The accompanying press release focused on the report’s section about climate change. It warned that, “even if the Paris Agreement goals are met, Arctic winter temperatures will increase 3-5°C by 2050 compared to 1986-2005 levels” and will warm 5-9°C by 2080.
Greta Thunberg cut a frail and lonely figure when she started a school strike for the climate outside the Swedish parliament building last August. Her parents tried to dissuade her. Classmates declined to join. Passersby expressed pity and bemusement at the sight of the then unknown 15-year-old sitting on the cobblestones with a hand-painted banner.
Experts at the park service and elsewhere say that local conditions of daylight and heat are the main factors that determine the blooming time in temperate ecosystems. However, they say that although bloom times can vary from year to year because of those local conditions, the long-term trends clearly show the impact of climate change on the trees in Washington, D.C., and elsewhere.
The Green New Deal borrows its name and ethos from the New Deal – introduced in the 1930s by then US president Franklin D Roosevelt to kickstart an economy crippled by the Great Depression. But are strategies which echo the needs of the 1930s and 1940s – ending the Depression and defeating Nazism – suitable for the rapid transition from fossil fuels that defines our needs in the early 21st century?
This modern temperature reconstruction, combined with observational records over the past century, shows that current temperatures in Greenland are warmer than any period in the past 2,000 years. That said, they are likely still cooler than during the early part of the current geological epoch – the Holocene – which started around 11,000 years ago.