Know more

About cookies

What is a "cookie"?

A "cookie" is a piece of information, usually small and identified by a name, which may be sent to your browser by a website you are visiting. Your web browser will store it for a period of time, and send it back to the web server each time you log on again.

Different types of cookies are placed on the sites:

  • Cookies strictly necessary for the proper functioning of the site
  • Cookies deposited by third party sites to improve the interactivity of the site, to collect statistics

Learn more about cookies and how they work

The different types of cookies used on this site

Cookies strictly necessary for the site to function

These cookies allow the main services of the site to function optimally. You can technically block them using your browser settings but your experience on the site may be degraded.

Furthermore, you have the possibility of opposing the use of audience measurement tracers strictly necessary for the functioning and current administration of the website in the cookie management window accessible via the link located in the footer of the site.

Technical cookies

Name of the cookie


Shelf life

CAS and PHP session cookies

Login credentials, session security



Saving your cookie consent choices

12 months

Audience measurement cookies (AT Internet)

Name of the cookie


Shelf life


Trace the visitor's route in order to establish visit statistics.

13 months


Store the anonymous ID of the visitor who starts the first time he visits the site

13 months


Identify the numbers (unique identifiers of a site) seen by the visitor and store the visitor's identifiers.

13 months

About the AT Internet audience measurement tool :

AT Internet's audience measurement tool Analytics is deployed on this site in order to obtain information on visitors' navigation and to improve its use.

The French data protection authority (CNIL) has granted an exemption to AT Internet's Web Analytics cookie. This tool is thus exempt from the collection of the Internet user's consent with regard to the deposit of analytics cookies. However, you can refuse the deposit of these cookies via the cookie management panel.

Good to know:

  • The data collected are not cross-checked with other processing operations
  • The deposited cookie is only used to produce anonymous statistics
  • The cookie does not allow the user's navigation on other sites to be tracked.

Third party cookies to improve the interactivity of the site

This site relies on certain services provided by third parties which allow :

  • to offer interactive content;
  • improve usability and facilitate the sharing of content on social networks;
  • view videos and animated presentations directly on our website;
  • protect form entries from robots;
  • monitor the performance of the site.

These third parties will collect and use your browsing data for their own purposes.

How to accept or reject cookies

When you start browsing an eZpublish site, the appearance of the "cookies" banner allows you to accept or refuse all the cookies we use. This banner will be displayed as long as you have not made a choice, even if you are browsing on another page of the site.

You can change your choices at any time by clicking on the "Cookie Management" link.

You can manage these cookies in your browser. Here are the procedures to follow: Firefox; Chrome; Explorer; Safari; Opera

For more information about the cookies we use, you can contact INRAE's Data Protection Officer by email at or by post at :


24, chemin de Borde Rouge -Auzeville - CS52627 31326 Castanet Tolosan cedex - France

Last update: May 2021

Menu Logo Principal

Home Page

The ANR (French National Research Agency) project COOLTREES

"The cooling of cities by trees"

Urban vegetation professionals are in demand of information and tools to complete and support their planning decisions, notably in order to deal with upcoming climate changes.


Nuage de mots qui a été réalisé lors d'un atelier collaboratif qui a permis de définir clairement Cooltrees avec chaque partenaire.
Nuage de mots traduisant la vision du projet par les partenaires du projet.

COOLTREES has constructed and evaluated on the construction and evaluation of a modelisation and 3D simulation software and collected new information regarding urban vegetation. The results provide lines of thought for professionals as well as perspectives for the development of 3D modeling tools for the planning of trees. The goal is to be able to test the impacts of a planning before its implementation in order to optimize the services provided, notably in terms of urban heat island effect mitigation.

Two principal results are emerging !

1 : A global, substantial and researched database

This database gathers 5 years of field measurements taken in the botanical garden of Strasbourg’s University.

This database gathers global meteorological measurements as well as physiological measurements taken on lime trees 'Tillia tomentosa' during this work period. It will be available for all in 2023. In the meantime, a Data Paper describing the database will be published following the work of the researchers in 2022.

2 : A modelisation and 3D simulation software : LASER.T (LAtent SEnsible Radiation & Trees) 


LASER. T merges the software LASER/F, on which the research team TRIO from the Icube laboratory of Strasbourg is working since 2009, and the software RATP developed par the INRAE of Clermont-Ferrand, which allows to model and simulate with an accuracy of within one centimeter the interactions between trees and their environment.

It operates on the basis of the meteorological measurements corresponding to the present microclimate, the materials’ characteristics, and the trees’ physiological information. You can choose to perform a model at a given time, or in a day or more provided that the computer is given sufficient time to perform the calculations.

What happens in the software ?

Based on the different data, the software simulates and calculates all the existing interactions between the elements composing the scene as well as their physiological and physical responses. It then concludes an energy balance and provides different data, such as the elements’ surface temperature.

Once the modeling is done, a window presents the 3D scene and different filters allow to choose the information highlighted.

In addition to these information, it is possible to perform comfort index calculations, based on all the data, in order to know the scene temperature as well as calculate the evapotranspiration of one or more trees. Examples are presented in the synthesis of the project available for free download.

But what does these modelisation look like?

Let’s start from the beginning of the project; the botanical garden of Strasbourg’s University where the measures presented in the database were taken. Here is the modelisation that was done with LASER/F:

Bonne versions Jardin universitaire de Strasbourg _ LASER.T

Everything is possible with this software. For example, it is possible to create a canyon street and let the software simulate an entire day. You will find in the project’s synthesis this same scene with a few alterations in order to highlight the impact of trees on the microclimate of the street at 9 am, 1pm and 6pm.