Old 13th Oct 2019, 09:22
  #22 (permalink)  
Join Date: Jan 2007
Location: East of Edenbridge
Age: 58
Posts: 85
Not sure about contrails but;

Ships churning through the Atlantic Ocean produced this patchwork of bright, criss-crossing cloud trails off the coast of Portugal and Spain. The narrow clouds, known as ship tracks, form when water vapor condenses around tiny particles of pollution that ships emit as exhaust or that form from gases in the exhaust. Ship tracks typically form in areas where low-lying stratus and cumulus clouds are present.
The high reflectivity of ship track clouds means they shade Earth’s surface from incoming sunlight, which produces a local cooling effect. However, determining whether ship tracks have a global cooling effect is challenging because the way particles affect clouds remains one of the least understood and most uncertain aspects of climate science.
See NASA page; https://earthobservatory.nasa.gov/im...-in-the-clouds

Overall, clouds are thought to cool Earth’s surface by shading about 60 percent of the planet at any one time and by increasing the reflectivity of the atmosphere. Given that, just a 5 percent increase in cloud reflectivity could compensate for the entire increase in greenhouse gases from the modern industrial era in the global average. Likewise, long-term decreases in cloudiness could have major impacts.
Source; https://earthobservatory.nasa.gov/fe...sols/page1.php

Last edited by OPENDOOR; 13th Oct 2019 at 09:36. Reason: More information
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