Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions/School of Geographical Sciences, Harbin Normal University, Harbin, 150025, China.
Heilongjiang Province Collaborative Innovation Center of Cold Region Ecological Safety, Harbin, 150025, China.
Environ Sci Pollut Res Int. 2024 Apr;31(20):29610-29630. doi: 10.1007/s11356-024-33149-5. Epub 2024 Apr 6.
The emission reduction of atmospheric pollutants during the COVID-19 caused the change in aerosol concentration. However, there is a lack of research on the impact of changes in aerosol concentration on carbon sequestration potential. To reveal the impact mechanism of aerosols on rice carbon sequestration, the spatial differentiation characteristics of aerosol optical depth (AOD), gross primary productivity (GPP), net primary productivity (NPP), leaf area index (LAI), fraction of absorbed photosynthetically active radiation (FPAR), and meteorological factors were compared in the Sanjiang Plain. Pearson correlation analysis and geographic detector were used to analyze the main driving factors affecting the spatial heterogeneity of GPP and NPP. The study showed that the spatial distribution pattern of AOD in the rice-growing area during the epidemic was gradually decreasing from northeast to southwest with an overall decrease of 29.76%. Under the synergistic effect of multiple driving factors, both GPP and NPP increased by more than 5.0%, and the carbon sequestration capacity was improved. LAI and FPAR were the main driving factors for the spatial differentiation of rice GPP and NPP during the epidemic, followed by potential evapotranspiration and AOD. All interaction detection results showed a double-factor enhancement, which indicated that the effects of atmospheric environmental changes on rice primary productivity were the synergistic effect result of multiple factors, and AOD was the key factor that indirectly affected rice primary productivity. The synergistic effects between aerosol-radiation-meteorological factor-rice primary productivity in a typical temperate monsoon climate zone suitable for rice growth were studied, and the effects of changes in aerosol concentration on carbon sequestration potential were analyzed. The study can provide important references for the assessment of carbon sequestration potential in this climate zone.
大气污染物减排导致 COVID-19 期间气溶胶浓度发生变化。然而，关于气溶胶浓度变化对碳固存潜力的影响研究还很缺乏。为揭示气溶胶对水稻碳固存的影响机制，比较了三江平原气溶胶光学厚度（AOD）、总初级生产力（GPP）、净初级生产力（NPP）、叶面积指数（LAI）、光合有效辐射吸收分数（FPAR）和气象因子的空间分异特征。采用 Pearson 相关分析和地理探测器分析了影响 GPP 和 NPP 空间异质性的主要驱动因素。结果表明，疫情期间水稻种植区 AOD 的空间分布格局呈由东北向西南逐渐降低的趋势，整体降低了 29.76%。在多种驱动因素的协同作用下，GPP 和 NPP 均增加了 5.0%以上，碳固存能力得到提高。LAI 和 FPAR 是疫情期间水稻 GPP 和 NPP 空间分异的主要驱动因素，其次是潜在蒸散量和 AOD。所有交互检测结果均表现出双因子增强，表明大气环境变化对水稻初级生产力的影响是多因素协同作用的结果，AOD 是间接影响水稻初级生产力的关键因素。研究了典型温带季风气候区适合水稻生长的气溶胶-辐射-气象因子-水稻初级生产力协同作用，并分析了气溶胶浓度变化对碳固存潜力的影响。研究可为评估该气候区的碳固存潜力提供重要参考。
