determination of suitable calendar for tourism in tabriz with using the thermo-physiological indices (pet and pmv)

abstract many indices designed by researches for study of human-biometeorology and bioclimatology that today broadly using for assessing the relationships between the climate and tourism .among the proposed indices, thermo- physiological indices as pet and pmv that derived from human energy balance models, important from others. to define of proper calendar for tourism in tabriz we have used of thermal-physiology indexes. conclusion of this study that was done with ray man model show there are a lot of time limitation for tourism in tabriz because of limited days of thermal comfort. with regard to concluded results of mentioned indexes, thermal comfort in tabriz is not more than 45 days, while period of cold stress is more than 240 days and heat stress is about 80 days. thus cold weather is the principal problem in regard to tourism climatology in tabriz. it is necessary and vital for related organizations, trip tourism executors and voyager that have more notice to this critical subject. keywords: thermo-physiology indices, thermal comfort, human energy balance model, tourism climatology, tabriz.