A dataset of carbon and water fluxes observation in subtropical evergreen broad-leaved forest in Jinfo Mountain from 2020 to 2021

Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station was officially approved for construction in late 2021 by China’s Ministry of Science and Technology. As the main observation field, based on the eddy covariance technique, long-term and continuous measurements of carbon and water fluxes of the subtropical evergreen broad-leaved forest ecosystem has been operational since three years ago. Based on the flux data processing system of ChinaFLUX, this work produced the standard dataset of the subtropical evergreen broad-leaved forest ecosystem including carbon and water fluxes, as well as the key meteorological data at the Jinfo station from 2020 to 2021. This dataset can provide significant data support to analyze the carbon source/sink of typical forest ecosystem, the coupling relationship between carbon and water cycles, as well as their response mechanisms to global climate change.This dataset consists of 4 EXCEL data files, which are divided into 2 categories, namely flux data and meteorological data. The dataset is comprised of net ecosystem carbon exchange, gross primary productivity, ecosystem respiration, latent heat, sensible heat, as well as air temperature/humidity, wind speed/direction, soil temperature/humidity, precipitation, total radiation, net radiation and photosynthetically active radiation. The meteorological data are divided into 10 min, 30 min, daily, monthly and annual scales, and flux data are divided into 30 min, daily, monthly and annual scales.

重庆金佛山喀斯特生态系统国家野外科学观测研究站于2021年底获中国科学技术部正式批复立项建设。作为该站核心观测场地，亚热带常绿阔叶林生态系统碳水通量的长期连续观测工作自三年前便已基于涡度协方差技术（eddy covariance technique）正式投入运行。依托中国通量观测研究网络（ChinaFLUX）的通量数据处理系统，该观测项目生成了金佛山站2020至2021年的亚热带常绿阔叶林生态系统标准数据集，涵盖碳水通量及关键气象数据。本数据集可为典型森林生态系统的碳源/汇分析、碳水循环耦合关系及其对全球气候变化的响应机制研究提供重要数据支撑。本数据集包含4个EXCEL数据文件，分为通量数据与气象数据两大类。数据集涵盖的具体指标包括：生态系统碳交换净量（net ecosystem carbon exchange）、总初级生产力（gross primary productivity）、生态系统呼吸、潜热通量（latent heat）、感热通量（sensible heat），以及气温/湿度、风速/风向、土壤温度/湿度、降水量、总辐射、净辐射和光合有效辐射（photosynthetically active radiation）。其中气象数据分为10分钟、30分钟、日、月、年共5种时间尺度，通量数据则分为30分钟、日、月、年共4种时间尺度。