4 ms·

The graphs of water temperature over the last 2 years have been off the charts - literally; required adjusting the y-axis: https://twitter.com/LeonSimons8/stat

by yboris 3y ago

The graphs of water temperature over the last 2 years have been off the charts - literally; required adjusting the y-axis: https://twitter.com/LeonSimons8/status/1754540413350732180 https://twitter.com/LeonSimons8/status/1754540413350732180

phkahler 3y ago
But why is that? Why a sudden jump this year?
- ancientworldnow 3y ago
  One component is that El Nino started. Until 2023 we were in La Nina that was suppressing ocean temperatures.
  - deleted 3y ago
    [deleted]
- downWidOutaFite 3y ago
  The reduction of sulfur dioxide pollution from shipping in 2020 has had a pro-warming effect.
- malfist 3y ago
  Change in the fuels cargo ships use. Previous fuels where high in sulfur which is all kinds of nasty, but has the benefit if seeding clouds. More warming this year is due to fewer clouds, at least partially.
- steve_adams_86 3y ago
  Another component besides el ninõ could be pollution from shipping emissions: https://www.ox.ac.uk/news/2022-10-06-new-analysis-shipping-emissions-reveals-air-pollution-has-larger-effect-climate https://www.ox.ac.uk/news/2022-10-06-new-analysis-shipping-e...
- kouru225 3y ago
  If I remember correctly: Ships were using a particular type of gas that was outlawed recently. Turns out it was also acting as a coolant for the atmosphere. The bad news is that global warming is further along than we expected. The good news is that we now have evidence that a global campaign for cooling the atmosphere can actually work. Can’t find sources right now, but it was very interesting when it came out ~6 months ago.
  - Levitating 3y ago
    > it was very interesting when it came out ~6 months ago. It was also underreported. Hank Green made a great video about it.[1] It lists some sources in the description. [1]: https://youtu.be/dk8pwE3IByg?si=aiOv-7MGZRa6D9lS https://youtu.be/dk8pwE3IByg?si=aiOv-7MGZRa6D9lS https://www.science.org/content/article/changing-clouds-unforeseen-test-geoengineering-fueling-record-ocean-warmth https://www.science.org/content/article/changing-clouds-unfo...
    - kouru225 3y ago
      Tyty I tried looking for the link and couldn’t find any information. Felt like I was going crazy
- hn_throwaway_99 3y ago
  The next self reply to that tweet (xeet?) hypothesizes it is reduction in aerosols (massive reduction in sulfur in global shipping): https://twitter.com/LeonSimons8/status/1754541230774419929 https://twitter.com/LeonSimons8/status/1754541230774419929
- lalalandland 3y ago
  I heard that ships have cleaner fuel so their exhaust don't block as much solar radiation.[1] [1] https://pubs.rsc.org/en/content/articlelanding/2023/ea/d2ea00081d# https://pubs.rsc.org/en/content/articlelanding/2023/ea/d2ea0...!
- michael1999 3y ago
  There are lots of forces, and the feedback loops are starting to hit. - Warming has been going on for 200 years, so we are deep into it. - The polar ice sheet has been shrinking because it is warmer. So instead of the long summer days reflecting off the ice, they are absorbed by the ocean. - Shipping has been eliminating sulphur from bunker fuel to reduce acid rain and smog (2020 change), and the lack of smog allows more sun to reach the earth. The recent shock of cleaner shipping exhaust has combined with the historical warming and the feedback loops of falling ice albedo (and others) shows up in warmer water. https://www.nasa.gov/missions/aqua/nasa-study-finds-evidence-that-fuel-regulation-reduced-air-pollution-from-shipping/ https://www.nasa.gov/missions/aqua/nasa-study-finds-evidence... https://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph/ https://nsidc.org/arcticseaicenews/charctic-interactive-sea-...

by yboris 3y ago

phkahler 3y ago

But why is that? Why a sudden jump this year?

ancientworldnow 3y ago
One component is that El Nino started. Until 2023 we were in La Nina that was suppressing ocean temperatures.
- deleted 3y ago
  [deleted]
downWidOutaFite 3y ago
The reduction of sulfur dioxide pollution from shipping in 2020 has had a pro-warming effect.
malfist 3y ago
Change in the fuels cargo ships use. Previous fuels where high in sulfur which is all kinds of nasty, but has the benefit if seeding clouds. More warming this year is due to fewer clouds, at least partially.
steve_adams_86 3y ago
Another component besides el ninõ could be pollution from shipping emissions: https://www.ox.ac.uk/news/2022-10-06-new-analysis-shipping-emissions-reveals-air-pollution-has-larger-effect-climate https://www.ox.ac.uk/news/2022-10-06-new-analysis-shipping-e...
kouru225 3y ago
If I remember correctly: Ships were using a particular type of gas that was outlawed recently. Turns out it was also acting as a coolant for the atmosphere. The bad news is that global warming is further along than we expected. The good news is that we now have evidence that a global campaign for cooling the atmosphere can actually work. Can’t find sources right now, but it was very interesting when it came out ~6 months ago.
- Levitating 3y ago
  > it was very interesting when it came out ~6 months ago. It was also underreported. Hank Green made a great video about it.[1] It lists some sources in the description. [1]: https://youtu.be/dk8pwE3IByg?si=aiOv-7MGZRa6D9lS https://youtu.be/dk8pwE3IByg?si=aiOv-7MGZRa6D9lS https://www.science.org/content/article/changing-clouds-unforeseen-test-geoengineering-fueling-record-ocean-warmth https://www.science.org/content/article/changing-clouds-unfo...
  - kouru225 3y ago
    Tyty I tried looking for the link and couldn’t find any information. Felt like I was going crazy
hn_throwaway_99 3y ago
The next self reply to that tweet (xeet?) hypothesizes it is reduction in aerosols (massive reduction in sulfur in global shipping): https://twitter.com/LeonSimons8/status/1754541230774419929 https://twitter.com/LeonSimons8/status/1754541230774419929
lalalandland 3y ago
I heard that ships have cleaner fuel so their exhaust don't block as much solar radiation.[1] [1] https://pubs.rsc.org/en/content/articlelanding/2023/ea/d2ea00081d# https://pubs.rsc.org/en/content/articlelanding/2023/ea/d2ea0...!
michael1999 3y ago
There are lots of forces, and the feedback loops are starting to hit. - Warming has been going on for 200 years, so we are deep into it. - The polar ice sheet has been shrinking because it is warmer. So instead of the long summer days reflecting off the ice, they are absorbed by the ocean. - Shipping has been eliminating sulphur from bunker fuel to reduce acid rain and smog (2020 change), and the lack of smog allows more sun to reach the earth. The recent shock of cleaner shipping exhaust has combined with the historical warming and the feedback loops of falling ice albedo (and others) shows up in warmer water. https://www.nasa.gov/missions/aqua/nasa-study-finds-evidence-that-fuel-regulation-reduced-air-pollution-from-shipping/ https://www.nasa.gov/missions/aqua/nasa-study-finds-evidence... https://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph/ https://nsidc.org/arcticseaicenews/charctic-interactive-sea-...