热带层臭氧作为大气污染物和在第三极的短暂气候变化因素
B R Sharma1, J Kuttippurath2, G S Gopikrishnan2
1CORAL, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India; Department of Physics, Prithvinarayan Campus, Tribhuvan University, Pokhara, Nepal.
Chemosphere
|May 13, 2025
概括
热带层臭氧在第三极地区正在增加,影响气候,并可能损害健康和生态系统. 这种臭氧增加有助于变暖和辐射强迫,最近的趋势与污染增加有关.
科学领域:
- 大气化学和物理大气化学和物理
- 气候科学 气候科学
- 环境科学 环境科学
背景情况:
- 第三极 (TP) 是一个巨大的,生态脆弱的地区,对亚洲的淡水资源至关重要.
- 过去二十年来,TP地区人为活动的增加导致了环境退化.
- 热带层臭氧作为温室气体和氧化剂,对温度,人类健康和生态系统产生影响.
研究的目的:
- 为了研究 TP 中的热层柱臭氧 (TPO) 的时空特征和长期趋势.
- 评估TPO对气候的影响,包括辐射强迫 (RF) 和温度变化.
- 了解最近人类活动对TPO及其影响的影响.
主要方法:
- 利用微波肢体探测器 (MLS) 和臭氧监测仪器 (OMI) 在2005-2020年期间的卫星测量结果.
- 分析了TPO的时空模式,年度趋势和季节性变化.
- 在TP热层中计算了辐射强迫和相关的温度变化.
主要成果:
- 在南方和东方TP中观察到高年平均TPO (35-40 DU),在内 TP (20-30 DU) 中观察到较低的值.
- 检测到整个TP的TPO显著增加,特别是在北方 (0.3 DU yr-1) 和夏季的东南地区 (高达0.35 DU yr-1).
- 发现TPO的增加有助于辐射强迫高达0.3Wm-2和升温高达0.4°C,在2014-2019年间观察到加速升温.
结论:
- 越来越多的TPO在TP是一个显著的趋势,具有相当大的气候影响.
- 观察到的变暖趋势在近年来得到了放大,这表明与人为污染有很强的联系.
- 热层臭氧的增加对第三极地区的公共健康,生态系统和整体气候构成风险.
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