Rapid warming and increasing disturbances in high-latitude regions have caused extensive vegetation shifts and uncertainty in future carbon budgets. Better predictions of vegetation dynamics and functions require characterizing resilience, which indicates the capability of an ecosystem to recover from perturbations. Here, using temporal autocorrelation of remotely sensed greenness, we quantify time-varying vegetation resilience during 2000–2019 across northwestern North American Arctic-boreal ecosystems. We find that vegetation resilience significantly decreased in southern boreal forests, including forests showing greening trends, while it increased in most of the Arctic tundra. Warm and dry areas with high elevation and dense vegetation cover were among the hotspots of reduced resilience. Resilience further declined both before and after forest losses and fires, especially in southern boreal forests. These findings indicate that warming and disturbance have been altering vegetation resilience, potentially undermining the expected long-term increase of high-latitude carbon uptake under future climate.

高纬度地区的快速变暖和不断增加的干扰导致了广泛的植被变化和未来碳收支的不确定性。更好地预测植被动态和功能需要表征弹性，这表明生态系统从扰动中恢复的能力。在这里，使用遥感绿色的时间自相关，我们量化了 2000-2019 年北美西北部北极-北方生态系统的时变植被恢复力。我们发现，南部北方森林的植被恢复力显着降低，包括表现出绿化趋势的森林，而在北极苔原的大部分地区则有所增加。高海拔和茂密植被覆盖的温暖干燥地区是恢复力降低的热点地区之一。森林损失和火灾前后的恢复力进一步下降，尤其是在南部北方森林。这些发现表明，变暖和干扰一直在改变植被的恢复力，可能破坏未来气候下高纬度碳吸收的预期长期增长。