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A group of Chinese researchers issued a data map of the soil organic carbon (SOC) content for global black soil areas, 【小题1】 (reveal) the quantification of agroecosystems and global food security, according to the recent issue of the journal Remote Sensing of Environment.
Research has shown that carbon cycle is 【小题2】 (significant) influenced by agricultural soils. The accuracy mapping of SOC content can help to clarify the carbon sequestration capacity (碳汇能力), quantify agroecosystem and contribute 【小题3】global food security. But it is still challenging to acquire 【小题4】 (rely) SOC content databasets.
The study 【小题5】 (publish) in the journal was done by researchers from the Northeast Institute of Geography and Agroecology under the Chinese Academy of Sciences. According to the journal, the researchers 【小题6】 (collect) more than 191,000 scenes of remote sensing images and elevation model data, and used meta-learning convolutional neural network model 【小题7】 (generate) high-resolution data map for global black soil regions.
The data in the study indicates that the SOC content in the global black soil regions shows a decreasung trend, which can be divided into the significant decrease phase from 1984 to 2000, 【小题8】 the moderate decrease phase from 2001 to 2021.
The result from the study also shows that the four major black soil 【小题9】 (region) in the world have different rates of SOC decline. The SOC decline rates of the Russian-Ukrainian Plain and the Pampas Plain of South America are higher than 【小题10】 of the northeast China and the Mississippi River Basin in North America.
