Images

USGS scientist shoots a repeat photograph of Grinnell Glacier in Glacier National Park to illustrate glacial recession due to impacts of climate change.  *note – logo on scientists hat is logo from USGS Northern Rocky Mountain Science Center, not private.

The outlet tubes of Glen Canyon Dam were opened during the 2004 high-flow experiment on the Colorado River. 

IGBST researchers are very careful to keep the bear under shade and protected from the elements while they collect biological data.

The U.S.

A herder moves cattle through a barren landscape in eastern Africa.

Hoffstadt Creek is one of the salmon release sights after being radio tagged. This picture is taken just downstream from the release sight after a fish release.

A typical drill pad in the Marcellus Shale gas play of southwestern Pennsylvania.

A hydraulic fracturing operation is underway at this drilling pad in the Marcellus Shale gas play of southwestern Pennsylvania.

Fine-grained silica sand is mixed with chemicals and water before being pumped into rock formations to prevent the newly created artificial fractures from closing after hydraulic fracturing is completed.

Well heads hooked up in preparation for a hydraulic fracturing operation at a drill pad in the Fayetteville Shale gas play of Arkansas.

This USGS file photo was taken at a USGS gaging station on the Passadumkeag River at Lowell, Maine (01035000) in 1915. The USGS collected streamflow at this location from 1915 through 1979. The photo shows an unknown hydrographer standing next to a chain gage. The chain gage was used by a local observer to make manual readings of water level. 

The ice froze around the fence post, the stage in the river went up, then the river froze again, creating a large gage height correction - Heart River near Richardton, North Dakota.

An invasive species, the spiny water flea, is likely a primary driver of changes in Lake Huron's food web over the past decade.

These juvenile bighead carps are used to find potential physical, biological or chemical controls as part of an integrated pest management approach for natural resource managers.

Asian carp are invasive species that could pose substantial environmental risks and economic impacts if they become established.

These juvenile silver carps are used to find potential physical, biological or chemical controls as part of an integrated pest management approach for natural resource managers.

Asian carp are invasive species that could pose substantial environmental risks and economic impacts if they become established.

A Kelp Crab (Pugettia producta) captured in a beach seine during a 2012 Bainbridge Island larval forage fish survey.  This survey focused on the abundance, habitat use, and food habits of larval forage fish (surf smelt and sand lance) and was conducted by scientists from the Columbia River Research Laboratory -Western Fisheries Research Center.

These live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.

These live Asian swamp eels were imported from southeast Asia and sold in an urban food market in the U.S. Raw or undercooked Asian swamp eels could transmit a parasitic infection called gnathostomiasis to consumers, and wild eels could become widespread in some U.S. waters.

Some Polar bears in the Arctic can swim in excess of 200 miles.

Helicopter with magnetometer mounted in stinger.

A sample of gas hydrates collected from Mallik, Canada. Gas hydrates are naturally-occurring “ice-like” combinations of natural gas and water that have the potential to provide an immense resource of natural gas from the world’s oceans and polar regions.