A recent climate report indicates that rising temperatures are presenting both opportunities and challenges for hot air ballooning in the Netherlands. The Royal Netherlands Meteorological Institute (KNMI) report highlights impacts ranging from passenger load limitations to extended flight seasons.
Higher temperatures reduce a balloon’s lift capacity, directly impacting the number of passengers that can be carried. According to experienced balloonist Monique Hoogeslag, a small increase in temperature can mean a reduction of two to three passengers on smaller balloons, and one less passenger for every degree warmer on larger balloons. The Netherlands has warmed by nearly 2 degrees Celsius since 1901.
Ballooning is highly dependent on weather conditions, making it particularly vulnerable to climate change. Flights are restricted to early morning and late evening hours to avoid the heat of the day, but even during these times, weather patterns pose challenges.
The KNMI warns that warmer air can hold more moisture, increasing the risk of sudden downpours and severe thunderstorms. These storms can create dangerous gusts of wind that can affect balloons from a distance of up to 50 kilometers.
Increased frequency and activity of convergence lines, caused by warmer temperatures, pose additional risks. These lines can lead to unexpected course changes and difficult landings for balloonists.
Balloonists are experiencing changes in air behavior, confirming concerns about increased risks. Hans van Hoesel, a long-time ballooning enthusiast, notes that he increasingly cancels flights due to unsafe weather conditions, sometimes facing frustration from customers who do not fully understand the risks.
Ironically, climate-friendly infrastructure, such as wind turbines and solar parks, is further limiting available landing areas for balloons. This adds another layer of complexity to the sport.
The report does offer some positive news: the ballooning season may start earlier and last longer due to milder temperatures. Additionally, drier fields reduce the likelihood of support vehicles getting stuck during equipment retrieval.