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And in other news (Read 247 times)
lee
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And in other news
Jun 10th, 2025 at 1:43pm
 
According to the International Telecommunications Union, Digital Companies, all 166 of them, were responsible for 8% of global emissions in 2023. that compares to Australia's 22 million people being responsible for 0.04% of claimed emissions, 29% below 2005 emissions. Wink

https://www.itu.int/en/ITU-D/Environment/Documents/Publications/2025/ITU-WBA-Gre...

https://cer.gov.au/markets/reports-and-data/nger-reporting-data-and-registers/20...
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lee
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Re: And in other news
Reply #1 - Jun 18th, 2025 at 1:46pm
 
CO2 source -

"Rivers and streams are an important pathway in the global carbon cycle, releasing carbon dioxide (CO2) and methane (CH4) from their water surfaces to the atmosphere1,2. Until now, CO2 and CH4 emitted from rivers were thought to be predominantly derived from recent (sub-decadal) biomass production and, thus, part of ecosystem respiration3,4,5,6. Here we combine new and published measurements to create a global database of the radiocarbon content of river dissolved inorganic carbon (DIC), CO2 and CH4. Isotopic mass balance of our database suggests that 59 ± 17% of global river CO2 emissions are derived from old carbon (millennial or older), the release of which is linked to river catchment lithology and biome. This previously unrecognized release of old, pre-industrial-aged carbon to the atmosphere from long-term soil, sediment and geologic carbon stores through lateral hydrological routing equates to 1.2 ± 0.3 Pg C year−1, similar in magnitude to terrestrial net ecosystem exchange. A consequence of this flux is a greater than expected net loss of carbon from aged organic matter stores on land. This requires a reassessment of the fate of anthropogenic carbon in terrestrial systems and in global carbon cycle budgets and models."

https://www.nature.com/articles/s41586-025-09023-w

Not fossil fuels? Oops.
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lee
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Re: And in other news
Reply #2 - Jul 21st, 2025 at 1:45pm
 
:Article https://doi.org/10.1038/s41467-025-56925-4
Sedimentary DNA insights into Holocene
Adélie penguin (Pygoscelis adeliae)
populations and ecology in the Ross Sea,
Antarctica:

Deeper in the article -

"SedaDNA also reveals prior occupation of the Cape Hallett Adélie penguin
colony site by southern elephant seal (Mirounga leonina), demonstrating how
terrestrial sedaDNA can detect faunal turnover events in Antarctica driven by
past climate or sea ice conditions."

Cape Hallett is 2,000km south of the current range of elephant seals.

"A high relative abundance of southern elephant seal was detected in
sedaDNA from basal (> 35 cm depth) sediments at Cape Hallett
(Fig. 6). A subsequent decline in the relative abundance of southern
elephant seal and increase in Adélie penguin was evident from both
mitochondrial and LCA approaches, and coincided with an
increasing abundance of penguin eggshell and ornithogenic soil
development (Fig. 6). The upper 10 cm of stratigraphy was unable to
be sampled for sedaDNA due to the lack of fine sediment, but as with
the ornithogenic soil layer below also contained common penguin
bones and feathers (Fig. 6). We suggest that the dominance of
southern elephant seal DNA in the basal sediments at Cape Hallett is
strong evidence for the former presence of a local breeding colony.
While individual southern elephant seals occasionally come ashore
on the Antarctic coast to rest 55,57 , such sporadic visitations would
likely result in DNA being detected only within a single depth hor-
izon. The relative dominance of elephant seal DNA spanning ~ 40 cm
of stratigraphy suggests a more sustained local presence of multiple
individuals, such as would be expected if a breeding colony were
present.
Southern elephant seal breeding colonies are currently restricted
to islands within the subantarctic region of the Southern Ocean.
However, the discovery of desiccated pup remains and hairs preserved
in sediments indicate the species formerly moulted and bred along the
Victoria Land Coast from Campbell Glacier in the north to Marble Point
in the south58
. Radiocarbon dating of elephant seal remains from the
Victoria Land Coast indicates that reduced sea ice extent between
~ 2500 and 1000 years ago allowed elephant seals to breed at these
southern latitudes and attain a large local population
44,45 before
experiencing a local extirpation event that began in the south and
progressed northwards as sea ice expanded58,59"

https://www.nature.com/articles/s41467-025-56925-4.pdf

I guess it was warmwer back then, and no runaway warming. Wink
.
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Bobby.
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Re: And in other news
Reply #3 - Jul 21st, 2025 at 2:06pm
 
Google AI.


Antarctica has not always been covered in ice. In the distant past, it was ice-free and even supported forests and wildlife. For example, during the Cretaceous Period, Antarctica experienced a warm, temperate climate with rainforests and dinosaurs. Around 34 million years ago, a significant climate shift led to the formation of the Antarctic ice sheet.
Here's a more detailed look:

Cretaceous Period (140 to 66 million years ago):
Antarctica was part of the supercontinent Gondwana and had a warm, temperate climate, with lush vegetation including rainforests.

Pre-Oligocene:
Before the Oligocene epoch (around 34 million years ago), Antarctica had little to no polar ice, and the climate was generally warmer.

Eocene-Oligocene Transition (around 34 million years ago):
A major cooling event led to the formation of the Antarctic ice sheet. This transition marked the shift from a "greenhouse world" to an "icehouse world".

Evidence:

Fossil discoveries of plants and animals, including dinosaurs and marsupials, as well as analysis of rock sediments, provide evidence of Antarctica's warmer, ice-free past.
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Captain Nemo
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Re: And in other news
Reply #4 - Jul 24th, 2025 at 11:44pm
 
Antarctica was quite a bit further North from the South pole way back when. So it's not as if the climate was much warmer at those Southern latitudes long ago, it's more a case of continental drift. The poles will always be cold places.
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The 2025 election WAS a shocker.
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lee
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Re: And in other news
Reply #5 - Jul 25th, 2025 at 12:43pm
 
Captain Nemo wrote on Jul 24th, 2025 at 11:44pm:
Antarctica was quite a bit further North from the South pole way back when. So it's not as if the climate was much warmer at those Southern latitudes long ago, it's more a case of continental drift. The poles will always be cold places.


How much continental drift in 2000 years?
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lee
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Re: And in other news
Reply #6 - Jul 25th, 2025 at 5:05pm
 
The International Court of Justice (ICJ) has found nations culpable under AGW on the harm caused. This is despite IPCC AR6 at Table 12.12 of finding no current harms and not likely before 2100, and that only under the flawed RCP 8.5.

And yet they believe the IPCC on all things, according to the judgement. Shocked
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