温室气体吸收带重叠对CO2红外辐射效应的影响
Xu Na, Shi Guangyu, Dai Tie, Yang Su. The Overlapping Effect of Greenhouse Gases Absorption Bands on CO2 Thermal Radiative Effect[J]. Climatic and Environmental Research, 2011, 16(4): 441-451. DOI: 10.3878/j.issn.1006-9585.2011.04.04
Citation: Xu Na, Shi Guangyu, Dai Tie, Yang Su. The Overlapping Effect of Greenhouse Gases Absorption Bands on CO2 Thermal Radiative Effect[J]. Climatic and Environmental Research, 2011, 16(4): 441-451. DOI: 10.3878/j.issn.1006-9585.2011.04.04徐娜, 石广玉2, 戴铁2, 杨溯3 1.
国家卫星气象中心中国遥感卫星辐射测量与定量重点开放实验室,北京 100081; 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京 100029
2.中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京 100029
3.国家气象信息中心,北京 100081
计量 文章访问数: 3757 HTML全文浏览量: 12 PDF下载量: 572 出版历程The Overlapping Effect of Greenhouse Gases Absorption Bands on CO2 Thermal Radiative Effect
摘要
摘要: 利用精确的逐线积分模式，研究了大气主要温室气体H2O、CO2、O3、N2O和CH4吸收带重叠对红外冷却率的影响。同时，通过CO2浓度加倍的敏感性试验，详细讨论了重叠效应对CO2辐射效应的影响。结果表明：气体吸收带重叠对大气红外辐射计算具有重要的影响。在这5种大气主要的吸收气体中，N2O和CH4的重叠效应对总冷却率影响很小，在实际应用中可以忽略两者的重叠作用，采用近似方法处理其贡献。重叠效应对CO2辐射效应影响的总趋势是减弱由于其浓度增加而导致的温室效应的增强，主要贡献来自于CO2 15 μm带的两翼，以及以960 cm-1和1064 cm-1为中心的次级弱吸收区。在垂直方向上，重叠效应主要表现在减弱了地表大气的增温强度，并使对流层大气由原来的冷却作用转变为增暖作用，而对平流层大气的影响很小。此外，由于大气H2O含量的变化，重叠效应还表现出明显的季节性和纬度变率。
Abstract: The effect of overlapping of atmospheric H2O, CO2, O3, N2O, and CH4 absorption bands on the total thermal cooling rates and the radiative perturbation due to the doubling CO2 abundance are investigated using an exact linebyline integration algorithm. It is found that the overlapping effect plays an important role on the calculation of thermal cooling rates. Among the five main infrared absorbers, the overlapping effect of N2O and CH4 can be neglected as their little contribution. The influence of overlapping effect on the CO2 thermal radiative is to decrease the enhanced greenhouse effect due to increased absorber announces which are mainly contributed by the 15 μm CO2 band wings and the secondary weaker bands centred at 960 cm-1 and 1064 cm-1. In vertical, overlapping effect has slight influence on the radiative perturbation in stratosphere, but plays a significant role in troposphere and surface. The net effect of the overlapping absorption is to transform the troposphere from cooling to warming, and to decrease the strength of surface warming caused by CO2 increase. Additionally, overlapping effect exhibits strong seasonal and latitudinal variations due primarily to changes in H2O concentration.
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相关知识
温室气体能吸收地表发出的（）辐射。
温室气体，是指大气中吸收和重新放出红外辐射的自然和人为的气态成分，包括
知新科普：温室气体之成因、来源及对环境的影响
温室气体主要有哪些
温室气体是指什么
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温室气体吸收长波还是短波
温室效应影响温室气体组分、危害及应对措施,大气科学论文
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