Jan Lenaerts

Zillow’s climate risk reversal looks like a setback. It’s really a wake‑up call. When private models sow confusion, it’s a flashing warning sign that Washington needs to fix federal flood maps,

Zillow’s climate score rollback is a wake-up call: build open, future‑conditions federal flood maps -- gold‑standard, trustworthy data for building codes, mortgages, and our future. Column today: open.substack.com/pub/susanpcr...

03.12.2025 13:44 — 👍 135    🔁 61    💬 2    📌 9

A reminder, in light of that NYT story today, about skill and spread across climate analytics providers:

Getting good climate info in the hands of individuals would be highly valuable. Just not convinced we're actually there yet.

30.11.2025 20:19 — 👍 30    🔁 10    💬 0    📌 3

Consulting* with experts, of course.

30.11.2025 20:04 — 👍 1    🔁 0    💬 0    📌 0

Better yet: consisting with experts who know the local conditions and have the experience to interpret, adapt, and translate “global-scale” climate risk outputs to locally reliable information. Modeling quality is one, local applicability is another. Above all, honest communication is essential!

30.11.2025 19:53 — 👍 1    🔁 0    💬 1    📌 0

IMO - this should become part of any regular due diligence in the real estate business. Of course, accurate information is important, but climate risk models are hard to interpret, subject to large uncertainties, and risks hard to communicate (probability vs risk vs occurrence vs intensity).

30.11.2025 19:53 — 👍 1    🔁 0    💬 1    📌 0

As both banks and insurance industry will start to use v granular information for their decision making, too, (which will impact people living or buying in the most vulnerable places most), it is becoming increasingly important for individuals to be informed on climate risks.

30.11.2025 19:53 — 👍 2    🔁 0    💬 1    📌 0

Zillow Removes Climate Risk Scores From Home Listings

The discussion on accuracy here is somewhat moot. I find it most intriguing that this information does seem to go into and does impact individual customer decision making and even house sale price (paper here www.nber.org/papers/w33119).
www.nytimes.com/2025/11/30/c...

30.11.2025 19:53 — 👍 2    🔁 0    💬 1    📌 0

New text @cop30brazil.bsky.social provides a glimpse of where #COP30 might land.

Some reflections on references to science and evidence. /1

unfccc.int/sites/defaul...

22.11.2025 15:42 — 👍 11    🔁 11    💬 1    📌 0

A line graph shows the time series of Arctic mean surface temperature anomalies for each October from 1850 through 2025. There is a long-term increasing trend and large year-to-year variability. The mean surface temperature anomaly in October 2025 was 3.78°C for this region. Anomalies are computed relative to a 1910-2000 climate baseline. All data is from NOAA/NESDIS/NCEI NOAAGlobalTemp v6.0.0 on this graphic.

A line graph shows the time series of Antarctic mean surface temperature anomalies for each October from 1850 through 2025. There is a long-term increasing trend and large year-to-year variability. The mean surface temperature anomaly in October 2025 was 1.43°C for this region. Anomalies are computed relative to a 1910-2000 climate baseline. All data is from NOAA/NESDIS/NCEI NOAAGlobalTemp v6.0.0 on this graphic.

Was there any coverage of the recent record warmth in both the Arctic and Antarctic? Multiple global datasets now confirm these records, and I think it's really quite striking.

Here's some very quick plots showing NOAAGlobalTempv6 data from October too. And see my earlier posts.

22.11.2025 02:20 — 👍 270    🔁 143    💬 10    📌 13

Happy to share our experience organizing the 2022 Firn Workshop! @tridatta.bsky.social

07.11.2025 07:54 — 👍 0    🔁 0    💬 0    📌 0

Assessing future cyclone speeds at the same location across climate analytics vendors. For the same spot, high risk properties range from sub-tropical storm to Cat 5.

Absolutely fantastic study comparing anonymized outputs of climate analytics models.

Everyone loves to bag on flood (rightly so), but can we talk about how the spread here is "30mph breeze to Cat 5 hurricane" www.fca.org.uk/publication/... HT @ruarirhodes.bsky.social

24.10.2025 18:09 — 👍 49    🔁 17    💬 4    📌 4

DOEresponseSite On July 29, 2025, the Department of Energy (DOE) published a report from its Climate Working Group (CWG). This report features prominently in the EPA's reconsideration of its 2009 Endangerment Finding. In response, over 85 scientists have come together to write a comprehensive review, which is

Our 400+ page comment on the DOE climate working group report is now out.

Our conclusion: The merchants of doubt are back, and they're coming for climate science.

02.09.2025 13:24 — 👍 457    🔁 228    💬 17    📌 27

‘Tipping points’ confuse and can distract from urgent climate action - Nature Climate Change The tipping points framing is widely used in climate discussions but receives mixed feedback. This Perspective critiques it for oversimplifying the complexities of natural and social systems and faili...

This resonates a lot with me. The tipping points topic is one of the most popular ones for private sector, but is largely irrelevant for their short- to medium-term (20 yrs is typically way too far out!) decision making process around climate resilience and adaptation www.nature.com/articles/s41...

04.12.2024 07:45 — 👍 5    🔁 1    💬 0    📌 0