Council for Agricultural Research and Economics, Research Centre for the Soil-Plant System, Rome, Italy.
Council for Agricultural Research and Economics, Research Centre for the Soil-Plant System, Rome, Italy.
Environ Pollut. 2016 Nov;218:1278-1286. doi: 10.1016/j.envpol.2016.08.086. Epub 2016 Sep 2.
Urban and peri-urban forests provide a multitude of Ecosystem Services to the citizens. While the capacity of removing carbon dioxide and gaseous compounds from the atmosphere has been tested, their capacity to sequestrate particles (PM) has been poorly investigated. Mediterranean forest ecosystems are often located nearby or inside large urban areas. This is the case of the city of Rome, Italy, which hosts several urban parks and is surrounded by forested areas. In particular, the Presidential Estate of Castelporziano is a 6000 ha forested area located between the Tyrrhenian coast and the city (25 km downtown of Rome). Under the hypothesis that forests can ameliorate air quality thanks to particle deposition, we measured fluxes of PM1, 2.5 and 10 with fast optical sensors and eddy covariance technique. We found that PM1 is mainly deposited during the central hours of the day, while negligible fluxes were observed for PM 2.5 and 10. A Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT v4) simulated PM emission from traffic areas in the city of Rome and showed that a significant portion of PM is removed by vegetation in the days when the plume trajectory meets the urban forest.
城市和城郊森林为市民提供了多种生态系统服务。虽然已经测试了它们从大气中去除二氧化碳和气态化合物的能力，但它们捕获颗粒物（PM）的能力却鲜有研究。地中海森林生态系统通常位于大型城市附近或内部。意大利罗马市就是这种情况，该市拥有几个城市公园，并被森林覆盖。特别是，总统庄园 Castelporziano 是一个 6000 公顷的森林区，位于第勒尼安海海岸和城市之间（距罗马市中心 25 公里）。基于森林可以通过颗粒物沉积来改善空气质量的假设，我们使用快速光学传感器和涡度协方差技术测量了 PM1、2.5 和 10 的通量。我们发现 PM1 主要在白天的中心时段沉积，而 PM2.5 和 10 的通量可以忽略不计。混合单粒子拉格朗日综合轨迹模型 (HYSPLIT v4) 模拟了罗马市交通区域的 PM 排放，并表明当羽流轨迹与城市森林相遇时，植被去除了相当一部分 PM。
