Climate Change News collection

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he focused on issues that actually matter and over which we have considerable control: protecting the nation’s water infrastructure, conservation of land, water, and wildlife, improving forest health and, of course, economic prosperity, the linchpin on which all the rest is founded. After all, without prosperity, we cannot afford to protect the environment. Trump explained in his official Earth Day statement:
 
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Theo520:
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LeafByNiggle:
It is not such a done-deal as you might imagine. Read here .
I think your link argues that reconstructions are good science, not that Mann’s was without error.
All models and reconstructions have errors. Mann’s “hockey stick” has errors, and some subsequent reconstructions are better. But they are not substantial errors that would undermine the general conclusions draw from that reconstruction.
Especially when the “general conclusions” are known to be true a priori and independently of the models but then the validity of the models can be determined by their ability to corroborate those “general conclusions.” In any other instance that would be known as begging the question, but not where 97% of scientists just know those “general conclusions” happen to be true and build their models to align with those conclusions.
 
Especially when the “general conclusions” are known to be true a priori and independently of the models but then the validity of the models can be determined by their ability to corroborate those “general conclusions.”
I assume he’s referring to the general conclusion that temps are rising with the start of the industrial age. But it’s clearly wrong to draw the conclusion that the IA is the cause, since it also coincides with the end of our little ice age.

No, a reconstruction does not prove that man is the cause of current warming. Reconstructions show past warming was not caused by man and they lack sufficient fidelity to show precise rate of changes for past warming and cooling periods.
 
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HarryStotle:
Especially when the “general conclusions” are known to be true a priori and independently of the models but then the validity of the models can be determined by their ability to corroborate those “general conclusions.”
I assume he’s referring to the general conclusion that temps are rising with the start of the industrial age. But it’s clearly wrong to draw the conclusion that the IA is the cause, since it also coincides with the end of our little ice age.
The “little ice age” is a name given to a period of time in which temperatures were observed to be much lower than before or after that period. The fact that it has a name does not mean the effect it describes is understood. It is not like the term “winter” which stands for a period of time in which the temperatures are colder and we know why, because of the tilt of the earth’s axis. So we can properly say that the warming we see in spring is “because of” the end of winter. No such situation exists with the little ice age. It is named because it happened. It did not happen because we understood why it had to happen and then named it. So it makes no sense to say that it is warmer now “because of” the ending of the little ice age. Rather it is the other way around. The little ice age is said to have ended because of the rising of temperatures.
No, a reconstruction does not prove that man is the cause of current warming.
No one fact proves man is the cause of current warming. But reconstructions of prehistoric temperatures do lend support to the theory, which is all any scientific theory can hope for.
Reconstructions show past warming was not caused by man…
Which is fine, because no one is claiming all warming is caused by man.
and they lack sufficient fidelity to show precise rate of changes for past warming and cooling periods.
Experts say it does offer sufficient fidelity to show that current rates of warming are unprecedented.
 
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HarryStotle:
Especially when the “general conclusions” are known to be true a priori and independently of the models but then the validity of the models can be determined by their ability to corroborate those “general conclusions.”
I assume he’s referring to the general conclusion that temps are rising with the start of the industrial age. But it’s clearly wrong to draw the conclusion that the IA is the cause, since it also coincides with the end of our little ice age.
That conclusion wouldn’t be sufficiently “general,” though, as a conclusion, because the supposed rise in temperatures could be attributed to other factors. The conclusion behind the conclusion, so to speak, was predetermined as human caused warming. Owing to that a priori conclusion, temperature data from the 1930s had to be “adjusted” downwards and temperatures in the 1970s – when scientists were calling for catastrophic cooling of the climate – had to be adjusted upwards so as to make the “general conclusion” indisputable.
 
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Theo520:
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HarryStotle:
Especially when the “general conclusions” are known to be true a priori and independently of the models but then the validity of the models can be determined by their ability to corroborate those “general conclusions.”
I assume he’s referring to the general conclusion that temps are rising with the start of the industrial age. But it’s clearly wrong to draw the conclusion that the IA is the cause, since it also coincides with the end of our little ice age.
That conclusion wouldn’t be sufficiently “general,” though, as a conclusion, because the supposed rise in temperatures could be attributed to other factors. The conclusion behind the conclusion, so to speak, was predetermined as human caused warming. Owing to that a priori conclusion, temperature data from the 1930s had to be “adjusted” downwards and temperatures in the 1970s…
That was not the reason for the adjustments, conspiracy theories not withstanding.
 
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HarryStotle:
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Theo520:
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HarryStotle:
Especially when the “general conclusions” are known to be true a priori and independently of the models but then the validity of the models can be determined by their ability to corroborate those “general conclusions.”
I assume he’s referring to the general conclusion that temps are rising with the start of the industrial age. But it’s clearly wrong to draw the conclusion that the IA is the cause, since it also coincides with the end of our little ice age.
That conclusion wouldn’t be sufficiently “general,” though, as a conclusion, because the supposed rise in temperatures could be attributed to other factors. The conclusion behind the conclusion, so to speak, was predetermined as human caused warming. Owing to that a priori conclusion, temperature data from the 1930s had to be “adjusted” downwards and temperatures in the 1970s…
That was not the reason for the adjustments, conspiracy theories not withstanding.
Of course that isn’t the stated reason, just a convenient outcome.

Climategate suggests a conspiracy, of sorts. As does Mann’s behaviour.

Call me a cynic, but when I see the entire cast reading from the same script, looking down their noses and casting into the outer darkness anyone who happens to be a critic, I begin to suspect auditions, casting, orchestration, payola, and production.
 
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LeafByNiggle:
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HarryStotle:
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Theo520:
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HarryStotle:
Especially when the “general conclusions” are known to be true a priori and independently of the models but then the validity of the models can be determined by their ability to corroborate those “general conclusions.”
I assume he’s referring to the general conclusion that temps are rising with the start of the industrial age. But it’s clearly wrong to draw the conclusion that the IA is the cause, since it also coincides with the end of our little ice age.
That conclusion wouldn’t be sufficiently “general,” though, as a conclusion, because the supposed rise in temperatures could be attributed to other factors. The conclusion behind the conclusion, so to speak, was predetermined as human caused warming. Owing to that a priori conclusion, temperature data from the 1930s had to be “adjusted” downwards and temperatures in the 1970s…
That was not the reason for the adjustments, conspiracy theories not withstanding.
Of course that isn’t the stated reason, just a convenient outcome.

Climategate suggests a conspiracy, of sorts.
…right on cue, as expected. Here come the conspiracy theories.
 
Greenland Is Falling Apart
This is precisely the type of global warming alarmism one has come to expect from the media, and underneath it are “scientific” statements that are just as bad. The paper presented in the prestigious Proceedings of the National Academy of the Sciences studied the ice lost in Greenland:

We reconstruct the mass balance of the Greenland Ice Sheet using a comprehensive survey of thickness, surface elevation, velocity, and surface mass balance (SMB) of 260 glaciers from 1972 to 2018.

Keep that in mind: they studied how much ice was lost in Greenland and the rates over time. Despite evaluating only what happened, the paper ended by asserting why it happened: global warming. That is, they studied an effect and intuited the cause. This is not science.

The evolution of NO and NE glaciers in the coming decades is therefore of greatest relevance to future sea level change as the ice shelves are weakened by climate change.
 
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Victoria33:
Greenland Is Falling Apart
This is precisely the type of global warming alarmism one has come to expect from the media, and underneath it are “scientific” statements that are just as bad. The paper presented in the prestigious Proceedings of the National Academy of the Sciences studied the ice lost in Greenland:

We reconstruct the mass balance of the Greenland Ice Sheet using a comprehensive survey of thickness, surface elevation, velocity, and surface mass balance (SMB) of 260 glaciers from 1972 to 2018.

Keep that in mind: they studied how much ice was lost in Greenland and the rates over time. Despite evaluating only what happened, the paper ended by asserting why it happened: global warming. That is, they studied an effect and intuited the cause. This is not science.

The evolution of NO and NE glaciers in the coming decades is therefore of greatest relevance to future sea level change as the ice shelves are weakened by climate change.
The paper made no claims that their research supported global warming. They only referred to it in passing as it is a commonly accepted fact by the scientific community, Anthony Watts not withstanding. Not every paper that mentions global warming has to rehash to whole thing, especially if it is not the thrust of the research of the paper, which was excellent.
 
The paper made no claims that their research supported global warming.
Exactly. There was nothing whatever in their work that even addressed the possible causes of ice loss in Greenland, yet they threw out the conclusion that it was due to climate change.
They only referred to it in passing as it is a commonly accepted fact by the scientific community…
The only “fact” here is that there are people in the scientific community who believe it. To assert as a fact something that wasn’t even studied is grossly inappropriate.
 
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LeafByNiggle:
The paper made no claims that their research supported global warming.
Exactly. There was nothing whatever in their work that even addressed the possible causes of ice loss in Greenland, yet they threw out the conclusion that it was due to climate change.
It doesn’t take a great scientific mind to say that ice melts when it gets warmer.
They only referred to it in passing as it is a commonly accepted fact by the scientific community…
The only “fact” here is that there are people in the scientific community who believe it. To assert as a fact something that wasn’t even studied is grossly inappropriate.
No, the climate is warming. That is a fact. There is less certainty about the cause, but the effect is a fact.
 
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