#uöäü1sink
March 2, 2025 at 10:24 AM
We had in 2023 a much weaker ocean carbon uptake then expected caused by higher SSTs

Here a study on the CO2 uptake by the Indian Ocean (IO)

Higher SSts, positive Indian Ocean Dipole (IOD) and high rates of Pacific water to the IO caused a possitve CO2 outgassing signal

#climate #uöäü1sink
November 28, 2024 at 10:52 PM
The problem is that the new class of extremes can dry out soils and vegetation much faster then in the past, which will lead to exceptional fire conditions

Sadly the same will happen in most forest areas, suddenly they will burn large scale...

#climate #uöäü1sink #uöäü1fire
Canadian forests are more conducive to high-severity fires in recent decades
Canada has experienced more-intense and longer fire seasons with more-frequent uncontrollable wildfires over the past decades. However, the effect of these changes remains unknown. This study identifi...
www.science.org
January 13, 2025 at 1:21 AM
As ocean sink is declining/weakening some more studies:

"about 16% overestimating of Southern Ocean carbon sink over the past three decades. In particular, the Southern Ocean carbon sink since 2010 was notably overestimated by approximately 29%."

#climate #uöäü1sink
The Southern Ocean carbon sink has been overestimated in the past three decades - Communications Earth & Environment
Surface partial pressure of carbon dioxide in the Southern Ocean has been underestimated, in particular beneath sea ice, because of uneven observational density in winter and summer, suggesting that t...
www.nature.com
December 29, 2024 at 6:25 PM
We are in the process to trigger a non-linear Carbon feedback - at least it seems ever more likely...

"The model analysis illustrates the existence of dynamic, non-linear tipping points in carbon cycle dynamics and the potential complexity of planetary boundaries"

#climate #feedbacks #uöäü1sink
The topology of non-linear global carbon dynamics: from tipping points to planetary boundaries - IOPscienceSearch
The topology of non-linear global carbon dynamics: from tipping points to planetary boundaries, J M Anderies, S R Carpenter, Will Steffen, Johan Rockström
iopscience.iop.org
December 14, 2024 at 4:51 PM
Another example of why the ocean carbon sink could be in decline despite the studies on this reduction that seems to happening

"Unexpected decline of the ocean carbon sink under record-high sea surface temperatures in 2023"

#climate #ocean #uöäü1sink
assets-eu.researchsquare.com
March 2, 2025 at 3:47 PM
As SST anomalies patterns in the global oceans will likely continue to intensify fast the coming years here a study result on how SSTs in the tropics affect gross primary production in East Asia

Graphical abstract attached

#climate #uöäü1sink
December 17, 2024 at 11:04 PM
The #Arctic boreal carbon sink is now no significant carbon sink anymore

1/3 already a emitter

Soon it will become one as a whole...

Terrestrial carbon sink is now collapsing...

#climate #uöäü1sink
Wildfires offset the increasing but spatially heterogeneous Arctic–boreal CO2 uptake - Nature Climate Change
How the carbon stocks of the Arctic–Boreal Zone change with warming is not well understood. Here the authors show that wildfires and large regional differences in net carbon fluxes offset the overall ...
www.nature.com
January 21, 2025 at 8:24 PM
On the causes of the 2023 Amazon drought - SST patterns important - drought persisted during El Nino and La Nina till today

Main constant: a persisting warmer North Atlantic ocean since 24 months which weakens trade winds, so maybe here the strongest connection...

#climate #uöäü1sink
The new record of drought and warmth in the Amazon in 2023 related to regional and global climatic features - Scientific Reports
Scientific Reports - The new record of drought and warmth in the Amazon in 2023 related to regional and global climatic features
www.nature.com
January 5, 2025 at 2:04 PM
They are the back bone of forests and its worsening the problem:

Global Decline in Large Old Trees

#Earth #climate #uöäü1sink
Global Decline in Large Old Trees
The loss of large old trees in many ecosystems around the world poses a threat to ecosystem integrity.
www.science.org
December 18, 2024 at 7:22 PM
Growing aridity poses threats to global land surface (2024)

"This total increase of 9.99 million km² in arid areas represents 5.9% of the global land surface"

#Climate #uöäü1sink #Earth #Carbon #CMIP6
Growing aridity poses threats to global land surface - Communications Earth & Environment
From 1960 to 2023, 27.9% of the global land surface became more arid, while 20.5% became less arid, resulting in a 5.9% increase in arid regions, linked to reduction of land’s carbon sink capacity and...
www.nature.com
March 2, 2025 at 5:31 PM
Ecosystems that experience continuous abrupt shifts are now widespread...

Its another indication that the terrestrial carbon sink is now increasingly coming under pressure and likely in the process of collapse

#climate #Earth #uöäü1sink
Continuous Abrupt Vegetation Shifts in the Global Terrestrial Ecosystem
We quantified previously overlooked patterns and drivers of global continuous abrupt shifts (CAS) over a long time series. The results indicate that CAS are more prevalent in regions with high temper...
onlinelibrary.wiley.com
February 4, 2025 at 3:48 PM
As the ocean carbon sink is in decline or plateaued here a study on it:

"Using a global ocean biogeochemistry model, we find that without climate change, the mean carbon uptake 2000–2019 would have been 13% higher and the trend 1958–2019 would have been 27% higher. "

#climate #uöäü1sink #oceans
December 8, 2024 at 3:16 PM
Next preprint on the tipping of the tropical rainforests that could start from 1.5°C onward

Significance: the Amazon rainforest could be already trapped in a vicious cycle leading to its demise...

#climate #uöäü1sink #Earth #climatewarming
EGUsphere - Multi-fold increase in rainforests tipping risk beyond 1.5–2 °C warming
egusphere.copernicus.org
December 18, 2024 at 7:51 PM
What had been obvious the last years: "Abrupt increase in Arctic-Subarctic wildfires caused by future permafrost thaw"; www.nature.com/articles/s41...

The carbon cycle is now in the process of decline likely accelerating fast...

#climate #uöäü1feedback #uöäü1sink
Abrupt increase in Arctic-Subarctic wildfires caused by future permafrost thaw - Nature Communications
In a warming world, future rapid permafrost thawing can cause significant soil drying, surface warming, and atmospheric drying in the Arctic-Subarctic region, leading to an intensification of peat and...
www.nature.com
October 15, 2024 at 8:40 PM
On the declining ocean carbon sink:

Using a global ocean biogeochemistry model, we find that without climate change, the mean carbon uptake 2000–2019 would have been 13% higher and the trend 1958–2019 would have been 27% higher.

#climate #uöäü1sink
The Impact of Recent Climate Change on the Global Ocean Carbon Sink
Climate change reduced ocean CO2 uptake by 13% (2000–2019) primarily induced by wind-driven changes in dissolved inorganic carbon transport A feedback between the surface dissolved inorganic carb...
agupubs.onlinelibrary.wiley.com
December 8, 2024 at 2:44 PM
An important detail on ocean sink:

"La Niña enhances ocean CO2 outgassing (0.1–0.2 PgC/yr) with a broader poleward extension (15°S–15°N) for up to 3 years, while El Niño reduces outgassing (0.2–0.4 PgC/yr) with a narrower poleward extension (10°S–10°N) for up to 1 year."

#climate #uöäü1sink #ocean
Asymmetrical Ocean Carbon Responses in the Tropical Pacific Ocean to La Niña and El Niño
La Niña has a broader poleward extension and longer duration than El Niño in ocean carbon responses The ocean carbon anomaly shifts westward during La Niña and eastward during El Niño These asym...
agupubs.onlinelibrary.wiley.com
March 2, 2025 at 11:02 AM
Wrote a small text with additional references on the next sign that we could trigger a highly non-linear Earth system reaction:

Abrupt declines in soils moisture, weakening vegetation resilience, and accelerating sea surface temperatures

Synchronization of feedbacks...

#climate #uöäü1sink #Earth
Next sign that we could trigger a highly non-linear Earth system reaction
Soil moisture is a good proxy for relative humidity declines, higher summer temperatures, and exceptional droughts that are the root cause of extreme fire seasons. Thereby, soil moisture becomes one o...
www.linkedin.com
March 28, 2025 at 9:49 PM
A nice one showing of why the Amazon drying supports Amazon drying AND higher tropical sea surface temperatures

#Climate #Amazon #uöäü1sink

"A Simple Conceptual Model for the Heat Induced Circulation over Northern South America and Meso-America"; www.mdpi.com/2073-4433/11...
March 8, 2025 at 10:36 AM