John Kerry says Trump’s climate policies ‘destroyed’ US credibility on world stage – as it happened

• Biden's climate envoy pledges president will take steps to confront crisis
• Senate passes anti-Asian hate crimes bill
• Thunberg: young people will feel better by acting on climate crisis
• House subcommittee holds hearing on on fossil fuels with activist
• Biden at climate summit: No nation can solve this crisis on our own'
• Analysis: climate summit test for Biden's China watchwords

1.06am BST

- Joan E Greve and Maanvi Singh

12.36am BST

Swirling and meandering ocean currents that help shape the world's climate have gone through a global-scale reorganisation" over the past three decades, according to new research.

The amount of energy in these ocean currents, which can be from 10km to 100km across and are known as eddies, has increased, having as yet unknown affects on the ocean's ability to lock-away carbon dioxide and heat from fossil fuel burning.

Related: Changes to giant ocean eddies could have devastating effects' globally