Images

Streamflow measurement in S Fk Spread Creek, WY (13012475)

Equipment is dropped through the holes drilled in the ice on the Little Wind River near Riverton to measure streamflow.

Stream stage is still accurately measured by equip under ice, and fluctuates a fair amount due to ice damming and accumulation. Streamflow, however, during most of the winter is typically quite stable.

Stream stage is still accurately measured by equip under ice, and fluctuates a fair amount due to ice damming and accumulation. Streamflow, however, during most of the winter is typically quite stable.

Lining up to finish our Snowmobile Safety Training class. Many of the roads we drive trucks on in the summer are inaccessible in the winter, so we must load up a machine.

Annie Carlson, Research Permitting Coordinator for Yellowstone National Park during 2017–2023, during a winter ski expedition in the park. National Park Service photo by Jon Nicholson, January 2020.

An unnamed small acidic (pH ~3) hot spring (with a temperature of about 55°C at the source) in the Gibbon Geyser Basin of Yellowstone National Park. The yellow region is due to the precipitation of sulfur by sulfide-oxidizing chemotrophic microorganisms.

Several adult wetsalts tiger beetles hunting and basking on and around an alkaline hot spring near Midway Geyser Basin in Yellowstone National Park. Photo by Robert K. D. Peterson, 2019.

Rhyolite lavas in the Yellowstone Caldera younger than 631,000 years

Sabrina Brown collecting samples from Yellowstone Lake core YL16-2C at the National Lacustrine Core Facility (LacCore) at the University of Minnesota.

A wide array of phototrophic microbial community textures exhibited in an alkaline (pH ~8.5) hot spring outflow channel in the Biscuit Basin, including thick mats, toadstools, ropes, and pinnacles. The differences in color are due to pigments (chlorophylls, bacteriochlorophylls, and carotenoids) produced by phototrophic microorganisms.

Sapphire Pool, an alkaline (pH ~7.5) spring in the Biscuit Basin area of the Upper Geyser Basin, Yellowstone National Park.

Wyoming is home to the country’s first official national park–Yellowstone, the country’s first national forest–Shoshone, and the country’s first national monument–Devil’s Tower.

Capital Cheyenne

Image Source Landsat 8

Population 576,851

A digital elevation map of Yellowstone National Park (left) with the location of Yellowstone Lake indicated by the white box. Satellite image (right) of the study site with collection location of core YL16-2C shown by the red circle. Map was originally published in Sabrina Brown’s dissertation (2019).

The Yellowstone River is divided into five reaches (labeled and color-coded): Yellowstone Lake, Hayden Valley, Grand Canyon of the Yellowstone, Tower–Gardner, and Mammoth.  Monitoring stations (yellow dots on map) between each reach of the river reaches allow geochemists to measure river composition and then determine the sources of chloride (Cl) and other solu

Map showing ice cover in the Yellowstone region. Light shaded areas bounded by black and red lines indicate areas covered during the Pinedale (about 20,000-15,000 years ago) and Bull Lake (about 150,000 years ago) glaciations, respectively. Blue lines are contours in thousands of feet on the maximum reconstructed Pinedale glacier surface.

Headwaters of Littlefield Creek

WY-MT Water Science Center 2019 all-hands meeting

Alpine meadow near Two Ocean Pass on the Continental Divide just south of Yellowstone National Park.

The USGS and partners study the effects of climate change on the Greater Yellowstone Ecosystem. This sunset image was taken from Steamboat Lake, Wind River Indian Reservation, Wind River Range, Wyoming.

Image of the north part of Yellowstone Lake with the smoke plume from the Brimstone Fire in the distance, acquired by the YVO webcam on September 2, 2019, at 2:05 PM MDT.