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首页> 外文期刊>Geophysical Research Letters >Does the location of aircraft nitrogen oxide emissions affecttheir climate impact?
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Does the location of aircraft nitrogen oxide emissions affecttheir climate impact?

机译:飞机氮氧化物排放的位置是否影响其气候影响?

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摘要

We present results from 112 one-year global chemistry-transport model integrations:a base case,then variants withextra aircraft nitrogen oxide(NO,,)emissions added tospecific regions in the first month (July).The NOxstimulates ozone(03)production and methane(CH4)destruction.Responses vary spatially:low backgroundNOx regions are most sensitive.Integrated(100-year timehorizon)radiative forcings(IRF)are calculated.Net(O3 +CH4)IRFs for July aviation NO,,are generally negative:the global average,weighted by emissions,is-1.9 mWm-2yr (TgNO2)-1.The positive IRF associated with the short-term O3 increase (4.1 mWm-2 yr(TgNO2)-1)isoverwhelmed by the effects of the long-term CH4 decrease.Aircraft NOx net IRFs are spatially variable,with July valuesover the remote Pacific approximately balancing the IRFassociated with aviation CO2 emissions(28 mWm-2 yr(TgNO2)-1).The overall climate impact of global aviationis often represented by a simple multiplier for CO2emissions.These results show that this is inappropriate.
机译:我们展示了来自112个为期一年的全球化学运输模型集成的结果:一个基本案例,然后在第一个月(7月)向特定区域添加了额外飞机氮氧化物(NO,)排放的变体。NOx刺激了臭氧(03)的产生和甲烷(CH4)的破坏。响应在空间上变化:低背景NOx区域最敏感。计算了综合(100年时间)辐射强迫(IRF).7月航空NO的净(O3 + CH4)IRF通常为负值:由排放量加权的全球平均值为1.9 mWm-2yr(TgNO2)-1。长期O3的短期影响(与短期O3升高相关的正IRF(4.1 mWm-2 yr(TgNO2)-1)淹没了)。航空器NOx净IRFs在空间上是可变的,偏远太平洋地区的7月值大致平衡了与航空CO2排放相关的IRF(28 mWm-2 yr(TgNO2)-1)。全球航空的总体气候影响通常由简单的二氧化碳排放乘数。这些结果表明这是不当。

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