LIAISE_ELS-PLANS_UKMO_MTO-01MIN_L2

This dataset contains  

Vertical characteristics: 

Air temperature at 1.2m, 10m, 25m, 50m.   

Relative humidity at 1.2m, 10m, 25m, 50m. 

Absolute humidity at 2m, 10m (these ae uncalibrated measurements from the Licor and Krypton, respectively, and were used in calculating humidity fluxes only. Please use relative humidity and air temperature to calculate absolute humidity if required.)  

Wind speed, direction, gust strength at 2m, 10m, 25m, 50m (measured with both north and south facing sonic anemometers.) 

Visibility at 2m,. 

Pressure at 2m. 

Upwards and downwards shortwave and longwave radiation at 2m 

Surface measurements: 

Tipping bucket rainfall. 

Infra-red surface temperatures taken at 2m (measured with both north and south facing thermometers.) 

Grass canopy temperature and relative humidity at 2 locations with slightly different characteristics and to ensure observation resilience. 

Subsurface characteristics: 

Soil temperatures at 1 cm, 4 cm, 10cm, 17cm, 35cm. 

Soil moisture at surface, 10cm, 20cm, 30cm, 40cm

Soil heat flux taken at 2cm at 2 locations to examine heterogeneity and ensure observation resilience. 

The data is column oriented with quality flags preceding the data column.   

Quality flags: | = data OK, X = data flagged as bad, dummy value of 1x1011 applied, m = data missing, ? = possibly suspect data, do not use for bulk processing/statistics, c = calibration suspect, D = sonic orientation bad for wind direction – applied to data derived from sonic anemometers only and indicates that the wind and turbulence data for those times in particular may not be reliable. 

These measurements have been done at Els Plans, Spain (41.590111N, 1.029363 W, 334m) 

Altitude 334m 

Latitude 41.590111

Longitude 1.029363

本数据集包含如下内容：

一、垂直观测特征
1. 1.2m、10m、25m、50m高度处的空气温度。
2. 1.2m、10m、25m、50m高度处的相对湿度。
3. 2m、10m高度处的绝对湿度（注：该两组测量数据分别来自Licor与Krypton仪器的未校准结果，仅用于湿度通量计算。若需自行计算绝对湿度，请使用相对湿度与空气温度数据）。
4. 2m、10m、25m、50m高度处的风速、风向及阵风强度，采用北向与南向声学风速仪（sonic anemometer）同步测量。
5. 2m高度处的能见度。
6. 2m高度处的大气压力。
7. 2m高度处的向上、向下短波辐射与长波辐射。

二、地面观测项目
1. 翻斗式雨量观测数据。
2. 2m高度处的红外地表温度，采用北向与南向温度计同步测量。
3. 在两个特性略有差异的测点开展草冠层温度与相对湿度观测，以保障观测鲁棒性。

三、地下观测特征
1. 1cm、4cm、10cm、17cm、35cm深度处的土壤温度。
2. 地表、10cm、20cm、30cm、40cm深度处的土壤含水量。
3. 在两个测点的2cm深度处获取土壤热通量数据，用于分析土壤非均质性并保障观测鲁棒性。

本数据集采用列存储格式，数据列前附带质量标记字段。

质量标记说明：| 表示数据正常有效；X 表示数据标记为无效，此时已填充虚拟值1×10¹¹；m 表示数据缺失；? 表示数据疑似异常，请勿用于批量处理或统计计算；c 表示数据存在校准嫌疑；D 表示声学风速仪定向异常（该标记仅应用于声学风速仪衍生的风向数据，表明对应时段的风速与湍流数据可能不可靠）。

本数据集的观测站点位于西班牙埃尔斯普兰斯（Els Plans），地理坐标为北纬41.590111°，西经1.029363°，海拔334米。