Recently, researchers at the First Institute of Oceanography of the Ministry of Natural Resources have made new progress in the study of soil carbon storage in the coastal zone, and the research results have been published in full text in the academic journals catena (if=5.198) and ecological indicators (sci zone 2, if=4.958). The paper was jointly completed by the Research Center for Coastal Zone Science and Marine Development Strategy of a Marine University, Chi Yuan, Associate Researcher of key laboratory of Coastal Zone Science and Integrated Management Of the Ministry of Coastal Zone Science and Integrated Management (first author), and Senior Engineer Liu Dahaizheng (corresponding author).
Soil is one of the most important carbon reservoirs on Earth and plays an important role in global climate change and elemental biogeochemical cycles. As the main body of the "coastal blue carbon sink", the coastal wetland is a key area to promote the realization of the national goal of "carbon peaking and carbon neutrality". The soil carbon pool of coastal wetlands is an important part of the blue carbon sink, which can capture and bury organic carbon, and is the basic carrier for carbon storage. Figuring out the spatial characteristics of soil organic carbon storage in coastal wetlands plays an important role in accurately judging the capacity and potential of blue carbon sinks in coastal zones and identifying the main influencing factors of coastal wetland carbon pools. However, due to the high difficulty of investigation and complex external interference in coastal wetlands, how to achieve high-precision and low-cost soil organic carbon storage estimation of coastal wetlands has become an important scientific issue of widespread concern at home and abroad. In view of this scientific problem and the two key points of accuracy and cost, on the basis of a large number of previous studies, researchers from Ocean One proposed progressive simulation and zonal simulation methods of coastal wetland soil factors, and carried out research work with typical coastal wetlands in China as a demonstration area.
The progressive simulation method is designed to improve the accuracy of the simulation. Based on the correlation between different soil factors in coastal wetlands, based on the correlation between different soil factors in the coastal wetlands, and the simulation results of one soil factor as the predictor of another soil factor, three levels (levels 1–3) of soil carbon and nitrogen storage spatial simulation were carried out in turn. The results show that compared with the non-progressive simulation (level 1), the simulation accuracy of soil organic carbon and total nitrogen in the progressive simulation (level 3) results is improved by 54.35% and 57.24%, respectively, which effectively improves the simulation accuracy of soil factors in coastal wetlands. It is proposed that the high correlation between different soil factors and between different depths or different periods of the same soil factor is a prerequisite for the development of progressive simulations.
The above papers are the first batch of sci-signed papers approved by the Key Laboratory of Coastal Zone Science and Integrated Management of the Ministry of Natural Resources, which has been funded by the National Natural Science Foundation of China and the Shuxing North Young Scholars Fund of the Ocean University. The research results can be applied to land spatial planning, natural resources survey and monitoring, coastal wetland survey, blue carbon sink accounting and trading, etc.