iiinova — where your digital self keeps evolving

William F. Lamb @wflamb.bsky.social · 29/06/2026

This weekend I learned that even with: - good insulation - window shutters - triple glazing on half our windows (double on the rest) - maximum night-time ventilation ...there is no way to keep our flat naturally cool over such an extended heatwave

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William F. Lamb @wflamb.bsky.social · 24/04/2026

Which could be interesting for policy analysis as we head into more supply shocks... github.com/lambwf/Tidy-...

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William F. Lamb @wflamb.bsky.social · 24/04/2026

This means you can figure out more precisely the share of different fossil fuels in total national GHG emissions... github.com/lambwf/Tidy-...

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William F. Lamb @wflamb.bsky.social · 16/06/2025

Some impressively complete data from Nepal in the latest version

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William F. Lamb @wflamb.bsky.social · 16/06/2025

Just did a small update of Tidy GHG Inventories: lambwf.github.io/Tidy-GHG-Inv... 81 countries have now submitted inventory data with their Biennial Transparency Reports. Quite a few still haven't (its 6 months past the deadline btw).

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William F. Lamb @wflamb.bsky.social · 20/05/2025

The land use change (LULUCF) sector is pretty confusing, since it can be a source of emissions (deforestation, disturbances) as well as a source of removals (regrowth, management). Including LULUCF can speed up, slow down, or change the overall dynamic of economy-wide emissions.

A dot plot comparing the change in national GHG emissions over the past 5 years with (x axis) and without (y axis) the LULUCF sector

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William F. Lamb @wflamb.bsky.social · 24/04/2025

Greenhouse gas emissions are still mostly from fossil fuels by the way!! lambwf.github.io/UNEP-Gap-Rep...

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William F. Lamb @wflamb.bsky.social · 16/04/2025

And here one on energy demand from @ember-energy.org ember-energy.org/latest-insig...

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William F. Lamb @wflamb.bsky.social · 16/04/2025

Interesting that people are starting to incorporate these counterfactuals in their emissions reporting. Here's a similar take from the @iea.org www.iea.org/reports/glob...

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William F. Lamb @wflamb.bsky.social · 09/04/2025

Lots more figures here: lambwf.github.io/Tidy-GHG-Inv...

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William F. Lamb @wflamb.bsky.social · 09/04/2025

I've updated the Tidy GHG Inventories dataset, which is now complete for Annex I countries: doi.org/10.5281/zeno... This also shows the progress to date in countries submitting Biennial Transparency Reports under the Paris Agreement ⬇️

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William F. Lamb @wflamb.bsky.social · 14/03/2025

This looks like a very interesting piece on interest groups at the COPs www.nature.com/articles/s41...

Sankey diagram representing fossil fuel companies and lobbyists and their nominators at COP28

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William F. Lamb @wflamb.bsky.social · 07/03/2025

I asked CLARA - @oxfordsmithschool.bsky.social's new LLM trained on historical climate obstruction documents - about fossil fuel companies' internal discussions and strategies on carbon dioxide removal 😬 clara-research.com

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William F. Lamb @wflamb.bsky.social · 17/02/2025

Sweden is one of a handful of countries that has been reporting net negative GHG emissions for a number of years. lambwf.github.io/Tidy-GHG-Inv... If you are wondering "how is that possible?" its because the definition of land use change removals in inventories is very inclusive...

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William F. Lamb @wflamb.bsky.social · 14/02/2025

Here is a minimal explanation from the gap report. For more info see essd.copernicus.org/articles/15/... or www.nature.com/articles/s41... or @giacgrassi.bsky.social !

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William F. Lamb @wflamb.bsky.social · 14/02/2025

Here is the issue that has caused so many headaches among climate mitigation researchers - inventory estimates of net land use change emissions differ substantially from global bookkeeping models. lambwf.github.io/UNEP-Gap-Rep...

A figure showing the 7.1 GtCO2 gap between inventory estimates of net land use change estimates and global bookkeeping model estimates.

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William F. Lamb @wflamb.bsky.social · 13/02/2025

I revamped my page with ghg emissions plots and data from the UNEP Emissions Gap Report. 👇 lambwf.github.io/UNEP-Gap-Rep... I'll be adding to this a bit in the coming months.

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William F. Lamb @wflamb.bsky.social · 17/01/2025

Even the Vatican! (Those industry process emissions are HFCs from fridges and aircon btw).

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William F. Lamb @wflamb.bsky.social · 17/01/2025

To compare, a few other countries doing a top job with their submissions, despite lower national incomes and/or arguably less well staffed statistical offices...

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William F. Lamb @wflamb.bsky.social · 17/01/2025

China's latest national GHG inventory submission (common reporting table) to the UNFCCC ... 🤔

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William F. Lamb @wflamb.bsky.social · 17/01/2025

Heres what happens when you have a major wildfire event and still account for it in your inventory: Portugal 2017 (~18MtCO2)

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William F. Lamb @wflamb.bsky.social · 16/01/2025

Presumably re-growth after prior fire events. I need to do some more digging about how these are estimated in practice, though. And yeah, good point about "natural". There are many unresolved issues there... here is a box we wrote in the UNEP Gap Report 2024.

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William F. Lamb @wflamb.bsky.social · 16/01/2025

Countries can classify emissions from wildfires (and subsequent removals from regrowth) as a memo item in their national greenhouse gas inventories, excluding them from the total. So far Australia and Canada have done this - including Australia's massive 2020 wildfire.

A graphic showing national greenhouse gas emissions of Australia and Canada from 1990 to 2022, based on data from their national GHG inventories. Emissions and removals are also shown for the inventory memo "natural disturbances on managed land", which would influence national totals if they were included. The 2020 wildfire in Australia released GHG emissions equivalent to all anthropogenic emissions that year - but a full accounting of the event should also take into account removals from subsequent regrowth, as shown in later years.

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William F. Lamb @wflamb.bsky.social · 19/12/2024

Two job positions are open to join our team in Berlin. Join us and help to cast a critical eye on progress in carbon dioxide removal and climate mitigation policy making: tinyurl.com/PIKpolicyana... tinyurl.com/PIKpostdoc

A converted red brick industrial building in front of an old gas works. Now the offices of MCC Berlin / PIK in Schöneberg Berlin, where candidates will be working with us.

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William F. Lamb @wflamb.bsky.social · 21/11/2024

Indonesia emissions - hopefully phasing out coal doesn't mean phasing in bioenergy. Do we know more about what exactly the "75 gigawatts (GW) of renewable energy" target means? lambwf.github.io/UNEP-Gap-Rep...

A figure showing the greenhouse gas emissions of Indonesia from 1990 to 2023. Land use emissions make up a large portion of the total.

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William F. Lamb @wflamb.bsky.social · 21/11/2024

A postcard from the future in multiple ways - I think this will be one of the first countries where we get to see if the frontier of decarbonisation can push into other sectors lambwf.github.io/UNEP-Gap-Rep...

A figure showing large reductions in Denmark's GHG emissions, driven almost entirely by power sector decarbonisation. Emissions in other sectors (transport, agriculture, buildings, industry and waste) have remained stable.

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William F. Lamb @wflamb.bsky.social · 14/11/2024

When countries update their NDCs in the next year, it would be cool if they told us how much carbon dioxide removal they have in mind... iopscience.iop.org/article/10.1... #COP29

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William F. Lamb @wflamb.bsky.social · 12/11/2024

I like that you can grab aggregate emissions data by gas and sector from the summary sheets (tabs 47-49!!)

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William F. Lamb @wflamb.bsky.social · 29/10/2024

European Union GHG emissions lambwf.github.io/UNEP-Gap-Rep...

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William F. Lamb @wflamb.bsky.social · 28/10/2024

First dog on the moon not pulling many punches today www.theguardian.com/commentisfre...

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William F. Lamb @wflamb.bsky.social · 06/10/2024

Honourable mention for this remarkable book on the essentially brutal life in the 19th century shipping trade

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William F. Lamb @wflamb.bsky.social · 06/10/2024

4. Pacific outriggers. There are seemingly a huge number of designs. I'd like to learn more (send links! and books!). Look at this Paraw from the Philippines.

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William F. Lamb @wflamb.bsky.social · 06/10/2024

3. Small open craft like this Caledonia Yawl, based on Scottish and Norwegian designs. Seems crazy but these could handle the open ocean around Shetland and the north Atlantic. Ken Duxbury writes about sailing a small open craft from Greece to Scotland in The Lugworm Chronicles.

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William F. Lamb @wflamb.bsky.social · 06/10/2024

2. Pilot cutters. Made for staying afloat and dropping off pilots in the Bristol Channel and other Atlantic waters. John Muir has a first hand account of life on these in Messing About in Boats. I'll never understand why harbours are filled with white plastic super yachts while these exist!

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William F. Lamb @wflamb.bsky.social · 06/10/2024

Re-creating an old thread from Twitter: here is a random list of sailing boats (and nautical literature) that ought to make a climate-friendly comeback for business and leisure: 1. Windjammers! Made for moving stuff between continents. Immortalised in The Last Grain Race by Eric Newby.

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William F. Lamb @wflamb.bsky.social · 25/09/2024

Reasons why emissions went up last year

Emissions increased in China, India and international aviation, and decreased in the EU, USA, Japan and the land use sector

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William F. Lamb @wflamb.bsky.social · 26/10/2023

🚨 Attention climate researchers 🚨 This is what we need to be working on !! 👇 www.ijhpm.com/article_4440...

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