北极气溶的来源,可变性,长期趋势和辐射强迫:对北极放大影响
Jayanarayanan Kuttippurath1, Vikas Kumar Patel2, Raina Roy2
1CORAL, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India. jayan@coral.iitkgp.ac.in.
Environmental science and pollution research international
|December 3, 2023
概括
像黑碳这样的北极气溶驱动气候变化,导致北极雾和放大. 分析显示,气溶的趋势越来越大,特别是在亚洲和美洲,影响地区温度,并需要政策决策.
科学领域:
- 大气科学 大气科学
- 气候变化研究 气候变化研究
- 环境科学 环境科学
背景情况:
- 北极污染显著推动地区气候变化,导致北极雾和放大.
- 气溶,包括黑碳 (BC) 和灰尘,在这些现象中起着至关重要的作用.
研究的目的:
- 分析2003-2019年在北极地区的主要气溶 (AOD,BC,尘埃) 的趋势和空间分布.
- 确定主要的气溶来源及其对辐射强迫和气候影响的贡献.
主要方法:
- 利用地面,卫星和再分析数据来测量气溶光学深度 (AOD),黑碳 (BC) 和尘埃.
- 使用潜在来源贡献函数 (PSCF) 来识别气溶来源.
- 分析了季节性趋势和气溶辐射强迫的净值.
主要成果:
- 在格陵兰岛和北极中部发现的气溶度最低;在欧亚大陆北部和北美最高.
- 在美国西北部和亚洲北部,AOD和BC的显著积极趋势;在北极中部附近的负面尘埃趋势.
- 气溶在春季达到峰值,季节性地观察到夏季趋势的增加和春季趋势的下降.
- 主要来源被确定为欧洲,俄罗斯和北美,受人为和自然排放的影响.
- 在关键的北极地区观察到高净气溶辐射强迫 (2-4 W/m2),影响区域温度.
结论:
- 由区域排放驱动的北极气溶增加,通过辐射效应促进北极放大.
- 调查结果强调,需要采取政策干预措施,以减轻北极雾和扩大在这个脆弱的地区.
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