Beaver dam and lodge on the Ahaliknak Creek, Noatak National Preserve
Beaver dam and lodge on the Ahaliknak Creek, Noatak National PreserveBeaver dam and lodge on the Ahaliknak Creek, Noatak National Preserve
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Beaver dam and lodge on the Ahaliknak Creek, Noatak National Preserve
Beaver dam and lodge on the Ahaliknak Creek, Noatak National Preserve
Beaver dam and lodge on the Ahaliknak Creek, Noatak National PreserveBeaver dam and lodge on the Ahaliknak Creek, Noatak National Preserve
Chilkat River sonar on a bridge
Chilkat River sonar on a bridge
Chilkat River sonar on a bridge
Chilkat River bridge
Chilkat River bridge
Kashwitna River bridge debris
Kashwitna River bridge debris
Kashwitna River bridge debris
Kashwitna River bridge
Kashwitna River bridge
Shublik Spring open water
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Hole in the ice from an auger on Canning River
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Lowering minnow trap to fish
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Canning River with bars
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Minnow trap in icehole
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Michael Carey and Vanessa von Biela on Canning River
Michael Carey and Vanessa von Biela on Canning RiverSupporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Michael Carey and Vanessa von Biela on Canning River
Michael Carey and Vanessa von Biela on Canning RiverSupporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Canning River with bars view
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Vanessa von Biela with cut bank at Canning River
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Copper River sonar on a bridge
Copper River sonar on a bridge
Copper River sonar on a bridge
Canning River with Brooks Range in the background
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Supporting the project of winter habitat of juvenile Dolly Varden in the Canning River.
Knik River bridge aerial view
Knik River bridge aerial view
Knik River bridge aerial view
Twentymile River bridge
Twentymile bridge
Orthophotomosaic image, north coast of Barter Island, July 1, 2014
Orthophotomosaic image, north coast of Barter Island, July 1, 2014Aerial photographs were collected from a small, fixed-wing aircraft over the coast of Barter Island, Alaska on July 01 2014, September 07 2014. Precise aircraft position information and structure-from-motion photogrammetric methods were combined to derive a high-resolution orthophotomosaic.
Orthophotomosaic image, north coast of Barter Island, July 1, 2014
Orthophotomosaic image, north coast of Barter Island, July 1, 2014Aerial photographs were collected from a small, fixed-wing aircraft over the coast of Barter Island, Alaska on July 01 2014, September 07 2014. Precise aircraft position information and structure-from-motion photogrammetric methods were combined to derive a high-resolution orthophotomosaic.
Evidence of turbidity currents in Eklutna Lake
USGS scientists, working with researchers from the University of Ghent, probed the floor of Eklutna Lake, Anchorage Borough, Alaska, for evidence of turbidity currents triggered by strong shaking during the 2018 Mw7.1 Anchorage earthquake.
USGS scientists, working with researchers from the University of Ghent, probed the floor of Eklutna Lake, Anchorage Borough, Alaska, for evidence of turbidity currents triggered by strong shaking during the 2018 Mw7.1 Anchorage earthquake.
Tipping trees on top of permafrost in Innoko National Wildlife Refuge, AK
Tipping trees on top of permafrost in Innoko National Wildlife Refuge, AKCaption: Trees tipping over and dying as ice-rich permafrost thaws in the Innoko National Wildlife Refuge, Alaska.
Tipping trees on top of permafrost in Innoko National Wildlife Refuge, AK
Tipping trees on top of permafrost in Innoko National Wildlife Refuge, AKCaption: Trees tipping over and dying as ice-rich permafrost thaws in the Innoko National Wildlife Refuge, Alaska.
Thawing Permafrost, Alaska
Thawing permafrost on various peatlands in Alaska. Permafrost thaw results in ground subsidence and inundation that kills black spruce and other understory plants living on the permafrost plateau. The black spruce forests found on permafrost plateaus are replaced with sedge- and moss-dominated bogs and fens, altering the ecosystem structure and function.
Thawing permafrost on various peatlands in Alaska. Permafrost thaw results in ground subsidence and inundation that kills black spruce and other understory plants living on the permafrost plateau. The black spruce forests found on permafrost plateaus are replaced with sedge- and moss-dominated bogs and fens, altering the ecosystem structure and function.