Category Archives: Mathematics

Climate Models

They seem to be modeling some other planet:

Christy compared the outputs for the tropical troposphere of 73 models used by the IPCC in its latest report with satellite and weather balloon temperature trends since 1979. “The tropics is so important,” Christy explains in an email message, “because that is where models show the clearest and most distinct signal of greenhouse warming-so that is where the comparison should be made (rather than say for temperatures in North Dakota). Plus, the key cloud and water vapor feedback processes occur in the tropics.”

When it comes to simulating the atmospheric temperature trends of the last 35 years, Christy found, all of the IPCC models are running hotter than the actual climate. The IPCC report admits that “most, though not all, of [the climate models] overestimate the observed warming trend in the tropical troposphere during the satellite period 1979-2012.” To defend himself against any accusations of cherry-picking his data, Christy notes that his “comparisons start in 1979, so these are 35-year time series comparisons”-rather longer than the 15-year periods whose importance the IPCC downplays.

Why the discrepancy between the IPCC and Christy? As Georgia Tech climatologist Judith Curry notes, data don’t speak for themselves; researchers have to put them into a context. And your choice of context-say, the year you choose to begin with-can influence your conclusions considerably. While there may be nothing technically wrong with the way the IPCC chose to display its comparison between model data and observation data, Curry observes, “it will mislead the public to infer that climate models are better than we thought.” She adds, “What is wrong is the failure of the IPCC to note the failure of nearly all climate model simulations to reproduce a pause of 15-plus years.”

There is too much that they don’t, and at least for now, can’t capture. And it would be economically insane to base policy on them.

The Democrats Health-Care Catastrophe

Literally:

…for most of the three years since Obamacare was passed, the majority of the population has disapproved of it (see the second chart here at Real Clear Politics), yet that didn’t really translate into significant public anger or political action, beyond the 2010 mid-term election results. In fact, Sen. Ted Cruz’s filibuster attempt and the House’s short-lived shutdown appeared to push public opinion against those actors rather than against Obamacare.

But that has changed, and dramatically, with the law actually going into effect — and Healthcare.gov going live — back on October 1st. For the first time, Obamacare got “close enough” to significant portions of the American electorate to trigger a sudden shift in actual emotional response from a generic disapproval to outright hostility. I believe that Obama and his Administration — lulled, perhaps, by the more passive dislike evinced by the public up until now — have been caught genuinely off-guard by the dramatic change in public opinion in a month’s time, not just towards Obamacare but towards Obama himself. I believe that shift in fact represents a ‘catastrophe’ — that is, an abrupt transition from one state to another– brought on by the realities of Obamacare hitting home.

I don’t think there’s any precedent for a second-term president recovering from something like this.

The Fallacies Of Risk

Some thoughts on their application to climate policy, in response to Judith Curry’s take.

As I noted on Twitter, two points. First, there really is no good physical case to be made that warmer global temperatures results in more extreme weather events. Storms are heat engines, driven by temperature differences, not total enthalpy. Also, I wrote about the fallacy of the precautionary principle as applied to climate policy four years ago.

Invoking “Consensus” To Shut Off Debate

…is unscientific:

It seems to make no difference that those challenging the doomsday narrative include some of the world’s most distinguished scientists, or that numerous experts in climatology and related earth sciences have repeatedly gone public with their critiques. To climate ideologues, they’re invisible. “Ninety-seven percent of scientists agree: #climate change is real, man-made and dangerous,” President Obama tweeted in May.

Really? That’s not what the American Meteorological Society learned from a recent survey of its professional members. Only a bare majority, 52 percent, said that climate change is largely being driven by human activity. Scientists with a “liberal political orientation” were much more likely to regard global warming as human-caused and harmful, the survey’s authors found — in fact, as a predictor of respondents’ views on global warming, ideology outweighed greater expertise. “This would be strong evidence against the idea that expert scientists’ views on politically controversial topics can be completely objective,” the authors observe.

In that light, consider the findings of a new study published in the journal Nature Climate Change. Of 117 global warming predictions generated by climate-model simulations, all but three “significantly” overestimated the actual amount of warming that occurred during the past 20 years. The models typically forecast that global surface temperature would rise by more than twice as much as it did.

Why would so many scientists have relied on models that turned out to be so wrong? The authors propose several plausible explanations — volcanic eruptions? solar irradiation? — but their bottom line is that climate science still has a long way to go: “Ultimately the causes of this inconsistency will only be understood after . . . waiting to see how global temperature responds over the coming decades.”

That understanding won’t be advanced one millimeter by ideologues who thunder that the “science is settled.” Perhaps all those climate models wouldn’t have been programmed to overpredict global warming if the pressure to conform to the alarmists’ view weren’t so pervasive.

Ya think?

[Update a while later]

Global warming “proof” is evaporating:

Mind you, the term “pause” is misleading in the extreme: Unless and until it resumes again, it’s just a “stop.” You don’t say a bullet-ridden body “paused” breathing.

Remarkably, that stoppage has practically been a state secret. Just five years ago, the head of the International Panel on Climate Change, the group most associated with “proving” that global warming is man-made and has horrific potential consequences, told Congress that Earth is running a “fever” that’s “apt to get much worse.” Yet he and IPCC knew the warming had stopped a decade earlier.

Those who pointed this out, including yours truly, were labeled “denialists.” Yet the IPCC itself finally admitted the “pause” in its latest report.
The single most damning aspect of the “pause” is that, because it has occurred when “greenhouse gases” have been pouring into the atmosphere at record levels, it shows at the very least that something natural is at play here. The warmists suggest that natural factors have “suppressed” the warming temporarily, but that’s just a guess: The fact is, they have nothing like the understanding of the climate that they claimed (and their many models that all showed future warming mean nothing, since they all used essentially the same false information).

This is junk science. I would note to Mr. Fumento, though, that educated people knew the earth was round centuries before Columbus.

Ten Questions For Al Gore

from a Canadian:

Earlier this year in an interview with the Globe and Mail you described Canada’s development of the oil sands as the equivalent of treating the atmosphere like an “open sewer.” What do you have to say about the findings of Canadian climate scientist and lead UN IPCC author Andrew Weaver, and his colleague Neal Swart, published in the journal Nature, that even if Canada developed all the commercially viable oil in the oilsands, global temperatures would rise by an insignificant 0.03 degrees?

It’s frightening how close this pompous hypocritical math-challenged fool came to being president.

Computer Problems

I just put a new install of Fedora 20 (yes, I know it’s still beta) on a brand-new Western Digital 2T drive, and it boots into emergency mode. Here’s the final output of journalctl -xb:

[Update in the afternoon]

For anyone who’s interested, here is the output of of ‘journalctl -xb’ and here is dmesg.

[Update a couple minutes later]

Whoa! Now that I look through that enire output of journalctl, I see a lot of file system errors on the /home partition. Guess I’ll run e2fsck and see if that fixes it.

[Update a while later]

Welp, that was the problem. I ended up just doing a reinstall, and let Fedora decide how to partition. I’m not real happy with it, because I’m not sure that fifty gig is ultimately big enough for root and I don’t want to have to resize later, but at least it’s working now.

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