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Michael Wehner

@michaelfwehner.bsky.social

2K followers 89 following 74 posts

Climate scientist

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Michael Wehner @michaelfwehner.bsky.social · Nov 18

Special issue on Artificial intelligence and machine learning in climate & weather science in Advances in Statistical Climatology Meteorology & Oceanography. ML/AI in atmosphere, ocean & hydrological sciences welcomed. www.advances-statistical-climatology-meteorology-oceanography.net/articles/sch...

ASCMO - Scheduled SIs

www.advances-statistical-climatology-meteorology-oceanography.net

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Reposted by Michael Wehner, Ben Bond‐Lamberty, Benjamin I. Cook , and 1 more Michael Wehner, Ben Bond‐Lamberty, Benjamin I. Cook, Prajal Pradhan

IPCC @ipcc.bsky.social · 22d

📣 PRESS RELEASE

Registration for experts interested in serving as Expert Reviewers and providing scientific comments on the First Order Draft of the Special Report on Climate Change and Cities is now open!

Registration closes 30 Nov 2025.

Read more 🔗 www.ipcc.ch/2025/09/17/p...

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Michael Wehner @michaelfwehner.bsky.social · Aug 27

It would be interesting to calculate the partitioning of cooling by upwelling compared to energy converted to storm energy.

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Michael Wehner @michaelfwehner.bsky.social · Aug 18

Some more literature. Risk is increased near shore which is not good. agupubs.onlinelibrary.wiley.com/doi/10.1029/...

A Global Increase in Nearshore Tropical Cyclone Intensification

Tropical cyclone (TC) intensification rates have increased in near coastal regions over the 42-year period 1979-2020 Increases in relative humidity along with decreases in vertical wind shear are...

agupubs.onlinelibrary.wiley.com

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Michael Wehner @michaelfwehner.bsky.social · Aug 18

Thanks. And btw, in our cat 6 paper, we do not see substantial risk in the open Atlantic.

Michael Wehner @michaelfwehner.bsky.social · Aug 17

Does eyewall replacement cause the expansion in size? Or is it some other physical mechanism like available energy?

Michael Wehner @michaelfwehner.bsky.social · Aug 17

Jeff, what is the mechanism causing this expansion in physical size?

Michael Wehner @michaelfwehner.bsky.social · Aug 16

I am an executive editor for a journal. I would ask now. It may be that they are having trouble finding a suitable AE. Or it may have slipped between the cracks. In any event, the editor should let you know.

Michael Wehner @michaelfwehner.bsky.social · Aug 3

And to consider the change in risk of near shore intense storms agupubs.onlinelibrary.wiley.com/doi/10.1029/...

agupubs.onlinelibrary.wiley.com

Michael Wehner @michaelfwehner.bsky.social · Aug 3

You may not want to assume that the risk of landfall remains constant at 11% www.science.org/doi/10.1126/...

Increased U.S. coastal hurricane risk under climate change

Future ocean warming in eastern tropical Pacific will enhance US hurricane risk through changes in steering flow and wind shear. 

www.science.org

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Michael Wehner @michaelfwehner.bsky.social · Jul 29

I presume these values are from the NOAA look up table. Recent work finds that they underestimate the heat index for very high values. iopscience.iop.org/article/10.1...

Michael Wehner @michaelfwehner.bsky.social · Jul 26

Thank you for posting. I have hundreds of hours into these (2,3,4,& 5) . At taxpayer expense, I might add.

Marshall Shepherd @drshepherd2013.bsky.social · Jul 26

If you are having trouble finding National Climate Assessment reports, they are here.

www.realclimate.org/index.php/ar...

RealClimate: National Climate Assessment links

RealClimate: For some reason, it has become hard to locate the various National Climate Assessments (NCAs) that have been produced by the USGCRP over the decades (and it's pretty hard to find the USGR...

www.realclimate.org

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Reposted by Michael Wehner, Ben Bond‐Lamberty, Gavin A. Schmidt , and 2 more Michael Wehner, Ben Bond‐Lamberty, Gavin A. Schmidt, Elena Litchman, Beth Tellman

Marshall Shepherd @drshepherd2013.bsky.social · Jul 26

If you are having trouble finding National Climate Assessment reports, they are here.

www.realclimate.org/index.php/ar...

RealClimate: National Climate Assessment links

www.realclimate.org

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Michael Wehner @michaelfwehner.bsky.social · Jul 25

Probably not above the upper bound. But generally more than 7 standard deviations is "impossible" www.sciencedirect.com/science/arti...

Data-driven upper bounds and event attribution for unprecedented heatwaves

The last decade has seen numerous record-shattering heatwaves in all corners of the globe. In the aftermath of these devastating events, there is inte…

www.sciencedirect.com

Michael Wehner @michaelfwehner.bsky.social · Jul 24

"Extreme weather events, such as hurricanes, droughts and heatwaves, are becoming more frequent and intense..." Present tense; attribution is recognized with this statement.

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Michael Wehner @michaelfwehner.bsky.social · Jul 22

Congratulations Ben!!!

Reposted by Michael Wehner, Benjamin I. Cook

Tim Osborn @timosbornclim.bsky.social · Jul 21

Delighted to announce that Ben Santer is now an Honorary Professor @ueaenv.bsky.social & the Climatic Research Unit (CRU).

Ben is returning to his "academic home": he did his PhD in CRU before his stellar career developing "fingerprint" methods to identify human & natural effects on climate.

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Michael Wehner @michaelfwehner.bsky.social · Jul 19

There are very few of us doing rigorous event attribution in the US. Extreme weather events are increasing but attribution scientists numbers are decreasing.😞

Reposted by Michael Wehner, Du Toit

Prof Friederike Otto @frediotto.bsky.social · Jul 17

What caused deadly landslides in Colombia? Finding out, should be easier. Tropical climates are complex, but if data are held by companies & organisations hiding them behind walls of bureaucracy it becomes impossible. @wwattribution.bsky.social study: www.worldweatherattribution.org/growing-expo...

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Michael Wehner @michaelfwehner.bsky.social · Jul 16

And to further bridge the stats/climate gap, I started this journal to aid in cross field communication. www.advances-statistical-climatology-meteorology-oceanography.net

ASCMO - Home

www.advances-statistical-climatology-meteorology-oceanography.net

Reposted by Gavin A. Schmidt

Michael Wehner @michaelfwehner.bsky.social · Jul 16

Having engaged with numerous professional statisticians, I find this a gross over generalization. As with any cross-discipline, success requires two way communication. And there is a language barrier. But recent workshops are bridging this gap. See my opinion piece: doi.org/10.1029/2019...

Climate Science Needs Professional Statisticians - Eos

Climate science needs its own specialized “climostatisticians” as integral members of multidisciplinary research teams.

doi.org

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Michael Wehner @michaelfwehner.bsky.social · Jul 13

When we wrote the Cat 6 hurricane article, we recognized that a single number cannot convey local danger that individuals might face & instead recommended that NHC products, especially maps, are superior. NHC warnings have also become more direct. i.e. "certain death". Such messages might help here

Michael Wehner @michaelfwehner.bsky.social · Jul 11

It can get pretty hot.

How Hot Can It Get? Scientists Are Struggling to Find an Answer

Figuring out how anomalously high temperatures can rise is taking on added importance as the planet warms.

www.bloomberg.com

Michael Wehner @michaelfwehner.bsky.social · Jul 11

The DOE BER takes a big hit. Scroll to page 102: www.energy.gov/sites/defaul...

www.energy.gov

Reposted by Michael Wehner

Cabot Institute for the Environment @cabot-institute.bsky.social · Jun 19

☀️Heatwaves☀️, like the one we're having this week, will be made even more dangerous by climate change.

Dr @eunicelo.bsky.social is on a mission to map how heat can affect people living in cities like Bristol.

#heatwave @bristoluni.bsky.social @ebibristol.bsky.social

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Michael Wehner @michaelfwehner.bsky.social · Jul 10

Apologize that i am such a curmudgeon. Comes with age...

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Michael Wehner @michaelfwehner.bsky.social · Jul 10

To clarify.Impacts are often binary, then we can make the binary causal statement. But meteorology is not so binary. (And some impacts are not binary, like heatwave deaths) and it is important to note that impact attribution is in early stages. 2 important papers in review now

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Michael Wehner @michaelfwehner.bsky.social · Jul 10

The dam breach is an extreme weather impact & I would agree. But I maintain my hot button for the ‘weather’ event. An important but subtle distinction

Michael Wehner @michaelfwehner.bsky.social · Jul 9

The title hits my hot button on causality. It causes them to be worse but doesn’t cause them per se. Complex events have complex causal factors

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Michael Wehner @michaelfwehner.bsky.social · Jul 9

What bothered me is that the anchor asked her question in the future tense. It should be in the present tense.