Ship Tracks

Ship tracks are referred to as “accidental geoengineering”. Nanoparticles from sea vessels are released into the air in the form of “ship tracks”, streaks of clouds from shipping emissions that can reach several miles wide and several hundred miles long.

“‘Ship tracks' above the northern Pacific Ocean. These patterns are produced when fine particles from ship exhaust float into a moist layer of atmosphere. The particles seed new clouds or attract water from existing cloud particles. Image taken by the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard NASA’s Aqua satellite on July 3, 2010.” Quote and image credit

The inadvertent geoengineering experiment that the world is now shutting off (2024)
Humans May Be Accidentally Geoengineering the Oceans
Combustion Nanoparticles from Aviation and Shipping
MIT: We’re about to kill a massive, accidental experiment in reducing global warming