| 来源类型 | Book Section |
| DOI | 10.1553/aar14s173 |
| Volume 1 Chapter 2: Emissions and concentrations of radiatively active atmospheric trace constituents. | |
| Winiwarter W; (APCC), Austrian Panel on Climate Change | |
| 发表日期 | 2014 |
| 出处 | Austrian Assessment Report 2014 (AAR14). Eds. (APCC), Austrian Panel on Climate Change , Vienna: Austrian Academy of Sciences Press. DOI: 10.1553/aar14s173 . |
| 出版年 | 2014 |
| 语种 | 英语 |
| 摘要 | Radiatively active atmospheric trace constituents consist of the following groups of compounds: long-lived greenhouse gases with residence times of years, subject to international conventions; short-lived gases formed in the atmosphere from precursor compounds, remaining in the atmosphere for hours or days: notably ozone; and aerosols, that is, airborne particles interacting with short-wave radiation with both direct and indirect effects. The "direct effect" covers scattering or absorption of light, while the "indirect effect" describes the particles. contribution to cloud formation and their resulting influence on reflecting sunlight. This chapter covers these quite diverse compounds with respect to their relevance for Austria. The Austrian national greenhouse gas inventory demonstrates the importance of the energy sector for emissions of the long-lived greenhouse gases. Out of the total emissions, 79% are considered energy related (of which about one third is due to road transport, and a quarter describes energy use from industry), 13% are derived from industrial processes, and 9% from agriculture. Carbon uptake in forest biomass represents a sink of a few percentage points of total emissions. Variations of emissions have occurred since 1990, but no trends are seen for most sectors. A strong increase in transport emissions and a simultaneous decline of the forest sink at the same time has resulted in an overall increase of the Austrian greenhouse gas emissions of 19% over the last 20 years. Variations in Austrian emissions do not notably affect the results of measurements at Sonnblick Observatory, where concentrations of the greenhouse gases carbon dioxide and methane reflect the global situation. A relationship between emissions and concentrations only becomes evident for short-lived compounds. Reducing the emissions of precursors helped decrease ozone concentrations while the regional background has remained constant. Furthermore, the emissions and concentrations of particles have decreased slightly over time, which in general are considered to "cool" the climate. Such a trend -- at least over the past 20 years -- is not apparent for black carbon (soot), a compound considered to enhance climate warming effects. Austrian research helps identify the impact of aerosols on climate -- an impact generally considered as important as that of the long-lived greenhouse gases, but far too little is known on a global scale. |
| 主题 | Mitigation of Air Pollution (MAG) ; Air Quality & ; Greenhouse Gases (AIR) |
| URL | http://pure.iiasa.ac.at/id/eprint/11088/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/134335 |
| 推荐引用方式 GB/T 7714 | Winiwarter W. Volume 1 Chapter 2: Emissions and concentrations of radiatively active atmospheric trace constituents.. 2014. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Emissions%20and%20co（729KB） | 智库出版物 | 限制开放 | CC BY-NC-SA | 浏览 | ||
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