Seasonality in soil temperature may drive the seasonal dynamics of carbonate?derived CO 2 efflux in a calcareous soil

Carbonates in soils may act as a potential source of CO? efflux from calcareous to the atmosphere. However, its seasonal dynamics and relationships with soil temperature or moisture are not well?understood. A 5?yr warming experiment was performed evaluate effects symmetric (all season) asymmetric (seasonal) on organic fraction (SOC)?derived carbonate?derived (partitioned by ?¹³C signature) karst region southwest China. In where precipitation mostly falls during summer, an average 2.0°C under both scenarios produced 6–34% 11–14% increases SOC?derived efflux, respectively. The scenario 1.6 times that scenarios, but no changes were found for efflux. positively correlated moisture, suggesting entailment biotic processes. contrast, temperature, poorly moisture. Thus, likely driven abiotic