Experts from the University of Seville highlight that these systems mean an energy saving for building owners, contribute to reducing pollution and cushioning temperatures
Researchers from the Higher Technical School of Agricultural Engineering of the University of Seville have published a study in which they indicate that it would be necessary to have between 207 and 740 hectares of green rooves, depending on the scenario that is contemplated, to reduce the effects of climate change in relation to the maximum temperature rises of between 1.5 and 6 ºC that are estimated by the end of the century. This would require between 11 and 40% of the buildings in the city.
In this project, published in the review Building and Environment, they have used Landsat 7 ETM+ and Sentinel-2 satellite images to obtain the normalised difference vegetation index (NDVI) and ground temperature.
Given the inverse relationship observed between their values, it has been possible to determine the additional area of vegetation needed (in this case of green rooves) necessary to reduce the temperature by the same amount as it is predicted to rise in different climate change models for Seville.
"To mitigate the effects of climate change, we can talk about two types of options: to attack it at its origin, by eliminating or reducing the human factors that contribute to it (such as, reducing emissions, controlling pollution, etc.) or developing strategies that allow for its effects to be reduced, such as, in the case that concerns us, increasing green areas in cities, using, for example, the tops of buildings as green rooves", states the University of Seville researcher, Luis Pérez Urrestarazu.
The installation of these gardens would provide better insulation for the buildings, which would mean, on one hand, an energy saving for their owners, and, on the other, if there were sufficient green rooves, an improvement in environmental conditions, contributing to a reducing pollution and cushioning the higher temperatures.
"To fight against climate change, this is without doubt a necessary strategy at a global level. However, local measures can be established that contribute to this global strategy and which can help to reduce the local effects that might be produced in one's own city", adds Pérez.
The University of Seville research group 'Naturación Urbana e Ingeniería de Biosistemas (Urban Naturalisation and Biosystem Engineering)' works on different projects connected to non-conventional urban naturalisation, especial vertical gardens, and in aquaponics, joint production of plants and fish.
Luis Pérez Urrestarazu | EurekAlert!
Scientists on the road to discovering impact of urban road dust
18.01.2018 | University of Alberta
Gran Chaco: Biodiversity at High Risk
17.01.2018 | Humboldt-Universität zu Berlin
On the way to an intelligent laboratory, physicists from Innsbruck and Vienna present an artificial agent that autonomously designs quantum experiments. In initial experiments, the system has independently (re)discovered experimental techniques that are nowadays standard in modern quantum optical laboratories. This shows how machines could play a more creative role in research in the future.
We carry smartphones in our pockets, the streets are dotted with semi-autonomous cars, but in the research laboratory experiments are still being designed by...
What enables electrons to be transferred swiftly, for example during photosynthesis? An interdisciplinary team of researchers has worked out the details of how...
For the first time, scientists have precisely measured the effective electrical charge of a single molecule in solution. This fundamental insight of an SNSF Professor could also pave the way for future medical diagnostics.
Electrical charge is one of the key properties that allows molecules to interact. Life itself depends on this phenomenon: many biological processes involve...
At the JEC World Composite Show in Paris in March 2018, the Fraunhofer Institute for Laser Technology ILT will be focusing on the latest trends and innovations in laser machining of composites. Among other things, researchers at the booth shared with the Aachen Center for Integrative Lightweight Production (AZL) will demonstrate how lasers can be used for joining, structuring, cutting and drilling composite materials.
No other industry has attracted as much public attention to composite materials as the automotive industry, which along with the aerospace industry is a driver...
Scientists at Tokyo Institute of Technology (Tokyo Tech) and Tohoku University have developed high-quality GFO epitaxial films and systematically investigated their ferroelectric and ferromagnetic properties. They also demonstrated the room-temperature magnetocapacitance effects of these GFO thin films.
Multiferroic materials show magnetically driven ferroelectricity. They are attracting increasing attention because of their fascinating properties such as...
08.01.2018 | Event News
11.12.2017 | Event News
08.12.2017 | Event News
19.01.2018 | Materials Sciences
19.01.2018 | Health and Medicine
19.01.2018 | Physics and Astronomy