TY  - Data
T1  - Dataset of Heihe integrated observatory network (eddy covariance system of Bajitan Gobi station, 2025)
A1  - Liu shaomin
A1  - Xu ziwei
A1  - Che Tao
A1  - Tan Junlei
A1  - Ren zhiguo
A1  - Zhang Yang
DO  - 10.12072/ncdc.heihe.db7617.2026
PY  - 2026
DA  - 2026-07-07
PB  - National Cryosphere Desert Data Center
AB  - This dataset contains the flux measurements from the desert station eddy covariance system (EC) in the midstream of the Heihe integrated observatory network from May 29 to December 29 in 2025. The site (100.23199° E, 38.88170° N) was located in the Bajitan, Zhangye City. The elevation is 1630 m. The EC was installed at a height of 4.7 m, and the sampling rate was 10 Hz. The sonic anemometer faced north, and the type of eddy covariance was closed-path (CSAT3B&Li7500DS).The raw data acquired at 10 Hz were processed using the Eddypro post-processing software, including the spike detection, lag correction of H2O/CO2 relative to the vertical wind component, sonic virtual temperature correction, coordinate rotation (2-D rotation), corrections for density fluctuation (Webb-Pearman-Leuning correction), and frequency response correction. The EC data were subsequently averaged over 30 min periods. The observation data quality was divided into three classes according to the quality assessment method of stationarity (Δst) and the integral turbulent characteristics test (ITC): class 1-3 (high quality), class 4-6 (good), class 7-8 (poor, better than gap filling data), class9 (rejected). In addition to the above processing steps, the half-hourly flux data were screened in a four-step procedure: (1) data from periods of sensor malfunction were rejected; (2) data collected before or after 1 h of precipitation were rejected; (3) incomplete 30 min data were rejected when the missing data constituted more than 10% of the 30 min raw record. There were 48 records per day, and the missing data were replaced with -9999. Suspicious data were marked in red. The released data contained the following variables: data/time, wind direction (Wdir, °), wind speed (Wnd, m/s), the standard deviation of the lateral wind (Std_Uy, m/s), virtual temperature (Tv, ℃), H2O mass density (H2O, g/m3), CO2 mass density (CO2, mg/m3), friction velocity (ustar, m/s), stability (L), sensible heat flux (Hs, W/m2), l
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/9d0231b3-b9aa-49ec-9622-f1d1e6ec843a
ER  -