兰州大学寒旱区科学观测网络CARN（敦煌站气象要素梯度观测系统-2021）

该数据集包含了2021年1月1日至2021年12月31日兰州大学寒旱区科学观测网络敦煌站气象要素梯度观测系统数据。站点位于甘肃敦煌西湖，下垫面是湿地。观测点的经纬度是93.709E，40.348N，海拔994m。二维超声风速/风向传感器和空气温湿度传感器分别架设在4m、8m处，朝向正北；气压计安装在1m采集箱内；翻斗式雨量计安装在塔4m处；红外温度计安装在4m处，朝向正南，探头朝向垂直向下；土壤热通量板（自校正式）（2块）依次埋设在塔南侧植被下5cm和10cm处；土壤温/湿/电导率传感器和土壤水势传感器埋设在塔南侧植被下5cm和20cm处；光合有效辐射传感器、日照时数传感器以及四分量辐射仪安装在4m处，朝向正南。观测项目有：风速（WS_4m、WS_8m）(单位：米/秒)、风向（WD_4m、WD_8m）(单位：度)、空气温湿度（Ta_4m、Ta_8m和RH_2m、RH_4m、RH_8m）(单位：摄氏度、百分比)、气压（PA）(单位：百帕)、降水量（P）(单位：毫米)、四分量辐射（SWIN、SWOUT、LWIN、LWOUT、Rn）(单位：瓦/平方米)、地表辐射温度（TC）(单位：摄氏度)、土壤热通量（SHF）(单位：瓦/平方米)、土壤水分（SWC）(单位：百分比)、土壤温度（Ts）(单位：摄氏度) 、土壤水势（SWP）（单位：千帕）、土壤电导率（EC）（单位：微西门子/厘米）光合有效辐射（PPFD）(单位：微摩尔/平方米秒)、日照时数（Sun_time）（单位：小时）。 观测数据的处理与质量控制：（1）确保每天48个数据（每30min）；缺失或异常数据用-6999代替；（2）剔除有重复记录的时刻；（3）删除了明显超出物理意义或超出仪器量程的数据；（4）数据中以红字标示的部分为有疑问的数据；（5）日期和时间的格式统一，并且日期、时间在同一列。如，时间为：2021-06-10 10:30。

This dataset contains meteorological element gradient observation system data from the Dunhuang Station of the Cold and Arid Regions Science Observation Network of Lanzhou University, covering the period from January 1, 2021 to December 31, 2021. The station is located in Xihu, Dunhuang, Gansu, with a wetland as its underlying surface. The coordinates of the observation point are 93.709°E, 40.348°N, and the elevation is 994 m. Two-dimensional ultrasonic wind speed/direction sensors and air temperature and humidity sensors are installed at heights of 4 m and 8 m, facing due north; a barometer is installed in a 1 m-high acquisition box; a tipping-bucket rain gauge is installed at 4 m on the tower; an infrared thermometer is installed at 4 m, facing due south with the probe pointing vertically downward; two self-calibrating soil heat flux plates are buried at depths of 5 cm and 10 cm under vegetation on the south side of the tower, respectively; soil temperature/moisture/electrical conductivity sensors and soil water potential sensors are buried at depths of 5 cm and 20 cm under vegetation on the south side of the tower; photosynthetically active radiation sensors, sunshine duration sensors and a four-component radiometer are installed at 4 m, facing due south. Observation items include: wind speed (WS_4m, WS_8m) (unit: m/s), wind direction (WD_4m, WD_8m) (unit: °), air temperature and humidity (Ta_4m, Ta_8m, RH_2m, RH_4m, RH_8m) (unit: °C, %), barometric pressure (PA) (unit: hPa), precipitation (P) (unit: mm), four-component radiation (SWIN, SWOUT, LWIN, LWOUT, Rn) (unit: W/m²), surface radiative temperature (TC) (unit: °C), soil heat flux (SHF) (unit: W/m²), soil moisture (SWC) (unit: %), soil temperature (Ts) (unit: °C), soil water potential (SWP) (unit: kPa), soil electrical conductivity (EC) (unit: μS/cm), photosynthetically active radiation (PPFD) (unit: μmol/(m²·s)), sunshine duration (Sun_time) (unit: h). Data processing and quality control of the observation data: (1) Ensure 48 daily data records (one per 30 minutes); missing or abnormal data are replaced with -6999; (2) Remove duplicate records at the same time stamp; (3) Delete data that obviously exceeds physical significance or instrument measurement range; (4) The parts marked in red in the data are questionable data; (5) The date and time formats are unified, and date and time are recorded in the same column. For example, the time format is: 2021-06-10 10:30.

搜集汇总

背景与挑战

背景概述

该数据集包含2021年兰州大学敦煌站气象要素梯度观测系统的数据，涵盖风速、风向、温湿度、降水、辐射等多种气象和土壤参数，数据经过严格质量控制，时间分辨率为每30分钟。