The UTCI and the ISB

Area of Science:

• Biometeorology
• Environmental Science
• Human Physiology

Background:

• Human core body temperature regulation is a critical physiological process influenced by environmental thermal conditions.
• Assessing thermal environments is a long-standing focus within biometeorology, with numerous studies and significant citation counts.
• Early thermal assessments relied on simplified indices, evolving to complex heat budget models like the Physiological Equivalent Temperature (PET).

Purpose of the Study:

• To address the limitations and application constraints of existing thermal assessment models.
• To establish a unified and comprehensive 'universal' thermal climate index (UTCI) for outdoor environments.
• To foster collaboration among leading scientists in thermal modeling.

Main Methods:

• Development of the Universal Thermal Climate Index (UTCI) by a dedicated working group under the International Society of Biometeorology.
• Creation of a comprehensive, open-source computational tool for calculating UTCI.
• Utilizing advanced heat budget modeling principles to integrate multiple environmental parameters.

Main Results:

• The UTCI framework provides a standardized method for assessing the thermal environment.
• An open-source tool is available for calculating UTCI, facilitating widespread application.
• The UTCI aims to overcome the shortcomings of previous thermal indices and models.

Conclusions:

• The Universal Thermal Climate Index (UTCI) represents a significant advancement in biometeorological thermal environment assessment.
• The developed open-source tool enhances the accessibility and application of UTCI for scientific research.
• UTCI provides a more robust and universally applicable measure for human thermal comfort and stress in outdoor settings.