Many people are highly exposed to climate change through tourism activities. However, conventional evaluations of tourism climate suitability have consistently relied on uniform indicators. In reality, the combination of meteorological factors that tourists are sensitive to and the threshold ranges for their comfort vary across different climate zones. This study, for the first time, utilizes a dataset of 2,326,954 tourist behaviors in hiking to validate the differences in sensitivity to meteorological conditions among tourists in different climate zones and to assess the historical and future tourism suitability in various climate zones. The findings reveal the following key results: (1) The sensitivity of hiking activities to meteorological factors varies among tourists in different climate zones. For instance, tourists in the mid-subtropics and south temperate zones show a lesser sensitivity to precipitation, while those in the southern subtropics are less affected by temperature fluctuations. Tourists in plateau climate zones appear to be insensitive to both precipitation and average relative humidity. (2) Significant differences exist in the climate comfort ranges for tourists from different climatic regions when engaging in hiking activities. Tourists in the mid-subtropics exhibit the highest tolerance for daily maximum temperatures during hiking, whereas those in arid and semiarid regions have a greater comfort threshold for average relative humidity compared to individuals in humid and subhumid regions. (3) Over the past decade, the southern subtropics experienced the highest number of days suitable for hiking among tourists, while the plateau climate zone recorded the fewest. The frequency of comfortable hiking days per year (CDY) increased for tourists in the north subtropics, mid-subtropics, southern subtropics, and plateau climate zones but declined for tourists in the mid-temperate and south temperate zones. (4) Looking ahead to the future, climate conditions conducive to hiking for tourists in different climate zones are generally trending towards deterioration. By the year 2080, both the mid-subtropics and south temperate zones are projected to have the fewest CDY. While the southern subtropics may still have the most CDY for tourists’ hiking, it is anticipated to experience the most rapid decrease.

中文翻译：

---

南亚热带未来气候舒适区加速收缩：徒步大数据分析与模拟的见解


许多人通过旅游活动高度暴露于气候变化。然而，传统的旅游气候适宜性评价一直依赖于统一的指标。事实上，不同气候带游客敏感的气象因素组合及其舒适度阈值范围也有所不同。本研究首次利用2,326,954条旅游徒步行为数据集验证不同气候带游客对气象条件敏感度的差异，评估不同气候带历史和未来的旅游适宜性。研究结果揭示了以下主要结果：（1）不同气候带的游客徒步活动对气象因素的敏感性存在差异。例如，中亚热带和南温带地区的游客对降水的敏感度较低，而南亚热带地区的游客受气温波动的影响较小。高原气候区的游客似乎对降水和平均相对湿度都不敏感。 (2)不同气候区域的游客进行徒步活动时的气候舒适度范围存在显着差异。中亚热带地区的游客在徒步旅行时对每日最高温度的耐受性最高，而干旱和半干旱地区的游客与潮湿和半湿润地区的游客相比，对平均相对湿度的舒适阈值更大。 （3）近10年来，南亚热带地区适合游客徒步的天数最多，高原气候区最少。 北亚热带、中亚热带、南亚热带和高原气候区游客每年舒适徒步天数（CDY）增加，中温带和南温带游客减少。 （4）展望未来，各气候区有利于游客徒步的气候条件总体呈恶化趋势。到 2080 年，中亚热带和南温带预计 CDY 最少。虽然南亚热带地区的游客徒步旅行 CDY 可能仍然最高，但预计下降速度最快。