西风-季风相互作用区非均匀下垫面地气相互作用机载通量观测试验数据

本数据包含第二次青藏高原综合科学考察研究任务一专题三在四个重点试验区的机载水热通量试验观测数据，分别为：（1）2021年7月敦煌绿洲和荒漠下垫面观测；（2）2022年6月大理山-盆-湖系统观测；（3）2023年8-9月格尔木荒漠、草地和湿地下垫面观测；（4）2024年8月珠峰地区观测。原始数据由搭载于无人机平台上的高频率、高精度的压差式风速计、空气温度传感器、水汽浓度传感器和惯性导航系统等集成设备获取，采用涡动相关原理方法处理获得沿航线分布的水热通量观测。处理的主要步骤包括：原始数据野点剔除、三维风速计算、三维风速野点剔除，高低频空气温度数据融合、二次坐标旋转、频率响应修正、WPL修正以及基于大气稳定性（Δst）、湍流相似性（ITC）特征检验的通量数据质量评价。感热、潜热通量的质量标识分为九个等级，其中1~3级质量最优。

This dataset contains airborne hydrothermal flux experimental observation data collected under Task 1, Topic 3 of the Second Tibetan Plateau Scientific Expedition and Research (STEP) program at four key experimental zones, specifically: (1) Observations of oasis and desert underlying surfaces in Dunhuang in July 2021; (2) Observations of the Dali mountain-basin-lake system in June 2022; (3) Observations of desert, grassland and wetland underlying surfaces in Golmud in August–September 2023; (4) Observations in the Mount Qomolangma (Everest) region in August 2024. The raw data were collected by integrated instruments mounted on unmanned aerial vehicle (UAV) platforms, including high-frequency and high-precision differential pressure anemometers, air temperature sensors, water vapor concentration sensors, and inertial navigation systems. Hydrothermal flux observations along the flight routes were obtained via the eddy covariance method. The core processing procedures are as follows: outlier removal from raw data, calculation of three-dimensional (3D) wind speed, outlier removal from 3D wind speed data, fusion of high- and low-frequency air temperature data, double coordinate rotation, frequency response correction, WPL correction, and quality evaluation of flux data based on tests of atmospheric stability (Δst) and turbulence similarity (ITC) characteristics. The quality flags for sensible and latent heat fluxes are categorized into nine levels, among which Levels 1 to 3 correspond to the highest data quality.

搜集汇总

背景与挑战

背景概述

该数据集是第二次青藏高原综合科学考察研究的一部分，提供2021年至2024年在西风-季风相互作用区四个非均匀下垫面试验区（如敦煌、大理、格尔木、珠峰）的机载水热通量观测数据，通过无人机搭载高精度传感器基于涡动相关原理采集和处理，包括感热和潜热通量，并进行了严格的质量控制，适用于研究地气相互作用及其气候效应。