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Greenhouse Gases and Global Budgets: Status of Sources and Sinks

机译:温室气体和全球预算:来源和水槽的地位

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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:在过去的世纪中,温室气体的大气浓度急剧上升,导致大气组合物的变化似乎在人类历史中前所未有。然而,虽然一些温室气体的来源主要是人类学,但是,诸如二氧化碳,甲烷和氧化亚乙烷的关键气体也具有显着的天然来源和难以量化的水槽。此外,管理主要水库之间的流程可能随着全球变化而随时间而变化。因此,对温室气体的目前和未来助势的估算是对科学界的主要挑战。本文总结了了解和建模这些势态的进展,并为相关来源和水槽的性质和大幅度提供了最新的estiamtes。摘要包括最终在气候系统内增加了气溶胶势态的estiamtes,最终在气候系统中增加了最重要的辐射,这提出了关于对过去人类贡献全球气候系统的相对辐射效应,以对这些温室气体的大气浓度的变化相对辐射效果气溶胶。

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