Global fry-up.

Climate emissions shrinking the stratosphere, scientists reveal
Exclusive: Thinning indicates profound impact of humans and could affect satellites and GPS


Humanity’s enormous emissions of greenhouse gases are shrinking the stratosphere, a new study has revealed.

The thickness of the atmospheric layer has contracted by 400 metres since the 1980s, the researchers found, and will thin by about another kilometre by 2080 without major cuts in emissions. The changes have the potential to affect satellite operations, the GPS navigation system and radio communications.

The discovery is the latest to show the profound impact of humans on the planet. In April, scientists showed that the climate crisis had shifted the Earth’s axis as the massive melting of glaciers redistributes weight around the globe.

https://www.theguardian.com/environ...ns-shrinking-the-stratosphere-scientists-find


Greenhouse gas emissions are changing the structure of Earth’s lower atmosphere

The shrinking stratosphere is a stark signal of the climate emergency and the planetary-scale influence that humanity now exerts, according to Juan Añel, at the University of Vigo, Ourense in Spain and part of the research team. “It is shocking,” he said. “This proves we are messing with the atmosphere up to 60 kilometres.”

Scientists already knew the troposphere was growing in height as carbon emissions rose and had hypothesised that the stratosphere was shrinking. But the new study is the first to demonstrate this and shows it has been contracting around the globe since at least the 1980s, when satellite data was first gathered.

https://www.theguardian.com/environ...ns-shrinking-the-stratosphere-scientists-find
 
It occurs to me that it isn't plain ignorance which prevents people from promoting caution with regard to global warming- it's fear.
 
Climate tipping points could topple like dominoes, warn scientists
Analysis shows significant risk of cascading events even at 2C of heating, with severe long-term effects


Ice sheets and ocean currents at risk of climate tipping points can destabilise each other as the world heats up, leading to a domino effect with severe consequences for humanity, according to a risk analysis.


Tipping points occur when global heating pushes temperatures beyond a critical threshold, leading to accelerated and irreversible impacts. Some large ice sheets in Antarctica are thought to already have passed their tipping points, meaning large sea-level rises in coming centuries.

The new research examined the interactions between ice sheets in West Antarctica, Greenland, the warm Atlantic Gulf Stream and the Amazon rainforest. The scientists carried out 3m computer simulations and found domino effects in a third of them, even when temperature rises were below 2C, the upper limit of the Paris agreement.

The study showed that the interactions between these climate systems can lower the critical temperature thresholds at which each tipping point is passed. It found that ice sheets are potential starting points for tipping cascades, with the Atlantic currents acting as a transmitter and eventually affecting the Amazon.

“We provide a risk analysis, not a prediction, but our findings still raise concern,” said Prof Ricarda Winkelmann, at the Potsdam Institute for Climate Impact Research (PIK) in Germany. “[Our findings] might mean we have less time to reduce greenhouse gas emissions and still prevent tipping processes.”

https://www.theguardian.com/environ...ts-could-topple-like-dominoes-warn-scientists
 
Climate tipping points could topple like dominoes, warn scientists
Analysis shows significant risk of cascading events even at 2C of heating, with severe long-term effects


Ice sheets and ocean currents at risk of climate tipping points can destabilise each other as the world heats up, leading to a domino effect with severe consequences for humanity, according to a risk analysis.


Tipping points occur when global heating pushes temperatures beyond a critical threshold, leading to accelerated and irreversible impacts. Some large ice sheets in Antarctica are thought to already have passed their tipping points, meaning large sea-level rises in coming centuries.

The new research examined the interactions between ice sheets in West Antarctica, Greenland, the warm Atlantic Gulf Stream and the Amazon rainforest. The scientists carried out 3m computer simulations and found domino effects in a third of them, even when temperature rises were below 2C, the upper limit of the Paris agreement.

The study showed that the interactions between these climate systems can lower the critical temperature thresholds at which each tipping point is passed. It found that ice sheets are potential starting points for tipping cascades, with the Atlantic currents acting as a transmitter and eventually affecting the Amazon.

“We provide a risk analysis, not a prediction, but our findings still raise concern,” said Prof Ricarda Winkelmann, at the Potsdam Institute for Climate Impact Research (PIK) in Germany. “[Our findings] might mean we have less time to reduce greenhouse gas emissions and still prevent tipping processes.”

https://www.theguardian.com/environ...ts-could-topple-like-dominoes-warn-scientists

Carrington again, that guy is a fucking arsehole.
 
Clouds could have a greater cooling effect on the planet than climate models currently suggest, according to new research.

The paper, published in Nature Climate Change, aims to correct a “long-standing” and “unaddressed” problem in climate modelling – namely, that existing models simulate too much rainfall from clouds and, therefore, underestimate their lifespan and cooling effect.

The authors have updated an existing climate model with a more realistic simulation of rainfall from “warm” clouds – those that contain water only, rather than a combination of water and ice. They find that this update makes the “cloud lifetime feedback” – a process in which warmer temperatures increase the lifespan of clouds – almost three times bigger.

The authors note that the newest generation of global climate models – the 6th Coupled Model Intercomparison Project (CMIP6) – predicts faster future warming than its predecessors. This is largely because the new models simulate a smaller cooling effect from clouds.

However, the lead author of the study tells Carbon Brief that fixing the “problem” in rainfall simulations “reduces the amount of warming predicted by the model, by about the same amount as the warming increase between CMIP5 and CMIP6”.

Due to this, he says that the key takeaway from the study is to “take the extra warming in CMIP6 with a grain of salt until some of the other known cloud problems are also fixed in the models”.


An underestimated negative cloud feedback from cloud lifetime changes


Nature Climate Change volume 11, pages508–513 (2021)

Abstract
As the atmosphere warms, part of the cloud population shifts from ice and mixed-phase (‘cold’) to liquid (‘warm’) clouds. Because warm clouds are more reflective and longer-lived, this phase change reduces the solar flux absorbed by the Earth and constitutes a negative radiative feedback. This cooling feedback is weaker in the sixth phase of the Coupled Model Intercomparison Project (CMIP6) than in the fifth phase (CMIP5), contributing to greater greenhouse warming. Although this change is often attributed to improvements in the simulated cloud phase, another model bias persists: warm clouds precipitate too readily, potentially leading to underestimated negative lifetime feedbacks. In this study we modified a climate model to better simulate warm-rain probability and found that it exhibits a cloud lifetime feedback nearly three times larger than the default model. This suggests that model errors in cloud-precipitation processes may bias cloud feedbacks by as much as the CMIP5-to-CMIP6 climate sensitivity difference. Reliable climate model projections therefore require improved cloud process realism guided by process-oriented observations and observational constraints.

https://www.nature.com/articles/s41558-021-01038-1
 
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Carrington again, that guy is a fucking arsehole.

Have you seen the phrase ' melting twice as fast ' all over the world headlines today, maggot ? Maybe you're too busy reading the insides of your sphincter.


Haw, haw....................................haw.
 
Clouds could have a greater cooling effect on the planet than climate models currently suggest, according to new research.
Clouds do not have the capability too destroy energy.
The paper, published in Nature Climate Change, aims to correct a “long-standing” and “unaddressed” problem in climate modelling – namely, that existing models simulate too much rainfall from clouds and, therefore, underestimate their lifespan and cooling effect.

The authors have updated an existing climate model with a more realistic simulation of rainfall from “warm” clouds – those that contain water only, rather than a combination of water and ice. They find that this update makes the “cloud lifetime feedback” – a process in which warmer temperatures increase the lifespan of clouds – almost three times bigger.

The authors note that the newest generation of global climate models – the 6th Coupled Model Intercomparison Project (CMIP6) – predicts faster future warming than its predecessors. This is largely because the new models simulate a smaller cooling effect from clouds.

However, the lead author of the study tells Carbon Brief that fixing the “problem” in rainfall simulations “reduces the amount of warming predicted by the model, by about the same amount as the warming increase between CMIP5 and CMIP6”.

Due to this, he says that the key takeaway from the study is to “take the extra warming in CMIP6 with a grain of salt until some of the other known cloud problems are also fixed in the models”.


An underestimated negative cloud feedback from cloud lifetime changes


Nature Climate Change volume 11, pages508–513 (2021)
Computer models of climate are nothing more than random number generators of type randU. Random numbers are not data.
Abstract
As the atmosphere warms, part of the cloud population shifts from ice and mixed-phase (‘cold’) to liquid (‘warm’) clouds. Because warm clouds are more reflective and longer-lived, this phase change reduces the solar flux absorbed by the Earth and constitutes a negative radiative feedback. This cooling feedback is weaker in the sixth phase of the Coupled Model Intercomparison Project (CMIP6) than in the fifth phase (CMIP5), contributing to greater greenhouse warming. Although this change is often attributed to improvements in the simulated cloud phase, another model bias persists: warm clouds precipitate too readily, potentially leading to underestimated negative lifetime feedbacks. In this study we modified a climate model to better simulate warm-rain probability and found that it exhibits a cloud lifetime feedback nearly three times larger than the default model. This suggests that model errors in cloud-precipitation processes may bias cloud feedbacks by as much as the CMIP5-to-CMIP6 climate sensitivity difference. Reliable climate model projections therefore require improved cloud process realism guided by process-oriented observations and observational constraints.

https://www.nature.com/articles/s41558-021-01038-1
The emissivity of any given cloud is unknown. The size of a cloud constantly changes. The total cloud cover of Earth is unknown. None of it can be measured. Argument from randU fallacy.

There is no such thing as 'feedback' here. Neither clouds nor CO2 are energy. It is not possible to create or destroy energy.
 
Have you seen the phrase ' melting twice as fast ' all over the world headlines today, maggot ? Maybe you're too busy reading the insides of your sphincter.


Haw, haw....................................haw.

Newspapers are not a proof. It is not possible to measure the total snow and ice on Earth.
 
Into the Night Soil
200w.webp


Newspapers are not a proof. It is not possible to measure the total snow and ice on Earth.

Perhaps not in your world- but then, in your world you know what you're talking about.
 
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