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We've already blown past critical 1.5 C climate threshold, sea sponge study claims. Should we believe it? (www.livescience.com)
submitted 9 months ago by GreyShuck@feddit.uk to c/climate@slrpnk.net
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A controversial new study claims we may breach the 2 degrees Celsius (3.6 degrees Fahrenheit) climate change increase threshold by the late 2020s — almost two decades earlier than current projections.

The study, published Feb. 5 in the journal Nature Climate Change, claims global surface temperatures had increased by 1.7 C (3 F) above pre-industrial averages by the year 2020.

However, other scientists have questioned the findings, saying that there are major flaws in the work.

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[-] TropicalDingdong@lemmy.world 6 points 9 months ago

Camille Parmesan, an ecologist at the University of Texas, Austin and a coordinating lead author for the IPCC's 6th Assessment Report, noted that the temperature of one part of the ocean is unlikely to represent ocean temperatures elsewhere. "You cannot extrapolate from the Caribbean to the whole of the world's oceans," Parmesan told Live Science.

Seems like something easy enough to replicate elsewhere.

[-] silence7@slrpnk.net 13 points 9 months ago

There are dozens (are we over 100 yet?) paleoclimate proxies that have made it into the literature at this point. Some tell us about temperature in a single point, others for big regions. This is just one of many.

There's something of an index of them here

[-] Serinus@lemmy.world 10 points 9 months ago

The IPCC keeps rejecting "hot models" that show more warming than CO2 has caused in the past.

Those models keep coming up as accurate often enough that it's now referred to as the "hot model problem".

this post was submitted on 05 Feb 2024
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How much each change to the atmosphere has warmed the world: IPCC AR6 Figure 2 - Thee bar charts: first chart: how much each gas has warmed the world. About 1C of total warming. Second chart: about 1.5C of total warming from well-mixed greenhouse gases, offset by 0.4C of cooling from aerosols and negligible influence from changes to solar output, volcanoes, and internal variability. Third chart: about 1.25C of warming from CO2, 0.5C from methane, and a bunch more in small quantities from other gases. About 0.5C of cooling with large error bars from SO2.

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