在青海-西藏高原的变暖下,非生长季节更加强的甲交换
Zhenhai Liu1, Bin Chen2, Shaoqiang Wang3
1Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Coupling Process and Effect of Natural Resources Elements, Beijing, 100055, China.
The Science of the total environment
|January 29, 2024
概括
气候变暖对青海-西藏高原的甲 (CH4) 交换产生重大影响,特别是在非生长季节. 在寒冷的月份,这种更高的敏感性会改变区域CH4预算,影响气候变化预测.
科学领域:
- 环境科学 环境科学
- 气候科学 气候科学
- 生态生态学 生态生态学
背景情况:
- 青海-西藏高原 (QTP) 的永久土退化和变暖增加了甲 (CH4) 交换的不确定性.
- 在QTP湿地和草原中,CH4流量的季节性温度依赖性尚不清楚.
研究的目的:
- 为了研究CH4流的温度依赖的季节性模式.
- 量化全球变暖对QTP湿地和草原中CH4交换的影响.
主要方法:
- 分析了每天9745个CH4流量观测结果.
- 温度-CH4流量关系的回归拟合.
- 基于现场和基于模型的控制实验.
主要成果:
- 在非生长季节,CH4交换显示出比生长季节更强烈的变暖反应.
- 变暖加剧了湿地中的CH4排放和草原中的吸收.
- 与生长季节相比,非生长季节的反应强度是排放量的1.89倍,摄入量的4.80倍.
结论:
- 在非生长季节,QTP CH4交换表现出更高的变暖灵敏度,这些季节也经历了更快的变暖速度.
- 这些因素将显著改变区域CH4源/沉平衡.
- 忽视这些非生长季节的影响会导致不准确的气候变暖估计.
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