对比生物基异二烯排放对温度驱动的拉尼娜和厄尔尼诺的反应:基于HCHO的全球逆转的见解
Hui Li1,2, Philippe Ciais1, Pramod Kumar1
1Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette F-91191, France.
Environmental science & technology
|January 19, 2026
概括
使用卫星数据和运输模型估计了全球生物性异烯排放 (456 ± 249 TgC yr-1). 排放密切跟踪陆地表面温度,异常是由气候模式和极端变暖事件驱动的.
科学领域:
- 大气化学和生物地球化学循环
- 气候科学和气候模型
- 遥感和地球观测 遥感和地球观测
背景情况:
- 异烯是影响空气质量,甲寿命和二次有机气溶形成的关键大气挥发性有机化合物.
- 精确监测生物源性异二烯排放对于理解生物圈与大气之间的相互作用至关重要,尤其是在不断变化的气候条件下.
- 现有的排放清单往往缺乏捕捉气候驱动变化的时间和空间分辨率.
研究的目的:
- 开发和应用基于回归的反转框架,用于估计2019年至2024年全球每月生物性异二烯排放量.
- 将TROPOSpheric监测仪器 (TROPOMI) 的卫星衍生的甲 (HCHO) 柱与LMDZ-INCA大气运输模型集成.
- 分析异构二烯排放异常的驱动因素,特别是与陆地表面温度和气候振荡 (如厄尔尼诺和拉尼娜) 相关的因素.
主要方法:
- 基于回归的反转框架被用于估计生物源异二烯排放.
- 该框架将TROPOMI HCHO柱作为异烯的替代品与LMDZ-INCA大气传输模型集成在一起.
- 进行了归因分析,以确定观察到的排放异常的主要驱动因素,重点关注表面温度变化.
主要成果:
- 在2019年至2024年期间,全球生物性异烯年平均排放量估计为456 ± 249 TgC yr-1 .
- 异烯排放量在2022年呈现最低,在2024年达到峰值,与全球年度陆地表面温度 (R = 0.95) 密切相关.
- 排放异常在热带地区最为显著,并受到拉尼娜,厄尔尼诺和北半球变暖事件的强烈影响.
结论:
- 表面温度被证实是生物源性异二烯排放异常的主要驱动因素,在高度北方地区的敏感性增加.
- 更新的排放数据集改善了空间协议,并减少了大气模型模拟中的偏差与独立观测的差异.
- 这项研究提供了第一个HCHO受限制的全球异二烯排放数据集,直到2024年,这对空气质量,氧化剂预算和气候反研究有价值.
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