Data in support of: Distance decay and directional diffusion of ecoclimate teleconnections driven by regional-scale tree die-off

Climate change is triggering regional-scale alterations in vegetation including land cover change such as forest die-off. At sufficient magnitudes, land cover change from forest die-off in one region can change not only local climate but also vegetation including agriculture elsewhere via changes in larger-scale climate patterns, termed an “ecoclimate teleconnection”. Ecoclimate teleconnections can therefore have impacts on vegetative growth in distant regions, but the degrees to which the impact decays with distance or directionally diffuses relative to the initial perturbation are general properties that have not been evaluated. We used the Community Earth system model to study this, examining the implications of tree die-off in 14 major US forested regions. For each case, we evaluated the ecological impact across North America as a function of distance and direction from the location of regional tree die-off. We found that the effects on gross primary productivity generally decayed l...气候变化正引发植被的区域尺度变化，其中包括森林死亡等土地覆盖改变。当强度足够时，某一区域因森林死亡引发的土地覆盖改变，不仅会改变局地气候，还会通过大尺度气候模式的变化，影响其他区域的植被（包括农业植被），这一现象被称为生态气候遥相关（ecoclimate teleconnection）。因此，生态气候遥相关可对遥远区域的植被生长产生影响，但相较于初始扰动，其影响随距离衰减的程度、以及沿方向扩散的特征，仍是尚未被评估的通用属性。我们借助社区地球系统模式（Community Earth system model）开展相关研究，针对美国14个主要林区的树木死亡事件进行了分析。针对每个案例，我们以区域树木死亡发生地的距离和方位为变量，评估了其在北美全域产生的生态影响。我们发现，对总初级生产力（gross primary productivity）的影响整体呈现衰减趋势……