申扎高寒草地围栏封育生态恢复工程碳水热通量数据集（2019-2022）

（1）本数据集是申扎站高寒草原和高寒湿地2019-2022年的碳水热通量数据集，包含净生态系统生产力NEP、生态系统呼吸RE、总初级生产力GPP、潜热通量、感热通量和净辐射等参数。（2）该数据集由4架涡度协方差系统集成，以高寒草原和高寒湿地涡度禁牧-放牧配对系统为研究主体。其中，高寒草原2架禁牧-放牧配对涡度系统相距约380米，高寒湿地2架禁牧-放牧配对涡度系统相距约270米。（3）涡度协方差数据集均采用国际上公认的相关数据标准处理方法，基本流程包括: 坐标旋转-WPL校正-系统自加热校正-异常值剔除-降水同期数据剔等。结合以往研究经验和共识以及申扎高寒生态系统的独特区位特征，参考以下质量控制标准（但鉴于自然界并非平稳发展，以尽可能多的保留原始数据为原则，部分保留数据未被强制使用这些控制标准）：一天中超过三倍标准差的数据、质量控制（0-1-2）为2的数据、夜间摩擦风速低于阈值（高寒草原0.1m/s、高寒湿地0.15m/s）的数据。(4)该数据集对认知高寒生态系统围栏封育生态工程碳、水热效应具有科学价值,也可以用于机理模型的矫正和验证等。

This dataset is a carbon-water-heat flux dataset collected at the Shenzha Station from 2019 to 2022 for alpine grasslands and alpine wetlands, including parameters such as Net Ecosystem Productivity (NEP), Ecosystem Respiration (RE), Gross Primary Productivity (GPP), latent heat flux, sensible heat flux, and net radiation.

This dataset integrates four eddy covariance systems, centered on paired grazing-exclusion and grazing eddy covariance systems in alpine grasslands and alpine wetlands. Specifically, the two paired systems for alpine grasslands are approximately 380 meters apart, while the two paired systems for alpine wetlands are approximately 270 meters apart.

All eddy covariance datasets are processed using internationally recognized standard data processing workflows, which include coordinate rotation, WPL correction, system self-heating correction, outlier removal, and concurrent precipitation data removal, among others. Drawing on previous research experiences and consensuses, as well as the unique geographical characteristics of the Shenzha alpine ecosystem, the following quality control criteria are referenced. However, given that the natural environment is not stationary, the principle of retaining as much original data as possible is followed, so some retained data are not forced to comply with these control standards: data exceeding three times the standard deviation within a day, data with a quality control flag (ranging from 0 to 2) equal to 2, and data with nighttime friction velocity below the threshold (0.1 m/s for alpine grasslands, 0.15 m/s for alpine wetlands).

This dataset has scientific value for understanding the carbon, water and heat effects of grazing-exclusion enclosure ecological engineering in alpine ecosystems, and can also be used for calibration and validation of mechanistic models, among other applications.

搜集汇总

背景与挑战

背景概述

该数据集是2019-2022年青藏高原申扎站高寒草原和高寒湿地的碳水热通量观测数据，包含净生态系统生产力、生态系统呼吸、总初级生产力和能量通量等关键参数，来源于4架涡度协方差系统的禁牧-放牧配对观测。数据经过国际标准处理和质量控制，时间分辨率为日，空间分辨率为1km-10km，旨在评估围栏封育生态恢复工程的碳、水热效应，并支持机理模型的验证。