thule_soil_moisture_2013.xls

Soil moisture from a 50+ meter transect and from 21 random points in a wet sedge meadow near Thule Air Base, Greenland. Plots consist of a collar for flux measurements 6" in diameter but moisture measurements were taken outside the plot to minimize disturbance. The transect spans a gradient from wet tundra to drier polar semi-desert.Campbell Scientific Hydrosense II with 12 cm probes. Data collected ca. every other day between DOY 168 and DOY 222. Along the transect measurements were made every five meters. Three reps per plot or position on the transect. MS Excel (.xls) with two worksheets, one for the plots, the other for the transect. Data columns in both are: day of year, plot, rep, volumetric water content (%), time period of reflectance - raw data from the instrument.

本数据集采集自格陵兰图勒空军基地附近的湿薹草甸，包含一条长度超50米的样带以及21个随机采样点的土壤湿度数据。每个采样样地均配备直径6英寸的通量测量圈，但为最大限度降低对样地的干扰，土壤湿度测量均在样地外侧进行。该样带涵盖了从湿苔原（wet tundra）到干旱程度更高的极地半荒漠（polar semi-desert）的环境梯度。测量采用坎贝尔科学（Campbell Scientific）公司生产的Hydrosense II土壤水分测定仪，搭配12厘米长度的探针。数据采集于年积日（Day of Year, DOY）168至222期间，约每隔一日开展一次。沿样带每5米设置一个采样点位，每个样地或样带点位均设置3次重复采样。数据集以MS Excel（.xls）格式存储，包含两个工作表：其一用于存储样地采样数据，其二用于存储样带采样数据。两个工作表的数据列均包含：年积日（Day of Year, DOY）、样地编号、重复次数（replicate, rep）、体积含水量（volumetric water content, %）、反射率采集时段——对应仪器采集的原始数据。