TY  - Data
T1  - Heihe River eco hydrological remote sensing experiment: multi-scale observation experiment of surface evapotranspiration on non-uniform underlying surface - flux observation matrix data set (point 1 large aperture scintillator-2012)
A1  - Liu shaomin
DO  - 10.12072/ncdc.NIEER.db0033.2020
PY  - 2021
DA  - 2021-08-27
PB  - National Cryosphere Desert Data Center
AB  - The data set contains the observation data of large aperture scintillator at point 1 in the flux observation matrix. There are two large aperture scintillators with models of bls900 and zzlas at point 1, and bls900 at the north end_ 1 receiver and zzlas_ The transmitting end of 1 is bls900 at the south end_ 1 transmitter and zzlas_ 1. The observation time is from June 7, 2012 to September 19, 2012 and from June 16, 2012 to September 19, 2012 respectively. The station is located in the farmland of Yingke Irrigation District, Zhangye City, Gansu Province. The underlying bread contains corn fields, greenhouses and villages, mainly corn fields. The longitude and latitude at the north end of tower 1 are 100.3524e, 38.8547n, and the longitude and latitude at the south end are 100.3510e, 38.8841n, with an altitude of 1552.75m. The effective height of the large aperture scintillator is 33.45m, the optical path length is 3256m, and the sampling frequency is 1min.The data released by the large aperture scintillator is the 30min average data after processing and quality control. The sensible heat flux is mainly obtained by iterative calculation based on Monin Obukhov similarity theory in combination with the data of automatic weather station. The main quality control steps include: (1) eliminating the data of cn2 saturation（ 2) Eliminate the data with weak demodulated signal strength（ 3) Eliminate the data of precipitation time and one hour before and after it（ 4) Eliminate the data of weak turbulence under stable conditions (U * less than 0.1M / s).Two notes on data release: (1) Las data of point 1 is based on bls900_ 1 mainly, bls900 before (including) 7.22_ 1. The missing data is marked as - 6999, followed by zzlas after 7.22_ 1. If both are missing, it is marked with - 6999（ 2) Data header: date / time: date / time (Format: yyyy MM DD HH: mm: SS), cn2: structural parameter of air refractive index (unit: m-2 / 3), H_ Las: sensible heat flux (unit: w / m2).For multi-scale ob
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/aaa2e52b-0b50-41b3-811a-0431d8a84920
ER  -