Robert McLachlan
@robertmclachlan.bsky.social
New Zealand mathematician, writing on climate & the environment at http://planetaryecology.org
January 15, 2026 at 1:54 AM
In 2025 Auckland had the two most-anomalously warm days on record, 27 November (7.2 ºC above the November average) and 4 July (6.6 ºC above the July average).
To be 7.2 ºC above average is quite remarkable as >5 ºC has only been reach 67 times since 1962 and >6 ºC 7 times.
To be 7.2 ºC above average is quite remarkable as >5 ºC has only been reach 67 times since 1962 and >6 ºC 7 times.
January 14, 2026 at 11:40 PM
In 2025 Auckland had the two most-anomalously warm days on record, 27 November (7.2 ºC above the November average) and 4 July (6.6 ºC above the July average).
To be 7.2 ºC above average is quite remarkable as >5 ºC has only been reach 67 times since 1962 and >6 ºC 7 times.
To be 7.2 ºC above average is quite remarkable as >5 ºC has only been reach 67 times since 1962 and >6 ºC 7 times.
January 13, 2026 at 2:59 AM
See also these charts, more here: reneweconomy.com.au/too-late-too...
January 12, 2026 at 3:12 AM
See also these charts, more here: reneweconomy.com.au/too-late-too...
See also this from 1834
January 10, 2026 at 8:20 PM
See also this from 1834
NZ's fossil-free electricity streak just ended, 23 Dec to 8 Jan!
That is a low-demand period.
Perhaps we can do even better next year.
That is a low-demand period.
Perhaps we can do even better next year.
January 9, 2026 at 8:09 AM
NZ's fossil-free electricity streak just ended, 23 Dec to 8 Jan!
That is a low-demand period.
Perhaps we can do even better next year.
That is a low-demand period.
Perhaps we can do even better next year.
Looks like 2025 will come in close to 2021. Auckland was particularly hot in 2025, nearly a full 1 ºC above its 2000-2019 average (cf. 0.5 ºC in most other places about 0.5 ºC)
January 9, 2026 at 8:07 AM
Looks like 2025 will come in close to 2021. Auckland was particularly hot in 2025, nearly a full 1 ºC above its 2000-2019 average (cf. 0.5 ºC in most other places about 0.5 ºC)
Yes, it does suggest a shift in the market like a growth in tourism from Australia & falls elsewhere. Extra context – the Queenstown Lakes district has a goal of net zero tourism emissions by 2030, including international aviation. I'm not sure what they have done about it, if anything.
January 9, 2026 at 12:25 AM
Yes, it does suggest a shift in the market like a growth in tourism from Australia & falls elsewhere. Extra context – the Queenstown Lakes district has a goal of net zero tourism emissions by 2030, including international aviation. I'm not sure what they have done about it, if anything.
1287 Teslas sold in 2024, 1596 in 2025. It remains the best-selling BEV.
January 8, 2026 at 8:38 PM
1287 Teslas sold in 2024, 1596 in 2025. It remains the best-selling BEV.
The miracle of the wire service! The rest of the "Science News and Notes" in that issue are a real grab bag. See: blog.planetaryecology.org/2025/12/31/a...
A partial reckoning
By Robert McLachlan Climate action continues in Aotearoa New Zealand As 2025 winds to a close, I am writing from the Rodney district north of Auckland – Rodney being famous as the home of the Rodne…
blog.planetaryecology.org
January 6, 2026 at 4:11 AM
The miracle of the wire service! The rest of the "Science News and Notes" in that issue are a real grab bag. See: blog.planetaryecology.org/2025/12/31/a...