Images

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

Instrumentation array with a YSI multiparameter sonde, a dissolved CO2 sensor, and a CDOM sensor.

Andy Reeves is holding a Glaucous Gull that was capture, sampled for avian influenza and banded near Barrow, Alaska.

Josh Koch and Steve Jepsen set up a GPS system before starting a day of mapping in the Nome Creek Experimental Watershed. https://www.usgs.gov/centers/asc/science/nome-creek-experimental-watershed?qt-science_

The old Kennecott copper mill from the north.  Kennecott was once a thriving mine and mill during the early 1900s. The mines are 5 miles up the mountain.

Spring breakup on May 21 on the Yukon River at Pilot Station, Alaska.

Panoramic image of ice break up on the Yukon River at Pilot Station, Alaska.

Mallard Duck swimming

Satellite image showing Barrow Alaska.

John Pohlman (USGS, left) and colleagues from the University of Alaska Fairbanks examine a sediment core retrieved through winter ice from the bottom of a lake in northern Alaska. Such cores are used to reconstruct methane emissions and climate history over the past 20,000 years.

Seven Pine Siskins foraging for food on the ground in Juneau, Alaska.

Rob Wilson adding prepared genetic material to a gel in the Alaska Science Center Molecular Ecology Laboratory.

Lisa Pajot extracting DNA from samples (specifically she is precipitating the DNA out of solution with ethanol).

Black-capped Chickadee with a crossed beak on a branch.

Bald Eagle on a broken tree on Juneau Beach, Juneau, Alaska.

A Bald Eagle on Juneau Beach in Juneau, Alaska

Bald Eagle on a broken tree on shore of Juneau Beach, Juneau, Alaska.

Sunset from the coastal Gulf of Alaska.

Sounding weight on the Copper River Delta, Alaska

Two polar bears swimming in the water in the Beaufort Sea

Drawing blood samples from an anesthetized polar bear