Abstract

Knowledge about variations in allergenic pollen in the atmosphere is essential for human health programmes. This study aims to evaluate the influence of climatic variability on the arboreal pollen (AP) load, considering the annual, seasonal and intra-diurnal variability during ten years. We obtain data using a volumetric Burkard spore trap in San Miguel de Tucumán city. The seasonal behaviour of AP showed a short and intense flowering period from August to October. However, annual pollen concentrations varied considerably with 2008 and 2012 the years with the lowest and highest pollen contributions, respectively. The qualitative composition of the AP was represented mainly by Broussonetia papyrifera, Morus, Celtis, Alnus, Platanus, Fraxinus, Myrtaceae, Juglans and Salix. During the ten years of continuous sampling, there was little variation in the pollen concentration per hour. The lowest and highest contribution occurred at 2 p.m., and 2 a.m., respectively. There was a strong seasonal effect on AP concentration. Air temperature positively affected AP concentrations, while air humidity negatively affected AP concentrations. Overall, the shape and intensity of the seasonal AP pattern in this region appears to be driven by long-term phenological dynamics.

摘要

了解大气中致敏花粉的变化对于人类健康计划至关重要。本研究旨在评估气候变化对树栖花粉 (AP) 负荷的影响，考虑到十年间的年度、季节性和日间变化。我们使用 San Miguel de Tucumán 市的体积 Burkard 孢子陷阱获取数据。AP的季节性行为表现出从8月到10月的短暂而强烈的开花期。然而，每年花粉浓度与 2008 年和 2012 年分别是花粉贡献最低和最高的年份差异很大。AP 的定性成分主要有Broussonetia papyrifera , Morus , Celtis , Alnus ,悬铃木、白蜡、桃金娘科、胡桃和柳属。在连续采样的十年中，每小时花粉浓度几乎没有变化。最低和最高贡献分别发生在下午 2 点和凌晨 2 点。对 AP 浓度有很强的季节性影响。空气温度对 AP 浓度有积极影响，而空气湿度对 AP 浓度有负面影响。总体而言，该地区季节性 AP 模式的形状和强度似乎是由长期物候动态驱动的。