This cyanobacterium has radiating filaments and basal heterocysts. Green is Sytox Green (a DNA stain that is excluded from live cells).
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What's In My Water?
This cyanobacterium has radiating filaments and basal heterocysts. Green is Sytox Green (a DNA stain that is excluded from live cells).
Arctic Ice
Ice is pushed away from the hull of the Coast Guard Cutter Healy Aug. 26, 2009.
Ice is pushed away from the hull of the Coast Guard Cutter Healy Aug. 26, 2009.
Water-quality field sampling, Denali National Park, 2009
Water-quality field sampling, Denali National Park, 2009Water-quality field measurements and sampling, Denali National Park and Preserve, 2009. Photograph by Dan Long, U.S. Geological Survey
Water-quality field sampling, Denali National Park, 2009
Water-quality field sampling, Denali National Park, 2009Water-quality field measurements and sampling, Denali National Park and Preserve, 2009. Photograph by Dan Long, U.S. Geological Survey
Blue Water
The Canadian Coast Guard Ship Louis S. St-Laurent has a mechanical system that creates bubbles that rise to the surface and push ice away from the ship's hull. It also happens to churn the water into an amazing shade of blue.
The Canadian Coast Guard Ship Louis S. St-Laurent has a mechanical system that creates bubbles that rise to the surface and push ice away from the ship's hull. It also happens to churn the water into an amazing shade of blue.
Sea Squirts Grow on Prop Roots
Solitary Sea Squirts grow on prop roots and on the bottom in the mangroves. Tunicates are unusual animals that are classified along with humans and other vertebrates in the Phylum Chordata.
Solitary Sea Squirts grow on prop roots and on the bottom in the mangroves. Tunicates are unusual animals that are classified along with humans and other vertebrates in the Phylum Chordata.
Polar Bear
A polar bear rests on the ice Aug. 23, 2009, after following the Coast Guard Cutter Healy for nearly an hour.P
A polar bear rests on the ice Aug. 23, 2009, after following the Coast Guard Cutter Healy for nearly an hour.P
Polar Bear
A polar bear walks on the Arctic Ocean ice Aug. 23, 2009.
A polar bear walks on the Arctic Ocean ice Aug. 23, 2009.
Frozen Rope
Frost forms on a lanyard aboard the Coast Guard Cutter Healy as the ship operates in the western portion of the Arctic Ocean Aug. 21, 2009.
Frost forms on a lanyard aboard the Coast Guard Cutter Healy as the ship operates in the western portion of the Arctic Ocean Aug. 21, 2009.
Polar Bear
A polar bear walks on the Arctic Ocean ice Aug. 21, 2009.
Photograph taken by Patrick Kelley, U.S. Coast Guard.
A polar bear walks on the Arctic Ocean ice Aug. 21, 2009.
Photograph taken by Patrick Kelley, U.S. Coast Guard.
On Thin Ice
A polar bear slides across thin Actic Ocean ice Aug. 21, 2009.
A polar bear slides across thin Actic Ocean ice Aug. 21, 2009.
Polar Bear
A polar bear walks on the Arctic Ocean ice Aug. 21, 2009.
A polar bear walks on the Arctic Ocean ice Aug. 21, 2009.
Souris River near Westhope, North Dakota, 2009
Souris River near Westhope, North Dakota, August 21, 2009. This picture is provided to compare to other pictures at this gaging location during flooding. Streamflow at this time was approximately 200 cubic feet per second.
Souris River near Westhope, North Dakota, August 21, 2009. This picture is provided to compare to other pictures at this gaging location during flooding. Streamflow at this time was approximately 200 cubic feet per second.
Above the Clouds
The sun shines through the clouds over the Arctic Ocean Aug. 20, 2009.
The sun shines through the clouds over the Arctic Ocean Aug. 20, 2009.
View From Above
A view from above the Arctic Ocean Aug. 20, 2009.
A view from above the Arctic Ocean Aug. 20, 2009.
Shishaldin Volcano at Sunset
Shishaldin Volcano at sunset. Shishaldin is on Unimak Island, part of Izembek National Wildlife Refuge, Alaska.
Shishaldin Volcano at sunset. Shishaldin is on Unimak Island, part of Izembek National Wildlife Refuge, Alaska.
Arctic Sky
The clouds begin to thin over the Arctic Ocean Aug. 19, 2009.
The clouds begin to thin over the Arctic Ocean Aug. 19, 2009.
Layers
The Canadian Coast Guard Ship Louis S. St-Laurent trails the Coast Guard Cutter Healy as the two ships work their way farther north to research the floor of the Arctic Ocean Aug. 19, 2009.
The Canadian Coast Guard Ship Louis S. St-Laurent trails the Coast Guard Cutter Healy as the two ships work their way farther north to research the floor of the Arctic Ocean Aug. 19, 2009.
Arctic Fog
Fog settles over the Arctic Ocean Aug. 19, 2009.
Fog settles over the Arctic Ocean Aug. 19, 2009.
Reflection
The sun turns the Arctic Ocean waters gold Aug. 19, 2009.
The sun turns the Arctic Ocean waters gold Aug. 19, 2009.
Fog Moves In
Fog settles over the Arctic Ocean Aug. 19, 2009.
Fog settles over the Arctic Ocean Aug. 19, 2009.
The Floe
An ice floe slides down the starboard side of the Coast Guard Cutter Healy Aug. 19, 2009.
An ice floe slides down the starboard side of the Coast Guard Cutter Healy Aug. 19, 2009.