Intraday adaptation to extreme temperatures in outdoor activity
Name
s41598-022-26928-y.pdf
Description
Published version
Size
2.22 MB
Format
Adobe PDF
Checksum (MD5)
3c621407f4230367c2bf89df74f0c371
Author(s)
Fan, Yichun
Wang, Jianghao
Obradovich, Nick
Zheng, Siqi
Date Issued
2023
Journal
Scientific Reports
Publisher
Springer Science and Business Media LLC
Citation
Fan, Y., Wang, J., Obradovich, N. et al. Intraday adaptation to extreme temperatures in outdoor activity. Sci Rep 13, 473 (2023).
Version
Final published version
Abstract
Linkages between climate and human activity are often calibrated at daily or monthly resolutions, which lacks the granularity to observe intraday adaptation behaviors. Ignoring this adaptation margin could mischaracterize the health consequences of future climate change. Here, we construct an hourly outdoor leisure activity database using billions of cell phone location requests in 10,499 parks in 2017 all over China to investigate the within-day outdoor activity rhythm. We find that hourly temperatures above 30 °C and 35 °C depress outdoor leisure activities by 5% (95% confidence interval, CI 3–7%) and by 13% (95% CI 10–16%) respectively. This activity-depressing effect is larger than previous daily or monthly studies due to intraday activity substitution from noon and afternoon to morning and evening. Intraday adaptation is larger for locations and dates with time flexibility, for individuals more frequently exposed to heat, and for parks situated in urban areas. Such within-day adaptation substantially reduces heat exposure, yet it also delays the active time at night by about half an hour, with potential side effect on sleep quality. Combining empirical estimates with outputs from downscaled climate models, we show that unmitigated climate change will generate sizable activity-depressing and activity-delaying effects in summer when projected on an hourly resolution. Our findings call for more attention in leveraging real-time activity data to understand intraday adaptation behaviors and their associated health consequences in climate change research.
MIT Department
Massachusetts Institute of Technology. Department of Urban Studies and Planning
Massachusetts Institute of Technology. Center for Real Estate
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/s41598-022-26928-y
