USGS hydrologist Tim Cowdery titrates water alkalinity in a mobile sampling van using an electronic field form.
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USGS Hydrologist at Work, Glacial Ridge Refuge
USGS hydrologist Tim Cowdery titrates water alkalinity in a mobile sampling van using an electronic field form.
Prairie at Glacial Ridge Refuge
Beach-ridge prairie at Glacial Ridge National Wildlife Refuge
Beach-ridge prairie at Glacial Ridge National Wildlife Refuge
Groundwater Sampling, Glacial Ridge National Wildlife Refuge
Groundwater Sampling, Glacial Ridge National Wildlife RefugeUSGS technician Jody Hulne collects a groundwater nutrient sample at Glacial Ridge National Wildlife Refuge.
Groundwater Sampling, Glacial Ridge National Wildlife Refuge
Groundwater Sampling, Glacial Ridge National Wildlife RefugeUSGS technician Jody Hulne collects a groundwater nutrient sample at Glacial Ridge National Wildlife Refuge.
Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River
Arctic National Wildlife Refuge-1002 Area near the Sadlerochit RiverNorthward view in central Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River showing gently rolling topography typical of the southern coastal plain and meandering creek.
Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River
Arctic National Wildlife Refuge-1002 Area near the Sadlerochit RiverNorthward view in central Arctic National Wildlife Refuge-1002 Area near the Sadlerochit River showing gently rolling topography typical of the southern coastal plain and meandering creek.
along Sabbath Creek, a tributary of the Jago River
along Sabbath Creek, a tributary of the Jago RiverNorthward view towards Kaktovik from southeastern Arctic National Wildlife Refuge-1002 Area. Location is along Sabbath Creek, a tributary of the Jago River.
along Sabbath Creek, a tributary of the Jago River
along Sabbath Creek, a tributary of the Jago RiverNorthward view towards Kaktovik from southeastern Arctic National Wildlife Refuge-1002 Area. Location is along Sabbath Creek, a tributary of the Jago River.
Well head of Sourdough oil discovery on Alaska state lease
Well head of Sourdough oil discovery on Alaska state leaseWell head of Sourdough oil discovery on Alaska state lease less than one mile west of Arctic National Wildlife Refuge-1002 Area showing minimal disturbance of permafrost polygons.
Well head of Sourdough oil discovery on Alaska state lease
Well head of Sourdough oil discovery on Alaska state leaseWell head of Sourdough oil discovery on Alaska state lease less than one mile west of Arctic National Wildlife Refuge-1002 Area showing minimal disturbance of permafrost polygons.
Sandhill Cranes at Glacial Ridge National Wildlife Refuge
Sandhill Cranes at Glacial Ridge National Wildlife RefugeSandhill Crane Pair in flight at Glacial Ridge National Wildlife Refuge
Sandhill Cranes at Glacial Ridge National Wildlife Refuge
Sandhill Cranes at Glacial Ridge National Wildlife RefugeSandhill Crane Pair in flight at Glacial Ridge National Wildlife Refuge
View to the southeast from near the Canning River Delta
View to the southeast from near the Canning River DeltaView to the southeast from near the Canning River Delta. Visible in foreground are permafrost polygons cut by caribou trails.
Arctic National Wildlife Refuge
View to the southeast from near the Canning River Delta
View to the southeast from near the Canning River DeltaView to the southeast from near the Canning River Delta. Visible in foreground are permafrost polygons cut by caribou trails.
Arctic National Wildlife Refuge
Canning River Delta with thin barrier island and ice pack
Canning River Delta with thin barrier island and ice packNorthward view to coast of Canning River Delta with thin barrier island and ice pack beyond.
Canning River Delta with thin barrier island and ice pack
Canning River Delta with thin barrier island and ice packNorthward view to coast of Canning River Delta with thin barrier island and ice pack beyond.
Camden Bay from west-central ANWR-1002 Area
Northward view towards Camden Bay from west-central Arctic National Wildlife Refuge-1002 Area near the Katakturuk River. Patterns in foreground are permafrost polygons.
Northward view towards Camden Bay from west-central Arctic National Wildlife Refuge-1002 Area near the Katakturuk River. Patterns in foreground are permafrost polygons.
ANWR-1002 Area near Okerokorik River
Northward view from southeastern corner of Arctic National Wildlife Refuge-1002 Area near Okerokorik River showing gently rolling topography typical of the southern coastal plain.
Northward view from southeastern corner of Arctic National Wildlife Refuge-1002 Area near Okerokorik River showing gently rolling topography typical of the southern coastal plain.
ANWR-1002 Area west of the Aichilik River
View to the northeast from near the eastern boundary of the Arctic National Wildlife Refuge-1002 Area west of the Aichilik River.
View to the northeast from near the eastern boundary of the Arctic National Wildlife Refuge-1002 Area west of the Aichilik River.
oil-saturated sand, sandstone, and concretions along the Jago River
oil-saturated sand, sandstone, and concretions along the Jago RiverGeologists examine oil-saturated sand (unconsolidated), sandstone (dark orange-brown rocks), and concretions (light orange rocks) along the Jago River in the Arctic National Wildlife Refuge-1002 Area, about 18 miles southeast of Kaktovik.
oil-saturated sand, sandstone, and concretions along the Jago River
oil-saturated sand, sandstone, and concretions along the Jago RiverGeologists examine oil-saturated sand (unconsolidated), sandstone (dark orange-brown rocks), and concretions (light orange rocks) along the Jago River in the Arctic National Wildlife Refuge-1002 Area, about 18 miles southeast of Kaktovik.
Fog Over Glacial Ridge Refuge
Fog Over Glacial Ridge National Wildlife Refuge
Fog Over Glacial Ridge National Wildlife Refuge
Monarchback
Danaus plexippus. The Monarch Butterfly. Maryland.
Danaus plexippus. The Monarch Butterfly. Maryland.
Water collected from the lake at the bottom of Halema‘uma‘u
Water collected from the lake at the bottom of Halema‘uma‘uWater collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks.
Water collected from the lake at the bottom of Halema‘uma‘u
Water collected from the lake at the bottom of Halema‘uma‘uWater collected from the lake at the bottom of Halema‘uma‘u is prepared for laboratory analyses at the USGS California Volcano Observatory. Results thus far reveal chemistry indicative of complex reactions among the water, magmatic gases and Kīlauea's basaltic rocks.
Unoccupied Aircraft System is inspected by pilot just before take off
Unoccupied Aircraft System is inspected by pilot just before take offThe sampling mechanism (on blue tarp) is prepared and the Unoccupied Aircraft System (UAS) is inspected just before take off to collect water from the Halema‘uma‘u crater lake. Brightly colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water.
Unoccupied Aircraft System is inspected by pilot just before take off
Unoccupied Aircraft System is inspected by pilot just before take offThe sampling mechanism (on blue tarp) is prepared and the Unoccupied Aircraft System (UAS) is inspected just before take off to collect water from the Halema‘uma‘u crater lake. Brightly colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water.
Unoccupied Aircraft System returning with a water sample.
Unoccupied Aircraft System returning with a water sample.USGS-HVO scientists and DOI UAS team members collect samples of water from the Halema‘uma‘u crater lake.
Unoccupied Aircraft System returning with a water sample.
Unoccupied Aircraft System returning with a water sample.USGS-HVO scientists and DOI UAS team members collect samples of water from the Halema‘uma‘u crater lake.
The Ben Franklin Bridge over the Delaware River.
The Ben Franklin Bridge stretches over the Delaware River. The Delaware River Basin provides water to big cities such as New York and Philadelphia.
The Ben Franklin Bridge stretches over the Delaware River. The Delaware River Basin provides water to big cities such as New York and Philadelphia.
European green crab
European green crab captured in Washington. Green crabs are invasive to the region and adversely impact the local shellfish industry by outcompeting native species.
European green crab captured in Washington. Green crabs are invasive to the region and adversely impact the local shellfish industry by outcompeting native species.
Wild Black Carp
A commercially caught wild black carp from the Mississippi River. Credit: USGS.
A commercially caught wild black carp from the Mississippi River. Credit: USGS.