黑河流域地表过程综合观测网（四道桥超级站大孔径闪烁仪-2023）

该数据集包含了黑河流域地表过程综合观测网下游四道桥站的大孔径闪烁仪通量观测数据。下游四道桥站架设了BLS450和BLS900型号的大孔径闪烁仪，北塔为接收端，南塔为发射端。观测时间为2023年1月1日至2023年12月31日。站点位于内蒙古额济纳旗，下垫面是柽柳、胡杨、裸地和耕地。北塔的经纬度是101.137E，42.008N，南塔的经纬度是101.131E，41.987N，海拔高度约873m。大孔径闪烁仪的有效高度25.5m，光径长度是2350m，采样频率是1min。
大孔径闪烁仪原始观测数据为1min，发布的数据为经过处理与质量控制后的数据，其中感热通量主要是结合自动气象站观测数据，基于莫宁-奥布霍夫相似理论通过迭代计算得到，主要的质量控制步骤包括：（1）剔除Cn2达到饱和的数据（BLS900&BLS450：Cn2>7.25E-14）；（2）剔除解调信号强度较弱的数据（BLS900&BLS450：Average X Intensity<1000）；（3）剔除降水时刻的数据。在迭代计算过程中，对于BLS900&BLS450，选取Thiermann and Grassl(1992)的稳定度普适函数。
关于发布数据的几点说明：（1）下游LAS数据以BLS900为主，其次为BLS450，最终缺失时刻以-6999标记。（2）数据表头：Date/Time ：日期/时间（格式：yyyy/m/d h:mm），Cn2 ：空气折射指数结构参数（单位：m-2/3），H：感热通量（单位：W/m2）。数据时间的含义，如0:30代表0:00-0:30的平均；数据以*.xlsx格式存储。
黑河流域地表过程综合观测网或站点信息请参考Liu et al. (2018)和Liu et al. (2023)。

This dataset contains Large Aperture Scintillometer (LAS) flux observation data from the Sidaoqiao Station in the lower reaches of the Heihe River Basin Surface Process Comprehensive Observation Network. Two models of LAS, BLS450 and BLS900, were installed at the Sidaoqiao Station, with the north tower serving as the receiving end and the south tower as the transmitting end. The observation period spans from January 1, 2023 to December 31, 2023. The station is located in Ejina Banner, Inner Mongolia, and its underlying surface consists of Tamarix, Populus euphratica, bare land and cultivated land. The geographic coordinates of the north tower are 101.137°E, 42.008°N, while those of the south tower are 101.131°E, 41.987°N, with an altitude of approximately 873 m. The effective height of the LAS is 25.5 m, the optical path length is 2350 m, and the sampling frequency is 1 minute.

The original LAS observation data has a 1-minute temporal resolution. The released dataset has undergone processing and quality control. The sensible heat flux was mainly calculated iteratively based on the Monin-Obukhov Similarity Theory, combined with observations from the automatic weather station. The primary quality control procedures are as follows: (1) Removing data with saturated Cn² (for both BLS900 and BLS450: Cn² > 7.25E-14); (2) Removing data with weak demodulation signal strength (for both BLS900 and BLS450: Average X Intensity < 1000); (3) Removing data collected during precipitation events. During the iterative calculation, the universal stability function proposed by Thiermann and Grassl (1992) was selected for both BLS900 and BLS450.

Notes on the released dataset: (1) The LAS data from the lower reaches mainly adopts BLS900, followed by BLS450. Missing final values are marked with -6999. (2) Table headers: Date/Time: date/time (format: yyyy/m/d h:mm), Cn²: refractive index structure parameter of air (unit: m⁻²/³), H: sensible heat flux (unit: W/m²). The data time stamp represents the average value of the corresponding 30-minute period; for example, 0:30 corresponds to the average from 0:00 to 0:30. The data is stored in *.xlsx format.

For information about the Heihe River Basin Surface Process Comprehensive Observation Network or the station, please refer to Liu et al. (2018) and Liu et al. (2023).

搜集汇总

背景与挑战

背景概述

该数据集为2023年黑河流域四道桥超级站的大孔径闪烁仪观测数据，包含感热通量等关键地表过程参数，经过严格质量控制，适用于地表能量平衡和陆气相互作用研究。