JapanFlux2024 CN-HaM Qinghai Flux Research Site

In this study, we focused on the CO2 exchange during the growing season between the atmosphere and an alpine meadow ecosystem on the Qinghai-Tibetan Plateau. We determined the diurnal and seasonal changes in CO2 flux and their dependence on environmental factors, especially soil water content and soil temperature.
The research station is located in northeast Tibet, in a large valley oriented northwest-southeast and surrounded by the Qilian Mountains. The average altitude of the mountains is 4000 m and of the valley is 2900-3500 m. The Datong River passes to the south. The landscape is characterized by large mountain ranges with steep valleys and gorges interspersed with relatively level and wide inter-mountain grassland basins.
The climate at Haibei Station is characterized by low temperature and limited precipitation. The soil is a clay loam; its average thickness is 0.65 m. CO2 and H2O fluxes were measured by the eddy covariance method

本研究聚焦青藏高原高寒草甸生态系统与大气在生长季的二氧化碳（CO₂）交换过程，明确了二氧化碳通量的昼夜与季节变化特征，及其对环境因子的响应规律，尤其关注土壤含水量与土壤温度的调控作用。
本研究的野外观测站位于藏东北部，地处一条走向为西北-东南的大型山谷之中，四周被祁连山脉环绕。山地平均海拔达4000米，山谷区域海拔介于2900米至3500米之间。大通河从观测站南侧流过。该区域地貌以大型山系为主体，分布有陡峭的山谷与峡谷，其间点缀着地势相对平缓开阔的山间草原盆地。
海北站的气候以低温、降水匮乏为典型特征。该区域土壤为黏壤土，平均厚度达0.65米。本研究采用涡度协方差法（eddy covariance method）对二氧化碳与水汽（H₂O）通量进行了观测。