The law of carbon sequestration of aged Korean pine forest in Changbai Mountain was revealed.

On December 23, the project "study on carbon sequestration function of aged broad-leaved Korean pine forest in Changbai Mountain", which was conducted by the National Field Scientific observation and Research Station of Changbai Mountain Forest ecosystem in Jilin Province, passed the expert review organized by Changchun Branch of Chinese Academy of Sciences in Changchun. Experts believe that the integration of a variety of methods in the project, component flux change and process mechanism research has reached the international advanced level.

As the main body of terrestrial ecosystem, the process and mechanism of forest carbon cycle play an important role in understanding the function of forest carbon sequestration and its impact and response to global climate change. the carbon sequestration function of old forests has always been a key scientific issue in evaluating the uncertainty of forest carbon balance, which has attracted much attention. At present, the primitive broad-leaved Korean pine forest in Changbai Mountain is close to the top stage of forest development and potential (forest age is more than 200 years old). The systematic study of its carbon cycle process and its role in global balance has been lack of scientific demonstration.

In order to explore the relationship between forest ecosystem management and carbon sequestration in Changbai Mountain region, scientifically evaluate the carbon budget trend of temperate forests in China, and provide scientific basis for national carbon sequestration diplomacy, in 2000, Jilin Changbai Mountain Ecological Station undertook the knowledge innovation project of the Chinese Academy of Sciences and the national fund project "Research on carbon sequestration function of aged broad-leaved Korean pine forest in Changbai Mountain". After tackling key problems for more than 7 years, scientists and technicians adopted the internationally advanced micrometeorological observation technology-vorticity correlation method, and combined with ecosystem investigation and model simulation methods, quantitatively revealed the cycle process and mechanism of the aged broad-leaved Korean pine forest in Changbai Mountain. It is found that the aged broad-leaved Korean pine forest in Baishan is still a carbon sink at present. The carbon fluxes of different components of aged broad-leaved Korean pine forest ecosystem in Changbai Mountain were quantitatively given, and the observation method of carbon flux in winter was modified, which was recognized by international counterparts. It provides a scientific basis for scientific evaluation of the impact and response of temperate forests on climate change and the intensity of carbon sequestration in China. At the same time, a complete carbon flux observation platform of temperate broad-leaved Korean pine forest was established, a number of carbon flux observation techniques were developed, a large number of observation data were accumulated, and a database was constructed.

This innovative research on carbon sequestration function of aged broad-leaved Korean pine forest in Changbai Mountain has important scientific significance for revealing the law and function of carbon budget of aged forest. It has important practical significance in guiding the management of regional forest carbon sequestration and emission reduction to deal with global climate change.