There’s two big issues here
Our work focuses on one of them

1. Climate models (unconstrained by obs) are running too hot
2. Scenarios used to “drive” these models are out of date (too much CO2)

Our work focuses on 2

Together these have led to serious issues needing fixed
You can read about the issues with scenarios here, based on foundational work by @jritch & continuing collaborations with @matthewgburgess

Many others have done important work on these issues as well …

issues.org/climate-change…
For the long, technical details plus references to the broader literature see our paper in ERSS (plz email or DM for a copy for those without access)

sciencedirect.com/science/articl…
The timing of all this is incredible

IPCC WG1 is meeting as I type this to approve its 6th assessment report

And just about everyone knows there are deep issues with application of scenarios across the literature

How will IPCC handle what we all know is dated/flawed science?

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More from @RogerPielkeJr

24 Jul
Weather & climate catastrophes in the EU-27 1995 to 2019 as a proportion of GDP
Here is the catastrophe data adjusted only for inflation
Data:
catastrophes = EEA (based on Munich Re) eea.europa.eu/data-and-maps/…
GDP = FRED (based on Eurostat) fred.stlouisfed.org/series/CPMNACS… & (based on OECD) fred.stlouisfed.org/series/NAGIGP0…
Read 5 tweets
23 Jul
A short 🧵 on my Senate testimony earlier this week
With key highlights

You can find the full text here:
banking.senate.gov/imo/media/doc/…
My focus is on the provision of robust science advice to policy makers on climate & evidence that scientific integrity has suffered in key ways

But first, lest there be any confusion. . .

1⃣ Those who are familiar with my views will know the below Image
2⃣ Scientific integrity would seem to a a topic that both Democrats and Republicans should be able to agree on

The US government generally (but definitely not always!) does an excellent job in soliciting and securing robust expert advice

Climate should be no different Image
Read 11 tweets
22 Jul
This is an interesting new paper
For heat outcomes, finds vulnerability reduction can be much more important than climate risk increase

Landreau et al 2021. Combining socio-economic & climate projections to assess heat risk. Climatic Change, 167(1), 1-20.
link.springer.com/article/10.100…
"The assessments of future climate risks are common; however, usually, they focus on climate projections without considering social changes"

True!

If you see a study with "no adaptation" used as a projection of the future, run away, fast!

This paper considers adaptation
How society develops will say more about how future heat risk evolves than will changing climate risk alone

The choices we make ... both emissions and societal will determine our collective future
Read 4 tweets
22 Jul
This is an important paper on flooding globally for several reasons

Do, H. X., Westra, S., & Leonard, M. (2017). A global-scale investigation of trends in annual maximum streamflow. Journal of Hydrology, 552, 28-43.

doi.org/10.1016/j.jhyd…
First, recognizing that there are regional differences, more locations saw decreasing trends than increasing trends

Overall, that means less flooding
Second - and this is really important - evidence of decreasing floods are contrary to evidence of increasing precipitation, and specifically maximum precipitation intensities

So YES extreme precip is going up (due to CC), but that does not mean that floods are also!
Read 6 tweets
21 Jul
There is no doubt that attribution claims have run far out ahead of detection of trends

"Since 1951, the number of heavy rainfall days per year for the whole of Germany has hardly changed, almost independently of their definition"
mdpi.com/2073-4441/12/7…

HT @AndrewSiffert
Similarly for Zhengzhou
doi.org/10.1002/joc.51…
I'm not sure how the current strong attribution claims (it's obvious, right?) can be reconciled with the observational data, but I'm sure there is an explanation

If certain extreme events have become much more likely, then evidence should show them being more likely? Or not?
Read 10 tweets
20 Jul
So that was fun

Thanks to @SenateBanking @BankingGOP for the opportunity to testify

Some thoughts on the hearing follow ...
Testimonies of

Frank Nutter @TheRAA
banking.senate.gov/imo/media/doc/…

@abdshafiee Abdollah Shafieezade
banking.senate.gov/imo/media/doc/…

Smart & w/ much solid policy recommendations to improve resilience & reduce vulnerability

(But both should stop confusing economic loss with climate trends!)
In most hearings I've been in Ds only engage D-invited witnesses & Rs w/ R-invitees

This wall of tribalism broke down today for just a brief moment

@SenatorTester listened to my testimony & express real surprise to learn that disaster losses are down as % GDP

Two points ...
Read 9 tweets

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