%0 Dataset
%T Heihe River eco hydrological remote sensing test: hydrometeorological observation network data set (whirl correlator of huazhaizi desert station-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/5c662aae-2f5d-4f44-839e-96ad07d84a93
%W NCDC
%R 10.12072/ncdc.nieer.db3474.2023
%A Liu shaomin
%K Desert;Eddy correlator;Sensible heat flux;Latent heat flux;Hydrometeorological observation network;CO2 flux
%X The data set contains the eddy related observation data of huazhaizi desert station in the middle reaches of Heihe hydrometeorological observation network from January 1, 2014 to December 31, 2014. The station is located in Zhangye City, Gansu Province, and the underlying surface is desert. The longitude and latitude of the observation point are 100.31860e, 38.76519n and 1731.00m above sea level. The frame height of vortex correlator is 2.85m, the sampling frequency is 10Hz, the ultrasonic direction is due north, and the distance between ultrasonic anemometer (csat3) and CO2 / H2O analyzer (li7500) is 15cmThe 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. From March 1 to March 31, there was a problem with the data stored in the memory card, resulting in the loss of 10Hz data, which was replaced by the 30min flux data output by the collector