Renner Eberhard, Münzenberg Annette
Institute for Tropospheric Research, Permoserstr. 15, D-04318 Leipzig, Germany.
Environ Sci Pollut Res Int. 2003;10(3):147-53. doi: 10.1065/espr2003.05.154.
The role of biogenic emissions in tropospheric ozone production is currently under discussion and major aspects are not well understood yet. This study aims towards the estimation of the influence of biogenic emissions on tropospheric ozone concentrations over Saxony in general and of biogenic emissions from brassica napus in special. MODELLING TOOLS: The studies are performed by utilizing a coupled numerical modelling system consisting of the meteorological model METRAS and the chemistry transport model MUSCAT. For the chemical part, the Euro-RADM algorithm is used. EMISSIONS: Anthropogenic and biogenic emissions are taken into account. The anthropogenic emissions are introduced by an emission inventory. Biogenic emissions, VOC and NO, are calculated within the chemical transport model MUSCAT at each time step and in each grid cell depending on land use type and on the temperature. The emissions of hydrocarbons from forest areas as well as biogenic NO especially from agricultural grounds are considered. Also terpene emissions from brassica napus fields are estimated. SIMULATION SETUP AND METEOROLOGICAL CONDITIONS: The simulations were performed over an area with an extension of 160 x 140 km2 which covers the main parts of Saxony and neighboring areas of Brandenburg, Sachsen-Anhalt and Thuringia. Summer smog with high ozone concentrations can be expected during high pressure conditions on hot summer days. Typical meteorological conditions for such cases were introduced in an conceptual way.
It is estimated that biogenic emissions change tropospheric ozone concentrations in a noticeable way (up to 15% to 20%) and, therefore, should not be neglected in studies about tropospheric ozone. Emissions from brassica napus do have a moderate potential to enhance tropospheric ozone concentrations, but emissions are still under consideration and, therefore, results vary to a high degree.
Summing up, the effect of brassica napus terpene emissions on ozone concentrations is noticeable, but not too pronounced. The results give a preliminary estimate on what the effect due to brassica napus emissions could be until better parameterizations can be derived from measurements.
生物源排放物在对流层臭氧生成中的作用目前仍在讨论中，其主要方面尚未得到充分理解。本研究旨在总体评估生物源排放在萨克森州对流层臭氧浓度方面的影响，特别是油菜的生物源排放的影响。
本研究利用了由气象模型METRAS和化学传输模型MUSCAT组成的耦合数值建模系统来开展。化学部分采用了欧洲区域酸沉降模型（Euro-RADM）算法。
考虑了人为排放和生物源排放。人为排放通过排放清单引入。生物源排放物、挥发性有机化合物（VOC）和一氧化氮（NO）在化学传输模型MUSCAT中，根据土地利用类型和温度，在每个时间步长和每个网格单元中进行计算。考虑了森林地区的碳氢化合物排放以及特别是农业用地的生物源NO排放。还估算了油菜田的萜烯排放。
模拟在一个面积为160×140平方公里的区域上进行，该区域覆盖了萨克森州的主要部分以及勃兰登堡州、萨克森 - 安哈尔特州和图林根州的相邻地区。在炎热夏季的高压条件下，预计会出现高臭氧浓度的夏季烟雾。以概念性方式引入了此类情况的典型气象条件。
据估计，生物源排放以显著方式改变对流层臭氧浓度（高达15%至20%），因此，在对流层臭氧研究中不应被忽视。油菜的排放确实具有一定程度增强对流层臭氧浓度的潜力，但排放情况仍在研究中，因此结果差异很大。
总之，油菜萜烯排放对臭氧浓度的影响是显著的，但不太明显。在能够从测量中得出更好的参数化之前，这些结果给出了油菜排放影响的初步估计。
