Maps of the “Urban Heat Islands” of Milan, Paris and Prague seen from space. Scientists: ‘Plant trees to cool cities’

Effect urban heat islands (from English urban heat island Effect), known for some time. Then the city is warmer than in the countryside. But what is the temperature? tool from International Space StationCall Ecostressby measuring the Earth’s temperatures in cities Milan, Prague and Paris Last June 18 in the early afternoon. “Urban heat islands occur when natural land cover, such as vegetation, is replaced by a high concentration of pavement, buildings and other surfaces that absorb and retain heat,” ESA explains.

ESA | Here is Milan. You will immediately notice the refreshing effect of Parco Sempione, City Life and the green areas of the Porta Garibaldi area. Missing body of water for Heat Island County

The space agency experts continue: “The images clearly show how hot the surface is in the built-up areas of cities,” but they also clearly highlight the impact. refreshing From Gardens, plants and pondsThe latter has been colored in various shades of blue and green indicating this. Temperatures between 32 and 41 degreesand those grounded which also reach i 48°C. This phenomenon is caused by cement surfaces They have a high thermal inertia – like cast iron radiators – they are heated once Heat dissipates very slowly.

Indicators for city planners

ESA | In Paris, the cold Seine eel stands out. With close observation, you can also see how tree-lined streets are cooler than vegetated-free streets.

This type of survey shows the website of the European Space Agency, the European Space Agency that implements the project in collaboration with NASA, and provides useful information for mitigating future heat waves through better water resource management. The two agencies recently started a partnership to study and find solutions to climate change. technology that will be game changer for urban planners. Experts have always advised Plant more trees in the cities To cool it down, as mentioned in an article by Fox. In fact, water evaporates from the leaves of plants, which in its transition from a liquid state to a gaseous state uses energy that would otherwise be absorbed by the soil, which further heats the concrete forest in cities.

New tool for farming

ESA | Prague, also thanks to its great vegetation, is the most wonderful of the three cities

ESA also states that another goal of the surveys is to meet the needs of European farmers in order to make agricultural production more sustainable at a time when droughts are becoming increasingly common and intense. The goal is to get greater productivity from the same amount of water used.

More and more frequent heat waves

These results come at a time when most of Europe is suffering from a strong heat wave that reached record temperatures in that period in many cities. “Heat waves,” we read on the ESA website, “appear to be increasing in frequency, intensity and duration due to human-caused climate change. Last June was a stinging reminder of what lies ahead.” For several days in a row, many European cities touched temperatures above 40 degrees. he is Rome and NaplesFor example, they have never touched me 40 degrees Very early in the year.

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