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Carbon flux towers are a very useful tool for conducting studies on carbon dioxide exchange capacity at the forest canopy and atmospheric interface, particularly in
quantifying the long-term carbon capture capacity of tropical forests in South Asia and other important meteorological parameters.
Dinghushan Station, which has been officially launched for carbon flux monitoring since October 2002, is the earliest South Asian tropical forest observation station
established by the ecological network of the Chinese Academy of Sciences.
The data obtained so far help to understand the potential of the zonal forest of the first national nature reserve in Dinghushan in the ecosystem carbon sequestration service function, and help to find better regional forest management and protection methods
on the surface.
Based on the carbon flux monitoring data supported by long-term biological monitoring and vorticity-related technologies in Dinghushan Station, researchers at Dinghushan Station have recently focused on "carbon peaking" and "carbon neutrality" (double carbon) The key scientific problems that need to be solved by the program to play the role of carbon flux towers have the following important findings and published in relevant academic journals:
1.
The vorticity covariance technique was used to accurately determine the amount of
forest-atmospheric carbon exchange.
Seasonal trends in daily ecosystem carbon fluxes are observed, indicating sensitivity to climatic factors such as temperature, precipitation and sunlight
.
This study clarifies that Dinghushan Nature Reserve can be used as a model forest ecosystem to reveal the role
of forests in the absorption and storage of CO2 in the atmosphere.
The results are based on "An inter-annual comparative study on ecosystem carbon exchange characteristics in the Dinghushan Biosphere Reserve, a dominant subtropical evergreen forest ecosystem" Published in Frontiers in Plant Science in October 2021 (IF5- Year=7.
255), link to paper: https://doi.
org/10.
3389/fpls.
2021.
715340
A study of 12-year (2003-2014) monitoring data in Dinghushan Nature Reserve showed that droughts are increasing in frequency and intensity, a phenomenon that is affecting carbon sequestration
in forests in unique ways.
Unlike other ecosystems around the globe, the reserve was found to absorb more carbon during the dry months than during the rainy season, with seasonal droughts leading to increased
carbon in subtropical forests.
The results, titled "Seasonal droughts drive up carbon gain in a subtropical forest," were published in the Journal of September 2022 Plant Ecology (IF5-Year=2.
676), link to https://doi.
org/10.
1093/jpe/rtac088
3.
It was demonstrated that eddy current covariance techniques can be used to measure carbon sequestration and associated economic value impacts
.
The study shows that a direct estimate of the economic value of carbon shows that an average of 5,300 tonnes of carbon sequestration per year in Dinghushan Nature Reserve is equivalent to 3.
3 million yuan (about US$530,000) of economic added value
in the region.
The result is titled "Carbon flux variation and associated biomass energy storage economic value implications in the Dinghushan Biosphere Reserve," 2022 Published in the Journal of Cleaner Production (IF5-Year=11.
016) in November: https://doi.
org/10.
1016/j.
jclepro.
2022.
134274
These published studies show at another level that vorticity flux data are very useful
in understanding the physiological and ecological functions of forests.
These studies are timely for the implementation of the "dual carbon" plan, and the assessment of economic value is highly affirmed by peer experts that the paper is very interesting from both a scientific point of view and an educational point of view), contributing to the development of policies
to further protect and manage tropical forest ecosystem types in South Asia.
Brian Njoroge, a doctoral student at South China Botanical Garden, is the first author of the above paper, his supervisor is Professor Li Yuelin as the corresponding author, and the team members of Dinghushan Station contributed their collective strength to the publication of the paper and played their respective important roles.
The team is working on future related carbon flux projects, using vorticity flux data to expand scientific understanding
of forest ecosystems in different climate zones.
Figure 1.
Dinghushan Station Carbon Flux Observation System
Figure 2.
Seasonal trends in measured total primary productivity and CO2 carboxylation rates (Paper 1)
Figure 3.
"Seasonal Drought Leads to Increased Carbon in Subtropical Forests" (Paper 2)
Figure 4.
Flow diagram of data acquisition and analysis (Paper 3)
