Images

Sophie Lafond-Hudson stands on a frozen lake in northern Minnesota on the spring equinox.

USGS scientist Grace Armstrong sampling plankton on Lake Mendota in Madison, Wisconsin.

MC-ICP-MS used for mercury stable isotope analyses.

Nippon mercury analyzer for sediments and fish.

Streamgage 05300000 Lac Qui Parle River Near Lac Qui Parle, Minnesota.

https://waterdata.usgs.gov/monitoring-location/USGS-05300000/

Hydrologic technician Garret Welsh carries a large ice auger while walking across the frozen St. Croix river near streamgage 05341550 in Stillwater, Minnesota.

Hydrologic technician Garret Welsh conducts an Ice Rod measurement through an augered hole in the frozen St. Croix river near streamgage 05341550 in Stillwater, Minnesota. An Ice Rod is a heavy-duty, 1-inch (2.5 centimeter) diameter, lightweight aluminum rod used for suspending ice meters in fast velocities.

Graduate student, Grace Armstrong, performing mercury uptake studies in plankton at Mercury Research Laboratory, Middleton, Wisconsin.

Photo of helicopter with geophysical equipment loop deployed below it via slingload. Technician for scale. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Photo of helicopter with geophysical equipment loop deployed below it via slingload. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Geophysical equipment loop with sensor from SKYTEM. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Helicopter with geophysical equipment loop deployed below it via slingload. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

A SkyTEM team member explains technology behind geophysical equipment loop to USGS employees. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Helicopter with geophysical equipment loop deployed below it via slingload taking off for survey flight. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Geophysical equipment loop for electromagnetic survey on ground prior to liftoff by helicopter. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Geophysical equipment survey hoop resting on ground in between flights. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

The U.S. Nuclear Regulatory Commission (NRC) regulates uranium mill tailings under the Uranium Mill Tailings Control Act of 1978. This drawing is a straight-forward cross sectional schematic of the different types of mill tailing covers.

This image was drawn for a fact sheet on Uranium mining in the Grand Canyon region, but was ultimately unused.  It still has utility to serve as inspiration to those who want to form ideas on how their science can be represented.  The image is quite literally, a view into the Grand Canyon.  But on a deeper level also is a conglomerate of both the geol

An acoustic Doppler current profiler (ADCP) measures stream velocity at streamgage 04045500, Tahquamenon River Near Paradise, Michigan.

https://waterdata.usgs.gov/monitoring-location/04045500/

Research hydrologist Laura Hubbard got to experience being a wildlife biologist for a few hours, holding her first duck as part of a planned Minnesota Department of Natural Resources banding in August 2020 near Thief River Falls, MN. The banding was part of research to understand the persistence of influenza A viruses in the environment.

The left axis is a visualization of an ensemble of solutions (crosses and dashed lines) iteratively moving down gradient on an objective function surface (color flood) in 2-D parameters space, with the associated prior (gray) and posterior (blue) parameter marginal distributions shown on the two right stacked axes.