黑河流域地表过程综合观测网（阿柔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上游阿柔站的大孔径闪烁仪通量观测数据。上游阿柔站分别架设了BLS900和RR-RSS460型号的大孔径闪烁仪，北塔为RR-RSS460的接收端和BLS900的发射端，南塔为RR-RSS460的发射端和BLS900的接收端。观测时间为2023年1月1日至2023年12月31日。站点位于青海省祁连县阿柔乡草达坂村，下垫面是高寒草地。北塔的经纬度是100.4712E，38.0568N，南塔的经纬度是100.4572E，38.0384N，海拔高度约3033m。大孔径闪烁仪的有效高度13.0m，光径长度是2390m，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：Cn2>7.25E-14，RR-RSS460：Cn2>7.84 E-14）；（2）剔除解调信号强度较弱的数据（BLS900：Average X Intensity<1000；RR-RSS460：Demod>-20mv）；（3）剔除降水时刻的数据。在迭代计算过程中，对于BLS900，选取Thiermann and Grassl(1992)的稳定度普适函数；对于RR-RSS460，选取Andreas(1988)的稳定度普适函数。
关于发布数据的几点说明：（1）上游LAS数据以BLS900为主，缺失时刻由RR-RSS460观测补充，两者都缺失则以-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Che et al. (2019)。

This dataset contains large-aperture scintillometer (LAS) flux observation data from the Arou Station in the upper reaches of the Heihe River Basin Surface Process Comprehensive Observation Network. Two large-aperture scintillometers of models BLS900 and RR-RSS460 were installed at the upper Arou Station. The north tower serves as the receiving end of RR-RSS460 and the transmitting end of BLS900, while the south tower acts as the transmitting end of RR-RSS460 and the receiving end of BLS900. The observation period spans from January 1, 2023 to December 31, 2023. The station is located in Caodaban Village, Arou Township, Qilian County, Qinghai Province, with an alpine grassland underlying surface. The coordinates of the north tower are 100.4712°E, 38.0568°N, and those of the south tower are 100.4572°E, 38.0384°N, with an altitude of approximately 3033 m. The effective height of the large-aperture scintillometers is 13.0 m, the optical path length is 2390 m, and the sampling frequency is 1 minute.

The original observation data from the large-aperture scintillometers are at 1-minute resolution. The released data are post-processed and quality-controlled. The sensible heat flux is mainly calculated iteratively based on the Monin-Obukhov similarity theory (MOST), combined with observations from automatic weather stations. The main quality control procedures are as follows:
(1) Eliminate data with saturated Cn² values: BLS900: Cn² > 7.25×10^-14 m^-2/3; RR-RSS460: Cn² >7.84×10^-14 m^-2/3;
(2) Remove data with weak demodulated signal strength: BLS900: Average X Intensity < 1000; RR-RSS460: Demod > -20 mV;
(3) Exclude data collected during precipitation events.

During the iterative calculation, the universal stability functions of Thiermann and Grassl (1992) and Andreas (1988) are adopted for BLS900 and RR-RSS460, respectively.

Notes on the released data:
(1) The upper reach LAS dataset mainly uses BLS900 observations, with missing time slots supplemented by RR-RSS460 measurements. If both are missing, the value -6999 is used as the marker.
(2) Table headers: Date/Time: Date/time (format: yyyy/m/d h:mm); Cn²: Air refraction index structure parameter (unit: m^-2/3); H: Sensible heat flux (unit: W/m²). The meaning of the data timestamp: for example, 0:30 represents the average value from 0:00 to 0:30. The data is stored in *.xlsx format.

For information on the Heihe River Basin Surface Process Comprehensive Observation Network or the stations, please refer to Liu et al. (2018) and Che et al. (2019).

搜集汇总

背景与挑战

背景概述

该数据集是2023年黑河流域地表过程综合观测网中阿柔超级站的大孔径闪烁仪观测数据，位于青海省祁连县高寒草地环境，主要提供感热通量和空气折射指数结构参数（Cn2）的1分钟分辨率数据。数据经过基于莫宁-奥布霍夫相似理论的迭代计算和严格质量控制（如剔除饱和、弱信号和降水时刻数据），适用于地表能量交换和陆面过程研究。