A Review of Influence of Warming and Precipitation Changes on Soil CO2 Release
Global warming is expanding the frequency,scope,duration,and severity of severe drought and heavy rainfall events.Extreme climate events such as high temperatures,droughts,and heavy rainfall have significantly changed the rate and intensity of soil organic carbon mineralization and inorganic carbon release.The release of soil CO2,as an important component of the carbon cycle in terrestrial ecosystems,is highly sensitive to climate change.Exploring the relationship and response mechanism between soil CO2 release and climate change can provide theoretical support for in-depth understanding of soil carbon cycling and source sink mechanisms in the context of global warming.In this paper systematically it analyzes the previous studies on the effects of warming and precipitation changes on soil respiration(Rs)and soil carbonate mineral dissolution,and analyzed the impact of warming and precipitation changes on soil CO2 release from the aspects of Rs and soil carbonate mineral dissolution.In the future,efforts should be done to strengthen research on the coupling effects of climate change and other factors such as soil properties,nutrient content and availability,and microbial biomass and activity on Rs.Constructing an Rs rate model with multivariate factor coupling under extreme climate conditions.Deeply explore the response thresholds of Rs and carbonate mineral dissolution in carbonate bedrock soil areas to extreme heavy precipitation events.Accurately quantify the carbon migration and transformation flux between Rs and carbonate mineral dissolution under extreme heavy rainfall conditions.
warmingprecipitation changesoil CO2soil respirationcarbonate mineral dissolutionenvironmental geology
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