[1] Increasing the albedo of urban surfaces has received attention as a strategy to mitigate urban heat islands. Here, the effects of globally installing white roofs are assessed using an urban canyon model coupled to a global climate model. Averaged over all urban areas, the annual mean heat island decreased by 33%. Urban daily maximum temperature decreased by 0.6 C and daily minimum temperatu...

The Grand Canyon is one of the most dramatic features on Earth, yet when and why it was carved have been controversial topics for more than 150 years. Here, we present apatite (4)He/(3)He thermochronometry data from the Grand Canyon basement that tightly constrain the near-surface cooling history associated with canyon incision. (4)He/(3)He spectra for eastern Grand Canyon apatites of differing...

In recent past, significant efforts have been made to improve the scientific understanding of exhaust dispersion phenomenon in urban street canyons/intersection. The amount of turbulence generated by natural winds within the street canyon might be smaller than that of traffic induced turbulence. Therefore, the influence of traffic-induced turbulence on exhaust dispersion has to be quantified. I...

Urban microclimate modelling, both numerical and in the laboratory, has strong implications many relevant health life-style management issues e.g., studies for assessment forecast of air quality (for outdoor and, as boundary conditions, indoor investigations), thermometric trend analysis urban zones, cultural heritage preservation, etc. Moreover, study modelling is largely promoted encouraged b...

Many methods to generate future weather files run building performance simulations have been proposed. However, do not account for local urban climate modifications, such as heat island and may be representative of buildings’ conditions. This study describes a methodology include effects in using multiple tools: the EURO-CORDEX regional model data, Urban Weather Generator, URBVENT canyon wind m...

We present an integrated, three dimensional, model of urban canopy, building energy and radiosity, for early stage urban designs and test it on four urban morphologies. All sub-models share a common descriptions of the urban morphology, similar to 3D urban design master plans and have simple parameters. The canopy model is a multilayer model, with a new discrete layer approach that does not rel...

This research proposes an accurate vehicular positioning system which can achieve lane-level performance in urban canyons. Multiple passive sensors, which include Global Navigation Satellite System (GNSS) receivers, onboard cameras and inertial sensors, are integrated in the proposed system. As the main source for the localization, the GNSS technique suffers from Non-Line-Of-Sight (NLOS) propag...

Flowers and Farley (Reports, 21 December 2012, p. 1616; published online 29 November 2012) propose that the Grand Canyon is 70 million years old. Starkly contrasting models for the age of the Grand Canyon-70 versus 6 million years-can be reconciled by a shallow paleocanyon that was carved in the eastern Grand Canyon 25 to 15 million years ago (Ma), negating the proposed 70 Ma and 55 Ma paleocan...

The implementation of adaptation strategies has become an essential activity spatial planning departments. Passive technologies related to the introduction natural components in form vegetation are used, especially urban development plans, mitigate effects climate change and thus improve quality citizen life. Nature-Based Solutions particular importance areas strict city centers, where historic...