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首页> 外文期刊>Climatic Change >Radial growth change of temperate tree species in response to altered regional climate and air quality in the period 1901-2008
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Radial growth change of temperate tree species in response to altered regional climate and air quality in the period 1901-2008

机译：1901-2008年期间温带树种的径向生长变化响应区域气候和空气质量的变化

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Both increasing and decreasing 20th century growth trends have been reported in forests throughout Europe, but only for few species and areas suitable modelling techniques have been used to distinguish individual tree growth (operating on a local scale) from growth change due to exogenous factors (operating on a broad geographical scale). This study relates for the first time observed growth changes, in terms of basal area increment (BAI) of dominant trees of pedunculate oak, common beech and Scots pine, in north-west European temperate lowland forests (Flanders) to climate, atmospheric CO2 and tropospheric O3 concentrations, N deposition, site quality and forest structure for more than a century (the period 1901-2008), applying mixed models. Growth change during the 20th century is observed for oak (increasing growth) and beech (increasing growth until the 1960s, growth decline afterwards), but not for pine. It was possible to relate growth change of oak and beech to climate time series and N deposition trends. Adding time series for CO2 and O3 concentration did not significantly improve model results. For oak and beech a switch from positive to negative growth response with increasing nitrogen deposition throughout time is observed. Growth increase for oak is mainly determined by the interaction between growing season temperature and soil water recharge. It is reasonable to assume that the observed growth trend for oak will continue for as long as early season water availability is not compromised. The decreasing trend in summer relative air humidity observed since the 1960s in the study area can be a main cause of recent beech BAI decrease. A further growth decline of beech can be expected, independent of site quality.
机译：整个欧洲的森林都报告了20世纪生长趋势的增长和下降，但是仅针对少数物种和地区，已经使用了合适的建模技术来将单个树木的生长（在本地范围内进行操作）与由于外在因素（操作性）而导致的生长变化区分开来在广泛的地理范围内）。这项研究首次观察到在西北欧洲温带低地森林（Flanders）中有花梗的橡木，山毛榉和苏格兰松的优势树的基础面积增加（BAI）与气候，大气CO <应用混合模型研究了一个多世纪以来（1901-2008年）sub> 2 和对流层O 3 的浓度，氮沉降，站点质量和森林结构。橡树（增长）和山毛榉（增长直到1960年代，之后增长下降）在20世纪观察到增长变化，而松木则没有。橡树和山毛榉的生长变化可能与气候时间序列和氮沉降趋势相关。添加CO 2 和O 3 浓度的时间序列并不能显着改善模型结果。对于橡木和山毛榉，随着时间的推移，随着氮沉降的增加，从正向生长响应转换为负向生长响应。橡木的生长增加主要取决于生长季节温度与土壤水分补给之间的相互作用。可以合理地假设，只要不损害淡季的可用水量，橡木的生长趋势将持续下去。自1960年代以来在研究区域观测到的夏季相对空气湿度下降趋势可能是最近山毛榉BAI下降的主要原因。可以预期，无论场地质量如何，山毛榉的增长都会进一步下降。

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