WATER: Dataset of automatic meteorological observations at the Dayekou Maliantan grassland station in the Dayekou watershed from Nov to Dec, 2007

The dataset of automatic meteorological observations was obtained at the Dayekou Maliantan grassland station (E100°18′/N38°33′, 2817m) from Nov. 2, 2007 to Dec. 31, 2009. The experimental area with a flat and open terrain was slightly sloping from southeast to northwest. The landscape was mainly grassland, with vegetation 0.2-0.5m high. Observation items were multilayer gradient (2m and 10m) of the wind speed, the air temperature and air humidity, the air pressure, precipitation, four components of radiation, the multilayer soil temperature (5cm, 10cm, 20cm, 40cm, 80cm, and 120cm), soil moisture (5cm, 10cm, 20cm, 40cm, 80cm, and 120cm), and soil heat flux (5cm & 15cm). The raw data were level0 and the data after basic processes were level1, in which ambiguous ones were marked; the data after strict quality control were defined as Level2. The data files were named as follows: station+datalevel+AMS+datadate. Level2 or above were strongly recommended to domestic users. As for detailed information, please refer to Meteorological and Hydrological Flux Data Guide.

本数据集源于大叶阔马尔彦他草原气象观测站（地理坐标：东经100°18′，北纬38°33′，海拔2817米），收录了自2007年11月2日至2009年12月31日间的自动气象观测数据。观测区域地形平坦开阔，略呈东南至西北向倾斜。该区域主要为草原景观，植被高度介于0.2至0.5米之间。观测项目包括风速的分层梯度（2米和10米）、气温与空气湿度、气压、降水量、辐射四要素、分层土壤温度（5cm、10cm、20cm、40cm、80cm和120cm）、土壤水分（5cm、10cm、20cm、40cm、80cm和120cm）以及土壤热通量（5cm与15cm）。原始数据为0级，经过基本处理后的数据为1级，其中模糊不清的数据予以标注；经过严格质量控制的数据被定义为2级。数据文件命名格式为：station+datalevel+AMS+datadate。强烈建议国内用户使用2级或以上数据。如需详细信息，请参阅气象水文通量数据指南。