WATER: Dataset of automatic meteorological observations at the Dadongshu mountain pass snow observation station (2007-2009)

The dataset of automatic meteorological observations was obtained at the Dadongshu mountain snow observation station (E100°14′/N38°01′, 4101m) from Oct. 29, 2007 to Oct. 1, 2009. The experimental area with a flat and open terrain was slightly sloping from southeast to northwest. With alpine meadow and stones, and snow in autumn, winter and spring, the landscape was ideal. Observation items were multilayer (2m and 10m) of the wind speed, the air temperature and air humidity, the air pressure, rain and snow gauges, snow depth, 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.

该自动气象观测数据集源于大东树山气象观测站（E100°14′/N38°01′，海拔4101米），数据采集时间跨度自2007年10月29日至2009年10月1日。实验区域地形平坦开阔，略呈东南至西北走向的倾斜。该地区秋季、冬季及春季覆盖有高山草甸和岩石，以及积雪，景观条件优越。观测项目包括风速的多层（2米和10米）测量、气温和空气湿度、气压、雨量计和雪量计、积雪深度、辐射四分量、多层土壤温度（5厘米、10厘米、20厘米、40厘米、80厘米和120厘米）、土壤水分（5厘米、10厘米、20厘米、40厘米、80厘米和120厘米）以及土壤热通量（5厘米和15厘米）。原始数据为0级数据，经过基本处理后的数据为1级数据，其中模糊数据被标记；经过严格质量控制后的数据被定义为2级数据。数据文件命名规则为：station+datalevel+AMS+datadate。强烈建议国内用户使用2级或以上数据。关于详细信息，请参阅气象与水文通量数据指南。