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# Projections of sea level are underestimated

## 108 posts in this topic

Little Fish - there is no 15 year flat period. Starting from a faulty premise derived from cherry picking invalidates your argument before it begins.

Would you concede that if you start or finish the analysis 2 years either side of your arbitrary start and end points the argument collapses.

Br Cornelius

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please refer to my last post to understand why you misrepresent and miss the point.

Your point is meaningless as it is based on an arbitrary statistical analysis derived from cherry picking start and end points. it is not statistically valid to start your running mean at the arbitrary date of 1998.

You have no argument to disagree with.

Br Cornelius

Edited by Br Cornelius

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You say I don't know the difference between weather and climate, but yet these alarmists use every single major weather event anywhere in the world as further 'proof' of climate change.

"Alarmists do. Scientists don't. Most weather is just that - weather - and not indicative of climate change. You have to have a whole bunch of weather events extending over many years before you have evidence of climate change. "Climate" is measured using averages; it takes mulitple events to calculate an average.

It's essentially impossible to find a global average as it is.

Correct. And that's the reason that climate changes are published in the form of global climate anomalies, rather than global average temperatures (Of course, you already knew that.). Getting the global surface temperature closer than about 0.1 degrees C. is a near-impossibility, anyway, but in case you'd like to do the math, the NCDC list has a formula. But changes in temperature are much easier because you don't have the problem of figuring out how accurate the observer was back in 1886.

The margins of error of the weather-instruments themselves are greater than the differences these charts purport to show.

The accuracy of globally-averaged temperature anomalies on a yearly basis is about 0.07 degrees C. If the change is not at least this big, you can't say there's a difference. But if you wait a few years, the difference increases; then you can calculate the mean annual increment - even if it's less than 0.07 degrees.

And that's not even accounting for non-sampling errors, such as the locations of the instruments themselves being altered, for example from shady woodland to open tarmac, or new technology implemented over time.

First, there are standard protocols for the siting of weather instruments. The station must be in an open area and away from things like tarmac and buildings - I don't remember the exact distance, but it's about 100 feet or so. Grass is the preferred ground cover - no trees. Ever try to measure light energy with a tree overhead?

Second, it takes three years of data from BOTH stations to calculate the corrections applicable to the new station. I have just exactly the problem you describe with my oldest station (Dallas, Arkansas). It was shut down in December 1905 when the new station (Mena, Arkansas) had been in operation only eight months. Thus, my oldest six years of data cannot be correlated with anything else and are the next best thing to useless. When you have the data to do it, you can calculate a set of "dummy variables" that can be used to place the two datasets on the same basis.

Even NASA admits that all satellite data relating to sea-level rise cannot be taken as precise measurements. Even that data is in question, so is any model that uses it as a base.

The issue is not precision. It is accuracy.

I think your problem is that you are reading material written by people who don't really know anything about climate and taking that as gospel. Just because soebody puts it in your local newspaper or on the Intrenet doesn't mean it's true.

Then Mann tries to use tree rings (3 to be precise) to show absolute precision?

I am not familiar with a paper in which Mann tried to do this. Would you please post the reference?

On the subject of Mann: he currently has the dendrochronology community up in arms over a misreading of chronologies he used for a paper in Nature last spring. Seems he over-estimated the temperatures in northern Scandinavia and then tried to claim that there were no missing rings in the datasets. That has the original authors ready to string him up. A rebuttal will be published in a couple months.

And now the new fad is using stalactites as measurements of historical climate? What world is this?

I don't know how you define "new," but the technique was used by Doehle back in 2004. I'd like to cross-date a stalactite chronology with a tree-ring one just to see how they compare.

Which of course makes the entire process laughable from the very start. Then they compare these fractions of a degree going back hundreds and even thousands of years as if they have all this data for certain. Ultimately, they can make the data say anything, because the data itself is such a mess that it can be produced to say anything they need.

I think you have just demonstrated what you know about the process.

Informed criticism helps make the process better. Unsupported drivel doesn't. If you think you have found a mistake (It happens.), point it out to the journal and to the author. If you have something, it will likely get published. If it doesn't come up to the level of a paper, do a poster at a professional conference, or host a discussion group on the topic. That's how the divergeance problem was brought out. One scared graduate student found a missing ring in a standard reference chronology that had been in use for many years. He took it to the author who confirmed it and published a corrected version with the graduate student as a co-author. Catching a mistake can enhance your prestige.

Doug

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I'll repeat it a fourth time for your understanding - NOAA states that the gcm climate models (used by the ipcc to frighten the gullible) RULE OUT a period of 15 years with a flat trend. I'll say it differently - if there is an observed flat trend for 15 continuous years then the gcm model are exaggerating the effects of co2 - the gcm models do not show flat periods of 15 years in their runs, there has to be a rise over all and any 15 year periods or the models are misunderstanding carbon dioxide. so there is no cherry picking, NOAA stated in 2008 you just have to find a 15 year period of flat trend in the observations to throw out the models. the question is not what you are implying, the question NOAA answered in 2008 is, how many years of non rising temperatures are required to falsify the models' predictions, their answer was 15 years.

The rub is that you have not demonstarted the existence of a fifteen-year period with zero slope. You lack the data, the model and the method.

Doug

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Your point is meaningless as it is based on an arbitrary statistical analysis derived from cherry picking start and end points. it is not statistically valid to start your running mean at the arbitrary date of 1998.

You have no argument to disagree with.

Br Cornelius

so you are saying that the top climate modelers and NOAA's point is meaningless?

both you and doug are so obsessed with bringing down a little fish, you've lost sight of whose point it actually is.

http://www.unexplain...45#entry4568205

http://www.unexplain...30#entry4568078

data, the model and the method.
hadcrut3, least squares linear regression trend, 1997-present.

Edited by Little Fish

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Littler Fish your point is invalid because you have abused standard statistical methods to make it. You do not understand the purpose of stats so you do not know how to use them. I repeat "There has been no 15 years flat line in temperature, it is a statistical artifact produced by cherry picking start and end point of a data series"

You really should be ashamed to use such cheap tricks, but I suspect you don't even understand what you have done since you are parroting Anthony Watts and his cronies. Even worse would be if you do understand what you are doing because that would show your dishonesty.

Br Cornelius

Edited by Br Cornelius

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doug's an obfuscator. I don't have the time.

I am trying to get you to do some studying about climate change and science and how these findings are done so that you don't come on here and just sound stupid. I see it is not working.

only by deleting part of the data are you able to claim there is a rising trend over the last 15 years.

Why did you delete the 1977-1997 data, if not to obscure the fact that temperatures are rising?

I never said the trend has slowed, I said the trend has been zero. and CRUTEM3 as well as RSS show a flat trend over the last 15 years. if the trend was positive and statistically significant, then all the datasets would show it. I'm just looking at the data, you are denying and ignoring part of the data. you have to deny the trend has been flat for 15 years, because to accept it would mean letting go of your fear mongering predictions.

Statistically, you cannot produce a valid trend line with less than 30 observations without going through a whole lot of complex calculations, which you have not done. You have posted no evidence of a zero temperature coefficient. You do not have a case and just saying so again doesn't change the fact.

Doug

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I am trying to get you to do some studying about climate change and science and how these findings are done so that you don't come on here and just sound stupid. I see it is not working.

behave.
Why did you delete the 1977-1997 data, if not to obscure the fact that temperatures are rising?
if I want to calculate the trend for the last 15 years, then I do not need the data from years previous to those 15. all I need is the data for the last 15 years, and I should not throw away any data as a declared "outlier". to throw away the el nino and not throw away the la nina's and el ninos that followed is fraudulent, so we should use all the data over the last 15 years.

I have explained the point to you SIX times now as to why we should look at 15 years of data. here for the 7th time - a flat trend of 15 years falsifies the gcms - that is what the gcm modelers and NOAA stated in 2008 - in order to assert that co2 is a scary life threatening primary climate driving gas that the gcms animate it as, the temperature trend will always show a rise over any 15 year period - their words, not mine.

Statistically, you cannot produce a valid trend line with less than 30 observations without...<and other nonsense>
the main temperature dataset used by the IPCC, HADCRUT3 and used in the graphs I showed is a monthly dataset, so 15 years of data contain 180 data points. the trend over the last 15 years is flat as I already showed you.

no global warming for fifteen years falsifies the famous fear flooding fanatical fatalists fantastical fantasies.

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You really just don't understand the concept of stats or trends do you Little Fish. If you want to draw a meaningless conclusion then calculate the trend your way. You ask us not to ignore the El Nino (which we have not be the way) but then ask us to ignore all the valid data before 1997.

Are you for real. Do you understand how inconsistent your arguments are ?

The great architect must have sent you for comic relief in desperate times .

Br Cornelius

Edited by Br Cornelius

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You really just don't understand the concept of stats or trends do you

Maybe, but neither does the average person. Those of us that try and come to the truth of the matter see conflicting reports from various sources and we have to come to our own conclusions. We can see the contradictions and why should we take your word for it?

I've been an environmentalist, or tree hugger if you will, all of my life and I have a difficult time believing this isn't a natural earth cycle. It may be eccelerated by a hundred years, but it's still coming...with or without us.

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Maybe, but neither does the average person. Those of us that try and come to the truth of the matter see conflicting reports from various sources and we have to come to our own conclusions. We can see the contradictions and why should we take your word for it?

I've been an environmentalist, or tree hugger if you will, all of my life and I have a difficult time believing this isn't a natural earth cycle. It may be eccelerated by a hundred years, but it's still coming...with or without us.

The point about ignorance of the complex subject of stats is not that we should all be capable of understanding them (I have only a tenuous grasp of the finer points of stats) but that we should understand our limits and defer to people who are experts who do understand them. The cult of the amateur expert who is capable of slaying established experts with a cursory glance over some internet blogs is frankly insulting.

Your assertion of the dominance of natural cycles seems to be purely a matter of belief, which of course you are entitled to, but until you present robust evidence to counter the science of AGW it will remain an unsupported belief.

It is not as if you have a whole heap of credible climate scientists who agree with you here. its not about been a tree hugger, its about credible evidence and well supported arguments.

-------------

Dr Richard Muller has this to say about what Little Fish is attempting to perpetrate in this thread;

“That’s incorrect...I mean, what they have done is an old trick. It’s how to lie with statistics, right? And scientists can’t do that because 10 years from now, they’ll look back on my publications and say, ‘Was he right?’ But a journalist can lie with statistics. They can choose a little piece of the data and prove what they want, carefully cutting out the end. If I wanted to do this, I could demonstrate, for example, with the same data set that from 1980 to 1995 that it’s equally flat. You can find little realms where it’s equally flat. What that tells me is that 15 years is not enough to be able to tell whether it’s warming or not. And so when they take 13 years, and they say based on that they can reach a conclusion based on our data set, I think they’re playing that same game and the fact that we can find that back in 1980, the same effect, when we know it [was] warming simply shows that that method doesn’t work. But no scientist could do that because he’d be discredited for lying with statistics. Newspapers can do that because 10 years from now, nobody will remember that they showed that.”

We have a trained environmental statistician here on this discussion who is calling Little Fishes bluff - who would you believe.

Br Cornelius

Edited by Br Cornelius

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That seems to be purely a matter of belief which of course you are entitled to, but until you present robust evidence to counter the science of AGW it will remain an unsupported belief.

And you can disregard thousands of years of weather patterns.

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And you can disregard thousands of years of weather patterns.

Climate always has drivers - mainly external but on a geological time scale continental drift plays a significant part. The science of climate is all about understanding those external and internal forcings and then applying them to understanding what is going on now and into the future.

CO2 is the only variable known to plug the gap between natural forcings and the observed climate trend. It is not acceptable to invoke some mysterious hidden variable without having a testable description of what it actually is. CO2 is a well understood physical phenomenon which has been demonstrated to have a significant influence within the paloclimatic record and so its use as a mechanism to explain current warming is an extrapolation from evidence.

Br Cornelius

Edited by Br Cornelius

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if I want to calculate the trend for the last 15 years, then I do not need the data from years previous to those 15. all I need is the data for the last 15 years, and I should not throw away any data as a declared "outlier". to throw away the el nino and not throw away the la nina's and el ninos that followed is fraudulent, so we should use all the data over the last 15 years.

But you still need 30 data points to calculate a statistically valid trend. With 15, you have a skewed result. Climate data is an autocorrelated time series - last year's data point is a better-than-average estimate of this year's. It lacks independence and because of that, a whole lot of calculating is needed to make the corrections. I just finished doing that with 482 tree ring series. It's a pain and I can understand why you don't want to do it. But if you want a relaiable result, you don't have a choice.

One other problem: a trend is a point-value. It only describes the rate of change at one point in time. The trend could change five minutes after you measured it. It could have been different (and probably was) seconds earlier. So even if you have one, it's not of much use.

I have explained the point to you SIX times now as to why we should look at 15 years of data. here for the 7th time - a flat trend of 15 years falsifies the gcms - that is what the gcm modelers and NOAA stated in 2008 - in order to assert that co2 is a scary life threatening primary climate driving gas that the gcms animate it as, the temperature trend will always show a rise over any 15 year period - their words, not mine.

Saying it again doesn't change the fact that your math is all screwed up.

the main temperature dataset used by the IPCC, HADCRUT3 and used in the graphs I showed is a monthly dataset, so 15 years of data contain 180 data points. the trend over the last 15 years is flat as I already showed you.

So now you've decided to introduce another set of variables to the problem. The problem that you're up against here is that by using monthly values, you have added a lot of variability to your dataset. And that widens your confidence interval. What you are tring to do is prove that the rate of slope is zero. But with a wide confidence interval, you can't disprove values that differ widely from zero. You have accomplished nothing.

BUT: By adding twelve dummy variables (one for each month) to the model, you can improve your accuracy considerably. That will give you 180-13=167 degrees of freedom. That should be enough. Did you do the math? What did it show?

no global warming for fifteen years falsifies the famous fear flooding fanatical fatalists fantastical fantasies.

You haven't disproven global warming during the 15 years in question, yet, but I'm anxious to see how you modeled the months. You might actually succeed. Time to show your work.

Doug

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You haven't disproven global warming during the 15 years in question

what I have proven is your (and cornelius') willfully inability to understand what the point is.

never did i say or mean "i have disproven global warming".

go back and read my posts, or shall i explain the point for an 8th time?

what did the modelers and NOAA say was the benchmark to show a discrepancy in the gcm models?

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If they demand a graph going back to the 1970s, here's one (taken from NOAA satellite data compiled by Roy Spencer). Not that it matters in the end, because this one will just be poo-pooed too. I think very few sceptics would deny that there was general warming from the 1970s into the 2000s, but of course, it just leads to the old question: is it from AGW or just natural fluctuations of the Earth's climate?

According to the AGW hypothesis, If increasing CO2 is the main driver of temperature, there should be a very clear upward trend line because CO2 in the atmosphere has been accelerating year upon year without slowing down. But they've probably figured out a way now to get around that little problem too. After all, they get to have their cake and eat it too, as I've been told.

The point about ignorance of the complex subject of stats is not that we should all be capable of understanding them (I have only a tenuous grasp of the finer points of stats) but that we should understand our limits and defer to people who are experts who do understand them. The cult of the amateur expert who is capable of slaying established experts with a cursory glance over some internet blogs is frankly insulting.

I don't personally believe this. We should not defer to experts simply because they are, or claim to be, experts. That's the same as listening to a priest because they studied theology and claim to be in closer communion with God. If the expert is wrong, it is okay for even a child to point it out. In the end, the expert always has to be held accountable.

You laugh at amateur internet scientists, but I would laugh in the face of any professional scientist who tries to use the word consensus to say that the science is settled. To me these scientists are worse than the amateurs who are trying to understand the science and the facts and are pointing out problems with the data. The scientists should be delighted that discrepencies have been found and that there are questions still to be answered.

They shouldn't be trying to ignore or belittle sceptics who have shown a greater ability to engage in real science. Science isn't about being an expert who blindly studied in university anyways. An amateur can be more of a scientist than the professional, if the amateur follows the scientific method more thoroughly than the expert.

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what I have proven is your (and cornelius') willfully inability to understand what the point is.

never did i say or mean "i have disproven global warming".

go back and read my posts, or shall i explain the point for an 8th time?

what did the modelers and NOAA say was the benchmark to show a discrepancy in the gcm models?

Your basic premise is wrong (that you can cut out a short time series and analyse it) and so the conclusion you have attempted to draw is equally wrong. You have no argument and you either cannot see it or are been willfully ignorant.

Br Cornelius

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If they demand a graph going back to the 1970s, here's one (taken from NOAA satellite data compiled by Roy Spencer). Not that it matters in the end, because this one will just be poo-pooed too. I think very few sceptics would deny that there was general warming from the 1970s into the 2000s, but of course, it just leads to the old question: is it from AGW or just natural fluctuations of the Earth's climate?

According to the AGW hypothesis, If increasing CO2 is the main driver of temperature, there should be a very clear upward trend line because CO2 in the atmosphere has been accelerating year upon year without slowing down. But they've probably figured out a way now to get around that little problem too. After all, they get to have their cake and eat it too, as I've been told.

I don't personally believe this. We should not defer to experts simply because they are, or claim to be, experts. That's the same as listening to a priest because they studied theology and claim to be in closer communion with God. If the expert is wrong, it is okay for even a child to point it out. In the end, the expert always has to be held accountable.

You laugh at amateur internet scientists, but I would laugh in the face of any professional scientist who tries to use the word consensus to say that the science is settled. To me these scientists are worse than the amateurs who are trying to understand the science and the facts and are pointing out problems with the data. The scientists should be delighted that discrepencies have been found and that there are questions still to be answered.

They shouldn't be trying to ignore or belittle sceptics who have shown a greater ability to engage in real science. Science isn't about being an expert who blindly studied in university anyways. An amateur can be more of a scientist than the professional, if the amateur follows the scientific method more thoroughly than the expert.

The demand for a clear upward trend denies the internal variability of the system on short time scales. This is what the whole debate with Little Fish is all about - should natural downturns of climate (in this case induced by a dominant series of La Nina's) mask the upwards AGW trend over short time scales - the answer is yes. This is why climate scientists are not interested in short duration variability. There are at least 8 short duration downward trends within the overall upward trend of the last 180yrs. They are not significant statistically and this is why 30 years is the minimal significant duration in assessing overall trends.

A priest has no recourse to evidence and no requirement to provide evidence to support his belief so the comparison is not valid.

Maybe you would like to design a computer chip after a few hours reviewing a blog on computers. You see there is a process of acquiring knowledge in a rigorous and systematic way which allows you to do things which others can not. This is applicable especially to fields such as stats which are not linear in the concepts which they employ - they require specific specialist training to understand.

Just because the field of climate science has come to a conclusion which you do not like doesn't means that that conclusion hasn't been arrived at through the same rigorous process as the computer chip designer. The folly of the Amateur is that he believes he knows better with absolutely no real knowledge other than belief.

A trained scientist acquires as p0art of his education a set of reasoning skills which generally allows him to distinguish the difference between real evidence and evidence designed to deceive.

Br Cornelius

Edited by Br Cornelius
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Look at what happens to the trend when you filter out the El Nino La Nino oscillation;

http://www.nature.com/nature/journal/v453/n7195/abs/nature06982.html

Br Cornelius

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The priest comparison is apt because in previous centuries it was deemed wrong simply to question the priest, as it is now wrong to question the climate 'scientist'. The church did point to many truths that provided evidence of God. Even Aquinas said that there was concrete evidence of God (i.e. through creation and through Jesus) up to a point, but the final acceptance of God always required faith, because God's existence could never be known for certain. And that was the position of the church ever since: a combination of evidence and faith. This was affirmed with the introduction of modern science in the 1600s. For instance, the perfect, precise workings of living bodies under a microscopic were claimed to be evidence of God's meticulous perfection. So too, the perfect motion of all the bodies in the solar system, all working in universal harmony. Unlike today, during the Enlightenment the priests (and some philosophes) believed that science validated religious faith.

The evidence they were seeing was in front of them, it just didn't apply to God at all. It's misattributed evidence. Which is what you get when you approach a topic with prejudice. The exact same can be said of warming and CO2, as they connect these two different components through an intermediary of faith.

And I wasn't talking about the process of using knowledge to create technology. I was referring to the scientific method: i.e. upholding the goals of repitition and of empirical observation. I know Michael Mann lies, simply because he refused to ever release his data. It's that simple for me. It shows he's no scientist, thus his data is spurious. But what's absolutely worse is he knows he lies, otherwise he would show his work and stand by it.

A trained scientist acquires as part of his education a set of reasoning skills which generally allows him to distinguish the difference between real evidence and evidence designed to deceive.

This certainly sounds romantic, and would be fantastic if true, but in most cases, if someone goes into a field with a certain bias, everything they learn will confirm that bias. Many scientists still stand behind Mann or Gore, even though everything they said was pure alarmism. Gore even bought his mansion in a place, that according to his documentary, will be under 20 feet of water when the sea rises. Like Mann, even he doesn't believe in his own alarmism.

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Look at what happens to the trend when you filter out the El Nino La Nino oscillation;

http://www.nature.co...ature06982.html

Br Cornelius

lol

If those oscilliations are helping to drive climate, of course it looks more drastic if they're removed.

That's like proving a car goes from 0-100 mph in 2 seconds by removing the revving up from 20-80. You'll end up with a similar spike.

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99% of science is engineering - your failure to see that there is no significant difference between the engineering applied to computers and climate shows you really do not understand what goes into verifying a theory. You obviously have no scientific training or you would be loath to make such a sweeping mis-statement. I did not accept the existence of the theoretical higgs boson until the engineers found it.

Manns hockey stick is based upon readily available data and has been duplicated by many other methods using other datasets. He has not lied - he has been verified by the scientific method (repetition by peers).

Science works from first principle evidence. the first principle evidence for AGW is the physics of greenhouse gases. The second strand of foundational evidence is the energy imbalance at the top of the atmosphere - the system is collecting heat. There are no acts of faith in these facts they are verifiable physical phenomenon. The rest of climate science is about how these basic facts play out within the planetary system.

All your other errors flow from a failure to understand the difference between science and belief.

The basic reason why most people reject the accumulated evidence of climate science is because it contradicts their foundational beliefs. These can be political (generally right wing), economic (free market liberalism), religious (God wouldn't let it happen) or conspiratorial (the powers that be are out to kill us).

Br Cornelius

Edited by Br Cornelius

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lol

If those oscilliations are helping to drive climate, of course it looks more drastic if they're removed.

That's like proving a car goes from 0-100 mph in 2 seconds by removing the revving up from 20-80. You'll end up with a similar spike.

The ENSO oscillation has been shown to be temperature neutral - that is it has no overall effect on the mean temperature. It is valid to filter it out because it has a dramatic effect on short term variability and prevents clear understanding of the trend underlying it.

IT IS NOT A CLIMATE FORCING - it is a response. It is like the knocking you get when you drive a car with wheel imbalance at a specific speed - it only occurs in response to a specific set of variables which it doesn't create.

Br Cornelius

Edited by Br Cornelius

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Undoubtedly the rate of warming over the last 15 years has slowed, but it certainly cannot be used as evidence that the theory of AGW is invalidated.

Br Cornelius

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