Medium Resolution Vegetation Phenology and Productivity: Rate of increase at the start of the season (raster 500m), Oct. 2022

The increase rate, one of the Vegetation Phenology and Productivity (VPP) parameters, is a product of the pan-European Medium Resolution Vegetation Phenology and Productivity (MR-VPP) component of the Copernicus Land Monitoring Service (CLMS). The increase rate at the end of the season (decrease rate) expresses the rate of change in the values of the Plant Phenology Index (PPI) at the day when the vegetation growing season starts. It is calculated as the ratio of the difference between the left 20 % and 80 % levels and the corresponding time difference. The Plant Phenology Index (PPI) is a physically based vegetation index, developed for improving the monitoring of the vegetation growth cycle. The PPI index values, with 5-day satellite revisit cycle, are first used in a function fitting to derive the PPI Seasonal Trajectories. From these Seasonal Trajectories, a suite of 13 Vegetation Phenology and Productivity (VPP) parameters are then computed and provided, for up to two seasons each year. The increase rate is one of the 13 parameters. The full list is available in the Product User Manual: https://land.copernicus.eu/user-corner/technical-library/clms_mrvpp_pum_d1-0.pdf The increase rate time series dataset is made available as raster files with 500x 500m resolution, in ETRS89-LAEA projection corresponding to the MCD43 tiling grid, for those tiles that cover the EEA38 countries and the United Kingdom and for two seasons in each year from 2000 onwards. It is updated in the first quarter of each year. The full on-line access to open and free data for this resource will be made available in the second half of 2024. Until then the data will be made available 'on-demand' by filling in the form at: https://land.copernicus.eu/contact-form植被物候与生产力（Vegetation Phenology and Productivity，VPP）参数之一的增长速率，是哥白尼陆地监测服务（Copernicus Land Monitoring Service，CLMS）旗下泛欧洲中分辨率植被物候与生产力（Medium Resolution Vegetation Phenology and Productivity，MR-VPP）组分的产品。 季末增长速率（即衰减速率）表征植被生长季起始当日的植物物候指数（Plant Phenology Index，PPI）数值变化率，其计算方式为左侧20%与80%水平的差值除以对应的时间差。 植物物候指数（PPI）是一种基于物理原理的植被指数，专为优化植被生长周期监测而开发。该指数采用5天的卫星重访周期获取数据，首先通过函数拟合推导得到PPI季节轨迹。基于这些季节轨迹，可计算并提供共计13项VPP参数，每年最多可生成两个季节的数据集，增长速率即为这13项参数之一。完整参数列表可参阅《产品用户手册》：https://land.copernicus.eu/user-corner/technical-library/clms_mrvpp_pum_d1-0.pdf 本增长速率时间序列数据集以栅格文件形式发布，分辨率为500×500米，采用匹配MCD43分块网格的ETRS89-LAEA投影坐标系，覆盖EEA38成员国与英国的对应分块，时间范围为2000年起的每年两个季节，于每年第一季度完成更新。 本资源的全量开放免费数据在线访问渠道将于2024年下半年上线。在此之前，数据将通过填写以下表单按需提供：https://land.copernicus.eu/contact-form