Antarctic meltwater could dramatically slow overturning current

[Crick]

How many gigatons left?

Lots. No scientist has ever suggested that Antarctica could melt completely in less than several centuries. But we could all be in some shit long, long before that point from sea level rise.

 

[Toddsterpatriot]

Lots. No scientist has ever suggested that Antarctica could melt completely in less than several centuries. But we could all be in some shit long, long before that point from sea level rise.

Lots? That's some Nobel Prize winning precision. Thanks!

 

[Crick]

Lots? That's some Nobel Prize winning precision. Thanks!

For what did you need more precision? The data is available in a simple search.

 

[Toddsterpatriot]

For what did you need more precision?

To understand if 2000 gigatons is a large portion or a small portion of all the Antarctica ice mass.

The data is available in a simple search.

Thanks!

 

[EvilCat Breath]

Scientists paid to find global warming invariably find global warming. Grant and research money depend on it.

 

[Crick]

Scientists paid to find global warming invariably find global warming. Grant and research money depend on it.

And you think ALL of them are dishonest and have been for decades none of them has ever confessed to lying and no actual evidence of them lying has ever come forth. That is WICKED.

 

[Toddsterpatriot]

And you think ALL of them are dishonest and have been for decades none of them has ever confessed to lying and no actual evidence of them lying has ever come forth. That is WICKED.

None of them are ever dishonest.
Hiding the decline was perfectly honest.
Stopping opponents from publishing, perfectly fine.
No Nobel Prize winner ever lied or cheated.
No actual evidence anywhere.

 

[EvilCat Breath]

Lots. No scientist has ever suggested that Antarctica could melt completely in less than several centuries. But we could all be in some shit long, long before that point from sea level rise.

There will be no sea level rise. Global warming climate change is a total hoax.

 

[CrusaderFrank]

So, you have no familiarity at all with actual science. Got it.

Neither does assigning blame for melting ice on American CO2

 

[Crick]

Neither does assigning blame for melting ice on American CO2

I have never blamed any CO2 effect on American CO2. Of course, being a voter, I have far more influence here than I can bring to bear against China, India, Russia or Japan. But, we all do what we can. I post here, in case the Chinese are looking.

 

[miketx]

Just as fresh melt water in the Arctic is weakening the Atlantic Meridional Overturning Current (AMOC), Antarctic meltwater threatens the Antarctic Bottom Water (AABW) current. The globes various meridional overturning currents are responsible for an enormous amount of the nutrients and oxygen in the equatorial ocean and for transfer of cold water from the poles to the tropics. Their collapse would result in heating of the tropical oceans and loss of dissolved oxygen on which all marine animal life depends. Historically, these systems are very slow to respond and recover and these effects could last for centuries.

ABSTRACT
The abyssal ocean circulation is a key component of the global meridional overturning circulation, cycling heat, carbon, oxygen and nutrients throughout the world ocean1,2. The strongest historical trend observed in the abyssal ocean is warming at high southern latitudes2–4, yet it is unclear what processes have driven this warming, and whether this warming is linked to a slowdown in the ocean’s overturning circulation. Furthermore, attributing change to specific drivers is difficult owing to limited measurements, and because coupled climate models exhibit biases in the region5–7. In addition, future change remains uncertain, with the latest coordinated climate model projections not accounting for dynamic ice-sheet melt. Here we use a transient forced high-resolution coupled ocean–sea-ice model to show that under a high-emissions scenario, abyssal warming is set to accelerate over the next 30 years. We find that meltwater input around Antarctica drives a contraction of Antarctic Bottom Water (AABW), opening a pathway that allows warm Circumpolar Deep Water greater access to the continental shelf. The reduction in AABW formation results in warming and ageing of the abyssal ocean, consistent with recent measurements. In contrast, projected wind and thermal forcing has little impact on the properties, age and volume of AABW. These results highlight the critical importance of Antarctic meltwater in setting the abyssal ocean overturning, with implications for global ocean biogeochemistry and climate that could last for centuries.

Open access - no paywall

https://www.nature.com/articles/s41586-023-05762-w.epdf?sharing_token=-Uv6ck382-4igdiSTULUQ9RgN0jAjWel9jnR3ZoTv0N6Cb4xcqVX2aG3Xn7Rj30THD8-VYClPJdSBkh1jXIAyxhb-WZcGKeC9oHk4_wkXETW5fyBQkboXNYJL-39MFoNfPGCWylxhJ38AzatVN5gAKz_Aeg0xzKD_0FbFgJUECgSzld0tpjjd6oBaGLKPG3f5mw6EiiMddhZZzw5qTnDaQ%3D%3D&tracking_referrer=www.cnn.com

 

[Crick]

View attachment 776995

If you don't understand what I said, you can ask me to explain it in private. If not, I can do it here.

Like every other fluid, if you take some room temperature water and start to chill it, it shrinks; its density increases. Unlike almost every other fluid, though, when it begins to approach its freezing point, it turns it about due to the shape of its molecules, and starts to expand again. The greatest density for water occurs at 4C (about 40F). It has to get below 4C before it starts losing density and floats back up. Once it freezes, it becomes much lighter and really floats. Now the salt in seawater lowers its freezing point to -1.8C and the top several hundred feet of ocean has to get to that temperature before ice will start forming at the surface. The relatively warmer 4C water sinks to the bottom. If anyone ever asks you what is the temperature at the bottom of the ocean, you can pretty confidently reply "Why, 4C of course".

So, warm water from some northward current like the Gulfstream or the Kurushio pushes up near the poles. The weather is very cold up there and it chills the water. When it gets down near 4C, it starts to sink. A great deal of it will sink all the way to the bottom. Once it is there, it will find that more 4C water is coming down from above and it has to get out of the way. That bottom water eventually gets pushed towards the poles. It is very slow but very broad. And being as cold as it is, it is carrying about as much oxygen as water can carry. That oxygen is good for deepwater fish. And as it flows along it will pick up dissolved minerals and organics that have fallen to the bottom from dying phyoplankton and zooplankton. That will come in handy at the next phase. When this water reaches the equator, it runs into a mirror current coming from the other pole. When the two currents collide, they've got nowhere to go but up. They upwell at the equator bringing oxygen, minerals and organics that feed the plankton there. That plankton is the base of the food chain for all the marine life in the tropics.

So, in case you hadn't heard this, but when ice freezes, the salt is forced out - the ice is fresh water. And, in Antarctica, Greenland and anywhere that glaciers slide into the sea, that ice forms originally from snowfall and so, of course, is also fresh. So, what happens when a lot of that ice melts. Well, it starts diluting the salt water and that lowers its density. It will still hit maximum density before it freezes, but there will not be as large a density difference with deeper water and the flow of that thermohaline current will slow and could even stop.

Slow or stop that rich upwelling at the Equator and you will see massive losses of fish and marine life. This will lead to widespread population loss in the oceans and a significant loss of human food as well.

 

[EMH]

Scientists paid to find global warming invariably find global warming. Grant and research money depend on it.

More specifically, when data shows NO WARMING, they FUDGE the data to show "warming" that does not exist...

 

[EMH]

Antarctica is not losing ice, it has been gaining ice all throughout Algore's fraud.

And that is why there is NO OCEAN RISE...

 

[miketx]

If you don't understand what I said, you can ask me to explain it in private. If not, I can do it here.

Like every other fluid, if you take some room temperature water and start to chill it, it shrinks; its density increases. Unlike almost every other fluid, though, when it begins to approach its freezing point, it turns it about due to the shape of its molecules, and starts to expand again. The greatest density for water occurs at 4C (about 40F). It has to get below 4C before it starts losing density and floats back up. Once it freezes, it becomes much lighter and really floats. Now the salt in seawater lowers its freezing point to -1.8C and the top several hundred feet of ocean has to get to that temperature before ice will start forming at the surface. The relatively warmer 4C water sinks to the bottom. If anyone ever asks you what is the temperature at the bottom of the ocean, you can pretty confidently reply "Why, 4C of course".

So, warm water from some northward current like the Gulfstream or the Kurushio pushes up near the poles. The weather is very cold up there and it chills the water. When it gets down near 4C, it starts to sink. A great deal of it will sink all the way to the bottom. Once it is there, it will find that more 4C water is coming down from above and it has to get out of the way. That bottom water eventually gets pushed towards the poles. It is very slow but very broad. And being as cold as it is, it is carrying about as much oxygen as water can carry. That oxygen is good for deepwater fish. And as it flows along it will pick up dissolved minerals and organics that have fallen to the bottom from dying phyoplankton and zooplankton. That will come in handy at the next phase. When this water reaches the equator, it runs into a mirror current coming from the other pole. When the two currents collide, they've got nowhere to go but up. They upwell at the equator bringing oxygen, minerals and organics that feed the plankton there. That plankton is the base of the food chain for all the marine life in the tropics.

So, in case you hadn't heard this, but when ice freezes, the salt is forced out - the ice is fresh water. And, in Antarctica, Greenland and anywhere that glaciers slide into the sea, that ice forms originally from snowfall and so, of course, is also fresh. So, what happens when a lot of that ice melts. Well, it starts diluting the salt water and that lowers its density. It will still hit maximum density before it freezes, but there will not be as large a density difference with deeper water and the flow of that thermohaline current will slow and could even stop.

Slow or stop that rich upwelling at the Equator and you will see massive losses of fish and marine life. This will lead to widespread population loss in the oceans and a significant loss of human food as well.

Keep pretending liar. You got nothing.

 

[EMH]

There will be no sea level rise. Global warming climate change is a total hoax.

Try to phrase it correctly...


Climate change is about the position of land near the poles. Co2 does nothing.

It is a Co2 FRAUD, not a CLIMATE CHANGE fraud, since the climate does change and Co2 has absolutely nothing to do with it...

 

[Crick]

If you don't understand what I said, you can ask me to explain it in private. If not, I can do it here.

Like every other fluid, if you take some room temperature water and start to chill it, it shrinks; its density increases. Unlike almost every other fluid, though, when it begins to approach its freezing point, it turns it about due to the shape of its molecules, and starts to expand again. The greatest density for water occurs at 4C (about 40F). It has to get below 4C before it starts losing density and floats back up. Once it freezes, it becomes much lighter and really floats. Now the salt in seawater lowers its freezing point to -1.8C and the top several hundred feet of ocean has to get to that temperature before ice will start forming at the surface. The relatively warmer 4C water sinks to the bottom. If anyone ever asks you what is the temperature at the bottom of the ocean, you can pretty confidently reply "Why, 4C of course".

So, warm water from some northward current like the Gulfstream or the Kurushio pushes up near the poles. The weather is very cold up there and it chills the water. When it gets down near 4C, it starts to sink. A great deal of it will sink all the way to the bottom. Once it is there, it will find that more 4C water is coming down from above and it has to get out of the way. That bottom water eventually gets pushed towards the poles towards the equator. It is very slow but very broad. And being as cold as it is, it is carrying about as much oxygen as water can carry. That oxygen is good for deepwater fish. And as it flows along it will pick up dissolved minerals and organics that have fallen to the bottom from dying phyoplankton and zooplankton. That will come in handy at the next phase. When this water reaches the equator, it runs into a mirror current coming from the other pole. When the two currents collide, they've got nowhere to go but up. They upwell at the equator bringing oxygen, minerals and organics that feed the plankton there. That plankton is the base of the food chain for all the marine life in the tropics.

So, in case you hadn't heard this, but when ice freezes, the salt is forced out - the ice is fresh water. And, in Antarctica, Greenland and anywhere that glaciers slide into the sea, that ice forms originally from snowfall and so, of course, is also fresh. So, what happens when a lot of that ice melts. Well, it starts diluting the salt water and that lowers its density. It will still hit maximum density before it freezes, but there will not be as large a density difference with deeper water and the flow of that thermohaline current will slow and could even stop.

Slow or stop that rich upwelling at the Equator and you will see massive losses of fish and marine life. This will lead to widespread population loss in the oceans and a significant loss of human food as well.

My mistake.

 

[Crick]

I'm familiar with science too....You warmers don't have much of that at all, that why you need to scarmonger with vagaries and weasel words.

Okay. Let's have a look at the language used in a study on improving the efficiency of a diesel engine, just like the one in your pickup truck. They will examine by adding platinum to the glow plugs to act as an in-cylinder catalyst. Influence of the In-Cylinder Catalyst on the Aftertreatment Efficiency of a Diesel Engine

Due to their usage, especially in urban driving, passenger cars are characterized by small mileage between individual trips, so they often operate from a cold engine start and work at a low engine temperature, which leads to reduced catalytic reactor efficiency.

A lower level of the number of particles behind the DOC was observed, which may be the result of retaining large particles, as the exhaust aftertreatment system did not include a diesel particulate filter

The tests were carried out on an engine dynamometer, where the traffic conditions from the type-approval test carried out on a chassis dynamometer could be replicated.

In addition, it is possible to use such a solution retroactively in traditional vehicles powered by an internal combustion engine, which could result in an improvement in their emission class through what is called retrofitting.

This new emission norm is likely to come into force in 2025 and, fortunately, in a less restrictive form compared to the original assumptions, and these emission limits in the Euro 7 will not be lower than in the Euro 6e. Engines will have to comply with the emission norms at a cold start, during short periods of operation and in real operating conditions (in the RDE test [5]).

In addition, it is possible to use it in traditional, already operated vehicles powered by an internal combustion engine, which could result in an improvement in the emission class through so-called retrofitting.

No unequivocal effect of the type of catalytic coating on the value of the carbon monoxide concentration in the exhaust gas was observed, while an increase in the concentration of HC in most of the tested load ranges of up to 60% was found, as well as a decrease in the concentration of nitrogen oxides by about 30% and a decrease in the specific fuel consumption by about 15%.

However, it should be noted that an efficiency of 15–20% was still achieved, which was probably due to the proportion of quite large particles emitted by the engine, which were nevertheless retained by the DOC.

Based on European data (Figure 4), it appears that 45% of routes are shorter than 30 km, so the engine is underheated and the catalytic reactor is not fully operational, especially when stationary—therefore, it is possible to use engine and non-engine measures to reduce this phenomenon [12].

The lack of a ceramic layer made it possible to reduce the thermal insulation and, consequently, to heat up the glow plugs faster and increase the working temperature of the catalytic layer.

Hmm... looks pretty weasely, eh.

 

[Crick]

There will be no sea level rise. Global warming climate change is a total hoax.

You're just a wee bit late.

Seasonal (3-month) sea level estimates from Church and White (2011) (light blue line) and University of Hawaii Fast Delivery sea level data (dark blue). The values are shown as change in sea level in
millimeters compared to the 1993-2008 average. NOAA Climate.gov image based on analysis and data from Philip Thompson, University of Hawaii Sea Level Center.

Climate Change: Global Sea Level

Sea level has risen 8-9 inches since 1880, and the rate is accelerating thanks to glacier and ice sheet melt.

www.climate.gov

 

[EMH]

You're just a wee bit late.

Seasonal (3-month) sea level estimates from Church and White (2011) (light blue line) and University of Hawaii Fast Delivery sea level data (dark blue). The values are shown as change in sea level in
millimeters compared to the 1993-2008 average. NOAA Climate.gov image based on analysis and data from Philip Thompson, University of Hawaii Sea Level Center.

Climate Change: Global Sea Level

Sea level has risen 8-9 inches since 1880, and the rate is accelerating thanks to glacier and ice sheet melt.

www.climate.gov

Still waiting for


ONE SINGLE PHOTO


of a landmark on planet Earth that is sinking....




Statue of Liberty = nope
Venice = nope
Hawaii 5-0 beach = nope