The sea ice coverage of Arctic reaches its maximum extend, which is the smallest since 2004, on March 21, the 80th day of 2025, only 1 day earlier than 2012.

After nearly 5 months, the sea ice coverage of Arctic decreased normally. But the sea ice over the northeast passage is melting relatively fast.

Arctic sea ice coverage daily monitoring since 2004 shows fast decreasing from June to mid-August 2005.

Arctic sea ice coverage days and extend monitoring shows the sea ice over the northeast passage being relatively less with full accessibility throughout the passage.

Accessibility throughout the northeast passage from 2004 to 2025 shows the passage being accessible on the 219th day, which is the 4th earlier with 17 days ahead of yearly average time.

Accessibility throughout the northeast passage in 2025 shows less apparently less broken floating ice in several critical places.