[en] The importance of climate change and the consequences that it can have on human health give rise to the emergence of new studies on the rise of temperature in cities. Cities are points that generate an accelerated emission of greenhouse gases, causing that the effects of this change are greater in these zones. The air becomes contaminated and the tem-perature increases. The lack of vegetation due to the accumulation of concrete and asphalt makes it difficult to dissipate heat, creating the "Urban Heat Island", an air layer above the city which is hotter than the air around it. Through the ENVI-met program, the outline of the Plaza Miguel de Unamuno of Bilbao will be modeled to forecast the current microclimatic conditions. The program allows to establish the temperatures that can be reached in the urbanized zone, reason why different scenarios (more woodland, change of building materials, green roofs, water sheets ...) are proposed to establish the guidelines that allow that the effect of the island is mitigated. Thanks to the great options presented by the program, it is possible to model the square in three dimensions. The great versatility of the program has also allowed to choose between a wide range of both materials and trees, as well as giving the option of adding elements such as water sheets or pots. Once the simulations are performed for the different scenarios, ENVI-met will provide data about the environment of the square, such as humidity, temperature, wind speed and direction, solar radiation and dissipation among others, so it will be possible to iden-tify the possible causes of the island effect and to propose an improvement of the thermal com-fort in this urban space. In order to carry out the study, both plans and information on the location and climate of the city have been needed.

[eu] Klima aldaketaren garrantzia eta honek giza osasunean eragin ditzakeen ondorioak direla eta, hirietan ematen diren tenperatura igoerei buruzko ikerketa berriei bidea irekitzen ari zaie. Hiriak era azeleratuan berotegi efektuko gasak isurtzen dituzten puntuak dira, gune hauetan aipatutako aldaketaren eragina nagusituz. Airea kutsatu egiten da eta tenperatura handitu "Bero Uhartea" sortuz, hau da, hiriaren gainean aire geruza bat sortzen da, inguruko airea baino beroagoa dena. ENVI-met programaren laguntzaz Bilboko Miguel de Unamuno plaza irudikatuko da, gaur egungo baldintza mikroklimatuen aurreikuspen bat egiteko. Programak gune urbanizatuan lor daitezkeen tenperaturak ezartzea baimentzen du, ondorioz eszenatoki desberdinak garatuko dira (zuhaitz kopuru gehiago, eraikuntzako material aldaketa, estalki berdeak, ur xaflak…) bero uhartearen efektua txikitzea ahalbideratzen duten arauak ezarri ahal izateko. Programak aurkezten dituen aukera anitzei esker, plaza hiru dimentsioetan irudikatzea posi-ble izango da. Ur xaflak eta loreontziak bezalako elementuak gehitzea, eraikuntzako materiala aldatzea eta zuhaitz mota ezberdinak jartzea baimentzen du programak. Horrek, erabilera uga-riko programa egiteaz gain aukera ematen du eszenatoki desberdinak garatzera. Behin egoera desberdineko simulazioak eginda daudela, ENVI-met-ek plazan lortutako egoeraren berri emango du, aireko tenperatura, hezetasuna, haizearen abiadura eta norabidea, erradiazioa eta dispertsioaren bidez. Beraz posible izango da uhartearen efektua sortzen duen zergatia identifi-katzea eta hiri espazio honetarako konfort termikoaren hobekuntza aurkeztea. Ikerketa egin ahal izateko bai planoak bai kokapenaren informazioa eta hiriaren klimatologia behar izan dira.