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The Honest Broker Profile picture
@RogerPielkeJr
Aug 7 • 7 tweets • 3 min read • Read on X
🧵The US National Climate Assessment has been a politiczed mess from the start due to its institutional design, which places it in the White House

The NCA proved too tempting for both Ds and Rs to put a thumb on the scale

Links at end of thread . . .
The idea it was perfect under Democrats, as @afreedma & other advocacy journos suggest, is simply wrong

The most recent NCA was totally capture by interest groups and companies that would benefit from the report - UCS, TNC, EDF, CAP, Stripe etc

Below just a few of its authors Image
@afreedma The head of the NCA5 stated publicly that she would never cite our work in the assessment, even though our work is by far the most cited research on economic losses in the US associated with floods, hurricanes, tornadoes

Here is how the NCA handled a reviewer comment Image
@afreedma Fixing the NCA would not be difficult in principle
Politically, maybe impossible

As we've seen this past week, climate science has a deep cultural problem with gatekeeping, tribalism, pathological politicization, in-group out-group policing

Activist journos fuel the flames Image
@afreedma I've heard from many climate scientists privately in the last week who express concern about their community

Every one is fearful of retribution should they say anything, so great is the pressure

The climate police who apply the pressure love political conflict

It is a WAR! Image
@afreedma The community needs new leaders who respect debate, discussion, and, yes, willingness to disagree at times

The notion that climate science is part of a political movement needs to change

The enforcement and punishment of anyone perceived as a political enemy must stop
@afreedma Read more about the NCA below

rogerpielkejr.substack.com/p/trump-comes-…

rogerpielkejr.substack.com/p/climate-misi…

rogerpielkejr.substack.com/p/original-sin

rogerpielkejr.substack.com/p/fixing-the-u…

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More from @RogerPielkeJr

The Honest Broker Profile picture
Jul 31
🧵Let's take a quick look at the implications of the regulations that have followed from the 2009 EPA endangerment finding

According to @C2ES_org the 2021 GHG standards for light vehicles would reduce projected CO2 emissions by a cumulative 3.1 billion tons to 2050
c2es.org/content/regula…Image
Over the next 25 years the world would emit 925 gigatons of CO2 assuming constant 2025 emissions and ~690Gt assuming emissions are cut in half by 2050

That means that the projected impact of the regulations would reduce global emissions by 0.0003% (constant) & 0.0004% (halved)
The idea that CO2 can be regulated out of the economy is flawed

If the purpose of CO2 regulation is to create a shadow carbon tax, then it is a horribly inefficent way to do that

Once again, all this leads us back to Congress and the need for smart energy & climate policy
Read 4 tweets
The Honest Broker Profile picture
Jan 11
🧵
The percentage of a percentage trick is increasingly common & leads to massive confusion

Here a undetectable difference of 0.01 events per year per decade is presented as the difference between a 31% and 66.4% increase (in the *likelihood* of the event, not the event itself) Image
The resulting confusion is perfectly predictable

Here is a reporter (NPR) explaining completely incorrectly:
"The phenomenon has grown up to 66% since the mid-20th century"

False Image
Also, the numbers in the text and figure do not appear to match up
I asked Swain about this over at BlooSkeye Image
Read 4 tweets
The Honest Broker Profile picture
Dec 22, 2024
The new hurricane damage time series trick

Step 1: create Frankenstein dataset w/ an increasing trend where there was not an increasing trend before

Step 2: Attribute the increasing trend to climate change

Step 3: Use Frankenstein dataset to impeach other research w/ no trend Image
The reason that the blue and red numbers are different is that they are different measures of hurricane losses

E.g., the red numbers include inland NFIP damage
The blue numbers do not, on purpose, because NFIP only started in 1968

They are apples and oranges
Now 3 peer-reviewed papers (PNAS, JAMC, BAMS) make this most basic of errors by replacing and splicing NOAA BDD to the MWR/NHC time series

Predictably all three papers find an increasing trend in normalized hurricane damage even though landfalling hurricanes are not increasing Image
Read 6 tweets
The Honest Broker Profile picture
Dec 21, 2024
A Frankenstein dataset results from splicing together two time series found online

Below is an example for US hurricane damage 1900-2017
Data for 1980-2017 was replaced with a different time series in the green box
Upwards trend results (red ---)

Claim: Due to climate change! Image
The errors here are so obvious and consequential that it is baffling that the community does not quickly correct course

Read about it here
Is my analysis flawed?
osf.io/preprints/osf/…
The IPCC AR6 cited a paper misusing the Frankenstein hurricane loss dataset to suggest that NOAA's gold standard hurricane "best track" dataset may be flawed

JFC - Using flawed economic loss data to suggest that direct measurements of hurricanes are in error! Image
Read 6 tweets
The Honest Broker Profile picture
Nov 2, 2024
We’ve reached the point where an IPCC author is openly rejecting the conclusions of the IPCC out of concern over how their political opposition is correctly interpreting the AR6

The integrity of the IPCC on extreme events is now under attack
The IPCC explains that a trend in a particular variable is DETECTED if it is outside internal variability and judged with >90% likelihood

For most (not all) metrics of extreme weather detection has not been achieved

That’s not me saying that, but IPCC AR6 Image
The IPCC also assesses that for most (but not all) metrics of extreme weather the signal of a change in climate will not emerge from internal variability with high confidence (ie, >90%) by 2050 or 2100, even assuming the most extreme changes under RCP8.5 Image
Read 6 tweets
The Honest Broker Profile picture
Oct 31, 2024
🧵
You won't believe this

The US National Academy of Sciences has a new study committee on Extreme Event Attribution

Among its sponsors are the Bezos Earth Fund and Robert Litterman

Who are they? . . . Image
Image
The Bezos Earth Fund sponsors World Weather Attribution, an advocacy group promoting the connection of weather events w/ fossil fuels in support of press coverage & lawsuits

Robert Litterman is on the board of Climate Central which founded WWA & collaborates on climate advocacy Image
The fact that a NAS committee is funded by political advocates is crazy enough

But that is not all

On the committee itself are individuals from two climate advocacy groups

One . . . the Union of Concerned Scientists which is working to use attribution to support lawsuits . . . Image
Read 7 tweets

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