Abstract
The increasing aging population in China leads to increase in the demand for various types of aged outdoor spaces. To improve living quality for elderly, a safe, convenient, comfortable, accessible, and livable environment system is going on creating for the elderly. Field investigation of thermal comfort was carried out in Xining, China in October, 2020 for a week in order to obtain thermal responses of the elderly to outdoor climate shift in autumn at high altitude. Typical climate characteristics of Xining in autumn and the subjective responses of the elderly were collected. The results showed that the thermal sensation of the elderly is mostly neutral, and most of the elderly feel that the environment is a little dry. Also, the elderly were more likely to expect higher ambient temperatures and higher or constant humidity. For outdoor activity space in autumn in Xining, the thermoneutral black globe temperature（t_g）of the elderly is about 16.10℃. The research results of this paper can provide reference for the design of outdoor thermal environment for the elderly in autumn in Xining, Qinghai.
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