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首页> 外文会议>Tenth International Conference on Modelling, Monitoring and Management of Air Pollution Jul, 2002 City of Segovia >Estimation of NO_2 emissions from lightning and biomass burning: A case study using tropospheric NO_2-data derived from GOME
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Estimation of NO_2 emissions from lightning and biomass burning: A case study using tropospheric NO_2-data derived from GOME

机译：闪电和生物质燃烧引起的NO_2排放估算：以来自国美的对流层NO_2数据为例

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摘要

Nitric oxides play a key role among the anthropogenic trace gases. They affect human health and have an impact on ozone chemistry and climate change. So the knowledge of the NO_2 sources and their strength is of great interest. The main sources of NO_2 are industrial emissions, traffic, biomass burning, lightning and soil emissions. There are several approaches to quantify the different source strengths, and the estimated values vary widely (especially for lightning). In this study, NO_2 data was taken from image sequences of the Global Ozone Monitoring Experiment (GOME) spectrometer on board the ERS-2 satellite. In contrast to measurements using ground-based, balloon- or aircraft-borne sensors, this instrument provides, for the first time, the possibility of mapping global NO_2 column densities. By applying image processing techniques, maps of tropospheric NO_2 are obtained. It is possible to distinguish between the different sources in case studies. Though there are some uncertainties concerning ground albedo, snow cover, cloud fraction and height, yet quantitative estimations are possible. Here, regional NO_2 production by lightning andi biomass burning is estimated. For this purpose a region was chosen, where a) industrial emissions can be neglected and b) lightning and fires do not coincide in place and time.
机译：一氧化氮在人为微量气体中起关键作用。它们影响人类健康，并影响臭氧化学和气候变化。因此，对NO_2来源及其强度的认识引起了极大的兴趣。 NO_2的主要来源是工业排放，交通，生物量燃烧，闪电和土壤排放。有几种方法可以量化不同的光源强度，并且估计值相差很大（尤其是对于闪电）。在这项研究中，NO_2数据来自ERS-2卫星上全球臭氧监测实验（GOME）光谱仪的图像序列。与使用地面，气球或飞机传感器进行测量相比，该仪器首次提供了绘制整体NO_2色谱柱密度的可能性。通过应用图像处理技术，获得了对流层NO_2的图。在案例研究中可以区分不同的来源。尽管地面反照率，积雪，云量和高度存在一些不确定性，但仍可以进行定量估计。在此，估计了闪电和生物质燃烧引起的区域NO_2产生。为此，选择了一个区域，其中a）可以忽略工业排放，b）闪电和大火在时间和地点上不重合。

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