Inter-Monthly Variations in CO2 and CH4 Fluxes in a Temperate Forest: Coupling Dynamics and Environmental Drivers
文献类型：期刊论文
| 作者 | Guo, Chuying1,2,3,4; Ke, Fuxi3; Zhang, Leiming1,4; Li, Shenggong1,4 |
| 刊名 | ATMOSPHERE
 |
| 出版日期 | 2025-11-24 |
| 卷号 | 16期号:12页码:1326 |
| 关键词 | soil respiration methane uptake diurnal variation sampling optimization coupling relationship soil temperature soil volumetric water content |
| DOI | 10.3390/atmos16121326 |
| 产权排序 | 2 |
| 文献子类 | Article |
| 英文摘要 | Climate change, driven largely by anthropogenic greenhouse gas emissions, is a major global issue. Long-term high-frequency measurements of gas fluxes remain limited, especially outside the growing season. This study addresses two key gaps: the absence of continuous annual data capturing diurnal and seasonal variations, and the biases from suboptimal sampling timing. Using automated chambers, we monitored soil CO2 and CH4 fluxes throughout 2016 in a temperate forest on Changbai Mountain, China. Our results showed a strong negative correlation between annual CO2 and CH4 fluxes, with a slope of -0.21 and R2 of 0.70. This relationship persisted from March to November but was absent during the winter and April. Both gases exhibited the largest diurnal variations in summer. Statistical analysis identified 16:00 as the optimal single sampling time for estimating daily mean fluxes in most months. CO2 fluxes were primarily governed by temperature but modulated by VWC (soil volumetric water content). They were suppressed during summer drought and enhanced during winter freeze-thaw cycles. CH4 uptake rates were strongly dependent on VWC throughout the growing season, while their temperature response underwent a reversal from positive in summer to negative in winter. Decision tree analysis revealed nonlinear threshold responses. CO2 fluxes exhibited three temperature thresholds between 5.30 and 15.64 degrees C and two VWC thresholds between 0.30 and 0.42 m3 m-3. CH4 fluxes showed five temperature thresholds ranging from 2.34 to 15.71 degrees C and seven VWC thresholds from 0.11 to 0.44 m3 m-3. The strongest anticorrelation between CH4 flux and temperature occurred at intermediate VWC levels. This study provides detailed characteristics of greenhouse gas fluxes based on complete annual high-frequency data. It emphasizes the importance of year-round monitoring and offers improved sampling strategies and mechanistic insights for better flux monitoring and climate prediction. |
| URL标识 | 查看原文 |
| WOS关键词 | GREENHOUSE-GAS EMISSIONS ; SOIL CO2 ; DIURNAL-VARIATION ; METHANE UPTAKE ; N2O FLUXES ; RESPIRATION ; PRECIPITATION ; MOISTURE ; EFFLUX ; SYSTEM |
| WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:001646021600001 |
| 出版者 | MDPI |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219479]  |
| 专题 | 生态系统网络观测与模拟院重点实验室_外文论文 |
| 通讯作者 | Zhang, Leiming |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 2.Xiamen Univ, Coll Environm & Ecol, Xiamen 361102, Peoples R China; 3.Xiamen Environm Monitoring Stn, Xiamen 361021, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Guo, Chuying,Ke, Fuxi,Zhang, Leiming,et al. Inter-Monthly Variations in CO2 and CH4 Fluxes in a Temperate Forest: Coupling Dynamics and Environmental Drivers[J]. ATMOSPHERE,2025,16(12):1326. |
| APA | Guo, Chuying,Ke, Fuxi,Zhang, Leiming,&Li, Shenggong.(2025).Inter-Monthly Variations in CO2 and CH4 Fluxes in a Temperate Forest: Coupling Dynamics and Environmental Drivers.ATMOSPHERE,16(12),1326. |
| MLA | Guo, Chuying,et al."Inter-Monthly Variations in CO2 and CH4 Fluxes in a Temperate Forest: Coupling Dynamics and Environmental Drivers".ATMOSPHERE 16.12(2025):1326. |
入库方式： OAI收割
来源：地理科学与资源研究所
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