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High temporal resolution of airborne Ambrosia pollen measurements above the source reveals emission characteristics
Atmospheric Environment ( IF 5 ) Pub Date : 2018-11-01 , DOI: 10.1016/j.atmosenv.2018.08.040
B. Šikoparija , G. Mimić , M. Panić , O. Marko , P. Radišić , T. Pejak-Šikoparija , A. Pauling

Abstract The aim of this study was to setup a field experiment that will collect suitable data for parameterizing the release of Ambrosia pollen. The study took place on the Pannonian plain during three flowering seasons: 2014, 2015 and 2016. The sampling of airborne pollen was performed using volumetric spore traps at 0.5 m and 5 m above the canopy level of a strong homogenous Ambrosia artemisiifolia L. field (10 m × 10 m) in three temporal resolutions: 1 h, 7.5 min and 1.07 min. This high temporal resolution revealed characteristics that were hitherto unknown. Pollen production per day was estimated to range from 6.38 billion to 770 billion pollen grains for the whole experimental field. Measurements of meteorological parameters included: temperature, relative humidity, solar radiation, precipitation, wind speed and wind direction. Weak correlations between pollen concentration and meteorological parameters were obtained, indicating nonlinear relationships among them. The distribution of pollen concentration with respect to meteorological parameters showed that high pollen concentrations coincide with temperature in the interval 20–24 °C, and that relative humidity of around 95% can delay or even switch off the emission, while the turbulent kinetic energy of a wind less than 0.1 m2 s−2 is sufficient for lifting the pollen into the air. The test of the new model for Ambrosia pollen emission processes showed a strong correlation between measured and modeled data when the estimated emission capacity for the field was in the range of 45–75 billion pollen grains per day.

中文翻译:

源上方空气传播的Ambrosia花粉测量的高时间分辨率揭示了发射特征

摘要 本研究的目的是建立一个田间试验,该试验将收集合适的数据来参数化Ambrosia 花粉的释放。该研究在潘诺尼亚平原的三个开花季节进行:2014 年、2015 年和 2016 年。使用体积孢子捕集器在一个强均质的 Ambrosia artemisiifolia L. 田的冠层水平以上 0.5 m 和 5 m 处对空气中的花粉进行采样( 10 m × 10 m) 三种时间分辨率:1 小时、7.5 分钟和 1.07 分钟。这种高时间分辨率揭示了迄今为止未知的特征。整个试验田每天的花粉产量估计为 63.8 亿至 7700 亿个花粉粒。气象参数的测量包括:温度、相对湿度、太阳辐射、降水、风速和风向。花粉浓度与气象参数之间的相关性较弱,表明它们之间存在非线性关系。花粉浓度相对于气象参数的分布表明,高花粉浓度与 20-24°C 区间的温度一致,95% 左右的相对湿度可以延迟甚至关闭发射,而湍流动能小于 0.1 m2 s-2 的风足以将花粉吹​​到空气中。当估计该田地的排放能力在每天 45-750 亿个花粉粒的范围内时,对Ambrosia 花粉排放过程的新模型的测试表明,测量数据和模型数据之间存在很强的相关性。表示它们之间的非线性关系。花粉浓度相对于气象参数的分布表明,高花粉浓度与 20-24°C 区间的温度一致,95% 左右的相对湿度可以延迟甚至关闭发射,而湍流动能小于 0.1 m2 s-2 的风足以将花粉吹​​到空气中。当估计该田地的排放能力在每天 45-750 亿个花粉粒的范围内时,对Ambrosia 花粉排放过程的新模型的测试表明,测量数据和模型数据之间存在很强的相关性。表示它们之间的非线性关系。花粉浓度相对于气象参数的分布表明,高花粉浓度与 20-24°C 区间的温度一致,95% 左右的相对湿度可以延迟甚至关闭发射,而湍流动能小于 0.1 m2 s-2 的风足以将花粉吹​​到空气中。当估计该田地的排放能力在每天 45-750 亿个花粉粒的范围内时,对Ambrosia 花粉排放过程的新模型的测试表明,测量数据和模型数据之间存在很强的相关性。而 95% 左右的相对湿度可以延迟甚至关闭排放,而小于 0.1 m2 s-2 的风的湍流动能足以将花粉提升到空气中。当估计该田地的排放能力在每天 45-750 亿个花粉粒的范围内时,对Ambrosia 花粉排放过程的新模型的测试表明,测量数据和模型数据之间存在很强的相关性。而 95% 左右的相对湿度可以延迟甚至关闭排放,而小于 0.1 m2 s-2 的风的湍流动能足以将花粉提升到空气中。当估计该田地的排放能力在每天 45-750 亿个花粉粒的范围内时,对Ambrosia 花粉排放过程的新模型的测试表明,测量数据和模型数据之间存在很强的相关性。
更新日期:2018-11-01
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