Asriel Wilde (they/them)

Interesting to see so many great British patriots right now begging an American president to bankrupt one of Britain’s last remaining truly national institutions.

The report’s authors highlight how countries would need to show comparable rates of year-on-year decline to keep warming below the 1.5ºC target set out in the 2015 Paris climate agreement.

(7/9)🧵
(Ref. 1)

However severe lockdowns and slow deconfinements (as have been announced in the UK 🇬🇧, Norway 🇳🇴 and France 🇫🇷), coupled with the socioeconomic effects of low social confidence and trauma, could cause the annual decrease in emissions in 2020 to be -7.5% (-2,729MtCO2).

(6/9)🧵
(Refs. 1, 4)

It remains to be seen how emissions will continue to evolve across 2020, which are likely dependent on the length and severity of lockdowns globally.

If activities return to normal by mid-June, total 2020 emissions will likely be -4.2% (-1524 MtCO2) relative to 2019...

(5/9)🧵
(Ref. 1)

⚡️ #power has seen a 15% reduction in daily emissions relative to 2019,
🏭 #industry -35%,
🚗 surface #transport -50%,
✈️ and #aviation has seen the largest reduction in emissions, at 75%.
The 🏘 residential sector has seen a modest increase in emissions by 5%.

(4/9)🧵
(Ref. 1, 3)

The study compared 2019 economic activity data and associated CO2 emissions with those from 2020 from six sectors of the economy to determine how Covid has affected emissions.

4/5 sectors analysed showed a decline in daily emissions relative to 2019 levels:

(3/9)🧵
(Ref. 1)

The groundbreaking new study, encompassing 85% of the world's population and 97% of global #CO2emissions, shows lockdowns have reduced daily emissions by 17% globally, equivalent to reducing daily emissions back to 2006 levels! 🗓

(2/9)🧵
(Refs. 1, 2)

🌎 Let's take a look back at when Cyclone Errol was heading towards the coast of Western Australia on 16 April.

In this @copernicusecmwf.bsky.social Sentinel-3 image, the typical pinhole eye – a small, well-defined eye often associated tropical cyclones – is clearly visible.

Line graph time series of 2025's daily Arctic sea ice extent compared to decadal averages from the 1980s to the 2010s. The decadal averages are shown with different colored lines with purple for the 1980s, blue for the 1990s, green for the 2000s, and white for the 2010s. Thin white lines are also shown for each year from 2000 to 2024. 2025 is shown with a thick gold line. There is a long-term decreasing trend in ice extent for every day of the year shown on this graph between August and November by looking at the decadal average line positions.

Monday ice update - #Arctic sea ice extent is currently the 9th lowest on record (JAXA data) 🧪

• about 30,000 km² above the 2010s mean
• about 1,010,000 km² below the 2000s mean
• about 2,190,000 km² below the 1990s mean
• about 2,880,000 km² below the 1980s mean

More: zacklabe.com/arctic-sea-i...

The blue Pleiades star cluster at centre. Many other star dots.

The Pleiades (M45). 29 September 2025. 🔭 🧪 🎨 #astrophotography #SciArt #photography #StormHour #ThePhotoHour

Global warming caused by humans is an observed fact. Yes, science still needs to learn more, but it's no more in overall doubt than the theory of gravity. And it's bad. Willful ignorance, enforced by those who choose to deny science, is an existential threat to our civilization.

Detection of 85 new active subglacial lakes in Antarctica from a decade of CryoSat-2 data - Nature Communications Wilson and colleagues identify 85 previously undocumented lakes beneath the Antarctic Ice Sheet. These subglacial lakes fill and drain with a variety of patterns, revealing interconnected hydrological pathways channeling large volumes of water under the ice sheet.

A paper in Nature Communications identifies 85 previously undocumented lakes beneath the Antarctic Ice Sheet. These subglacial lakes fill and drain with a variety of patterns, revealing interconnected hydrological pathways channeling large volumes of water under the ice sheet. ⚒️ 🧪

5. Presidencia de la República Mexicana (2015) ‘COP21 participants - 30 Nov 2015’. Via Wikimedia Commons.

commons.wikimedia.org/wiki/File:CO...

4. Pippa Fowles/No. 10 Downing Street (2020) 'Boris Johnson Covid-19 presser'. Via Wikimedia Commons.

commons.wikimedia.org/wiki/File:Bo...

3. Mx. Grainger (2020) 'Nearly empty international departures area at PEK [Beijing International Airport] amid the COVID-19 pandemic'. Via Wikimedia Commons.

commons.wikimedia.org/wiki/File:Ne...

2. Pierre Marshall (2021) 'Leicester coronavirus tier 4 alert warning, Horsefair street'. Via Wikimedia Commons.

commons.wikimedia.org/wiki/File:Le...

Temporary reduction in daily global CO2 emissions during the COVID-19 forced confinement - Nature Climate Change COVID-19 pandemic lockdowns have altered global energy demands. Using government confinement policies and activity data, daily CO2 emissions have decreased by ~17% to early April 2020 against 2019 levels; annual emissions could be down by 7% (4%) if normality returns by year end (mid-June).

References:

1. Le Quére, C. et al. (2020) 'Temporary reduction in daily global CO2 emissions during the COVID-19 forced confinement'. Nature Climate Change.

doi.org/10.1038/s41558-020-0797-x.

However, the paper also shows that the high pollution sectors like surface transport are responsive to changes in government policy 🏛 and economic demand 📉.

Emissions reductions are possible, though do you think we are up to the challenge?

(9/9)🧵
(Ref. 1)

While significant, the reduction in 2020 CO2 emissions is likely to be temporary, and emissions are likely to return to usual, if not exceed 2020 levels with calls to delay Green New Deal programmes.

(8/9)🧵
(Refs. 1, 5)

The report’s authors highlight how countries would need to show comparable rates of year-on-year decline to keep warming below the 1.5ºC target set out in the 2015 Paris climate agreement.

(7/9)🧵
(Ref. 1)

However severe lockdowns and slow deconfinements (as have been announced in the UK 🇬🇧, Norway 🇳🇴 and France 🇫🇷), coupled with the socioeconomic effects of low social confidence and trauma, could cause the annual decrease in emissions in 2020 to be -7.5% (-2,729MtCO2).

(6/8)🧵
(Refs. 1, 4)

It remains to be seen how emissions will continue to evolve across 2020, which are likely dependent on the length and severity of lockdowns globally.

If activities return to normal by mid-June, total 2020 emissions will likely be -4.2% (-1524 MtCO2) relative to 2019...

(5/8)🧵
(Ref. 1)

⚡️ power has seen a 15% reduction in daily emissions relative to 2019,
🏭 industry -35%,
🚗 surface transport -50%,
✈️ and aviation has seen the largest reduction in emissions, at 75%.

The 🏘 residential sector has seen a modest increase in emissions by 5%.

(4/8)🧵
(Ref. 1, 3)

The study compared 2019 economic activity data and associated CO2 emissions with those from 2020 from six sectors of the economy to determine how Covid has affected emissions.

4/5 sectors analysed showed a decline in daily emissions relative to 2019 levels:

(3/8)🧵
(Ref. 1)

The groundbreaking new study, encompassing 85% of the world's population and 97% of global CO2 emissions, shows lockdowns have reduced daily emissions by 17% globally, equivalent to reducing daily emissions back to 2006 levels! 🗓

(2/8)🧵
(Refs. 1, 2)