M4_30min

\"M4 is located on a well drained Cassiope heath, about 150 meters north of the 'Climate station' (operated by ClimateBasis).
In 2009 NDVI sensors were installed and data recorded every 30 min. In 2014 temperature probes were installed in different depths in the soil. This data is also recorded every 30 min. Thus, the 30 min file contains data from 2009 to present.
Data was recorded in a CR10x Campbel scientifix data logger until June 2014, where the data logger was changed to a CR1000.

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M4站点坐落于排水良好的帚石楠（Cassiope）灌丛生境中，距由ClimateBasis运营的“气候站”北侧约150米。2009年，该站点部署了归一化差分植被指数（NDVI）传感器，以30分钟为间隔采集并存储观测数据。2014年，研究人员又在土壤不同深度布设了温度探头，该类数据同样以30分钟为周期进行记录。因此，该30分钟粒度数据集涵盖了2009年至今的全部观测资料。2014年6月之前，所有数据均通过CR10X型坎贝尔科学（Campbell Scientific）数据记录仪存储，之后该设备被更换为CR1000型数据记录仪。