%0 Dataset
%T Heihe River eco hydrological remote sensing test: hydrometeorological observation network data set (huyanglin station eddy correlator-2015)
%J National Cryosphere Desert Data Center
%I National Cryosphere Desert Data Center(www.ncdc.ac.cn)
%U http://www.ncdc.ac.cn/portal/metadata/40e6af3e-198a-4d6a-a20a-f26c9ca98868
%W NCDC
%R 10.12072/ncdc.nieer.db3536.2023
%A Liu shaomin
%A Li xin
%A Chetao
%A Xu ziwei
%A Ren zhiguo
%A Tan Junlei
%K latent heat flux;carbon dioxide flux;eddy correlator
%X The data set contains the eddy correlator observation data of Populus euphratica forest station downstream of Heihe hydrometeorological observation network from January 1, 2015 to December 31, 2015. The station is located in sidaoqiao, Ejina Banner, Inner Mongolia, with Populus euphratica forest on the underlying surface. The longitude and latitude of the observation point are 101.1236e, 41.9928n and 876m above sea level. The frame height of eddy correlator is 22m, the sampling frequency is 10Hz, the ultrasonic direction is due north, and the distance between ultrasonic anemometer (csat3) and CO2 / H2O analyzer (li7500) is 17cm The original observation data of eddy correlator is 10Hz, and the released data is the 30 minute data processed by eddypro software. The main steps of processing 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 0.2m / 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. From April 22 to April 25, due to the calibration of vortex system li7500, the data was missing; From August 17 to September 5, there was a problem with the memory card, resulting in intermittent data.The published observation data include: date / time, wind direction WDIR