3 results about "Co2 flux" patented technology

This invention discloses a method and system for differentiating typhoon impacts based on seawater CO2 partial pressure data. The method includes: acquiring marine situation monitoring data during typhoon passage in the target sea area through a multi-source observation platform, constructing a standardized dataset and a climatological background field; using the DBSCAN clustering algorithm to segment water masses, and combining the Man-Whitney U test and correlation analysis to determine the distribution of characteristic typhoon water masses; calculating the seawater CO2 partial pressure anomaly field based on the climatological background field, constructing a typhoon impact index time series, identifying the core impact area, and generating typhoon impact trace paths; subsequently reconstructing seawater CO2 partial pressure grid points, and constructing a spatial map of typhoon impacts; finally, analyzing the spatiotemporal changes in air-sea CO2 flux, assessing carbon sink stability, and generating a typhoon-carbon sink sensitivity zoning map. Using seawater CO2 partial pressure as the core indicator, this method overcomes the limitations of traditional methods and provides reliable technical support for assessing the marine environmental impact of typhoons.

The invention relates to the technical field of adsorbents, in particular to a 13X molecular sieve adsorbent and a preparation method thereof. The preparation method comprises the following steps: firstly, performing lanthanum ion replacement treatment on 13X molecular sieve raw powder, then generating an MFI molecular sieve coating layer on the surface of the 13X molecular sieve raw powder, etching by using sodium hydroxide to prepare a mesoporous structure, and then performing hydrophobic modification treatment on the mesoporous structure, so that water molecules are difficult to adsorb by the molecular sieve raw powder and mesoporous surfaces thereof due to a methyl group on the surface, and the molecular sieve raw powder and the mesoporous surfaces are not easy to adsorb; hydrogen bond connection cannot be formed, so that a rapid'adsorption-diffusion 'transfer process cannot be realized in molecular sieve raw powder, the polarity of carbon dioxide is far smaller than that of water molecules, the carbon dioxide cannot be repelled by methyl, and the diffusion of the carbon dioxide in mesopores is far higher than that in micropores due to the existence of the mesopores. Therefore, the carbon dioxide flux in the molecular sieve raw powder is effectively improved, and the carbon dioxide adsorption rate of the molecular sieve raw powder is improved.

This invention relates to a method for estimating soil organic carbon sequestration by crop residue return to the field, comprising: acquiring and processing multi-source data; simulating the photosynthetic carbon assimilation and CO2 flux released by respiration of major cereal crops; extracting the net CO2 flux of MCCs (Mechanical Control Cells) in terrestrial ecosystems; calculating the net assimilated carbon allocation of each component of MCCs during their growth cycle; determining the distribution of biomass carbon in different straw management practices; and calculating the total soil organic carbon sequestration by MCC residue return to the field in all grid units based on the local soil organic carbon conversion rate. The beneficial effects of this invention are: by quantifying the allocation of net assimilated carbon to components such as rhizosphere deposition, crop roots and stubble, collectable straw, and grains, this invention provides crucial support for assessing the carbon cycle and soil organic carbon sequestration potential of farmland ecosystems.