Are climate crisis and El Nino the only factors for heating up Earth?

Florida State University climate scientist Michael Diamond says shipping is"probably the prime suspect.”

The sulfur pollution used to interact with low clouds, making them brighter and more reflective, but that’s not happening as much now, Yuan said. He tracked changes in clouds that were associated with shipping routes in the North Atlantic and North Pacific, both hot spots this summer. Diamond calculates a warming of about 0.1 degrees Celsius by midcentury from shipping regulations. The level of warming could be five to 10 times stronger in high shipping areas such as the North Atlantic.

A couple of studies use computer models to show a warming effect from all that water vapor. One study, which has not yet undergone the scientific gold standard of peer review, reported this week that the warming could range from as much as 1.5 degrees Celsius of added warming in some places to 1 degree Celsius of cooling elsewhere.

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Scientists Investigate Other Factors Contributing to Earth's Rising TemperaturesScientists are exploring the possibility that global warming and El Nino are not the sole causes of this summer's unprecedented heat. They are now examining the impact of sulfur pollution on cloud formation, which used to make clouds brighter and more reflective. However, recent observations suggest that this interaction is occurring less frequently. Researchers are focusing on shipping routes in the North Atlantic and North Pacific, which have experienced particularly high temperatures this summer.
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