• Cities across the country will begin to reach “climate departure”: a symbolic rubicon, after which a climate falls completely outside historical norms.
• Even the coldest year, going forward, will be hotter than the hottest in the past.
• The concept was defined in 2013 by researchers at the University of Hawai’i, who crunched computer models of 39 different planetary futures to arrive at their predictions.
• In a scenario consistent with roughly two degrees warming by mid-century,

• the article doesn't mention two important points
  • a number of places are expected to reach climate departure in the 2020's, such as
    • Manokwari, Indonesia in 2020
    • Lagos and Jakarta in 2029
  • Even if we decarbonize at the most aggresive RCP pathway, it would not prevent climate departure, but only delay it by a few decades
• The implications are profound. It means that the living organisms on most places on the planet will be on a path to extinction or migration. The entire biosphere will be in migration and this also has profound implications on human social and economic systems. Species whose livelihood billions of people depend on will be migrating to other parts of the environment, potentially devastating large swathes of local economies the world over.

• climate departure global map (2013)
  • https://manoa.hawaii.edu/news/attachments/img6034_3468l.gif
• Annotation of Dr. Camilo Mora's 2013 paper on climate departure:
  • https://bafybeieahubpyssaodlciia3o3rminifeb63mpmgafqxliqj4nwilkojze.ipfs.4everland.io/

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• There will be massive human migration
• Europe is already unable to cope with the migration of a million climate refugees from Syria
• The US is polarized due to mass migration of a few people escaping climate crisis and violence in central and South America
• Developed countries will be overwhelmed with climate refugees number in the millions or tens of millions
• In addition to human migration, the migration of species seeking cooler temperatures will fundamentally reshape our economies
• climate departure is the date when local climate goes outside normal historical bounds and locally adapted species do not recognize it anymore and will be forced to migrate to survive
• climate departure is a huge issue that is going to happen, regardless of which decarbonoization path we take. This means all species on the globe will be undergoing dramatic environmental shifts, making mass extinction more likely.

reference

• Dr. Camilo Mora et al. seminal 2013 paper on climate departure: https://hyp.is/go?url=https%3A%2F%2Fbafybeihfoajtasczfz4s6u6j4mmyzlbn7zt4f7hpynjdvd6vpp32zmx5la.ipfs.dweb.link%2FTheprojectedtimingofclimatedeparture2013.pdf&group=vnpq69nW