Hydro-climatic resilience is an essential element of food security. The miombo ecosystem in Southern Africa supports varied land uses for a growing population. Albedo, Leaf Area Index (LAI), Fractional Vegetation Cover (FVC), Solar-Induced chlorophyll Fluorescence (SIF), and precipitation remote-sensing data for current climate were jointly analyzed to explore vegetation dynamics and water availability feedbacks. Changes in the surface energy balance tied to vegetation status were examined in the light of an hourly albedo product with improved atmospheric correction derived for this study. Phase-space analysis shows that the albedo’s seasonality tracks the landscape-scale functional stability of miombo and woody savanna with respect to precipitation variations. Miombo exhibits the best adaptive traits to water stress which highlights synergies among root-system water uptake capacity, vegetation architecture, and landscape hydro-geomorphology. This explains why efforts to conserve the spatial structure of the miombo forest in sustainable farming of seasonal wetlands have led to significant crop yield increases. Grass savanna’s high vulnerability to water stress is illustrative of potential run-away impacts of miombo deforestation. This study suggests that phase-space analysis of albedo, SIF, and FVC can be used as operational diagnostics of ecosystem health.

中文翻译：

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南部非洲长期农业的前景：遥感观测中萨凡纳生态系统的新兴动态

水文气候适应力是粮食安全的基本要素。南部非洲的 miombo 生态系统支持不断增长的人口的各种土地用途。联合分析了反照率、叶面积指数 (LAI)、植被覆盖率 (FVC)、太阳诱导叶绿素荧光 (SIF) 和当前气候的降水遥感数据，以探索植被动态和可用水量反馈。与植被状况相关的表面能量平衡的变化根据每小时反照率产品进行了检查，并为这项研究得出了改进的大气校正。相空间分析表明，反照率的季节性跟踪 miombo 和木质稀树草原在降水变化方面的景观尺度功能稳定性。Miombo 表现出对水分胁迫的最佳适应性特征，突出了根系吸水能力、植被结构和景观水文地貌之间的协同作用。这解释了为什么在季节性湿地的可持续农业中保护 miombo 森林空间结构的努力导致作物产量显着增加。草稀树草原对水资源压力的高度脆弱性说明了 miombo 森林砍伐的潜在失控影响。这项研究表明，反照率、SIF 和 FVC 的相空间分析可用作生态系统健康的操作诊断。这解释了为什么在季节性湿地的可持续农业中保护 miombo 森林空间结构的努力导致作物产量显着增加。草稀树草原对水资源压力的高度脆弱性说明了 miombo 森林砍伐的潜在失控影响。这项研究表明，反照率、SIF 和 FVC 的相空间分析可用作生态系统健康的操作诊断。这解释了为什么在季节性湿地的可持续农业中保护 miombo 森林空间结构的努力导致作物产量显着增加。草稀树草原对水资源压力的高度脆弱性说明了 miombo 森林砍伐的潜在失控影响。这项研究表明，反照率、SIF 和 FVC 的相空间分析可用作生态系统健康的操作诊断。