Showing posts with label IPCC. Show all posts
Showing posts with label IPCC. Show all posts

November 3, 2014

Meanwhile, Outside...

Yes, I know there's a midterm election tomorrow.  Get your ass out there and vote!

But meanwhile, from the beeb:
The IPCC's Synthesis Report was published on Sunday in Copenhagen, after a week of intense debate between scientists and government officials.

It is intended to inform politicians engaged in attempts to deliver a new global treaty on climate by the end of 2015.

The report says that reducing emissions is crucial if global warming is to be limited to 2C - a target acknowledged in 2009 as the threshold of dangerous climate change.
Here's the report.

Some highlights:
Warming of the climate system is unequivocal, and since the 1950s, many of the observed changes are unprecedented over decades to millennia. The atmosphere and ocean have warmed, the amounts of snow and ice have diminished, and sea level has risen.
And some details regarding the above:
Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since 1850. The period from 1983 to 2012 was very likely the warmest 30-year period of the last 800 years in the Northern Hemisphere, where such assessment is possible (high confidence) and likely the warmest 30-year period of the last 1400 years (medium confidence).

The globally averaged combined land and ocean surface temperature data as calculated by a linear trend, show a warming of 0.85 [0.65 to 1.06] °C1 over the period 1880 to 2012, for which multiple independently produced datasets exist. The total increase between the average of the 1850–1900 period and the 2003–2012 period is 0.78 [0.72 to 0.85] °C, based on the single longest dataset available. For the longest period when calculation of regional trends is sufficiently complete (1901 to 2012), almost the entire globe has experienced surface warming. [Italics in original]
But it hasn't warmed in 18 years right?  So that means all that above is bullshit, right?

Wrong:
In addition to robust multi-decadal warming, the globally averaged surface temperature exhibits substantial decadal and interannual variability. Due to this natural variability, trends based on short records are very sensitive to the beginning and end dates and do not in general reflect long-term climate trends. As one example, the rate of warming over the past 15 years (1998–2012; 0.05 [–0.05 to 0.15] °C per decade), which begins with a strong El NiƱo, is smaller than the rate calculated since 1951 (1951–2012; 0.12 [0.08 to 0.14] °C per decade).
So next time you hear someone say that the warming has stopped because it "hasn't changed" (or whatever) in 18 years or so, tell them that they're bringing up something the actual scientists already know about and they've already explained away and that coming to a conclusion based on a short term that's skewed by the dates picked is not very reliable scientifically.  No, not at all.

September 28, 2013

Scaife, The Trib, And The NIPCC

I don't think the editorial board fully understands the unintended irony of the opening of today's op-ed:
A new Nongovernmental International Panel on Climate Change (NIPCC) report shows just how weak the case is for “man-made” global warming. Unlike United Nations Intergovernmental Panel on Climate Change (IPCC) reports, the NIPCC's 1,200-page report has no governmental sponsorship, freeing it from conclusions predetermined by politics. It comes from a consortium of The Heartland Institute, the Science & Environmental Policy Project and the Center for the Study of Carbon Dioxide and Global Change.
So the funding of a report determines its outcome?  Maybe it's not that harsh.  Perhaps what they're saying is that the source sponsorship of a report can undermine the validity of that report.

The Guardian has some background info on the groups supporting the NIPCC:
The report is the latest in the Heartland Institute's "Climate Change Reconsidered" series and the cornerstone of its campaign against the IPCC's fifth assessment. Heartland is aggressively pushing the report in op-eds, blogs and in articles in conservative newspapers and news stations. Among others, it has received coverage in the Australian newspaper The Daily Telegraph, The Washington Times and the UK's Daily Mail, in an article that had to be "significantly" changed due to errors.

Other groups participating in the report include the Science & Environmental Policy Project, a research and advocacy group founded by climate skeptic Fred Singer—who is also the director of Heartland's Science and Environmental Policy Project—and the Center for the Study of Carbon Dioxide and Global Change, an Arizona-based climate skeptic group partly funded by ExxonMobil.
Ok, so who sponsored the NIPCC report?  More specifically, who supports The Heartland Institute, The Science & Environmental Policy Project and the Center for the Study of Carbon Dioxide and Global Change?

You already know the answer but let's take a look anyway.  The NIPCC was set up by Fred Singer and

Let's start with The Heartland Institute.  Over the years it's received (among many others):
  • $555,000 from Exxon
  • $350,000 from the Sarah Scaife and Carthage Foundations
By the way, Fred Singer's also involved with the Science & Environmental Policy Project.
And how about the Center for the Study of Carbon Dioxide and Global Change? It's received:
  • $75,000   from Exxon
  • $100,000 from the Sarah Scaife Foundation 
That's a million dollars right there.  So IF the sponsorship of a report can predetermine it's outcome, then why can't we assume the exact same thing about the NIPCC? Funny but Scaife's braintrust never says.

But let's look at some of the specific things in the op-ed:
Taking into account research ignored by or contrary to the IPCC's blame-mankind assumptions — and its latest report, unveiled on Friday, was no exception — the NIPCC report says “climate sensitivity to CO2 is much lower than (the IPCC's incomplete climate) models assume.”
And an explanation from skepticalscience:
The NIPCC report exclusively examines the literature published by climate "skeptics," whereas the IPCC report examines the work of both "skeptics" and mainstream climate scientists. For example, the 2011 NIPCC report has a section about climate sensitivity - how much the planet will warm in response to increasing CO2 emissions. Climate sensitivity is one of the most important climate science issues, especially for climate "skeptics", whose arguments for climate inaction depend entirely on low climate sensitivity. It tells us how much we can expect the planet to warm, depending on how much CO2 we emit in the future.

However, the 2011 NIPCC report only devoted one sub-section (and one page) to the subject of climate sensitivity, and only referenced four scientific studies on the subject (one of which is the debunked Lindzen and Choi [2009]; a second was specific to high-latitude, not global sensitivity; a third was published in a journal of dubious quality over a decade ago; and the fourth does not support low sensitivity). The IPCC report on the other hand devotes several sections to the subject (i.e. here and here and here) and references dozens of peer-reviewed studies investigating the question of climate sensitivity. It's a clear difference between comprehensive and selective reviews.
And then there's this:
It cites the stability of global temperatures since 1997, “despite an 8 percent increase in atmospheric CO2.”
As we already know, there's been no "stability" since 1998.  It's still getting warmer:
The year 1998 was remarkably warm relative to the underlying trend line, in association with the El Nino" of the century. But the underlying global temperature has continued to rise, despite the fact that solar irradiance for the past few years has been stuck in the deepest solar minimum in the period of satellite data.
And so on.

February 18, 2012

Huh?

Scaife's braintrust can be faithfully expected to spew the usual right wing nutty nut job skepticism when it comes to climate science.  But today's editorial is something all together different:
Climate alarmists who blame mankind's "smokestack" emissions betray their unscientific slant by ignoring the effects of pre-industrial clearing of forests, which a new study documents.

Six French researchers report in the journal Science that ancient sediment cores from the Congo River's mouth show a significant human role "in changing the landscapes of Central Africa" about 3,500 years ago, according to Scientific American.

The cores show river sediments increased suddenly, without increased rainfall, at the time when the Bantu people "brought farming into the region."

Clearing forests to plant oil palm, pearl millet and yams -- "crops that need plenty of sunlight" -- they helped create African savannas, previously thought to be the result of "climate change" only.

Scientific American says the paper doesn't settle which came first, savannas or agriculture. But by demonstrating that clearing forests -- a practice that continues today -- can change climate, the paper exposes a glaring blind spot in global-warming alarmists' "reasoning."

It's a reminder that "settled" science about incredibly complex ecosystems is anything but settled -- and that when politics enters scientific debate, such debate becomes anything but serious and scientific.
The argument, I think, is that because humans have been affecting the climate for millenia by cutting down trees, "climate alarmists" get it wrong when they blame "smokestack" emissions for climate change.

I think that's it.  I can't really tell.  Are they saying that global warming isn't occurring because it's always occurred as long as human beings farmed?  Or that it is occurring (what??) but not because of green house gasses.  Let's look at the science anyway to see what we find.

September 3, 2010

The Trib And Climate Change - What They Say And Don't Say

It's always a pleasure to tussle with the Scaife's braintrust over climate change. It's always quick work and they always end up looking more or less sillier for the effort. 

Today is no different. You should note that the Braintrust has yet to address the report from NOAA establishing that the science of climate change is "undeniable."

Keep that in mind as you read an editorial that begins with:
An independent group's recommendations might improve the United Nations' Intergovernmental Panel on Climate Change (IPCC) process. But the real test is whether the next IPCC report's conclusions reflect genuine science, not blame-mankind extremism.

The 12-member group was chosen by the Amsterdam-based InterAcademy Council. The recommendations seek to bolster IPCC's credibility, justifiability diminished by errors in its 2007 report and the Climategate e-mails showing data irregularities.
And ends with:
Yet when it comes to substance, the group is brimful of alarmist Kool-Aid, saying humanity "very likely" is to blame for climate change. Until the IPCC takes that as a hypothesis to be evaluated objectively via the uncorrupted scientific method -- not as the foregone conclusion its "science" must support -- real reform won't occur. [italics in original]
So what's the subtext of the Trib's message here?  First that the IPCC report does NOT reflect "genuine science" (or else there'd be no need for a change).  Second, the IPCC's credibility was diminished by "errors" such as the Climategate e-mails (even though those emails did not show data irregularities) and third that the science of the 2007 IPCC report is the product of a corrupted scientific process.

Now, what does the IAC report say?  Let's check their own press release.  It begins with this:
The process used by the Intergovernmental Panel on Climate Change to produce its periodic assessment reports has been successful overall, but IPCC needs to fundamentally reform its management structure and strengthen its procedures to handle ever larger and increasingly complex climate assessments as well as the more intense public scrutiny coming from a world grappling with how best to respond to climate change, says a new report from the InterAcademy Council (IAC), an Amsterdam-based organization of the world’s science academies.
And on those errors:
Given that the IAC report was prompted in part by the revelation of errors in the last assessment, the committee examined IPCC’s review process as well. It concluded that the process is thorough, but stronger enforcement of existing IPCC review procedures could minimize the number of errors. To that end, IPCC should encourage review editors to fully exercise their authority to ensure that all review comments are adequately considered. Review editors should also ensure that genuine controversies are reflected in the report and be satisfied that due consideration was given to properly documented alternative views. Lead authors should explicitly document that the full range of thoughtful scientific views has been considered.

The use of so-called gray literature from unpublished or non-peer-reviewed sources has been controversial, although often such sources of information and data are relevant and appropriate for inclusion in the assessment reports. Problems occur because authors do not follow IPCC’s guidelines for evaluating such sources and because the guidelines themselves are too vague, the committee said. It recommended that these guidelines be made more specific — including adding guidelines on what types of literature are unacceptable — and strictly enforced to ensure that unpublished and non-peer-reviewed literature is appropriately flagged.
But it's the last rhetorical gesture of the braintrust that most fully shows their hand.

They still insist that climate change is a "hypothesis" that has yet to be evaluated in spite of all the real science showing otherwise. Did I mention NOAA saying it was "undeniable"? Has the Trib even mentioned that yet?

See? Sillier and sillier, they get.

Happy Friday.

July 31, 2010

In Case You Missed It...

From the National Climatic Data Center at the Department of Commerce report State of the Climate in 2009, the opening paragraph of the Report at a Glance:
A comprehensive review of key climate indicators confirms the world is warming and the past decade was the warmest on record. More than 300 scientists from 48 countries analyzed data on 37 climate indicators, including sea ice, glaciers and air temperatures. A more detailed review of 10 of these indicators, selected because they are clearly and directly related to surface temperatures, all tell the same story: global warming is undeniable. [emphasis added]
Let's be honest, though. This is just the conclusion. Any (and I mean this sincerely) curious person has to ask some questions about that paragraph, if only to fill in the blanks. The report mentions 10 "key indicators." What sorts of "indicators" are we talking about? And what's the evidence for each?

The ten indicators are:
If you click on the links you'll find a multi-colored graph that describes the data as well as a reference to the source of the data itself. The report goes on to say that the first seven of these are increasing and the last three are decreasing.

But isn't it possible for the data sets for each indicator to, you know, overlap? Because if six sets all copy the seventh and the seventh is flawed, then you really only have one flawed set masquerading as seven that all conveniently corroborate each other.

That's correct, my young Jedi, it is possible. Only in this case, the text on the page summarizing all the graphs reads:
The panels on this page show changes in climate indicators over several decades. Each of the different colored lines in each panel represents an independently analyzed set of data. The data come from many different technologies including weather stations, satellites, weather balloons, ships and buoys. [emphasis added]
Now before someone from the Trib screams Climategate!, let me quote something Chapter 2 of the full report, titled How Do We Know The World Has Warmed?
Although the IPCC AR4 concluded that “warming of the climate system is unequivocal,” public debate over the evidence for global warming continues. However, it is often confined to a small set of reiterated disputes about Land Surface Air Temperature (LSAT)records, diverting attention from the broader evidence basis.

The methods used to derive the principal estimates of global sur face temperature trends — HadCRUT3 (Brohan et al. 2006), NOA A (Smith et al. 2008), and NASA/GISS (Hansen et al. 2001)—are largely independent. So, the spread of the three estimates indicates the likely degree of uncertainty in the evolution of the global mean surface temperature.
And then a little bit later:
The IPCC conclusion (Alley et al. 2007) that “warming of the climate system is unequivocal” does not rest solely upon LSAT records. These constitute only one line of evidence among many, for example: uptake of heat by the oceans, melting of land ice such as glaciers, the associated rise in sea level, and increased atmospheric surface humidity. If the land surface records were systematically flawed and the globe had not really warmed, then it would be almost impossible to explain the concurrent changes in this wide range of indicators produced by many independent groups. The observed changes in a broad range of indicators provide a self-consistent story of a warming world. [emphasis added.]
Undeniable.