Is Clear Air Turbulence becoming more common?

Climate change, jet streams, and CAT

• Thread centers on whether warming strengthens or weakens jet streams and how that affects clear air turbulence (CAT).
• Some argue warming poles reduce the equator–pole temperature gradient, so jets should weaken and meander more, locking in weather patterns.
• Others cite the linked work and additional studies claiming climate change increases the density/moisture contrast between tropics and poles, which can strengthen jet streams even if pure temperature gradients weaken.
• Several note the system is highly nonlinear and seasonal (polar night, teleconnections like El Niño/La Niña, QBO, mountain torque), so averages and local behavior can differ.
• General takeaway in the thread: CAT-conducive conditions appear to be increasing, but the physical explanation is complex and partly model-based.

Evidence, accidents, and uncertainty

• Accident statistics from NTSB show no clear upward trend in turbulence-related accidents; turbulence-caused airliner crashes are extremely rare.
• Explanations offered:
  • Aircraft are designed with substantial structural margins.
  • Better forecasting, routing, and avoidance may offset increased CAT frequency.
  • Official stats only include events with serious injuries/damage, so more light/moderate CAT might not show up.
• CAT intensity is reported via subjective pilot reports plus some newer objective sensors (eddy dissipation rate), but coverage and long-term, standardized records are limited.
• Some call out misunderstandings of the cited study (it used 42 years of reanalysis, not just two years).

Operations, procedures, and routing

• A commercial pilot notes more widespread use of continuous descent profiles (staying higher for longer with engines at idle) makes descents more efficient but can expose passengers to more high-altitude instability, potentially changing perceived turbulence without any climate effect.
• Dispatchers optimize routes and altitudes for winds and fuel; sometimes flying higher, even into stronger winds, saves fuel overall.
• Conflict-related airspace closures (Ukraine, Russia, Israel, Afghanistan) may force longer, more constrained Europe–South Asia routings, plausibly limiting options to avoid bad areas, though the article’s maps show global CAT increases, not confined to that corridor.

Altitude, private jets, and the tropopause

• CAT is most common near the tropopause (roughly mid-20k to high-30k feet).
• Many airliners and private jets can cruise around 37–43k feet; reasons cited include traffic separation, better performance in thin air, higher true airspeed, and sometimes smoother ride.

Safety, fear, and risk perception

• Multiple comments stress that turbulence is mostly a comfort issue; structural failures from turbulence in large airliners are effectively historical.
• Real risk is to unrestrained occupants, especially cabin crew who must walk around; seatbelts are strongly recommended whenever seated.
• Some compare turbulence to a boat hitting waves: alarming but usually safe; others note that “true” severe turbulence (loss of control) is very rare.
• Anxiety is common; a few readers say they paradoxically feel safer in turbulence because it ensures pilots are fully alert.

Measurement, data, and technology

• Discussion on why accelerometer/turbulence data aren’t routinely streamed: flight data recorders have limited storage and downloading is labor- and downtime-intensive; any added hardware/software faces costly certification and maintenance constraints.
• Some suggest leveraging passenger phones’ accelerometers via in-flight Wi-Fi, or tapping existing aircraft-based meteorological systems, but regulatory and data-ownership issues are noted.
• A startup claims to use tablet sensors plus AI to build real-time CAT maps for airlines, advertising both safety and small fuel savings.
• Another commenter mentions research into forward-looking LIDAR to detect CAT ahead of the aircraft; feasibility and deployment remain unclear.

Perception, media, and alternative explanations

• Some speculate that more flights, plus broader Wi-Fi and social media, amplify public perception of turbulence increases (“internet-enabled flight bias”), regardless of underlying trends.
• Others emphasize that the article’s central claim is about physical increases in CAT conditions from reanalysis data, not necessarily about documented increases in injury incidents.
• A few climate-skeptical remarks appear (“is there anything global warming can’t do?”), met with responses that increased atmospheric energy naturally affects phenomena like turbulence, while acknowledging remaining uncertainties in magnitude and mechanisms.