在热带和中度下层平流层之间量化运输
1C. M. Volk, G. S. Dutton, and J. M. Gilligan are with the Climate Monitoring and Diagnostics Laboratory (CMDL), National Oceanic and Atmospheric Administration (NOAA), Boulder, CO 80303, and the Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO 80309, USA. J. W. Elkins is with NOAA/CMDL, Boulder, CO 80303, USA. D. W. Fahey is with the NOAA Aeronomy Laboratory, Boulder, CO 80303, USA. R. J. Salawitch and J. J. Margitan are with the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA. M. H. Proffitt is with the NOAA Aeronomy Laboratory, Boulder, CO 80303, and CIRES, University of Colorado, Boulder, CO 80309, USA. M. Loewenstein, J. R. Podolske, and K. R. Chan are with the NASA Ames Research Center, Moffett Field, CA 94035, USA. K. Minschwaner is with the Department of Physics, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA.
中度空气进入热带平流层的速度比预期的要慢,使中度臭氧对工业更敏感. 这一发现影响了臭氧损耗和超音速飞机排放的预测.
科学领域:
- 大气化学 大气化学
- 石流层科学 石流层科学
- 全球交通运输全球运输
背景情况:
- 平流层的组成受到中度和热带之间的空气交换的影响.
- 对这种交换进行准确的建模对于理解臭氧层动态和大气污染至关重要.
研究的目的:
- 量化中度和热带低层平流层之间的空气质量交换率.
- 评估这种汇率对臭氧对工业的敏感性和超音速飞机潜在影响的影响.
主要方法:
- 在空中进行长寿命分子 (甲,氧化,臭氧等) 的现场观测. ) 的情况.
- 利用热带追踪模型分析大气运输路径和时间尺度.
主要成果:
- 中度空气进入热带较低层平流层发生在大约13.5个月内.
- 从热带到中度的平流层运输比反向更快.
- 在热带上升地区21公里处,大约45%的空气来自中度.
结论:
- 全球光化学模型可能低估了中度臭氧对工业的敏感性,因为热带交换速度比假设慢.
- 超音速飞机的排放可能会到达中层平流层,因为观察到的中度空气贡献.
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