的径向增量变化对温度，降水和土壤水分的影响

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In the Nordic countries, temperature and precipitation regimes are predicted to change as a result of climate change, which may reduce water availability and thus tree growth. This study presents a spatial approach for analysing variations in the annual radial increments of trees across a latitudinal transect. The aim was to evaluate the importance of daily temperature, precipitation and soil water content as regulators of tree growth across a north-south gradient. Increment cores were collected from living Scots pine (Pinus sylvestris L) trees growing on dry and sandy soils in five regions in Finland and two regions in Estonia. A total of 1 024 trees were measured across 551 sample plots. No clear latitudinal trend was evident in the magnitude of the correlation between the variations in annual increment and the current summer's temperature, but the time period most strongly related to the increment variation shifted towards earlier dates with a decrease in latitude southwards. Thus, the results challenge the traditional findings that the growth of trees located at lower latitudes is less affected by temperature. Moreover, the results demonstrate the importance of using high-resolution weather data when analysing variations in the radial increments of trees. In all of the regions, including the high northern latitudes, high precipitation in the current summer promotes tree growth, and the correlation between summer precipitation and the increment variation increases with a decrease in latitude. The correlations between increment variation and soil water content estimated using two different models were lower than those involving precipitation. The results suggest that accurate soil information is needed to describe the connection between water content and tree growth
机译：在北欧国家，由于气候变化，温度和降水制度预计会发生变化，这可能会减少水的可利用性，从而减少树木的生长。这项研究提出了一种空间方法，用于分析整个横向样带上树木年径向增量的变化。目的是评估日温度，降水量和土壤含水量在整个南北梯度上作为树木生长调节剂的重要性。增量核心是从生长在芬兰五个地区和爱沙尼亚两个地区的干燥和沙质土壤上的苏格兰樟子松（Pinus sylvestris L）树收集的。在551个样地中总共测量了1,024棵树。年增量变化与当前夏季气温之间的相关程度没有明显的纬度趋势，但与增量变化最密切相关的时间段向南移，而向较早的日期偏移。因此，结果挑战了传统的发现，即位于较低纬度的树木的生长受温度影响较小。此外，结果证明了在分析树木的径向增量变化时使用高分辨率天气数据的重要性。在所有地区，包括北部高纬度地区，当前夏季的高降水量促进了树木的生长，并且夏季降水量与增量变化之间的相关性随着纬度的减小而增加。使用两种不同模型估算的增量变化与土壤含水量之间的相关性低于涉及降水的相关性。结果表明，需要准确的土壤信息来描述水分与树木生长之间的联系

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