Abstract Vegetation phenology is an integrated indicator of vegetation growth and development in response to climate, and it is one of the important variables regulating carbon flux in forest ecosystems. Land surface phenology derived from different remote sensing products and their relationships with flux tower gross primary production (GPP) data have been paid much attention. Remotely sensed phenology was retrieved based on greenness, while GPP-based phenology was extracted based on photosynthesis. However, exploring the differences between remotely sensed and GPP-based phenology are limited. In this study, we compared phenological metrics obtained from flux tower GPP of a mixed plantation with phenological metrics derived using MODIS EVI and MCD12Q2 from 2006 to 2017. We also explored phenological transitions and the response of phenology to climatic variables. The results showed that the 16-day composited EVI time series was in agreement with the 16-day composited GPP time series (R2 = 0.86, p

中文翻译：

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暖温带混交林物候动态及其对气候变量的响应

摘要 植被物候是植被生长发育响应气候的综合指标，是调节森林生态系统碳通量的重要变量之一。来自不同遥感产品的地表物候及其与通量塔初级生产总值 (GPP) 数据的关系受到了广泛关注。基于绿色度检索遥感物候，而基于光合作用提取基于 GPP 的物候。然而，探索遥感和基于 GPP 的物候学之间的差异是有限的。在这项研究中，我们将 2006 年至 2017 年从混合种植园通量塔 GPP 获得的物候指标与使用 MODIS EVI 和 MCD12Q2 得出的物候指标进行了比较。我们还探讨了物候转变和物候对气候变量的反应。结果表明，16天复合EVI时间序列与16天复合GPP时间序列一致（R2=0.86，p