Imagine a hidden treasure trove of data, tucked away in the recesses of English churches, that reveals a warming climate. This intriguing story begins with a chance conversation between two researchers, Yangang Xing and Andrew Knight, who discovered a unique source of environmental data: organ-tuning books.
Knight, an organ enthusiast, explained how these books, found in churches across the country, contain valuable information about the climate within these sacred spaces. "I would often find myself at the organ, waiting between hymns or weddings, and the only thing to catch my eye was this little red book," he recalled.
Xing, intrigued by the potential of these books, realized they could provide a wealth of information spanning decades. "It's a goldmine!" he exclaimed. And so, a fascinating research journey began.
Organ tuners, it turns out, are meticulous record-keepers. They jot down observations during their visits, including temperature and humidity readings. This is crucial because the materials used in organs, such as wood and metal, are highly sensitive to climatic changes. Even a slight shift in temperature or humidity can throw these majestic instruments out of tune.
Xing, Knight, and their colleague Bruno Bingley recently published a paper in the journal Buildings & Cities, presenting preliminary data from 18 organ-tuning books associated with churches in London, Nottinghamshire, and Derbyshire. The records, dating back to 1966, reveal a rise in average temperatures inside these churches during both winter and summer periods.
"It's a quantifiable reflection of what we've been witnessing," said Andrew Scott, managing director of Harrison & Harrison, a renowned pipe organ builder and service provider. The data shows an increase in average summer temperatures from 17.2°C in the late 1960s to 19.8°C in the 2020s, indicating a warming trend.
Neil Macdonald, a professor of geography at the University of Liverpool, was fascinated by this unique climate study. "As someone who has worked extensively with historical climate records, I've never come across this. It's a hidden gem!" he exclaimed.
But here's where it gets controversial: while the data suggests a warming trend, Macdonald notes that other factors could influence summer temperatures in churches. Perhaps some churches were better ventilated in the past, for instance. It's a reminder that interpreting climate data can be complex.
Organ tuners are acutely aware of the impact of temperature on their instruments. Even a one-degree Celsius change can alter the pitch of an organ by 0.8 hertz, Scott explained. This means that an organ tuned at 16°C might produce notes that sound different when the temperature rises to 20°C.
And this is the part most people miss: powerful heating systems in churches can have an even more significant impact on pipe organs than external weather conditions. It's a reminder that human activities can sometimes overshadow natural climate variations.
Xing and his colleagues are eager to analyze more organ-tuning book data and have called for anyone with such records to get in touch. "If we can find older records, it would be a fascinating glimpse into the past," he said. "I hope people understand the value of these tuning books and the insights they offer."
So, what do you think? Is this an intriguing way to study climate change, or do you have a different perspective? We'd love to hear your thoughts in the comments!
