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首页> 外文会议>International Conference on Emerging Air Issues for the 21st Century: The Need for Multidisciplinary Management September 22-24, 1997 Calgary, Alberta, Canada >Greenhouse Gases and Global Budgets: Status of Sources and Sinks
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Greenhouse Gases and Global Budgets: Status of Sources and Sinks

机译：温室气体与全球预算：源和汇的状态

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摘要

Atmospheric concentrations of greenhouse gases have risen dramatically over the past century, resulting in a change in atmospheric composition that appears to be unprecedented in human history. However, while the sources of some greenhouse gases are primarily anthropogenic, key gases such as carbon dioxide, methane and nitrous oxide also have significant natural sources and sinks that are difficult to quantify. Furthermore, processes that govern their fluxes between major reservoirs may change with time in response to global change. Hence the estimation of both current and future fluxes of greenhouse gases is a major challenge to the science community. The paper summarizes the progress in understanding and modelling these fluxes, and provides latest estiamtes on the nature and magnitudes of the related sources and sinks. The summary includes estiamtes for aerosol fluxes, which add an important additional radiative forcing within the climate system Finally, the paper presents best estimates on the relative radiative effect on the global climate system of past human contributions to changes in atmospheric concentrations of these greenhouse gases and aerosols.
机译：在过去的一个世纪中，大气中温室气体的浓度急剧上升，导致大气成分发生变化，这在人类历史上似乎是前所未有的。但是，尽管某些温室气体的来源主要是人为的，但关键气体（例如二氧化碳，甲烷和一氧化二氮）也有大量的自然来源和汇，难以量化。此外，响应全球变化，控制主要储层之间通量的过程可能会随时间变化。因此，对当前和未来温室气体通量的估计是科学界面临的重大挑战。本文总结了对这些通量的理解和建模的进展，并提供了有关相关源和汇的性质和大小的最新估计。该摘要包括气溶胶通量的估计值，这些估计值在气候系统内增加了重要的附加辐射强迫。最后，本文对过去人类对这些温室气体的大气浓度变化的贡献对全球气候系统的相对辐射影响进行了最佳估计。气溶胶。

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