The study in the Lancet Planetary Health examines various data collected from 3,739 locations worldwide between Dec. “It is our viewpoint that most studies of the identified 70 publications have had significant flaws that have prevented them from providing a robust scientific basis for the association between temperature and COVID-19,” write the authors, led by Zhaomin Dong, a researcher at Beihang University’s School of Space and Environment.
That analysis, which appears in Environmental Research Letters, also finds that most of the peer-reviewed studies evaluated “were rushed to completion” and have substantial,” flaws, including in their methodology or data design. But that data is an “inappropriate” measure to use, according to a review of the academic literature published earlier this year on the topic, “ Data-related and methodological obstacles to determining associations between temperature and COVID-19 transmission.” Prior studies focus on what the weather was like on the date a positive COVID-19 case was recorded. “We are trying to associate weather with the time when people get exposed to the virus,” Xu explains, adding that the delay lasts an estimated 10 to 14 days. The main difference is that the current study accounts for the delay between when someone contracts COVID-19 and when public health officials record their positive test result. The study differs from earlier research on weather and COVID-19. Xu and Hazhir Rahmandad, an associate professor of system dynamics at MIT’s Sloan School of Management, are the lead authors. Their paper, “ Weather, air pollution, and SARS-CoV-2 transmission: a global analysis,” appears in the October 2021 edition of The Lancet Planetary Health. They also learned that people are at a higher risk of catching COVID-19 when temperatures are low and outdoor levels of ultraviolet radiation are very high. Xu and his fellow researchers discovered a correlation between temperatures above 25 degrees Celsius, or 77 degrees Fahrenheit, and lower rates of COVID-19 infection.
#Corona weather climate windows
On warm, sunny days, people tend to spend more time outside and keep doors and windows open at home. When it’s chilly and snowy, they’re more likely to gather indoors, where there’s less air circulation, he adds. But people also behave differently across seasons. He says there is biological evidence the virus is more active at lower temperatures.
#Corona weather climate driver
Researchers still aren’t sure what the main driver behind the change is, however, Xu notes. Prior studies had provided inconsistent results. As temperatures drop and winter conditions intensify, COVID-19 infection rates easily could rise, warns statistician Ran Xu, an assistant professor at the University of Connecticut’s Department of Allied Health Sciences.Ī recent study he co-authored confirms a link between weather and coronavirus transmission, which, regardless of where you live on the planet, tends to slow in hot weather and increase when it’s cold.
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