Abstract. Black carbon (BC) is a primary and inert pollutant often used as traffic tracer. Even though its concentrations are generally low at the regional scale, BC presents very high in streets (at local scale), potentially with important effects on human health environment. Modeling studies of usually underestimate due to uncertainties both emissions modeling. Both exhaust non-exhaust presen...

Correlation between traffic density and particle size distribution in a street canyon and the dependence on wind direction J. Voigtländer, T. Tuch, W. Birmili, and A. Wiedensohler Leibniz Institute for Tropospheric Research, Leipzig, Germany UFZ Center for Environmental Research, Department of Human Exposure Research and Epidemiology, Leipzig, Germany Received: 14 February 2006 – Accepted: 6 Ma...

Atmospheric dry deposition is typically modelled using an average roughness length, which depends on land use. This classical roughness-length approach cannot account for the spatial variability of dry deposition in complex settings such as urban areas. Urban canopy models have been developed to parametrise momentum and heat transfer. We extend this approach here to mass transfer, and a new dry...

The latent heat transfer associated with tree transpiration is one of the influences trees on surrounding physical environment and it important to predict rate correctly in order evaluate urban water budgets. When are planted as a countermeasure against warming street canyon design, necessary influence commonly typical summer days accurately rather than that particular certain day. Various pred...

Number fractions of externally mixed particles of four different sizes (30, 50, 80, and 150 nm in diameter) were measured using a Volatility Tandem DMA. The system was operated in a street canyon (Eisenbahnstrasse, EI) and at an urban background site (Institute for Tropospheric Research, IfT), both in the city of Leipzig, Germany as well as at a rural site (Melpitz (ME), a village near Leipzig)...

Solar UV radiation has both adverse and beneficial effects to human health. Using models (a radiative transfer model coupled to a building shading model), together with satellite and surface measurements, we studied the un-obstructed and obstructed UV environments in a sub-tropical urban environment featured with relatively high pollution (aerosol) loadings and high-rise buildings. Seasonal pat...

The benefits of ‘green infrastructure’ are multi-faceted and well-documented, but estimating those individual street-scale planting schemes at planning can be challenging. This is crucial to avoid undervaluing proposed in cost–benefit analyses, ensure they resilient ‘value engineering’ between implementation. Here, we introduce prototype software enabling urban practitioners estimate the site-s...