evidence: What’s remarkable is the sheer variety and intensity of the anomalies in recent weeks, which is itself an unprecedented clustering. There’s actually an interrelationship among all these records because oceanic warmth is such a crucial driver of atmospheric warmth. Close to 90% of the energy trapped by added greenhouse gases is stored in the global ocean, so it only takes a minor shift in ocean storage to have huge consequences on the adjacent atmosphere. The global storehouse of oceanic heat measured to depths of 2,000 meters (6,600 feet) has hit record highs almost every year since 2000, and it did so again in 2022. [...] Jet-stream weirdness — not well understood, but with some links to human-caused climate change — has been a key facet of Northern Hemisphere weather and climate in recent weeks. Intense high pressure developed over Canada in late spring, leading to record summerlike heat in May and June, parching the landscape, and laying the foundation for massive wildfires from Alberta to Quebec and recurrent smoke plumes flowing into the United States. As the main polar jet stream arced far to the north around the Canadian high, a subtropical branch kept June largely mild over much of the central and eastern U.S., with widespread and frequent hailstorms. In contrast to much of the world, New York, Los Angeles, and Washington, D.C., all had unusually cool Junes. Meanwhile, the subtropical zone from northern Mexico to Texas and parts of the Gulf Coast suffered in record-melting heat, with extreme moisture pushing heat indices above 115°F in some areas.