Green Chlorophyll Vegetation Index (GCI) - Switzerland [2020-2021, Landsat]

This dataset is an time-serie of Landsat Analysis Ready Data (ARD)- derived Green Chlorophyll Vegetation Index (GCI) computed from Landsat 5-7-8 data. GCI is used to estimate the content of leaf chlorophyll in various species of plants using the forumla GCI=(NIR/Green) – 1. See Gitelson et al. (2003) DOI: 10.1029/2002gl016450 The chlorophyll content reflects the physiological state of vegetation; it decreases in stressed plants and can therefore be used as a measurement of vegetation health. GCI values ranges from -1 to +1. Values are provided as integer and multiplied by 1000 Metrics: annual (_annual) and seasonal (_spring; _summer; _autumn; _winter) mean (_nanmean), standard dev (_nanstd), min (_nanmin), max (_nanmax), median (_nanmedian), and amplitude (_range) Data format: GeoTiff This dataset has been genereated with the Swiss Data Cube (http://www.swissdatacube.ch) in the frame of the ValPar.CH project本数据集为基于Landsat 5、7、8号卫星数据计算得到的Landsat分析就绪数据（Analysis Ready Data，ARD）衍生绿色叶绿素植被指数（Green Chlorophyll Vegetation Index，GCI）时间序列。GCI的计算公式为GCI=(NIR/Green) – 1，该指数可用于估算多种植物的叶片叶绿素含量，相关方法参见Gitelson等人（2003）的研究，DOI: 10.1029/2002gl016450。叶绿素含量能够反映植被的生理状态，受胁迫的植物叶片叶绿素含量会下降，因此GCI可作为衡量植被健康状况的有效指标。GCI的取值范围为-1至+1，数据以整数形式存储并经过1000倍缩放。本数据集包含的统计指标包括：年际（数据文件后缀为_annual）与季节（数据文件后缀分别为_spring、_summer、_autumn、_winter）的均值（统计标识为_nanmean）、标准差（统计标识为_nanstd）、最小值（统计标识为_nanmin）、最大值（统计标识为_nanmax）、中位数（统计标识为_nanmedian）以及变化幅度（统计标识为_range）。数据格式为GeoTiff。本数据集是在ValPar.CH项目框架下，依托瑞士数据立方（Swiss Data Cube，http://www.swissdatacube.ch）生成的。