Karl Mathiesen Profile picture
Senior climate correspondent, @POLITICOEurope. Get in touch at kmathiesen@politico.eu. DMs open. Ask for signal, protonmail. From lutruwita.
Mar 18, 2023 16 tweets 5 min read
In this detail you can see something remarkable. After European colonisers arrived in the Americas the global temperature plunges. This is what is referred to as the Little Ice Age. But what happened and why does it matter to us today? During the 17th century winters in Europe were often exceptionally cold. Famously, fairs were held on the frozen Thames in London.
Feb 10, 2023 9 tweets 3 min read
In the 1990s Nepal handed management of its forests back to villages.

Since then, the country's forest cover has nearly doubled.
earthobservatory.nasa.gov/images/150937/… A Nasa-funded study found that one community forest (called Devithan or sacred grove in Nepali) had only 12% forest cover in 1988, in 2016 it was 92%.
Jan 16, 2023 9 tweets 3 min read
The prospect of a long-delayed El Niño returning later this year is something that should give the world a collective shudder. These natural oscillations are related to events of tremendous violence. With climate change, we can expect those extremes to be redoubled.
THREAD -> Globally El Niños are typically very hot years. So generally we'll see heat extremes go up. See how El Niños stands on the shoulders of the rising global temperature. While La Ninas (which we've just had three of in a row) keep things generally cooler.
Jul 25, 2022 10 tweets 3 min read
Europe’s not ready for a hotter world

In the heat of the past month, 2,000 are dead in Spain and Portugal alone, response systems were inadequate and infrastructure buckled (in some cases literally).

THREAD (or better yet read the piece)

politico.eu/article/europe… Planning for a hotter present is also inadequate.

POLITICO’s analysis of EU national disclosures on climate adaptation found 20 out of 27 countries provided either limited or no detail on their spending plans.
Jul 16, 2022 63 tweets 19 min read
The coming days in Europe are likely to see one of the continent's most extreme climate disasters. I'll try to track as many of the heat records, public statements, scientists, fire warnings and reporting here.

Europe's hottest week — a THREAD 🔥 fires in 🇪🇸 🇵🇹 🇫🇷

Copernicus is the EU's satellite monitoring system. They will provide updates as the fires expand or shift and send warnings to communities.

Sep 21, 2021 10 tweets 4 min read
BREAK: Xi Jinping says China will stop building coal plants overseas. This almost completely ends the international finance of coal in a single sentence. For reference, from endcoal.org/finance-tracke…

South Korea and Japan have committed to the same this year.