I'm a Day Hiker. Here's How I Explored (and Endured) America's Remotest National Park for ...
The Alatna River—one of six National Wild and Scenic Rivers in Gates of the Arctic National Park and Preserve, the highest ...
Arctic Sea Ice18 小时
GLIMS Glacier Database, Version 1
The GLIMS initiative has created a unique glacier inventory, storing information about the extent and rates of change of all the world's mountain glaciers and ice caps. The GLIMS Glacier Database was ...