NOx lifetimes and emissions of cities and power plants in polluted background estimated by satellite observations
NOx lifetimes and emissions of cities and power plants in polluted background estimated by satellite observations
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通过卫星观测估算污染背景下城市和发电厂的氮氧化物寿命和排放量
DOI：
10.5194/acp-16-5283-2016
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发表时间：
2016-01-01
影响因子：
6.3
通讯作者：
Wagner, Thomas
中科院分区：
文献类型：
--
作者：
Liu, Fei;Beirle, Steffen;Wagner, Thomas
我们提出了一种新的方法来量化NOx排放和相应的大气寿命，该方法来自OMI NO2观测数据以及ECMWF风场，而无需进一步输入位于污染背景中的源的模型。采用静风条件下NO2模式作为NOx排放的空间模式的代表，并通过在较大风速下测量的空间模式变化来确定有效的大气NOx寿命。排放随后来自背景上方的二氧化氮质量，并在感兴趣的源周围整合。对中国和美国非山区的17座发电厂和53座城市的寿命和排放量进行了估算。臭氧季节（5 - 9月）的寿命为3.8 aeu -+/- aeu -1.0 aeu -h（平均aeu -+/- aeu标准偏差），范围为1.8 - 7.5 aeu -h。得出的氮氧化物排放量总体上与电厂和城市自下而上的清单一致。与全球库存相比，中国城市的区域库存更符合自上而下的估计，这很可能是由于两份清单采用了不同的缩减方法。
We present a new method to quantify NOx emissions and corresponding atmospheric lifetimes from OMI NO2 observations together with ECMWF wind fields without further model input for sources located in a polluted background. NO2 patterns under calm wind conditions are used as proxy for the spatial patterns of NOx emissions, and the effective atmospheric NOx lifetime is determined from the change of spatial patterns measured at larger wind speeds. Emissions are subsequently derived from the NO2 mass above the background, integrated around the source of interest.Lifetimes and emissions are estimated for 17 power plants and 53 cities located in non-mountainous regions across China and the USA. The derived lifetimes for the ozone season (May-September) are 3.8aEuro-+/- aEuro-1.0aEuro-h (meanaEuro-+/- aEuro-standard deviation) with a range of 1.8 to 7.5aEuro-h. The derived NOx emissions show generally good agreement with bottom-up inventories for power plants and cities. Regional inventory shows better agreement with top-down estimates for Chinese cities compared to global inventory, most likely due to different downscaling approaches adopted in the two inventories.