Medium Resolution Vegetation Phenology and Productivity: Seasonal amplitude (raster 500m), Oct. 2022

The seasonal amplitude, 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 seasonal amplitude is the difference between the maximum and minimum Plant Phenology Index (PPI) values reached during the season. 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 seasonal amplitude) 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 seasonal amplitude 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季节振幅作为植被物候与生产力（Vegetation Phenology and Productivity，VPP）参数之一，是哥白尼陆地监测服务（Copernicus Land Monitoring Service，CLMS）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。 季节振幅指单季内植物物候指数（Plant Phenology Index，PPI）的最大值与最小值之差。 植物物候指数（Plant Phenology Index，PPI）是一种基于物理机制的植被指数，专为优化植被生长周期监测研发。该指数的卫星重访周期为5天，其数值首先通过函数拟合推导得到植物物候季节轨迹，并基于这些轨迹计算并提供共计13项植被物候与生产力（VPP）参数，每年最多可生成两个季节的参数结果，季节振幅即为这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 季节振幅时序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，覆盖欧洲经济区38国（EEA38）及英国的对应分块，时间范围为2000年起的每年两个季节，每年第一季度完成数据更新。 该数据集的全量开放在线访问渠道将于2024年下半年上线。在此之前，用户可通过填写以下表单按需申请获取数据：https://land.copernicus.eu/contact-form