Visible Spectroscopy at McMurdo Station, Antarctica

南极洲麦克默多站的可见光谱

• 批准号: 8713781
• 负责人: Susan Solomon
• 金额: --
• 依托单位: NOAA Environmental Technology Laboratory
• 依托单位国家: 美国
• 项目类别: Interagency Agreement
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-06-01 至 1988-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8713781&HistoricalAwards=false
• 关键词: Visible; Spectroscopy; McMurdo; Station; Antarctica

The total ozone abundance over Antarctica has decreased dramatically during the austral spring seasons of the past decade. Total ozone abundances observed in October, 1986 were only about half as large as those obtained in the late 1960's and early 1970's. Ozone plays an essential role in the Earth's ecology because of its absorption of ultraviolet radiation. A great deal of recent research has been directed towards understanding the cause of the change in the Antarctic ozone layer. Ground-based visible absorption spectroscopy will be used to measure the stratospheric column abundances of ozone, nitrogen dioxide (NO2) and clorine dioxide (OClO). This will provide a means of simultaneously measuring the ozone change and the abundances of both reactive nitrogen and reactive chlorine species. Possible correlations between simultaneous measurements of the three constituents are of particular value in distinguishing between proposed mechanisms of the ozone depletion. Such measurements can be carried out by using the direct light from the sun or moon (thus providing information on the diurnal variations of these species) or by measuring the scattered light from the zenith sky. The planned research consists of an extended series of visible absorption measurements at McMurdo Station during August, September, and October, 1987.

南极上空的臭氧总量急剧减少 在过去十年的南方春季， 臭氧总量 1986年10月观察到的丰度仅为1986年10月的一半左右 60年代末和70年代初获得的。 臭氧层扮演一个 在地球生态中起着重要作用，因为它吸收了 紫外线辐射 最近的大量研究表明， 目的是为了了解变化的原因， 南极臭氧层。 地基可见吸收光谱 将用于测量平流层臭氧柱丰度， 二氧化氮（NO2）和二氧化氯（OClO）。 这将提供一个 同时测量臭氧的变化和 活性氮和活性氯物质。 可能 三个同时测量之间的相关性 成分在区分以下方面具有特殊价值： 臭氧消耗的机制。 这种测量可以是 利用太阳或月亮的直射光进行（因此 提供有关这些物种的日变化的资料）或 通过测量天顶的散射光 计划 研究包括一系列的可见光吸收 八月、九月和十月在麦默多站进行的测量， 1987.