%0 Dataset
%T Heihe River Ecological hydrological remote sensing test: hydrometeorological observation network data set (sidaoqiao super station eddy correlator-2014)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/81c1f572-010d-466e-bb53-789436cbaf65
%W NCDC
%R 10.12072/ncdc.nieer.db3473.2023
%A Xu ziwei
%A Liu shaomin
%K Hydrometeorological observation network;Sensible heat flux;Tamarix;CO2 flux;Eddy correlator;Latent heat flux
%X The data set contains the eddy related observation data of sidaoqiao super station downstream of Heihe hydrometeorological observation network from January 1, 2014 to December 31, 2014. The station is located in sidaoqiao, Ejina Banner, Inner Mongolia, with Tamarix on the underlying surface. The longitude and latitude of the observation point are 101.1374e, 42.0012n, and the altitude is 873 M. The frame height of eddy correlator is 8m, the sampling frequency is 10Hz, the ultrasonic direction is due north, and the distance between ultrasonic anemometer (csat3) and CO2 / H2O analyzer (li7500a) is 15cm.The original observation data of eddy correlator is 10Hz, and the released data is the 30 minute data processed by eddypro software. The main processing steps include: field value elimination, delay time correction, coordinate rotation (quadratic coordinate rotation), frequency response correction, ultrasonic virtual temperature correction and density (WPL) correction. At the same time, the quality of each flux value is evaluated, mainly the atmospheric stability（ Δ St) and turbulence similarity characteristics (ITC). The 30min flux value output by eddypro software is also screened:（ 1) Eliminate the data in case of instrument error（ 2) Eliminate the data 1H before and after precipitation（ 3) Eliminate the data with a loss rate greater than 10% every 30min in the 10Hz original data（ 4) Eliminate the observation data of weak turbulence at night (U  less than 0.1M / s) The average period of observation data is 30 minutes, 48 data a day, and the missing data is marked as - 6999. Suspicious data caused by instrument drift and other reasons shall be identified in red font The published observation data include: date / time, wind direction WDIR (°), horizontal wind speed wnd (M / s), standard deviation of lateral wind speed STD_ Uy (M / s), ultrasonic virtual temperature TV (℃), water vapor density H2O (g / m3), carbon dioxide concentration CO2 (mg / m3), friction velocity ust