Dr. Tao Zhang Profile

Dr. Tao Zhang

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Proceedings Article | 23 January 2024 Paper

Estimating and analyzing the spatiotemporal pattern of net ecosystem productivity in Qinba area by combing remote sensing data and BIOME-BGC model

Siyu Chen, Tao Zhang, Kailei Xu, Jinlun Zhang

Proceedings Volume 12978, 129781C (2024) https://doi.org/10.1117/12.3020935

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Studying the spatial and temporal changes of NEP in the Qinba area can provide scientific and technological data support for the realization of regional carbon neutrality goals. We use site parameters, geographical conditions monitoring data, MCD43A3 and a series of daily meteorological grid data to simulate daily NEP dataset at a spatial resolution of 500 m×500 m during 2000-2020. The results show that the spatial distribution of NEP in the ecosystem of the Qinba area is significantly different. Except for 2005, the vegetation in Qinba area is dominated by carbon absorption from 2000 to 2020. From the perspective of spatial change, the area of NEP significantly increased is 2657.37 km², mainly distributed in the northern Qinling Mountain area above 2000 meters of elevation and the southern part of Bashan area. From the perspective of seasonal changes, the proportion of carbon sink vegetation area in spring, summer and autumn is 90.3%, 99.1% and 91% respectively. Under the RCP4.5 scenario model, the NEP in the Qinba area is predicted to reach 33.41 gCm^-2a^-1 in the next 80 years. The meteorological factors that play a positive role in the increase of NEP are CO₂ concentration, temperature and precipitation.

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