Aircraft observations since the 1990s reveal increases of tropospheric ozone at multiple locations across the Northern Hemisphere
Aircraft observations since the 1990s reveal increases of tropospheric ozone at multiple locations across the Northern Hemisphere
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DOI：
10.1126/sciadv.aba8272
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发表时间：
2020-08-01
期刊：
影响因子：
13.6
通讯作者：
Granier, Claire
中科院分区：
文献类型：
--
作者：
Gaudel, Audrey;Cooper, Owen R.;Granier, Claire
对流层臭氧是一种重要的温室气体，对人类健康、作物和生态系统的生产力有害，并控制着对流层的氧化能力。由于其高度的空间和时间变异性以及有限的观测，不可能在20年的时间尺度上量化整个北方半球对流层臭氧的净变化。在这里，我们表明，使用新的广泛的商用飞机监测网络的观测结果，对流层臭氧增加以上11个地区的北方半球自20世纪90年代中期以来，与OMI/MLS卫星产品。转移人为臭氧前体排放的净结果导致臭氧及其辐射强迫增加以上所有11个研究区域的北方半球，尽管氮氧化物排放减少中纬度地区。
Tropospheric ozone is an important greenhouse gas, is detrimental to human health and crop and ecosystem productivity, and controls the oxidizing capacity of the troposphere. Because of its high spatial and temporal variability and limited observations, quantifying net tropospheric ozone changes across the Northern Hemisphere on time scales of two decades had not been possible. Here, we show, using newly available observations from an extensive commercial aircraft monitoring network, that tropospheric ozone has increased above 11 regions of the Northern Hemisphere since the mid-1990s, consistent with the OMI/MLS satellite product. The net result of shifting anthropogenic ozone precursor emissions has led to an increase of ozone and its radiative forcing above all 11 study regions of the Northern Hemisphere, despite NOx emission reductions at midlatitudes.