On weird weather's impact on air travel

d0ctrine

Jul 14

With the wet season comes a lot of thunderstorms and there have been increasing occurrences of lighting alerts around Ninoy Aquino International Airport (NAIA) that led to the grounding of many planes. That resulted in long delays and surely an inconvenience to a lot of passengers. It looks like 'weird' weather or extreme weather events are here to stay and may even become worse as we continue to grapple with climate change and warmer weather. I am sharing a recent article about this here:

Hoover, A. (July 13, 2023) "Weird weather is making air travel even worse," Wired, https://www.wired.com/story/weird-weather-is-making-air-travel-even-worse/?bxid=5bd6761b3f92a41245dde413&cndid=37243643&esrc=AUTO_OTHER&source=Email_0_EDT_WIR_NEWSLETTER_0_DAILY_ZZ&utm_brand=wired&utm_campaign=aud-dev&utm_content=WIR_Daily_071323&utm_mailing=WIR_Daily_071323&utm_medium=email&utm_source=nl&utm_term=P4 [Last accessed: 7/14/2023]

Quoting from the article:

"But there are more complicated, invisible effects of a warming world too. Hotter air is trapped near the ground, and cooler air above. Shifts in temperature gradients affect the wind shear, or the changes in speed and direction between air near the ground and at higher elevations. These eddies create clear air turbulence, which occurs in the absence of clouds. Light turbulence can cause sudden changes in altitude that feel like bumps, but severe turbulence can cause structural stress to the aircraft.

Turbulence isn't just unpleasant. It's the cause of more than one third of injuries aboard air carriers, according to the US National Transportation Safety Board, and in rare instances can even lead to death.

Changing wind patterns may also alter flight lengths. If, for example, there are stronger eastward winds, flights from the US to Europe will speed up, but flights in the other direction may take longer. Transatlantic flights may even need to reroute and refuel.

Research from Paul Williams, a professor of atmospheric science at the University of Reading in the UK, found that jet stream changes could increase the amount of time flights are in the sky each day, leading to more fuel burning, higher costs, and more CO2 emissions. Jet streams are high-altitude air currents that drive weather systems. As the Arctic warms, the North Atlantic Jet Stream is changing, leading to more odd weather.

But heat alone can also lead to delays and cancellations, like when a 119-degree day in Phoenix grounded planes in 2017. That's because high temperatures decrease air density. When the air is less dense, planes need more time and distance to fight gravity as they take off—so they may need a longer runway to become airborne. Not all airports can accommodate these sudden changes."