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Communicating Climate

Watching the detections

25 Sep 2022 by Gavin

The detection and the attribution of climate change are based on fundamentally different frameworks and shouldn’t be conflated.

We read about and use the phrase ‘detection and attribution’ of climate change so often that it seems like it’s just one word ‘detectionandattribution’ and that might lead some to think that it is just one concept. But it’s not.

[Read more…] about Watching the detections

Filed Under: Climate impacts, Climate modelling, Climate Science, climate services, Featured Story, heatwaves, Instrumental Record, IPCC, statistics Tagged With: attribution, detection, extreme events

Mmm-k scale climate models

25 Jun 2022 by Gavin

Ocean eddy visualization (Karsten Schnieder)

What’s good (and what’s not quite ready) about plans for ‘k-scale’ climate modeling?

[Read more…] about Mmm-k scale climate models

Filed Under: Climate modelling, Climate Science, climate services, El Nino, Featured Story, Greenhouse gases Tagged With: CMIP6, digital twins, k-scale

Digital Twinge

28 Apr 2022 by Gavin

A couple of weeks ago the EU announced that they were funding a project called DestinE (Destination Earth) to build ‘digital twins’ of the Earth System to support policy making and rapid reaction to weather and climate events.

While the term ‘digitial twin’ has a long history in the engineering world, it’s only recently been applied to Earth System Modeling, and is intended (I surmise, as does Bryan Lawrence) to denote something more than the modeling of either weather or climate that we’ve been doing for years. But what exactly? And is it an achievable goal or just a rebranding effort of things that are happening anyway?

[Read more…] about Digital Twinge

Filed Under: Climate impacts, Climate modelling, Climate Science, climate services, Featured Story, Instrumental Record Tagged With: cloud computing, DestinE, digital twin

The modern demarcation problem

19 Apr 2022 by Gavin

Defining (and enforcing) a clear line between information and mis-information is impossible, but that doesn’t mean misinformation doesn’t exist or that there is nothing to be done to combat it.

I found myself caught in an ‘interesting’ set of exchanges on twitter a few weeks ago (I won’t link to it to spare you the tedium, but you could probably find it if you look hard enough). The nominal issue was whether deplatforming known bull******s was useful at stemming the spread of misinformation (specifically with respect to discussions around COVID). There is evidence that this does in fact work to some extent, but the twitter thread quickly turned to the question of who decides what is misinformation in the first place, and then descended into a free-for-all where just the very mention that misinformation existed or that the scientific method provided a ratchet to detect it, was met with knee-jerk references to the Nazi’s and the inquisition. So far, so usual, right?

While the specific thread was not particularly edifying, and I’ll grant that my tweets were not perfectly pitched for the specific audience, this is a very modern example of the classic Demarcation Problem (Stanford Encyclopedia of Philosophy) in the philosophy of science.

[Read more…] about The modern demarcation problem

Filed Under: Climate Science, Communicating Climate, Featured Story, Scientific practice Tagged With: misinformation

Another dot on the graph

15 Jan 2022 by Gavin

So last week was the annual release of the temperature records from NASA, NOAA and Berkeley Earth. The Copernicus ERA5 data was released a few days ago, and the HadCRUT data will follow soon. Unlike in years past, there is no longer any serious discrepancy between the records – which use multiple approaches for the ocean temperatures, the homogenization of the weather stations records, and interpolation.

Depending on the product, 2021 was either the 5th, 6th or 7th warmest year, but in all cases, it is part of the string of warm years (since 2015) that have all been more than 1ºC warmer than the late 19th C.

[Read more…] about Another dot on the graph

Filed Under: Aerosols, Climate Science, Communicating Climate, El Nino, Greenhouse gases, Instrumental Record

“Don’t Look Up”

1 Jan 2022 by Gavin

The highlight of the movie season for climate science has clearly been the release on Dec 24th 2021 of “Don’t Look Up”. While nominally about a different kind of disaster – the discovery of a comet heading to Earth on a collision course – the skewering of our current science-policy dysfunction transcends the specifics and makes a powerful metaphor for climate change, and even the ongoing COVID-19 pandemic.

[Read more…] about “Don’t Look Up”

Filed Under: Climate Science, Communicating Climate, coronavirus, Scientific practice

Deciphering the ‘SPM AR6 WG1’ code

12 Aug 2021 by rasmus

I followed with great interest the launch of the sixth assessment report Working Group 1 (The Physical Science Basis) from the Intergovernmental Panel on Climate Change (IPCC) on August 9th. 

The main report is quite impressive (see earlier posts here, here, here, and here) but the press conference didn’t come across as being focused and well-prepared. In my opinion the press conference on 9 August 2021 didn’t do justice to the vast effort that went into it.

[Read more…] about Deciphering the ‘SPM AR6 WG1’ code

Filed Under: Communicating Climate, Reporting on climate

The IPCC Sixth Assessment Report

9 Aug 2021 by group

Climate scientists are inordinately excited by the release of a new IPCC report (truth be told, that’s a bit odd – It’s a bit like bringing your end-of-(seven)-year project home and waiting anxiously to see how well it will be received). So, in an uncharacteristically enthusiastic burst of effort, we have a whole suite of posts on the report for you to read.

  • AR6 of the Best. Half a dozen takeaways from the report from Gavin
  • New (8/13): Sea Level Rise in AR6 from Stefan
  • A Tale of Two Hockey Sticks by Mike
  • #NotAllModels discusses the use (and mis-use) of the CMIP6 ensemble by Gavin
  • We are not reaching 1.5ºC earlier than previously thought from guest authors Malte Meinshausen, Zebedee Nicholls and Piers Forster
  • New (8/12): Deciphering the SPM AR6 WG1 Code by Rasmus
  • New (8/12): A deep dive into the IPCC’s updated carbon budget numbers from guest author Joeri Rogelj

If/when we add some more commentary as we digest the details and we see how the report is being discussed, we’ll link it from here. Feel free to discuss general issues with the report in the comments here, and feel free to suggest further deep dives we might pursue.

Filed Under: Climate impacts, Climate modelling, Climate Science, Communicating Climate, Greenhouse gases, In the News, Instrumental Record, IPCC, Paleoclimate, Sea level rise

Climate adaptation should be based on robust regional climate information

25 Jul 2021 by rasmus

Climate adaptation steams forward with an accelerated speed that can be seen through the Climate Adaptation Summit in January (see previous post), the ECCA 2021 in May/June, and the upcoming COP26. Recent extreme events may spur this development even further (see previous post about attribution of recent heatwaves). 

To aid climate adaptation, Europe’s Climate-Adapt programme provides a wealth of resources, such as guidance, case studies and videos. This is a good start, but a clear and transparent account on how to use the actual climate information for adaptation seems to be missing. How can projections of future heatwaves or extreme rainfall help practitioners, and how to interpret this kind of information? 

[Read more…] about Climate adaptation should be based on robust regional climate information

Filed Under: Climate impacts, Climate modelling, Climate Science, climate services, downscaling, heatwaves, hydrological cycle, Solutions, statistics

A potential rule of thumb for hourly rainfall?

20 Mar 2021 by rasmus

Future global warming will be accompanied by more intense rainfall and flash floods due to increased evaporation, as a consequence of higher surface temperatures which also lead to a higher turn-around rate for the global hydrological cycle. In other words, we will see changing rainfall patterns. And if the global area of rainfall also shrinks, then a higher regional concentration of the rainfall is bound to lead to more intense downpours (the global rainfall indicator is discussed here). 

[Read more…] about A potential rule of thumb for hourly rainfall?

Filed Under: Climate impacts, Climate Science, climate services, hydrological cycle, Solutions, statistics

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