Using Fourier Transform Spectroscopy to Investigate Atmospheric Composition and its Changes

利用傅里叶变换光谱研究大气成分及其变化

• 批准号: 298391-2012
• 负责人: Walker, Kaley
• 金额: $ 3.35万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=571491
• 关键词: Using; Fourier; Transform; Spectroscopy; Investigate

The chemical composition of Earth's atmosphere is changing due to the influence of human activity. These changes are affecting, and will continue to affect, the quality of life on Earth. Two important and related changes, ozone depletion and climate change, have been identified internationally as two of the "grand challenges" for atmospheric science in this century. To address these grand challenges, my research group makes measurements from space and from the ground to study the chemical composition of the Earth's atmosphere and how it is changing with time. To further this research program, we will undertake the following projects over the next five years. 1) Fluorine-containing compounds, produced by industrial processes, are potent greenhouse gases that can contribute significantly to global warming. This study will use new data from a Canadian scientific satellite to examine how the amounts of these chemicals in the atmosphere are changing with time. These measurements will be compared with atmospheric models to see how well they can simulate the transportation of these greenhouse gases through the atmosphere. The results from this project will contribute to improving the model systems that are used to predict future changes in the Earth's atmosphere. 2) Long-term measurements are required to understand the changes occurring in our atmosphere. This project will build on past measurements of the high Arctic (80 N) atmosphere to create a ten-year long data set of the key chemicals involved in depletion of the ozone layer and in climate change. The measurements will be made during springtime, the time when ozone destruction is greatest. They will be used to investigate how instruments in space and on the ground "see" what is happening in the atmosphere. These results will be used to determine how a portable instrument can be best used in the Arctic to increase Canadian atmospheric measurement capabilities and to further our understanding of the changing ozone layer.

由于人类活动的影响，地球大气层的化学成分正在发生变化。 这些变化正在影响并将继续影响地球上的生活质量。国际上已将臭氧层破坏和气候变化这两个重要而相关的变化确定为本世纪大气科学面临的两大“重大挑战”。 为了应对这些巨大的挑战，我的研究小组从太空和地面进行测量，研究地球大气的化学成分及其随时间的变化。 为了进一步推进这项研究计划，我们将在未来五年内开展以下项目。 1)工业生产过程中产生的含氟化合物是一种强效温室气体，可显著导致全球变暖。 这项研究将利用加拿大科学卫星的新数据，研究这些化学品在大气中的含量如何随时间变化。 这些测量结果将与大气模型进行比较，以了解它们在多大程度上能够模拟这些温室气体在大气中的传输。 该项目的成果将有助于改进用于预测地球大气层未来变化的模型系统。 2)需要进行长期测量，以了解我们大气层中发生的变化。 该项目将以过去对北极高纬度（80 N）大气的测量为基础，建立一个长达十年的关于臭氧层消耗和气候变化所涉及的关键化学品的数据集。 测量将在春季进行，这是臭氧破坏最严重的时候。 它们将被用来研究空间和地面上的仪器如何“看到”大气层中发生的事情。 这些结果将用于确定如何在北极地区最好地使用便携式仪器，以提高加拿大的大气测量能力，并进一步了解臭氧层的变化。