气溶揭露增加了南亚地区的气候变暖
H R C R Nair1, Krishnakant Budhavant2,3, M R Manoj1,3
1Department of Environmental Science and the Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden.
概括
随着COVID-19大流行,气溶显著掩盖了由温室气体 (GHG) 引起的变暖. 在此期间减少的排放表明,气溶揭露几乎抵消了南亚的二氧化碳强迫.
科学领域:
- 大气科学 大气科学
- 气候科学 气候科学
- 环境科学 环境科学
背景情况:
- 人为气溶抵消了温室气体 (GHG) 引起的变暖,但对这种掩盖效应的估计存在很大的不确定性.
- 观测约束对于准确量化气溶掩盖至关重要.
- 随着COVID-19的流行,人类排放量出现了独特的,尽管只是暂时的减少.
研究的目的:
- 用COVID-19社会放缓期间的排放减少来量化南亚地区的气溶掩盖效应.
- 评估减少气溶载荷对太阳辐射和大气加热的影响.
- 了解气溶揭露对未来气候变化缓解战略的影响.
主要方法:
- 在COVID-19大流行引起的排放减少期间,对大气数据和卫星观测的分析.
- 测量气溶载荷,表面的太阳辐射和大气温度变化.
- 辐射强迫和气溶揭露幅度的计算.
主要成果:
- 在COVID-19放缓期间,在南亚地区观察到气溶载荷的大幅下降.
- 气溶揭露约占该地区二氧化碳诱导的辐射强迫的四分之三.
- 表面太阳辐射 (表面亮化) 增加了~7%,气溶引起的大气加热的减少 (~0.4 Kd-1) 被记录下来.
- 南亚上空的人类气溶在晴朗的天空下 (三月至五月) 导致大气加热约1.4W m-2.
结论:
- 该研究量化了人为气溶在南亚的显著掩盖效应.
- 预计随着向零排放能源的过渡,气溶将迅速揭露,而温室气体仍然存在.
- 这突出了气溶排放变化的复杂和潜在的快速气候反应.
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