Investigación y Posgrado, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Núm 152 Colonia San Bartolo Atepehuacan, Delegación Gustavo A. Madero, 07730 México, DF, Mexico.
Biomed Res Int. 2013;2013:521728. doi: 10.1155/2013/521728. Epub 2013 Jan 31.
Pollutant emissions and their contribution to local and regional air quality at the industrial area of Tula were studied during a four-week period as part of the MILAGRO initiative. A recurrent shallow stable layer was observed in the morning favoring air pollutants accumulation in the lower 100 m atmospheric layer. In the afternoon the mixing layer height reached 3000 m, along with a featuring low level jet which was responsible of transporting air pollutants at regional scales. Average PM10 at Jasso (JAS) and Tepeji (TEP) was 75.1 and 36.8 μ g/m(3), respectively while average PM2.5 was 31.0 and 25.7 μ g/m(3). JAS was highly impacted by local limestone dust, while TEP was a receptor of major sources of combustion emissions with 70% of the PM10 constituted by PM2.5. Average hourly aerosol light absorption was 22 Mm(-1), while aerosol scattering (76 Mm(-1)) was higher compared to a rural site but much lower than at Mexico City. δ(13)C values in the epiphyte Tillandsia recurvata show that the emission plume directly affects the SW sector of Mezquital Valley and is then constrained by a mountain range preventing its dispersion. Air pollutants may exacerbate acute and chronic adverse health effects in this region.
作为“MILAGRO 计划”的一部分，在为期四周的时间里，研究了图拉工业区的污染物排放及其对当地和区域空气质量的贡献。在上午，经常会出现浅层稳定层，有利于污染物在低层大气层（100 米以下）积累。在下午，混合层高度达到 3000 米，同时形成了一个低空急流，负责在区域尺度上输送空气污染物。Jasso（JAS）和 Tepeji（TEP）的平均 PM10 分别为 75.1 和 36.8 μ g/m(3)，平均 PM2.5 分别为 31.0 和 25.7 μ g/m(3)。JAS 受到当地石灰岩粉尘的严重影响，而 TEP 则是燃烧排放的主要来源的受体，其中 70%的 PM10 由 PM2.5 构成。平均每小时气溶胶光吸收为 22 Mm(-1)，而气溶胶散射（76 Mm(-1)）则高于农村地区，但远低于墨西哥城。附生植物 Tillandsia recurvata 的 δ(13)C 值表明，排放羽流直接影响到 Mezquital 山谷的西南区，然后受到山脉的限制，阻止了其扩散。空气污染物可能会加剧该地区的急性和慢性不良健康影响。
