Talk:Global warming

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Role of ships and airplanes in global warming[edit]

It is well known that a single cruiser produces the particulate matter equivalent of 1 million cars for example.

Changed Katharine Hayhoe quote attribuion[edit]

Upon request from Katharine Hayhoe, her job title was changed from climatologist to climate scientist.— Unsigned, by: BeCurieUs / talk / contribs

Hothouse Earth[edit]

https://www.bbc.com/news/science-environment-45084144

Should this be mentioned here? — Unsigned, by: Spacehillbilly / talk / contribs

Sea Level Change[edit]

While the bulk of this article is well written, the section on sea level change contains several inaccurate and misleading pieces:

  • "The most conservative prediction of sea level rise presently predicted is 9–88 cm (3.5–34.6 inches)"

I'm not sure where the 9-88 cm prediction comes from as it is unsourced. Regardless, in AR5 the IPCC estimated sea level rise in high emission scenarios to be 50-98cm by 2100. This is not a conservative estimate, it is a consensus estimate for the worst case scenario the IPCC considers (RCP8.5). A sourced estimate and removal of the word conservative is appropriate.

  • "There is a possibility, however, that the whole Greenland ice sheet would melt leading to a global rise of 7 m (23 ft)"

No there is not. There are absolutely no peer reviewed papers suggesting such a thing is possible in the next 100 or even 200 years, and a quick bit of math reveals just how ridiculous this assertion is. Using facts reported by the Wikipedia page (https://en.wikipedia.org/wiki/Greenland_ice_sheet) on the Greenland ice sheet we find the size of the sheet estimated at 2,850,000 km3 and the melt rate in 2007 estimated at 592 km3 per year. This means that at current melt rates the sheet would take more than 4814 years to melt completely. In my opinion, the original author of this assertion needs to refute the Wikipedia numbers with references to peer reviewed literature or this unattributed assertion needs to be removed.

  • "There is even a possibility that the West Antarctic ice sheet could melt raising sea levels by a further six meters (20 feet)"

This is yet another unsourced assertion that either needs to be backed up by a reference to peer review literature or removed.

  • "Although the rest of the Antarctic is considered to be stable, if the entire Antarctic were to melt, this would raise sea levels by 62 meters (203 feet)."

If "the rest of the Antarctic is considered to be stable", then why is resultant impact worth mentioning? It's a bit like saying "if all the people in Mexico illegally crossed into the US our healthcare and educational systems would collapse." While it is certainly true, the fact that nobody thinks it will happen means the sole purpose of the statement is to scare people. — Unsigned, by: Transcendence / talk / contribs

"Catastrophic" Climate Change[edit]

It should be noted somewhere that a new climate change risk classification was released in September 2017 from UC San Diego that added two classifications of climate change risk: Catastrophic and Existential. Link to Eurekalert publication: https://www.eurekalert.org/pub_releases/2017-09/uoc--ncr091417.php This needs to be differentiated from the "CAGW" snarl word, since the word "Catastrophic" is clear in the risk classification. — Unsigned, by: 142.160.174.101 / talk

ice age fallacy[edit]

I don't understand how the paragraph about global cooling demonstrates that global cooling is a fallacy. This is the graph sent with the denial: https://www.apocalypse.60n.eu/wp-content/uploads/2018/09/holocene-delta-18o-multi-proxies2.jpg Is it possible to improve this section please ? TYIA, keep up the great work — Unsigned, by: Agravetoncas / talk / contribs

Article rating[edit]

Is it feasible to demote this to silver? --It's-a me, Lgm sigpic.png LeftyGreenMario!(Mod) 04:31, 2 July 2019 (UTC)

Fallacy?[edit]

For example, after 9/11 global air traffic more or less shut down, and the lack of contrails led to the discovery that airplane contrails act to stabilize air temperature throughout the day[70]. The real world is complicated,[citation NOT needed] and people use science to discover how it works. As such, scientific knowledge marches ever forward, and obviously the world has been warming. But the few works published have been enough for "climate skeptics" to strip mine for quotes. ... Trotting out the global cooling trope is sometimes called the ice age fallacy.

In what world is a theory with evidence considered a fallacy? Do we simply ignore ice ages of the past and pretend as if the Earth's climate has always been stable? Science is not about cherry-picking or, at least, should not be. Ajuran (talk) 17:00, 8 July 2019 (UTC)

  • a theory with evidence
  • global cooling (within today's context)
Pick one. --It's-a me, Lgm sigpic.png LeftyGreenMario!(Mod) 22:52, 8 July 2019 (UTC)