Aerial slide: Brooks Range mountains valley with dense spruce forests and multibranch streams formed from melted ice and snow in Alaska during summer

portage snowcapped mountains glacier anchorage alaska range nature aerial sliding usa snow melting spruce forest streams summer landscape view brooks tundra terrain snow melting covered multibranch branched flood flooding overflow land clouds peak river global warming ecosystem climate brook massive sky ice scenic wilderness alder change greenpeace relief woodland above vale