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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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[-] silence7@slrpnk.net 18 points 9 months ago* (last edited 9 months ago)

The big issue here is where to set the baseline; do we set it based on temperatures in the late 1800s, when there start to be widespread records of thermometer-based temperature readings (what we've done in the past) or do we set it at an earlier time, based on when people's dumping of CO2 from burning fossil fuels had not yet caused warming.

You can argue about the quality of any given proxy, but they do generally paint a similar picture.

[-] PapaStevesy@midwest.social 14 points 9 months ago

You're a sea sponge, aren't you? Nice try, sea sponge

[-] beebarfbadger@lemmy.world 2 points 9 months ago

We've been made. Abort. Abort.

this post was submitted on 05 Feb 2024
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.

As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades: Graph of temperature as observed with significant warming, and simulated without added greenhouse gases and other anthropogentic changes, which shows no significant warming

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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