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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Radiative forcings and global warming potentials of 39 greenhouse gases
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Radiative forcings and global warming potentials of 39 greenhouse gases

机译：39种温室气体的辐射强迫和全球变暖潜能

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The radiative forcings and global warming potentials for 39 greenhouse gases are evaluated using narrowband and broadband radiative transfer models. Unlike many previous studies, latitudinal and seasonal variations are considered explicitly, using distributions of major greenhouse gases from a combination of chemical-transport model results and Upper Atmosphere Research Satellite (UARS) measurements and cloud statistics from the International Satellite Cloud Climatology Project. The gases examined include CO2, CH4, N2O, plus a number of chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, hydrochlorocarbons, bromocarbons, iodocarbons, and perfluorocarbons (PFCs). The model calculations are performed on a 5 degrees latitude grid from 82.5 degrees S to 82.5 degrees N. The radiative forcings determined by the model are then used to derive global warming potential for each of the compounds, which are compared with prior analyses. In addition, the latitudinal and seasonal dependence of radiative forcing since preindustrial time is calculated. The vertical profiles of the gases are found to be important in determining the radiative forcings; the use of height-independent vertical distributions of greenhouse gases, as used in many previous studies, produce errors of several percent in estimated radiative forcings for gases studied here; the errors for the short-lived compounds are relatively higher. Errors in evaluated radiative forcings caused by neglecting both the seasonal and the latitudinal distributions of greenhouse gases and atmospheres are generally smaller than those due to height-independent vertical distributions. Our total radiative forcing due to increase ill major greenhouse gas concentrations for the period 1765-1992 is 2.32 Wm(-2), only 2% higher than other recent estimates; however, the differences for individual gases are as large as 23%. [References: 45]
机译：使用窄带和宽带辐射传输模型评估了39种温室气体的辐射强迫和全球变暖潜能。与以前的许多研究不同，使用化学运输模型结果和国际卫星云气候学项目的高层大气研究卫星（UARS）测量值和云统计数据的组合，可以明确地考虑纬度和季节变化。检查的气体包括CO2，CH4，N2O，以及许多氯氟烃，氢氯氟烃，氢氟烃，氢氯烃，溴烃，碘碳和全氟化碳（PFC）。在从82.5度S到82.5度N的5度纬度网格上执行模型计算。然后将由模型确定的辐射强迫用于得出每种化合物的全球变暖潜能，并将其与先前的分析进行比较。此外，还计算了自工业化以来的辐射强迫的纬度和季节依赖性。发现气体的垂直分布对确定辐射强迫很重要。如先前的许多研究中所使用的，使用与高度无关的温室气体垂直分布会在此处研究的气体的估计辐射强迫中产生百分之几的误差;短寿命化合物的误差相对较高。忽略温室气体和大气的季节和纬度分布而引起的评估辐射强迫误差通常小于与高度无关的垂直分布所引起的误差。 1765年至1992年期间，由于主要有害温室气体浓度增加而导致的总辐射强迫为2.32 Wm（-2），仅比最近的其他估计高2％。但是，每种气体的差异高达23％。 [参考：45]

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