Rising Temperatures Could Make Air Travel Even Worse
as a record-breaking heat wave
through the southwest United States
dozens of flights were canceled when the blisteringly hot conditions made it hard for jets to take off
. New research suggests this wasn't a one-off event, and that
The problem has to do with basic aerodynamics. As air gets warmer, its density declines, and in this thinner air, wings are less able to generate lift. When it gets super hot-like around 120 degrees F-a pilot waiting for takeoff has to start taking certain factors into consideration, such as the type of
shows that, as temperatures around the world increase, and as
"Our results suggest that weight restriction may impose a non-trivial cost on airline and impact
As noted in the study, average global temperatures have risen by nearly one degree C (1.9 F) since 1980, and they're expected to go up another three degrees C (5.4 F) by 2100 if emissions continue to grow unchecked.
To understand the difficulties of future flights in a warming world, Coffel's team used pre-existing climate models , and observations from the NOAA-NCEI Global Historical Climatology Network (GHCN) . The researchers considered performance models across a wide range of jets, including the common Boeing 737-800, and over a dozen of the busiest airports around the world, including those in the United States, Europe, the Middle East, China, and South Asia.
The airport most challenged by future heat waves will be those featuring short runways, high altitudes, and, unsurprisingly, a propensity for heat waves. All things being equal (i.e. we do nothing to curb greenhouse gas emissions), the study projects some planes will have to reduce fuel capacities and payload weights by as much as four percent on the hottest days. That could amount to a reduction of 12 to 13 fewer passengers on an average 160-seat craft. In the most extreme cases, a big plane on a short runway would have to reduce its passengers by half.
To address these problems, the researchers suggest designing new engines or body designs, and expanding runway lengths. But these solutions are expensive and, for some airports, simply impossible. We also need to start fixing this thing that is climate change.
[ Climatic Change ]