Climate scientists urge Obama to rule out more Arctic oil and gas exploration

Letter asking the president to prevent future hunting for oil in the waters follows a series of new heat and melting records in the Arctic, which stunned researchers

Nearly 400 international scientists called on Barack Obama to rule out further expansion of oil and gas exploration in Arctic waters under US control.

The letter, signed by prominent Arctic, marine and climate specialists - including a former member of Obama's administration, urges the president to rule out any future hunting for oil in the waters of the Chukchi and Beaufort seas.