this post was submitted on 13 Nov 2023
152 points (98.7% liked)

Climate - truthful information about climate, related activism and politics.

5243 readers
473 users here now

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.

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.

founded 1 year ago
MODERATORS
silence7@slrpnk.net
152
$266 Trillion in Climate Spending Is a No-Brainer | Without the investment, the alternative is $2.3 quadrillion in accumulated damage by the end of the century. (www.bloomberg.com)
submitted 1 year ago by silence7@slrpnk.net to c/climate@slrpnk.net
21 comments fedilink hide all child comments
you are viewing a single comment's thread
view the rest of the comments
[–] TropicalDingdong@lemmy.world 9 points 1 year ago (5 children)

The numbers are so mind-bogglingly out there, its just hard to fathom, let alone believe it can actually happen.

I was working on some back of the napkins this weekend. I came up with the number 70 trillion megagrams of CO2 in the atmosphere from burning fossil fuels. If you've got a better number, would love to know but its what I got.

For reference, Mauna Loa is about 70 trillion cubic meters from ocean floor. So just round numbers, hand-wavey estimates, thats how much carbon we have to get out of the atmosphere. The largest mountain on earth.

[–] Feathercrown@lemmy.world 1 points 1 year ago* (last edited 1 year ago) (2 children)

Wouldn't it be a 1m square base tower the same height as the mountain? Nowhere near the mountain's volume.

[–] Skua@kbin.social 4 points 1 year ago (1 children)

A 1m square tower that size would only be 4,169 m ^3 . Mauna Loa is mostly basalt, which weighs about 2.9 Mg per m ^3 . This tower would therefore weigh about 12,000 tonnes. You'd need almost 6 billion of those towers to get to the 70 trillion Mg figure.

Mauna Loa's actual mass is probably about three times that number because of the density of the rocks in it, but in terms of orders-of-magnitude estimation it was about right.

load more comments (2 replies)